Properties of Brick Waste as Coarse Aggregate Material in Concrete

Abstract

Peoples around Jimma, Ethiopia use Brick waste as aggregate material traditionally. This is mainly due to the availability of Brick and shortage of coarse aggregate material in the area. However, this material property was not studied and its replacement percentage was not known. To reach on conclusion, Brick wastes were collected from three different categories, which were manufactured in the same area. The first one was Brick waste collected from eighteen years old demolished building, the second type was broken on production site and the third type was broken at sellers hand at time of transportation or poor handling. The materials collected were broken manually to maximum aggregate size of 25mm. To minimize the moisture content, the samples were exposed to sun. Batching and mixing of materials was conducted for percentage replacement of 0% to 35% in 5% range of brick waste. Due to high water absorption capacity, Brick waste replaced concrete was less workable. 7^th day and 28^th day compressive strength result shows, 25% of 18years old and Broken on sellers hand Brick waste type can be used as an aggregate for C25 concrete; while 20% of those broken at production site type can be used on structure.