The effect of dry unit weight, suction, and imparted energy on the modulus of a compacted mixture of sand and kaolin
Alternative methods for controlling compaction using intelligent technologies have recently emerged. With these methods, the rollers can measure the modulus and adjust the energy imparted to the soil when the modulus is over or under a specified value. Although this novel method looks promising the effects of dry unit weight, moisture content, matric suction, and the energy used to compact the soil are still not understood very well. In this paper the soil modulus of compacted beach sand and a commercial mixture of kaolin soil were investigated. A non-destructive technique using Bender elements was used to determine the small-strain modulus, whereas the matric suction was evaluated using the filter paper method. The results of the test showed that while the influence of compaction energy on the low moisture content range was clearly evident, at higher moisture contents the role of matric suction seemed more significant.