骨料级配及养护方式对胶凝砂砾石强度的影响
Fly Ash Comprehensive Utilization(2020)
Abstract
胶凝砂砾石(CSG)作为一种新型筑坝材料,在物理力学性能上介于砂砾石与混凝土之间.为研究骨料级配及养护方式对胶凝砂砾石抗压强度的影响,开展了胶凝砂砾石立方体试块的室内压缩试验.试验结果表明:细骨料恒定,粗骨料级配越细,胶凝砂砾石的抗压强度越高;粗骨料恒定,细骨料级配越粗,胶凝砂砾石的抗压强度越高.当胶凝砂砾石含水率高于3.5%时,其抗压强度快速衰减,含水率由2.1%增长到3.5%,抗压强度损失6.5%,含水率由3.5%增长到4.7%,损失率达到16.3%.在工程应用中,应注意控制其含水率不能过高.
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