BASIC RESEARCH ON THE USE OF DECOMPOSED GRANITE SOIL AS FINE AGGREGATE IN CONCRETE

Abstract

The density of absolutely dry conditions, the clay lump content, and organic impurity content of decomposed granite soil met all the quality standards for fine aggregate. Soundness by the use of chloride and standard sieve 75μm passing content, in contrast, did not meet all of the standards. The coefficient of water absorption met the standard for decomposed granite soil of Li≤2.5%.
Concrete compression tests were performed on two types of fine aggregate grain size distributions with three water-cement ratios. Results showed that the water-cement ratio had a greater effect than the grain size distribution on the compressive strength of the concrete.