Experimental Study On Properties And Mechanical Performance Of Self-compacting Recycled Aggregate Concrete

Along with the rapid growth of civil engineering industry,the amount of concrete construction waste is increasing. The ecological environment will seriously damaged if the construction waste were not treated properly.Owing to the improvement of environmental protection consciousness and the requirements of the scientific outlook on development,the application of self-compacting recycled aggregate concrete,as green construction materia is becoming an appropriate measure to solve the environmental problems.Self-compacting ability makes recycled aggregate concrete more appliable to mere extensive fileds.Based on a series tests on self-compacting recycled aggregate concrete,the mix proportion, workability,mechanical, mechanical properties and shrinkage were studied.The experimental studies conducted in this thesis includes:tests for basic performance of recycle aggregate,i.e.water absorption, apparent density and crush value, and wear test have been conducted. Appropriate self-compacting recycled aggregate concrete was prepared by pre-weting treatment and by adding of water reducer and fly ash.Workability of self-compacting recycled aggregate concrete was evaluated by passing ability tests,flowability tests and segregation resistance tests. Experiments on compressive strength,tensile splitting strength and bond strength of self-compacting recycled aggregate concrete were conducted. In addition, shrinkage tests of self-compacting recycled aggregate concrete were carried out-Based on the test results, the influence of aggregate replacement rate and recycled aggregate types on the performance of self-compacting recycled aggregate concrete were analyzied.