复合黏度改性剂对C60清水混凝土性能的优化分析

Optimization Analysis of Composite Viscosity Modifier Admixtures on Performance of C60 Fair-faced Concrete

自主研发了一种复合黏度改性剂(CVMA),研究了掺量为0~15%的CVMA对C60桥塔清水混凝土新拌性能、硬化性能和外观质量的影响。结果表明:掺10%的CVMA可降低清水混凝土倒置坍落度筒排空时间56.9%,并提高了混凝土的力学和耐久性能;掺入CVMA可以改善清水混凝土的气泡稳定性、优化气泡结构,从而减少清水混凝土的外观气泡缺陷,同时可抑制色差缺陷,达到清水混凝土外观质量要求。

A composite viscosity modifier admixture(CVMA)was developed to improve performance of C60 fair-faced concrete for bridge pylon.The influence of CVMA content 0~15%on fresh,mechanical properties,durability and appearance quality of fair-faced concrete was investigated.The results show that fresh property is improved as a reduction of 56.9%in flow time from the inverted slump cone with 10%content of CVMA in fair-faced concrete,and improves the mechanical and durability properties.The addition of CVMA can improve the bubble stability of fair-faced concrete,optimize the bubble structure,thus improving the appearance of bubbles and color difference defects of fair-faced concrete,and meeting the appearance quality requirements of fair-faced concrete.