Research on Dynamic Modulus of Lime-Fly Ash Aggregate Mixture

This paper presents an experimental study on the development of dynamic modulus and resilient modulus test of lime-fly ash aggregate mixture (LAA). Mixture was designed and unconfined uniaxial compression tests were conducted at different curing ages. Mixtures curing for 180 days were selected to do dynamic test and resilient test. Test results indicated that LAA dynamic modulus was quite different from resilient modulus, having different stress dependent behavior and being more than 10 times higher than resilient modulus. LAA dynamic modulus had stress and loading velocity dependence, decreasing with the increase of stress and increasing with the increase of loading frequencies and LAA resilient modulus had obviously stress dependence, increasing with the increase of confining stress and deviator stress.