Sharif Digital Repository

The objective of the present study is to depict an inclusive Construction Waste Management (CWM) plan looking at the total project life cycle. This holistic approach is called Integrated Construction Waste Management (ICWM). This research program has been conducted through several consecutive academic dissertations at Civil Engineering Department of SUT and was firstly aimed to identify waste sources throughout project life cycle. Concurrent research efforts were focused on project delivery methods evaluation, e.g. contract type effect on waste generation amount along with appropriate guidelines/incentives development that could promote ICMW. These studies were conducted via field... 

Construction industry is one of the most important fractions of economy in developing countries. This industry consumes enormous amounts of raw materials and produces considerable waste. The optimization of construction material usage not only saves costs but also can significantly contribute towards Sustainable Development. This article addresses Construction Waste Management as an approach to improve construction productivity, with a focus on its application in developing countries. The status of construction waste production and management in Tehran metropolitan, Iran-as a developing country-is investigated and compared with the status of developed countries. Subsequently, barriers to... 

The purpose of this research was twofold; first, it focused on developing quantitative wastage models for rebar, concrete, brick, and cement, as major traditional bulk building materials, used in Tehran residential buildings. The primary results indicated that multiple linear regression was an apt tool to model the effects of the studied variables on materials wastage. In every developed wastage model, subtractive or accumulative effect of each studied variable was recognized by its coefficient value and sign. The developed models resulted in adjusted R2 values of 0.907, 0.875, 0.920, and 0.790, respectively, for rebar, cement, brick, and concrete waste. Cement, with average wastage of 8.57%... 

For the last couple of decades, researchers/managers have realized that the traditional success criteria known as golden triangle (time, cost, quality) are not adequate measures to align a project with the long term success trend of a company. The perception of project success may differ from one industry to another or from one stakeholder (client, contractor, etc.) to other. Petrochemical projects are of high complexity and a vast variety of parameters needs to be monitored in order to produce on spec products according to the customer requirements and market dynamic changes. To be successful in such complex projects, it is required to be successful in every phase of the project lifecycle.... 

The purpose of this research was twofold; first, it focused on developing quantitative wastage models for rebar, concrete, brick, and cement, as major traditional bulk building materials, used in Tehran residential buildings. The primary results indicated that multiple linear regression was an apt tool to model the effects of the studied variables on materials wastage. In every developed wastage model, subtractive or accumulative effect of each studied variable was recognized by its coefficient value and sign. The developed models resulted in adjusted R2 values of 0.907, 0.875, 0.920, and 0.790, respectively, for rebar, cement, brick, and concrete waste. Cement, with average wastage of 8.57%... 

For the last couple of decades, researchers/managers have realized that the traditional success criteria known as golden triangle (time, cost, quality) are not adequate measures to align a project with the long term success trend of a company. The perception of project success may differ from one industry to another or from one stakeholder (client, contractor, etc.) to other. Petrochemical projects are of high complexity and a vast variety of parameters needs to be monitored in order to produce on spec products according to the customer requirements and market dynamic changes. To be successful in such complex projects, it is required to be successful in every phase of the project lifecycle.... 

For the last couple of decades, researchers/managers have realized that the traditional success criteria known as golden triangle (time, cost, quality) are not adequate measures to align a project with the long term success trend of a company. The perception of project success may differ from one industry to another or from one stakeholder (client, contractor, etc.) to other. Petrochemical projects are of high complexity and a vast variety of parameters needs to be monitored in order to produce on spec products according to the customer requirements and market dynamic changes. To be successful in such complex projects, it is required to be successful in every phase of the project lifecycle.... 

In today competitive world, productivity or lack of it is a major challenge facing the construction industry. The term "productivity" is defined as the amount of output per unit of input. In order to boost productivity in the construction industry, influencing factors should be recognized and improved. Researchers have identified a myriad of factors affecting construction productivity that can be broadly classified as "external" and "internal" factors. In this paper it has been tried to identify and categorize different factors influencing construction productivity. As a result the intended audience is practitioners in the construction industry and project managers who are eager to improve... 

Fuzzy logic is a powerful problem-solving methodology that provides a remarkably simple way to draw definite conclusions from vague, ambiguous or imprecise information. This study is a review on the possibility of developing a tool to help site managers and planners in selecting the most suitable actions for construction productivity improvement in a complex construction site, using fuzzy logic theory. Improving productivity can have a large impact on the overall construction process and consequently result in significant time and cost savings, i.e. minimizing capital cost on the construction projects. Problems associated with productivity measurement such as "lack of a standard productivity...