龙江大坝混凝土掺合料选择研究

文中研究比较了掺火山灰和石灰石粉胶凝材料的水化热、胶砂强度,并通过大坝C9025W8F50混凝土性能试验,考察掺合料品种和掺量对混凝土抗拉强度、弹模、极限拉伸值和各龄期抗压强度的影响.得出:石灰石粉基本不参与水化反应,对于设计龄期为28 d的大体积混凝土,采用石粉掺合料效果较好;但是对于设计龄期为90d的大体积混凝土则宜采用火山灰掺合料.

Study on concrete admixtures selection for Longjiang dam

The paper compares the hydration heat and mortar strength of cementitious materials mixed volcanic ash and limestone powder,and analyzes the influence of the variety and amount of admixture to the concrete tensile strength,elasticity moduli and ultimate tension,and compressive strength at every age through the C9025W8F50 concrete performance test of dam.The results is that because the limestone powder is basically not participate in the hydration reaction,the effects of limestone powder admixture and volcan...