Studying the Effect of Adding Different Ratios of White Sand Quartz to the Clay on the General Properties of Normal Brick

Abstract

This research aims to study the effect of adding different ratios of sand on the general properties of the brick when fired at different temperatures from 800 to 11000c. Normal clay is used as a raw material for brick manufacturing which is a kind of heavy ceramics used for building and constructions. Many samples were formed by adding different ratios of sand ( 5, 10, 15, 20, 25) % by semi_dry pressing under pressure of 250 N/mm2 and dried under 110 0C then fired at different temperatures (800 – 900 – 1000 - 1100)0C for two hours soaking time. The results of this study showed that the water absorption increases as the ratios of sand increases for each firing temperature, while it decreases when firing temperature increases for the same rate of addition. This results from increasing porosity as the rate of sand increases 18% for each firing temperature, and decreasing as firing temperature increases for the same rate of addition. It was seen also that the compressive strength decreases 23% as the rate of sand increases for the same temperature because of increasing firing temperature for the same rate of sand addition, this also fits on density.