骨料品种对等强度水工混凝土的性能影响研究  

Effect of Aggregate Variety on Properties of Hydraulic Concretes with Equivalent Strength

作　　者：石妍[1,2] 彭尚仕[1,2] 董芸[1,2] 严建军[1,2] 杨华全[1,2] 

机构地区：[1]长江科学院材料与结构研究所,武汉430010 [2]长江科学院水利部水工程安全与病害防治工程技术研究中心,武汉430010

出　　处：《长江科学院院报》2013年第11期83-85,90,共4页Journal of Changjiang River Scientific Research Institute

摘　　要：为研究骨料品种对等强度水工混凝土的性能影响,选取3个不同骨料品种及大坝工程配合比,进行水工混凝土力学、变形及热物理性能试验。研究表明:混凝土强度等级一致时,不同骨料品种的混凝土变形及热物理性质不同———灰岩混凝土的抗拉强度最大、干缩较低、热物理性能好,且灰岩骨料本身强度适中、易于加工、骨料粒形好、吸水率低,是人工骨料中的首选;白云岩也较理想,但玄武岩混凝土弹性模量高、变形大、热物理性能不佳,不利于大坝混凝土的体积稳定性。The mechanical,deformation and thermo-physical properties of hydraulic concretes with three different aggregates and dam-engineering mix ratios were tested.The results revealed that given equivalent strength,the deformation and thermo-physical properties of concrete with different aggregates were different.Limestone concrete has the highest tensile strength,lower drying shrinkage and good thermo-physical properties.Moreover,limestone is the first choice among artificial aggregates owing to its good grain shape,low water absorption,and moderate intensity which means can be easily processed.Dolomite aggregate is also ideal,but basalt concrete is unfavorable for the volume stability of dam concrete because it has large elastic modulus,big deformation and poor thermo-physical properties.The conclusions provide guidance for the mix design and reasonable selection of aggregate for hydraulic concrete.

关 键 词：骨料品种 水工混凝土 强度等级 干缩 热物理参数 

分 类 号：TV544[水利工程—水利水电工程]