Utilization Of Brick Fine Aggregate A Partial Replacement OF Natural Sand Approach

Abstract

Investigation was carried out to study the utilization of brick fine aggregate in concrete as partial Replacement of natural sand. For investigation, first class bricks fine aggregate (Brick Fine Aggregate) were collected from local sources. The brick fine aggregates were tested for specific gravity, absorption capacity, unit weight, and fineness modulus. Cylindrical concrete specimens of diameter 100 mm and length 200 mm were made with sand to aggregate volume ratio (s/a) (0.45), W/C ratio (.50), and cement content (400 kg/m3 ). A total of 6 different cases were considered and a total of 18 concrete specimens were made with different replacement ratios (0%, 10%, 20%, 30%, 40%, and 50%) of natural sand by first class brick fine aggregate (brick fine aggregate). The specimens were tested for compressive strength at 7days and 28 days. The test results of specimens made with brick fine aggregate were compared with the results of specimens made with natural sand, i.e. without brick fine aggregate. The specific gravity and unit weight of brick fine aggregate are much lower than the same for natural sand. In general, with the utilization of brick fine aggregate, the workability of concrete is reduced. Also, the compressive strength of concrete is increased up to 30% of replacement of natural sand by brick fine aggregate. Based on this investigation, it is revealed that brick fine aggregate can be utilized (up to 30% replacement of natural fine aggregate) in concrete without reduction of compressive strength. Utilization of brick fine aggregate as fine aggregate will reduce the demand natural sand and finally will help toward sustainable development of construction materials in Bangladeshn