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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
421

Bleeding and Filtration of Cement-Based Grout

Draganovic, Almir January 2009 (has links)
Grouting is a common method of sealing rock around tunnels to reduce or stop water inflow. Successful grouting significantly minimizes the maintenance cost and safety of the tunnel. Some questions about bleeding and penetrability of the grouts have to be examined more closely to carry out a successful grouting. Bleeding of cement-based grout is a complex problem. Measuring methods used today originate from the measuring of the bleeding of cement pastes used in ordinary building industry. Whether bleeding measured with a standard method is relevant for bleeding in small fractures in rocks is one of the main questions in this study. The aim of the study is to illustrate what really happens with a grout during bleeding and which factors and processes influence it. In this way relevant measuring methods can be developed as well as the knowledge regarding interpretation of the measured results. The study has shown the most important factors which governs bleeding in cement-based grout. It has also shown that the results measured with standard methods are not relevant for bleeding of grout in rock joints and that voids in the joints caused by bleeding could be refilled during grouting itself. An important aspect of grouting is penetration of the grout. The penetration is defined as the length of how far grout penetrates in the rock through fractures from a bore hole. Filtration of the grout is a result of a plug building at fracture constrictions which reduces the penetrability of the grout. This is the other important issue discussed in the study which examines the question whether this can be measured by some measuring method and which factors and processes influence penetrability and filtration. A hypothesis of how the factors w/c ratio, pressure and relative constriction influence penetrability are presented and tested by special constructed measuring equipment. The results obtained by this measuring equipment are compared with the results measured with a penetrability meter. / QC 20100709
422

Developing and implementing a process of integrating internal and external customers and technology in the building components industry /

Karvinen, Kauko. Unknown Date (has links)
The construction industry forms an important part of national economies from the United States and the United Kingdom to Australia and Singapore. The industry is a large employer and is described as being traditional, fragmented, adverse in culture and poor in quality. It has a specific problem of two types of production, namely design and actual construction. Human resource issues are neglected as the industry operates by project management, which does not allow for systematic and long term organisational development. These factors, in short, have caused the industry to remain disintegrated. / The purpose of this research was to investigate how a process of integrating internal and external customers and technology could be developed and implemented in the building components industry. The research problem revolved around the customer orientation concept, which other industries claim to have implemented successfully. The research problem was conceptualised as lack of internal and external customer orientation. / The research was carried out in a company called Eastern Pretech Pty. Ltd in Singapore, and more particularly in its precast concrete division, which is a unit of analysis employing some 80 staff members and 300 workers. The sequential order of work-design, production, delivery and installation- had created disintegration in the approach to external customers. The products of the division included design, manufacturing and delivery/installation of structural frames of buildings, including columns, beams, slabs and walls. / For the purpose of undertaking the investigation the researcher developed an exploratory case study strategy, which was justified as being an inquiry into unknown phenomena where no similar studies had been made in the precast concrete industry or in the construction industry in general. Because of the exploratory nature of the inquiry there were no hypotheses to be tested, but rather research questions to be answered. / The researcher justified the use of participant action research for the purpose of the investigation. The research design was divided into conceptual and action research method stages. The conceptual stage included the past experience and interest of the researcher and well as the literature review, and the action research method stage included the case study analysis and thesis writing. The researcher was a participant observer when carrying out the case research. / In conclusion, the exploratory case study strategy resulted in rich data, which showed evidence of change occurring and integration happening. The action research case study was concluded in a real life situation, where the uncertainty of outcomes and almost impossibility of forecasting results allowed the researcher to use imagination in constructing new concepts and theories using the participant action research method. The results included the development of an ICO model which can form the basis for further investigations. The research made contributions to marketing and other aspects of management- in particular to customer orientation, total quality management and the organisational development literature in the area of construction. The research also fulfilled the dual goals of action research by contributing to knowledge and practice. / Thesis (PhD)--University of South Australia, 2002.
423

Risk management :

Ng, Tze Ling. Unknown Date (has links)
The Risk Management approach in project management has been a subject of discussion for quite a number of years now, either through reports and studies by professional institutions, or between general practitioners or project managers in the industry. Yet, this procedure is still not provided as much as the amount predicted by the many studies and research done to identify the benefits and necessity of implementing this process, early in the project life cycle, especially within the construction industry. / Many previous research findings done by many learned researchers have identified the reasons for the lack of use or under use of Risk Management in the conceptual stage. This may be due to complexity of technique; the process of Risk Management is too long and time consuming; lack of information or resources needed for the process; or just general lack of understanding of Risk Management technique by the project managers or practitioners in delivering this service. / It is discussed that the conceptual phase may be the most important stage to conduct Risk Management, since decisions taken in this phase tend to have a significant impact on the final cost. It is also the phase at which the greatest degree of uncertainty about the future is encountered. In response to this type of situation, Risk Management can play an important role in controlling the level of risks and mitigating their effects. / Both a structured questionnaire and interview will be used as the research tools of this thesis, to collect data from the selected professional project managers, based in Australia, that specialise in the construction projects which are deemed as the initiators of the Risk Management process. / The frequency of Risk Management utilisation in the conceptual stage will increase when it is incorporated into company policy or procedures. Yet compared to any existing common tools or techniques that are available, very often project managers implement Risk Management by applying from past experiences which are not transferable to the younger 'practitioners', nor was it able to be documented for future reference. Therefore, during the early phases of the project lifecycle, all stakeholders should participate and be included in a Risk Management workshop where benefits of this service can be encouraged, and 'educated'. / Thesis (MProjectManagement)--University of South Australia, 2004.
424

Analysis of risks allocation in building contracts :

Ma, Tony Yuen Fat. Unknown Date (has links)
Thesis (MProjMgmt)--University of South Australia, 1998
425

Innovative lightweight floor systems for steel framed buildings /

Hillman, John R., January 1990 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1990. / Vita. Abstract. Includes bibliographical references (leaves 103-105). Also available via the Internet.
426

Diurnal bird use of snags on clearcuts in central coastal Oregon /

Schreiber, Barry. January 1987 (has links)
Thesis (M.S.)--Oregon State University, 1988. / Typescript (photocopy). Includes bibliographical references (leaves 60-63). Also available on the World Wide Web.
427

The emergence and preservation of sick building syndrome : research challenges of a modern age disease /

Thörn, Åke, January 1900 (has links)
Diss. (sammanfattning) Stockholm : Karol. inst. / Härtill 6 uppsatser.
428

Inelastic performance of welded cold-formed steel strap braced walls

Comeau, Gilles. January 1900 (has links)
Thesis (M.Eng.). / Written for the Dept. of Civil Engineering and Applied Mechanics. Title from title page of PDF (viewed 2008/04/12). Includes bibliographical references.
429

An experimental apparatus for the measurement of sorption isotherms of moisture in porous building materials /

Peters, Richard Edward, January 1992 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1992. / Vita. Abstract. Includes bibliographical references (leaves 56-59). Also available via the Internet.
430

Long cycles in the building industry

Long, Clarence D. January 1900 (has links)
Thesis (Ph. D.)--Princeton University, 1938. / Cover title. "Reprinted from the Quarterly journal of economics, vol. LIII, no. 3, May, 1939."

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