Construction And Demolition Of The Construction Industry

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Introduction 1.1 General Nowadays construction and demolition activity is taken up every other day so that there is need of raw material in the construction industry and need space for dumping the waste in to landfills. Out of 68.8 million Tonnes per year solid waste in India, 25% is of demolition waste. Rapid economic growth leading to urbanisation and industrialisation is producing waste, which is unfavourably affecting the environment. The percentage of India 's population living in cities and urban areas increased from 14% (1947) to 31.16 % (2011).Forecasting for building material need by the housing sector shows a shortage of aggregates to amount of about 55,000 million m3. An additional 750 million m3 of aggregates would be required to achieve the goals of the transportation sector. There is also a huge demand for aggregates in the housing and transportation sectors (for road pavement), but there is a significant gap in demand and supply. Forecasted waste generation during construction is 40 kg per square meter to 60 kg per square meter. Similarly, waste generation during repair work and renovation is estimated to be 40 kg per square meter to 50 kg per square meter. The maximum contribution to waste generation comes from the demolition of structures. Demolition of pucca (permanent) and semi-pucca structures, on average generates between 300kg per for each m2 and 500 kg per for each m2 of waste, respectively. In present scenario, private contractors subtract the waste to low lying land for money or they dump it along the roads in unauthorised manner without care of environment. Out of the total construction demolition waste about 40% is of concrete, 30% ceramic, 5% plastics, 10% wood, 5%metal, & 10% other mixtures. C... ... middle of paper ... ...orption, Specific Gravity, Aggregate Crushing Value, Aggregate Impact Value, workability and compressive strength are done on natural and recycled aggregate. Conclusion from study is as follow: • Compressive strength initially low but after 28 day of curing it’s as same as conventional concrete. • 10mm and 14mm sized RA are better than 20mm sized aggregate. • Workability is lower due to higher water absorption. BY:- 1. Ismail Abdul Rahman Faculty of Civil and Environmental Engineering Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn malasia 2. Hasrudin Hamdam Faculty of Civil and Environmental Engineering Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia 3. Ahmad Mujahid Ahmad Zaidi (Corresponding author) Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia
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