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On-site application of self-compacting concrete (SCC)Rich, David January 2014 (has links)
Self-Compacting Concrete (SCC) is a material which under its own self-weight flows to form and fill any shape, attains full compaction, without external energy input, to create a dense homogenous mass (based on Holton, 2003; The Concrete Society and BRE, 2005; Damtoft et al, 2008). It is, in respect to the history of concrete, a relatively new development, with its first UK application occurring in the late 1990s. Since then a significant amount of research has sought to understand its physical and structural properties, but there is a lack of a knowledge base on its practical application and performance in construction projects. Where it does exist, such research lacks robust and transparent data, particularly relating to the claimed attributes of the material (such as better surface finish, faster construction and lower overall costs). Using a combination of qualitative and quantitative research methods, this research investigates the construction practices employed when pouring SCC and presents new data on its practical applications. Interviews with a range of building contractors, ranging from multinationals to small UK businesses (SMEs), show that current perceptions of SCC limit its use to specific applications because practitioners see SCC as just another type of concrete . A critical examination of these attitudes led to the identification of three distinct scenarios for the use of SCC: 1. Reactive selection: in which a particular attribute of SCC provokes its use to solve a particular problem, often as a last minute substitution for conventional concrete the most common scenario. 2. Strategic change: in which the material is chosen on the basis of a balanced assessment of all its benefits and on the understanding that such benefits can only be attained if the contractor appreciates that there may be implications for the construction process a rarely experienced scenario. 3. Specification: in which there is complete acceptance of SCC as a method, not just as a material; a significant amount of early project involvement with knowledge holders, such as contractors and material suppliers, optimises the construction process. A rigorous work measurement study of live construction projects has made it possible to quantify the as-built costs of SCC for selected UK residential slab and multi-storey flat slab applications and compare this with the equivalent conventional concrete slab construction. On-site use of self-compacting concrete vi The results indicate that SCC can reduce construction times of structural topping layers of residential slabs by up to 73%, and has shown that SCC can also match, if not reduce, total as-built concrete placement costs in multi-storey applications. This new data will enable contractors, designers and specifiers to better understand the practical implications of using SCC for on-site applications, thereby leading to more potential instances of its early and planned specification, hence resulting in more of its full benefits being realised.
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Precast concrete panel systems for housingChu, Alex H., 1945- January 1977 (has links)
No description available.
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Dynamic analysis of RC frames subjected to ground motions using the particle flow code (PFC)Davila-Sanhdars, Miguel Angel January 2005 (has links)
Reinforced concrete structures are usually vulnerable to collapse in areas where the earthquakes are frequent. Although plenty of research has been carried out in that regard the problem is still in place. Furthermore, there are buildings that did not collapse with the first and second earthquake but with the third one. That happens because many buildings are generally declared safe after being thoroughly inspected in the visible areas only, ignoring the extent of the damage in the column-to-foundation connections. The criterion of identifying the failure at the base of the columns of the ground floor is that after the earthquake there are no traces of failure. In other words, the cracks at the base of the columns have been healed and concealed the damage in the core of the columns. / thesis (PhDCivilEngineering)--University of South Australia, 2005.
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Blast effects on prestressed concrete bridgesMatthews, Debra Sue, January 2008 (has links) (PDF)
Thesis (M.S. in civil engineering)--Washington State University, August 2008. / Includes bibliographical references (p. 79-80).
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Panel zone behavior of moment connections between rectangular concrete-filled steel tubes and wide flange beams /Koester, Bradley Donald, January 2000 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2000. / Vita. Includes bibliographical references (leaves 191-194). Available also in a digital version from Dissertation Abstracts.
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Flexural strengthening of reinforced concrete beams by bolted side platesSiu, Wing-ho. January 2009 (has links)
Thesis (Ph. D.)--University of Hong Kong, 2009. / Includes bibliographical references (p. 237-242). Also available in print.
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Application of acousto-ultrasonic technique in evaluation of bond strength between composites and concrete substratesStoll, Stanley C. January 2009 (has links) (PDF)
Thesis (M.Eng.)--University of Louisville, 2009. / Title and description from thesis home page (viewed February 5, 2010). Department of Civil and Environmental Engineering. Vita. "August 2009." Includes bibliographical references (p. 113-115).
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Development and implementation of a mechanistic-empirical design procedure for a post-tensioned prestressed concrete pavement (PCP)Medina Chávez, César Iván. January 2003 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2003. / Vita. Includes bibliographical references. Available also from UMI Company.
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The failure analysis of FRP strengthened concrete beam /Yang, Yong. January 2003 (has links)
Thesis (M. Phil.)--Hong Kong University of Science and Technology, 2003. / Includes bibliographical references (leaves 106-109). Also available in electronic version. Access restricted to campus users.
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The anchorage behavior of headed reinforcement in CCT nodes and lap splicesThompson, Keith 28 August 2008 (has links)
Not available / text
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