UTILIZATION OF MAIZE COB AND RICE HUSK ASH IN MANUFACTURING PAVER BLOCK CONCRETE FOR LOW TRAFFIC AREASSunita Kumari, Dhirendra Singhal, Rinku Walia and Anil MundayAbstract This paper highlights the results of a study which was conducted on M35 grade cast concrete paver blocks using rice husk ash (RHA) and maize cob ash (MCA) partial replaced with Ordinary Portland Cement (OPC). The replacement for rice husk ash was fixed at optimum 10% ash and maize cob ash was varied from 2.5 % to 10%. Control mix concrete was prepared without any replacement and only with ordinary Portland cement. The basic compressive strength was compared for both i.e. with the specimens exposed to sulfuric acid, nitric acid, magnesium sulfate, and sodium sulfate at the ages of 28, 60, and 90 days. The test results confirmed the attainment of requirement of compressive strength with 5% MCA and 10% RHA. While less changes were observed in durable properties of MR concrete than control mix concrete. It was concluded that MR concrete can be used in lawns, open area, parking areas, low traffic areas, houses, and for manufacturing of perforated blocks/grass concrete paving / permeable concrete to be used for vegetation purposes. It can provide good resistance against sulfuric acid produced by the decomposition of organic matter and convert into sulfuric acid after reacting with moisture present in the soil. |