Evaluation of the compressive strength of concrete sing building rubbles as coarse aggregates and bamboo leaf ash as a partial substitute for cement

Abstract

Civil engineering infrastructure needs to be maintained, repaired, and demolished on a regular basis. This causes significant garbage accumulations, additional costs, and environmental problems. Thus, it is an effective approach to use agricultural waste like bamboo leaf ash (BLA) and recycled aggregates (RCA), a construction waste, to alter the use of natural resources that create a risk to the environment. This study is intended to show the lab analysis result of physical properties of RCA, and slump test. In addition, this research also aims to evaluate and compare the compressive strength of the conventional sample, a concrete mix containing 100% Recycled Concrete Aggregates (RCA), the 10% Bamboo Leaf Ash (BLA) concrete sample mix, and the sample mix having both 100% RCA and 10% BLA; cured in both fresh water and marine water for 7, 14 and 28 days. This paper describes the procedure for gathering the materials and producing the cylindrical samples with different control of mixtures. The researchers also discussed the influence and workability of the RCA and BLA after being cured in freshwater and saltwater. A total of 240 samples were created and analyzed in this study. Hence, after comparing the results, a mixture with 10% BLA has the best compressive strength among all other mixes due to the presence of high silica of BLA and the influence of calcium chloride from seawater after being cured for 28 days. RCA can be utilized in construction projects with the proper size of the aggregates and water-cement ratio.