C50机制砂高性能混凝土T梁张拉可靠性研究

Research on Tension Reliability of C50 T-beam with High-performance Concrete of Manufactured Sand

采用同条件现场养生的试件对C50机制砂高性能混凝土T梁的7d抗压强度和弹性模量进行大量的试验归纳总结,对T梁张拉后起拱度进行调查统计分析。研究结果表明:采用机制砂配制的C50高性能混凝土用于T梁施工,7d强度大于45 MPa,弹性模量大于2.76×104MPa,均能满足设计及规范要求;T梁7d张拉后起拱度符合设计要求。

A large number of tests on the 7-day compressive strength and modulus of elasticity of C50 T-beam with high-performance concrete of manufactured sand were conducted, and statistical analysis was carried out on the arch degrees of T-beam after the tension. The results show that the 7-day compressive strength of C50 T-beam is higher than 45 MPa, and the modulus of elasticity is above 2.76×10^4 MPa. The two indicators meet the specification requirements, while the 7-day arch degree of T-beam after the tension meets the design requirements.