Abstract
The objective of this project is to determine the grain bulk modulus of sand, as it has not been found directly before. The compressibility of sand has been assumed to be the same as that of quartz, though this has never been proven. The constant under question is being measured for sand from several different locations, each mixed in an enveloping liquid of either castor oil or water. A pressure chamber is used to compress the mixtures up to a working pressure of 2000 psi. As pressure is released, the rate of change of volume with respect to change in pressure is measured. Volume change is measured in a tall glass tube that serves as a graduated cylinder. A pressure transducer is used to monitor changing pressures in the chamber. The compressibility of both castor oil and water was checked, as compared to a sample of stainless steel of known compressibility. The observed ratio of volumes between test fluid and sand sample is then taken into account in order to determine the compressibility of the sample in the enveloping liquid.
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