Analysis of concrete mixtures with marble waste material as cement substitution and glass waste as sand substitution on concrete compressive strength

Concrete technology that continues to develop produces high quality concrete which will be a problem of increasing concrete needs. Along with the soaring price of cement as the main ingredient in making concrete, the cost of making concrete is a problem that needs to be sought as a solution for technological development in the field of building construction. Therefore making concrete mixes by suppressing the amount of cement used can be one of the solutions to the problem. The many needs of the Indonesian community for buildings cannot be separated from the increasing demand for building materials. One of them is marble and glass which in the process there is trash or waste from the results of the remains of the pieces or discarded without any prior management. Therefore the need for efforts that can be made to handle the amount of marble or glass waste by utilizing it as a filler in making concrete. This research is to find out the quality of compressive strength of concrete mixed with marble waste. This study used a compressive strength of 20 MPa plan after the study was carried out obtained the average compressive strength of 10% marble concrete waste at 14 days at 22,35 MPa and at 28 days at 23,20 MPa. The average compressive strength value of glass waste concrete 8% at 14 days is 22,64 MPa and at 28 days is 23,48 MPa. Meanwhile, the average compressive strength value of the concrete combination of 10% marble waste + 8% glass waste at 14 days is 22,92 MPa and at 28 days is 23,77 MPa it can be concluded that all concrete variations in marble waste of 10% and glass waste of 8% have increased. This proves that marble and glass waste can be used in certain variations.