The Effect Of Recycled Aggregate Concrete Incorporating Waste Paper Sludge Ash As Partial Replacement Of Cement.

Malaysia is facing serious challenges in dealing enormous quantities of waste paper sludge produced in the country every year. This enormous quantity causing major economic problems and environmental problems over the paper and board industry. In order to confront with the economic problems associated with waste disposal costs, which make up almost half of the cost of wastewater treatment, there is a need to provide a viable solution to the reuse of waste and by reducing the use of natural resources. Hence, a comparative analysis of the experimental results novel properties of fresh and hardened concrete with recycled concrete aggregates (RCA) with different substitution of waste paper sludge ash (WPSA) as a partial substitute for cement is presented in the paper. Recycled aggregates is made by crushing the waste concrete cube laboratory tests. Recycled aggregate is made by crushing the concrete waste at laboratory. Utilize of WPSA and RCA is estimated to produce significant gains in strength performance (determine the strength characteristics of concrete structures) and properties of workability and water absorption for each series of mixed. Therefore, the application of those testing method were measured the quality of concrete, so that they can perform satisfactorily as structural element. The findings demonstrated that the WPSA and RCA seems to contribute to the favourable concrete compressive strength. [ABSTRACT FROM AUTHOR]