Potential Use Of Redash And Marble Chips As An Alternative Base Course Material Through Blending With Crushed Stone Aggregate.

Abstract

The conventional aggregates used in the construction industry today are consumed in enormous quantities annually. Construction costs go up, natural resources are depleted, and the state of the earth's surface continues to deteriorate due to the rising demand for conventional aggregate. Since these base course materials are only widely available in a few regions of the nation, using them everywhere incurs transportation costs and takes time, which causes project delays. The possibility of using RA and MC as an alternative base course material by blending them with CSA was investigated in this study. The mechanical stabilization of the red ash and marble chips and an examination of their physical characteristics were used in a laboratory test; In a laboratory. Nine samples of red ash and marble chips blended with CSA in varying percentages (0, 5, 10, 15, 20, 25, and 30 percent) were examined for this research's investigation. The laboratory test results show that for 100% red ash and marble chips gives; CBR, SG, AIV, ACV, LAA, FI, EI, water absorption and Soundness: 55.4%, 2.38%, 18.20%, 26.34%, 19.69%, 5.59%, 12.09%, 2.5% and 13.80 and 83.6%, 2.63%, 19.70%, 26.41%, 19.75%, 23.2%, 16.9%, 1.24% and 12.22 respectively. Some of these test results meet the ERA standard specification, but the CBR, water absorptions, and soundness test results fall short of the requirements. Overall, the red ash and marble chips cannot individually meet the ERA standard specification; therefore, mechanical stabilization was used to enhance the physical properties of samples. Results are obtained by mixing 20% Red ash, 20% marble chips, and 60% CSA. Are CBR, SG, AIV, ACV, LAA, FI, EI, water absorption and Soundness of 102.5%, 2.55, 14.23%, 19.84%, 7.92%, 18.61%, 20.77% 0.83% and 7.38 respectively. The CBR, water absorption, and soundness all meet the necessary ERA standard specification for GB2 and GB3 materials at this proportion. Therefore, it was advised to use red ash up to 20% and marble chips up to 20% by weight with 60% CSA for the construction of road base courses when they can be found a reasonable distance from a construction site and in areas where the materials are widely available. Road Contractors and other civil engineering professionals can also use this blending percentages for base course construction. Since the laboratory test done for this paper is not enough, I advise a person who want to work his research on this tittle to check again and fill the gap on the test result on this study.