abstract today, due to the rapid growth of population, development of the construction industry is a necessity. all around the world, new subjects such as sustainable development, environmental pollution, conservation of resources, and reduction of co2 emission have become the most important research topics among the scientific societies. in recent years, especially after 1997, new tools were i...

Nanotechnology seems to hold the key that allows construction and building materials to replicate the features of natural systems improved until perfection during millions of years. This paper reviews current knowledge about nanotechnology and nanomaterials used by the construction industry. It covers the nanoscale analysis of Portland cement hydration products, the use of nanoparticles to incr...

The construction industry faces many problems and challenges especially with the construction of housing which are due to the high level of non-value-adding activities (waste) that reduce the overall construction performance and productivity. In recent years, there have been investigations and research on improving the performance of construction. Lean construction is widely known as an effecti...

Construction solid waste has caused serious environmental problems. Reuse, recycling and reduction of construction materials have been advocated for many years, and various methods have been investigated. However, the effectiveness of its applications seems limited. This paper examines rates of reusable and recyclable waste for six major types of building materials: plastic, paper, timber, meta...

A rapid and versatile method for cDNA library construction was developed. It is based on conventional cDNA library synthesis including all enzymatic steps usually required, but is performed on a solid support. The cDNA is immobilised via a biotin residue to streptavidin coupled magnetic beads, which allows rapid and easy to perform changes of buffers and enzymes. Therefore, it combines speed (l...

Quartz is a human carcinogen and a causative agent of silicosis. Exposure levels often exceed exposure limits in the construction industry. The need for effective control measures is high, but the complex structure of the construction industry, the variability in sources of exposure and the frequent changes of worksite makes it difficult to implement even simple and potentially effective contro...

Building industry as one of the greatest industries in Iran comprises a significant share of waste generation in the country. Since a large quantity of the generated construction waste is buried due to the lack of a recycling protocol, it leads to an undesired waste of resources and causes severe environmental issues. This paper provides a study on the problem of material loss/construction wast...

innovation strategy is the basis of success in innovation and performance improvement. this paper represents a model related to the most important innovation strategies which have a significant impact on performance of industries. then, it examines the relationships between innovation strategies and diversity and development of the performance. so, the empirical research was carried out in iran...

background: there is a high prevalence of  occupational injuries due to accidents in construction industries which affect human health. therefore, the exploration and analysis of contributing factors of such accidents can lead to their prevention and the reduction of their consequences. this study was conducted with the aim to identify factors related to occupational injuries and the severity o...