胶凝砂砾石强度和弹性模量试验研究

摘要

Cement sand and gravel ( CSG) is a new construction material with low strength and elastic modulus, but in the engineering practice, the strength and elastic modulus are difficult to simultaneously meet the requirements. From four aspects such as cement material type, air content, age and water⁃binder ratio, the elastic modulus and compressive strength were studied and analyzed. Test results show that air content has a greater influence to the elastic modulus, the greater the air content, the smaller the elastic modulus will be, and the air content has little impact on axial compressive strength;Within a certain range, with the increase of water cement ratio, the elastic modulus increases;Limestone powder content can have obvious effect to the decrease of elastic modulus.%胶凝砂砾石是一种低强度、低弹性模量的新型筑坝材料，其强度和弹性模量在工程实际应用中难以同时满足要求。从胶材种类、含气量、龄期及水胶比四个方面，对胶凝砂砾石的弹性模量及抗压强度进行了研究。结果表明：含气量对弹性模量影响较大，含气量越大，弹性模量越小，而含气量对轴心抗压强度影响很小；在一定范围内，随着水胶比的增大，弹性模量增大，当超过一定值后，随着水胶比的增大，弹性模量反而下降；石灰石粉含量对胶凝砂砾石弹性模量的降低起到明显作用。