Abstract
Two soil samples from Agartala were studied for their suitability for high strength bricks. The soils are highly siliceous in nature and contain illitic group of clay minerals. Bricks from these soils crack during firing. Paving bricks of 500–520 kg/sq cm strength, 4 to 5 per cent water absorption and possessing high abrasion resistance can be developed from these soils at a firing temperature of 1050°-1100°C and at a controlled heating and cooling rate of 20°C/hour. Quartz inversion and overall expansion are considered responsible for cracking in bricks.
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