This study focused on the material characterization of granular materials containing different percentages of “RAP”. A series of laboratory tests results were carried out to determine the physical and mechanical properties of natural aggregates and various aggregate-RAP blends. The results were used to evaluate methods to develop high-performance granular layer for pavement construction through proper compaction and control of RAP usage. The resilient modulus and accumulative deformation characteristics were determined in relation to RAP content, relative density, compaction method, stress level, stress state and the number of load applications. The effects of RAP content and density on the CBR values of aggregate-RAP blends under various conditions were also investigated. In addition, the effect of small strain cyclic loading on shear strength of aggregate-RAP blends was observed in laboratory tests. Results from this investigation demonstrated that: 1) adding RAP to natural aggregates may increase the resilient modulus of natural aggregates, and optimum content can be found to achieve the highest resilient modulus; 2) resilient modulus generally increases with density; higher density of aggregate-RAP blends can be achieved by using methods combining vibration and static loading. 3) deviatoric stress has more pronounced influence on accumulative deformation than confining pressure. 4) proper compaction method can reduce accumulative deformation of samples. 5) addition of RAP into aggregates results in little change in accumulative deformation when the RAP content is less than a threshold. 6) CBR value decreases with increasing RAP content and decreasing compaction effort or compacted dry density. 7) shear strength of an aggregate-RAP blend tends to increase after small strain cyclic loading. / Thesis / Master of Applied Science (MASc)

This thesis investigates the effect of added asphalt binder content on the performance and volumetric properties of asphalt concrete mixes containing Reclaimed Asphalt Pavement (RAP). Mixes with three different percentages of RAP (0%, 20%, 40%) obtained from an asphalt producer and three different percentages of asphalt binder (design asphalt content, design +0.5%, and design +1.0%) were evaluated. Additionally, a laboratory produced mix containing 100% RAP with four asphalt binder contents (0.0%, 0.5%, 1.0% and 1.5%) was also evaluated in order to determine the binder level that optimizes mix performance for the extreme case in RAP utilization. Performance of the mixtures was evaluated based on three criteria: stiffness (dynamic modulus), fatigue resistance (flexural beam), and rutting resistance (flow number). Results showed that a 0.5% increase in binder content improved both the fatigue and rutting resistance of the 0% and 20% RAP mixes with only slight decreases in dynamic modulus. However, the addition of various amounts of binder to the 40% RAP mix led to a significant decrease in rutting resistance with little or no improvement to fatigue resistance. Volumetric analysis was performed on all of the mixes to determine how the added binder content affected mix volumetric properties. Results of volumetric testing, specifically asphalt content and Voids in the Total Mix (VTM) at the design compaction effort, Ndesign, revealed that the 40% RAP mix incorporated a significantly higher level of binder during plant production which very likely contributed to the decrease in rutting resistance once additional binder was added in the laboratory. Additionally, the gyratory compaction effort that would result in 4 percent VTM at the optimal binder content over the three performance tests, N4%, was calculated for each mix. Results indicated that the VTM for the optimally performing 20% and 40% RAP mixes were well below current Virginia Department of transportation (VDOT) production standards. In addition, N4%, for the optimally performing 20% and 40% RAP mixes was 50% or less than the current design compaction effort of 65 gyrations. / Master of Science

This thesis broadly addresses the issue of materials sustainability in the production of Portland cement concrete. Two methods are presented, both aimed at achieving more sustainable concrete through the use of waste and recycled materials. The first method involves utilizing reclaimed asphalt pavement (RAP) as an aggregate in structural concrete, and the second method involves utilizing waste quarry fines as partial replacement of Portland cement in concrete mixes. Many efforts have been made in recent years to justify the use of RAP aggregates in concrete. All previous efforts appear to unanimously report a reduction in concrete performance with varying proportions of RAP usage. The poor performance of RAP aggregates in concrete is attributed mainly to a larger, more porous interfacial transition zone (ITZ) and to the cohesive failure of the asphalt. It is hypothesized that the detrimental impact on the ITZ is attributable to organic compounds leached from the asphalt in the high pH pore solution. This study proves the presence of organic compounds in the pore solution and demonstrates that there is an apparent retardation of cement hydration. This study also attempted to pretreat the RAP in a sodium hydroxide (NaOH) solution to pre-leach the organic compounds. The pretreatment demonstrated that organic compounds were leached and that NaOH modified the asphalt surface chemistry. However, only a marginal improvement in compressive strength was observed by completing the pretreatment. Replacement of Portland cement by filler products is a practice aimed at reducing the carbon footprint of concrete, such as is common with Type IL Portland limestone cement. This study investigates the impact of replacing cement with seven different quarry fines materials. The quarry fines were used to replace cement at 5% to 20% by volume in either cement paste or mortar samples that were then analyzed for various physicochemical properties. It was found that all the quarry fines had detrimental impact on the hydration kinetics of cement pastes. The inclusion of quarry fines was also found to cause varying degrees of reduction in mortar compressive strength. While further analyses of the quarry fines are required, quarry fines 2, 5 and 7 did display encouraging signs to suggest the potential for use as a filler material in blended cements. / Master of Science / This thesis broadly addresses the issue of sustainability in the cement and concrete industry. Sustainability is a significant problem for the cement and concrete industry due to the large amount of carbon emissions produced in the manufacturing process of Portland cement. One method to reduce the carbon footprint of concrete is to use recycled aggregates, and reclaimed asphalt pavement (RAP) is investigated in this thesis as a recycled aggregate option. Previous studies have shown that the use of RAP in concrete results in poor mechanical performance when compared to conventional concrete. In this thesis, the RAP was pretreated by soaking it in sodium hydroxide (NaOH) to see if any improvement is noted. It was determined that the pretreatment resulted in marginal improvements in concrete performance. Another method to reduce the carbon footprint of concrete is through the use of substitutions of Portland cement. In this thesis, quarry fines from around Virginia were investigated for potential as substitutive material. Quarry fines are a by-product from quarrying operations and are often considered a waste material because they have limited applications. This study analyzed the performance of cementitious materials prepared with various substitutive percentages of quarry fines and found that, in general, the inclusion of quarry fines resulted in a decrease of mechanical performance. In total, seven quarry fines were tested and only two showed potential for use as a substitution in Portland cement concrete. These two investigations are essential in reaching the goal of reducing the carbon footprint of the cement and concrete industry.

A water supply plan approach was used to investigate irrigation application on landscaped areas in Virginia with a focus on turfgrass. The economically-important turfgrass industry in Virginia should be proactive in conserving drinking water supplies to meet human consumption needs, especially in drought times. This thesis investigates current irrigation water supplies, water supply sustainability, and alternative water sources to meet irrigation demands and offers an insight on how potable water is unnecessarily consumed for non-potable irrigation needs. A Virginia evapotranspiration website was developed to offer a scientifically based source for efficient irrigation scheduling. The website was developed using a collaborative and user-centered design method, which included potential users in the process. The final website is hosted on the Virginia Tech website at http://www.turf.cses.vt.edu/Ervin/et_display.html and utilizes data from weather stations throughout the state. Evapotranspiration-based irrigation was tested at three case study sites in Blacksburg, Williamsburg and Norfolk, Virginia to assess potential water conservation. In Williamsburg, a 55% water savings was reported with evapotranspiration-based irrigation. In Blacksburg, slightly more water was applied on research greens irrigated based on evapotranspiration demand. Significantly less water was applied in Norfolk, compared to the evapotranspirationbased irrigated plots. The study also uncovered increased confidence to alter irrigation systems and the need to conduct irrigation audits when irrigating based on evapotranspiration. Evapotranspiration-based irrigation, reclaimed water and harvested rainwater were investigated to determine feasibility for meeting irrigation demands, while reducing potable water consumption at four case study sites in Blacksburg, Fairfax, Williamsburg and Norfolk, Virginia. Due to the limited collection potential at the Blacksburg site, reclaimed water and harvested rainwater was not feasible. However, the on-site weatherstation could offer a unique opportunity to calculate evapotranspiration. In Fairfax, all three alternative water sources could be integrated to supply enough water to irrigate a soccer field and adjacent athletic fields and save an estimated $7,000 per season in potable water costs. Harvested rainwater at the Williamsburg site could supplement the irrigation pond and reduce reliance on groundwater. In Norfolk, reclaimed water use is economically feasible, but rainwater harvesting could meet the irrigation needs, while evapotranspiration-based irrigation is too labor intensive for homeowners. / Ph. D.

The Occoquan Reservoir is a public water supply in northern Virginia. The Occoquan Watershed has developed over the years from rural land uses to metropolitan suburbs within easy commuting distance from Washington, DC. Due to this urbanization, the Occoquan Reservoir is especially vulnerable to hypereutrophication, which results in problems such as algal blooms (including cyanobacteria), periodic fish kills, and taste and odor problems. In the 1970's, a new management plan for the Occoquan Reservoir called for the construction of the Upper Occoquan Sewage Authority (UOSA), an advanced wastewater treatment plant that would take extraordinary measures for highly reliable and highly efficient removal of particulates, organics, nutrients, and pathogens. Eliminating most of the water quality problems associated with point source discharges in the watershed, this state-of-the-art treatment is the foundation for the successful indirect surface water reuse system in the Occoquan Reservoir today. A limnological analysis of thirty years of water quality monitoring data from the reservoir and its two primary tributaries shows that the majority of the nutrient and sediment load to the reservoir comes from nonpoint sources, which are closely tied to hydrometeorologic conditions. Reservoir water quality trends are very similar to trends in stream water quality, and the tributary in the most urbanized part of the watershed, Bull Run, has been identified as the main contributor of sediment and nutrients to the reservoir. Despite significant achievements in maintaining the reservoir as a source of high quality drinking water, the reservoir remains a phosphorus-limited eutrophic waterbody. / Master of Science

Opportunistic pathogens (OPs) are of special concern for immunocompromised populations and are known to grow in both drinking water and reclaimed water (i.e., non-potable recycled water) distribution systems, with aerosol inhalation and other non-ingestion exposures that are not addressed by existing regulatory frameworks. Factors enabling the growth of OPs in water distribution and premise (i.e., building) plumbing systems distributing reclaimed and other water sources systems are poorly understood especially for the emerging OP, Naegleria fowleri (i.e. brain-eating amoeba). Three phases of investigation were carried out to identify factors that facilitate the growth of OPs in main distribution and premise plumbing systems, with particular attention on reclaimed water systems, aging water mains, and private well systems. Phase one examined the role of biological treatment to remove organic carbon and disinfectant type on the occurrence of OPs during distribution of reclaimed water. Laboratory-scale simulated reclaimed water distribution systems were employed to systematically examine the effects of prior granular activated carbon (GAC) biofiltration of the water; chlorine, chloramines, or no disinfectant, and water ages ranging up to 5 days. The second and third phases of research explored the role of nitrification, iron corrosion, and disinfectant on the growth of N. fowleri both in municipal drinking water from a city grappling with aging water infrastructure and untreated private well water. Results from the simulated reclaimed water distribution systems suggested that biologically-active GAC filtration may unintentionally select for specific OPs, contrary to expectations and experiences with oligotrophic conditions in potable water systems. While GAC biofiltration was associated with lower total bacteria and Legionella spp. gene markers, there were no apparent benefits in terms of other OPs analyzed. Similarly, disinfectant treatments successful for controlling OPs in potable water were either ineffective or associated with increased levels of OPs, such as Mycobacterium spp. and Acanthamoeba spp., in the reclaimed water examined. In the potable water study, it was possible to recreate conditions associated with growth of N. fowleri in the aged main distribution system from where the water for the experiment was collected; including corroding iron mains, nitrification, and disinfectant decay. While the effects of nitrification could not be confirmed, there was a clear association of iron corrosion with N. fowleri proliferation. The role of iron was explored further in what, to the author's knowledge, was the first study of N. fowleri in private wells. Analysis of 40 wells found correlations between N. fowleri and stagnant iron levels, further supporting the hypothesis that iron corrosion or iron encourages the growth of N. fowleri, and, because wells are not routinely disinfected, not necessarily as a result of promoting disinfectant decay. As this study took place following a major flooding event, it provided insight not only into how surface water contamination may influence private well water microbial communities, but also added to the understanding that current recommendations for disinfecting private wells are inadequate and standards should be implemented to aid homeowners in the event of flooding. This exploratory research illuminated several factors influencing the OP growth in a range of water systems. Identifying key variables that control growth is crucial to improving the safety of these systems. / MS

As demand for alternative water sources intensifies, increased use of reclaimed water is important to help achieve water sustainability. In addition to treatment, the manner in which reclaimed water is distributed is a key consideration as it governs the water quality at the point of use. In this work, simulated reclaimed water distribution systems (SRWDSs) were operated for more than two years to examine the role of system design, biofiltration, residual disinfectant type (i.e., chlorine, chloramine, no residual) and temperature on important aspects of chemistry and microbial regrowth under laboratory-controlled conditions. Turbidity decreased to 0.78 NTU after biofiltration and chlorinated treatments from 10.0-12.6 NTU for conditions with chloramine and no residuals. SRWDSs were susceptible to sediment accumulation, which occupied 0.83-3.2% of the volume of the first pipe segment (1 day of hydraulic residence time), compared to 0.32-0.45% volume in the corresponding chlorinated SRWDSs. The mass of accumulated sediment positively correlated (R2 = 0.82) with influent turbidity. Contrary to experiences with potable water systems, chlorine was found to be more persistent and better at maintaining biological stability in the SRWDSs than chloramine, especially at the higher temperatures >22°C common to many water scarce regions. The severe nitrification at the warmer temperatures rapidly depleted chloramine residuals, decreased dissolved oxygen, and caused elevated levels of nitrifiers and heterotrophic cell counts. A metagenomic taxonomic survey revealed high levels of gene markers of nitrifiers in the biofilm samples at 22°C for the chloraminated system. Non-metric multidimensional scaling analysis confirmed distinct taxonomic and functional microbial profiles between the chlorine and chloramine SRWDSs. Reflecting on multiyear experiences operating two different SRWDSs reactor designs, including thin tubes (0.32-cm diameter) and pipe reactors (10.2-cm), illustrated strengths and weaknesses of both approaches in recreating key aspects of biochemical changes in reclaimed water distribution systems. It is clear that approaches deemed successful with drinking water distribution systems may not always directly transfer to simulating reclaimed distribution systems, or to proactively managing full-scale reclaimed systems that have long periods of stagnation and where minimally-treated wastewater with high levels of nutrients and turbidity are used. / Doctor of Philosophy / Increasing water scarcity is creating an impetus for creating more sustainable water supplies. Wastewater effluent is increasingly viewed as in important resource that can reduce both water and energy demand. Reclaiming moderately to minimally-treated secondary wastewater effluent for non-potable reuse (NPR) applications; such as agricultural irrigation, landscaping, and toilet flushing, helps reduce demand for higher quality potable water sources. NPR presently accounts for more than 50% of total reuse and is projected to become increasingly important. While NPR is attractive, important knowledge gaps remain in terms of managing water quality and safety as it is transported through distribution pipes to the point of use. A comprehensive literature review revealed that NPR distribution systems are distinct from conventional drinking water distribution systems (DWDSs) and that it is doubtful if our current understanding of DWDSs would directly transfer to NPR systems. Unlike drinking water systems, NPR systems are currently unregulated at the national level and corresponding state-to-state regulations vary widely. The levels of water treatment can vary from simply distributing untreated effluent from wastewater treatment plants to very high-level treatment with membranes that produces water of equal or even higher quality than many existing tap waters. A common treatment train for minimally-treated NPR involves biologically activated carbon (BAC) filtration and the use of disinfectants (e.g., chlorine or chloramine) to control microbial water quality to the point of use. Prior studies from DWDSs have demonstrated water quality degradation in terms of disinfectant loss, bacterial growth, and aesthetic problems, with the settling of trace particulate matter producing sediment within pipe distribution systems. In particular, accumulated sediment can become a hotspot for water quality deterioration. Considering that minimally-treated reclaimed water can have much higher levels of particulate matter and nutrients than drinking water, it was predicted that NPR distribution systems could suffer from faster water quality degradation than corresponding drinking water systems, especially at the warmer temperatures common in water-scarce regions. This work was the first multi-year attempt to examine the effects of disinfectant (i.e. free chlorine, chloramine, no residual), BAC filtration versus no filtration, water age (up to 5-d versus 28-min), and temperature (14°C, 22°C, 30°C) in different types of lab-scale reactors. Two simulated reclaimed water distribution systems (SRWDSs) including 4-in. diameter Pipe SRWDSs versus 1/8-in. diameter Tube SRWDSs, were designed to study key aspects of full-scale NPR systems and were operated for more than two years to study chemical and microbial changes as distributed water traveled through the two systems. The Pipe SRWDSs were designed to assess the impacts on final water quality after long-term operation that allowed sediment to slowly accumulate, whereas the complementary Tube SRWDS design did not allow sediment to accumulate and only held the water for 28 minutes. Water was sampled regularly to track the trends of key water quality parameters, including disinfectant residuals, dissolved oxygen, nitrogen compounds involved in nitrification reactions, and various types of bacteria of interest. Sequencing of the biological genetic materials on selected samples was conducted to understand the types of bacteria present and their functions under the different circumstances. High levels of sediment were found to accumulate near the beginning of the Pipe SRWDSs, which caused loss of oxygen and disinfectants at the bottom of the pipes. Chlorine was more persistent and better at preventing bacteria growth as water traveled through the distribution system. In contrast, a type of bacteria that used ammonia as a nutrient (i.e., nitrifying bacteria) were observed in the pipes with chloramine (i.e., ammonia plus chlorine) as the disinfectant. The nitrifying bacteria caused rapid depletion of chloramine residuals, especially at temperatures above 22°C. At 30°C both chlorine and chloramine were almost immediately consumed in the pipe reactors. Nitrification is known to trigger water quality problems in chloraminated DWDSs, and we expect that chloraminated RWDSs would be even more susceptible to nitrification and associated water quality degradation issues in Compare the Tube SRWDSs to the Pipe SRWDSs, aside from heavy accumulations of sediment in the pipes versus no sediment in the thin tubes, the tubes clogged repeatedly from formation of thick biofoulants in the systems treated with no disinfectant and chloramine, whereas they remained relatively free of biofoulants and clogging in the tubes with chlorine. Even in just 28 minutes, it took water to move from the start to the end of the tube, both chlorine and chloramine were almost completely consumed in the tubes, due to the unrealistically high pipe surface area to the small flow volume inherent to this reactor design. As NPR becomes increasingly common to help achieve water sustainability, it will be important to deploy laboratory simulations, that are capable of testing and revealing key chemical and microbial processes that affect the operation of these systems and water safety at the point of use. The insights from this first long-term effort of simulating RWDSs highlight some unique characteristics and challenges of RWDSs, and reveals key concepts to help guide future research.

Master of Science / Department of Civil Engineering / Mustaque Hossain / The ultra-thin bonded bituminous surface (UBBS), popularly known as Novachip, is a thin hot-mix asphalt layer with high-quality, gap-graded aggregates bonded to the existing surface with a polymer-modified emulsion membrane. This thin surfacing improves ride quality, reduces road-tire noise, minimizes back spray, and increases visibility under wet conditions. The Kansas Department of Transportation (KDOT) has been using UBBS since 2002. Performance of this thin surface treatment strategy has been good in Kansas and elsewhere. However, some of these projects are now being rehabilitated. The objective of this study is to evaluate whether reclaimed asphalt pavement (RAP) materials from existing UBBS layers can be used in chip seal and Superpave mixtures. UBBS millings were studied with two different polymer-modified emulsions to assess their performance as precoated aggregates in chip seal. The ASTM D7000-04 sweep test was used to assess chip retention of UBBS millings. Three different mix designs were developed for both 12.5-mm and 9.5-mm nominal maximum aggregate size (NMAS)Superpave mixtures using a PG 70-22 asphalt binder and three different percentages (0%, 10%, and 20%) of reclaimed UBBS materials. The designed Superpave mixes were then tested for performance in terms of rutting and stripping using the Hamburg wheel tracking device (HWTD)and moisture sensitivity by modified Lottman tests. Sweep test results showed that UBBS millings did not improve chip retention. Superpave mix design data indicated volumetric properties of Superpave mixes with UBBS millings met all requirements specified by KDOT. HWTD and modified Lottman test results indicated all designed mixes performed better with the addition of UBBS millings as RAP materials. Field performance of UBBS projects was also evaluated. It was found that pavements treated with UBBS showed high variability in service life with majority serving six years. Before and after (BAA) studies showed that UBBS reduces pavement roughness, transverse and fatigue cracking one year after the treatment. However, no consistent improvement in rutting condition was found.

A utilização de misturas asfálticas recicladas com alto teor de material fresado (RAP) tem se tornado atrativa nos últimos anos por ser uma opção sustentável e que permite reduções de custo nas obras de pavimentação. No entanto, a produção dessas misturas sem prejuízo ao seu desempenho em campo ainda é um desafio. Diferentemente do que ocorre na reciclagem a frio, nas reciclagens a quente e morna o ligante envelhecido presente no RAP é mobilizado, ou ativado, mas é difícil mensurar em que grau isso ocorre. Dessa forma, a dosagem é feita de forma imprecisa, podendo comprometer o desempenho da mistura reciclada final. O presente trabalho tem como objetivo analisar a aplicabilidade de procedimentos laboratoriais para a avaliação da ativação do ligante presente no material fresado e da interação entre os ligantes (velho do RAP e novo adicionado), em misturas asfálticas recicladas através dos processos a quente e morno. O método de análise da ativação do ligante foi aplicado em diferentes tipos de material fresado, e um procedimento de extração por etapas foi desenvolvido para analisar o grau de interação entre ligantes na reciclagem. Neste processo, a extração do ligante asfáltico presente na mistura é realizada em etapas, de forma a separá-lo em camadas, e os ligantes obtidos em cada etapa são recuperados, sendo avaliada a homogeneidade entre eles por meio de ensaios reológicos. Os resultados mostraram que é possível obter informações relevantes acerca dos mecanismos de ativação e de interação entre ligantes por meio dos métodos analisados, principalmente em relação à presença de polímero no RAP e na identificação do grau de interação entre ligantes. / The production of recycled asphalt mixtures with high contents of reclaimed asphalt pavement (RAP) has become attractive in the past few years, as it is a sustainable solution which allows considerable cost reductions. However, the production of these mixtures without losing performance in the field is still a challenge. Different from what happens on cold recycling, on hot and warm recycling processes the aged asphalt binder present in the RAP is activated, and it is difficult to determine the degree to which this happens. As a result, the mix design is often not done properly, what might compromise mixture performance. The present study aims to analyze the applicability of laboratory procedures to evaluate the RAP binder activation and the blending between fresh and RAP binders, in hot and warm recycled asphalt mixtures. The method for evaluating RAP binder activation was applied to different types of RAP, and a staged extraction method was developed to assess the degree of binder blending in recycled mixtures. In this process, binder extraction is conducted in three steps, dividing the binder in three layers. The binder layers obtained are recovered, and the homogeneity between them is determined through rheological testing. The results obtained showed it is possible to obtain relevant information by applying the studied methods, especially regarding the presence of polymer in the RAP and the degree of blending in recycled mixtures.

A restauração de pavimentos flexíveis ocasiona, em todo o mundo, problemas ambientais em função do descarte dos materiais provenientes da demolição do pavimento existente, um dos motivos pelo qual a reciclagem de pavimentos tem se mostrado, cada vez mais, uma técnica sustentável e necessária, tanto na manutenção quanto na construção de novas estruturas. Na atualidade, existem as mais diversas técnicas de reciclagem. Neste trabalho, avaliou-se a reciclagem do revestimento asfáltico fresado (RAP) com a adição de agente de reciclagem emulsionado (ARE), estudando a viabilidade de seu emprego em bases asfálticas de pavimentos novos. Por meio de um programa laboratorial de ensaios, foi realizada a análise da estocagem, cura e compactação de uma mistura produzida em uma usina de reciclagem a frio. Para tanto, utilizou-se os parâmetros de módulo de resiliência (MR), resistência à tração por compressão diametral (RTCD) e dano por umidade induzida (DUI). A compactação da mistura no laboratório foi realizada com o Compactador Giratório SUPERPAVE (CGS) e com o Compactador Marshall, sendo avaliada a influência do tempo de estocagem, que é o tempo transcorrido entre a mistura e a compactação (na condição solta), e o tempo de cura após a compactação dos corpos de prova. Os resultados indicam que os parâmetros de MR, RTCD e DUI aumentaram quando a mistura solta permaneceu estocados, pela provável interação entre o agente de reciclagem emulsionado e o ligante asfáltico oxidado do RAP. Foi observado ainda um ganho substancial nos valores de MR e RTCD durante o período de cura, o qual foi pouco influenciado pela estocagem prévia do material. Quanto ao efeito do tipo de compactação, foi possível observar que os corpos de prova produzidos no CGS apresentaram maiores valores de RTCD, MR e DUI em relação aos corpos de prova do compactador Marshall, chegando, inclusive, a dobrar o valor de RTCD após 56 dias de cura. Também foi realizada a construção de dois trechos experimentais com a mistura reciclada estudada, visando o acompanhamento da execução, assim como, o monitoramento do desempenho da mistura, em campo, ao longo do tempo. Constatou-se que foi possível atingir a densidade obtida na compactação Marshall desde que sejam utilizados rolos compactadores adequados e que a espessura da camada seja limitada em até 8 cm. Já os levantamentos deflectométricos realizados durante o monitoramento confirmaram o comportamento mecânico observado em laboratório, indicando o ganho de rigidez da base reciclada ao longo do tempo. Conclui-se, portanto, que o emprego da mistura a frio de RAP com agente de reciclagem emulsionado é uma alternativa viável para a construção de bases de pavimentos rodoviários novos. / Asphalt pavements maintenance produces worldwide residues from milling of deteriorated pavements. Therefore, pavement recycling is a sustainable and necessary technique for new pavement construction and rehabilitation. Nowadays, there many technologies to apply recycling to pavement maintenance. This study evaluated the reuse of the reclaimed asphalt pavement (RAP) mixed with emulsified asphalt recycling agent and its viability to be used as an asphalt base course in new pavements. A laboratory program was used to assess the storage, the cure and compaction of a mix of RAP - emulsified asphalt recycling agent produced in a cold central plant recycling plant (CCPR). The resilient modulus (MR), the indirect tensile strength (ITS) and the moisture induced damage (MID), were used. The compaction at the laboratory was performed using de Superpave Gyratory Compactor (SGC) and the Marshall compactor. The storage period is referred as the time elapsed between the mix and the compaction, in the loose condition. On the other hand, the curing period is associated to the period elapsed after compaction of the specimens. Results showed that the storage period has little effect on the MR, ITS and MID parameters. However, this period was important to likely allow the emulsified asphalt recycling agent to interact with the aged asphalt binder from the RAP. It was observed a substantial increase of MR and ITS parameters during the curing and, again, the storage period had little effect on this. Regarding the compaction method, the SGS specimens had higher values at ITS, MR and MID values, when compared to the Marshall specimens. At the curing time of 56 days, the ITS was doubled at the SGS specimens. Additionally, this study performed the construction of two trial sections with the studied mix. The goal was to register the execution and assess its performance in field during a period. It was verified that in field is possible to reach Marshall densities, since adequate roller compactors are used with specific thickness. The performance of the trial sections was done from FWD testing. These results confirmed the laboratory mechanical behavior of the recycled cold mix, showing that the curing increase of the stiffness. Therefore, it is concluded that the cold mix using emulsified asphalt recycling agent is a viable alternative for the base course construction of new road pavements.