玻化微珠保温混凝土的抗折强度试验研究

Experimental Study on the Flexural Strength of Thermal Insulation Glazed Hollow Bead Concrete

为了研究玻化微珠保温混凝土的抗折强度,设计了玻化微珠保温混凝土和普通混凝土抗折试验标准试件,并对折断后的玻化微珠保温混凝土抗折试件进行抗压试验,获取同一试件的立方体抗压强度。分析了玻化微珠保温混凝土的抗折破坏形态,回归了玻化微珠保温混凝土抗折强度与立方体抗压强度的经验关系式。试验与分析结果表明:玻化微珠保温混凝土与普通混凝土的抗折破坏形态基本一致,破坏均为粗骨料与水泥浆凝胶体间的粘结破坏;玻化微珠保温混凝土的抗折强度略高于普通混凝土;玻化微珠保温混凝土抗折强度与抗压强度关系式可为玻化微珠保温混凝土的结构设计提供理论参考。

Abstract：In order to study the flexural strength of thermal insulation glazed hollow bead concrete, the test specimens of thermal insulation glazed hollow head concrete and common concrete were designed to do flexural test, and the compressive test was conducted on the fracture of thermal insulation glazed hollow bead concrete, to obtain the cube compressive strength for the same specimen. The flexural failure mode of the thermal insulation glazed hollow bead concrete was analyzed. The relation between flexural strength and compressive strength of thermal insulation glazed hollow bead concrete was regressed. The results show that the flexural failure form of thermal insulation glazed hollow bead concrete and ordinary concrete is similar, resulted from the destruction of the cohesion between coarse aggregate and grout gel; The flexural strength of ther- mal insulation glazed hollow bead concrete is slightly higher than that of common concrete; The relation between flexural strength and compressive strength of thermal insulation glazed hollow bead concrete could provide theoretical reference for the structure design of thermal insulation glazed hollow bead concrete.