Construction and demolishing waste (CDW) is being generated in large quantity due to increasing in construction, maintenance activities, demolishing and infrastructure development projects. The CDW consists of reclaimed asphalt pavement, recycled concrete aggregates and crushed bricks. Recycled concrete aggregate and crushed bricks waste are obtained from the demolishing of an existing building, concrete pavement, kerb and block pavements. The generated concrete aggregate waste is not frequently used as recycling material in the construction of a base layer of pavement instead they are used for land fillings without proper recyling. This land fillings are causing pollution of groundwater due to leaching from waste material. The main objective of this study is to investigate the reuse of concrete aggregate in the construction of granular sub-base layer of pavement. The concrete aggregate from construction and demolition waste is crushed into smaller sizes and mixed with natural aggregate in different proportions. In this study, Granular Sub-Base (GSB) grading VI of MoRTH (MoRTH in Specifications for road works and bridges. Ministry of Road Transport and Highways, New Delhi, India 2013) specification was considered. Moisture-density relationship and California Bearing Ratio (CBR) value were evaluated on the prepared aggregates mixes. These tests are carried on the mixes prepared by varying the percentage of recycled concrete aggregates and the results were compared with the test results on the natural aggregate mix. Based on the results obtained from the moisture-density relationship and CBR, it is ascertained that the recycled concrete aggregates have the potential to be used in the construction of pavements GSB layer in normal and in low volume roads.
Reuse of Crushed Concrete in Granular Sub-Base in Pavements
Lecture Notes in Civil Engineering
International Conference on Advances in Civil Engineering ; 2020 May 28, 2020 - May 29, 2020
2021-12-15
8 pages
Article/Chapter (Book)
Electronic Resource
English
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