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- 混凝土与制品
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高石粉机制砂高性能混凝土的制备与工程应用
作者：余尚和1，周孝军2，梁远博3，李胜4，赵艺程4
（1.四川公路桥梁建设集团有限公司，四川 成都 610041；2.西华大学 土木建筑与环境学院，四川 成都 610039；
3.武汉理工大学 硅酸盐建筑材料国家重点实验室，湖北 武汉 430070；4.四川交通职业技术学院，四川 成都 611130）
摘要：探讨了降粘剂种类和引气剂掺量对高石粉机制砂混凝土拌合物流动性、粘聚性，以及硬化混凝土抗压强度、表观质量的影响。结果表明：采用910型降粘母液且引气剂掺量为0.03%时，混凝土的工作性能、强度及外观效果较好。通过配合比优化设计，掺专用外加剂，制备出工作性能、力学性能与耐久性能满足设计与施工要求的机制砂高性能混凝土，在叙古高速公路桥梁工程的墩柱、预制梁与现浇梁中广泛应用，取得了良好工程效果。
关键词：高石粉机制砂；混凝土；工作性能；力学性能；耐久性能；外加剂
中图分类号：TU528 文献标识码：A 文章编号：1001-702X（2018）10-0012-03
Preparation and engineering application of high performance concrete
with high stone powder manufactured sand
YU Shanghe1，ZHOU Xiaojun2，LIANG Yuanbo3，LI Sheng4，ZHAO Yicheng4
（1.Sichuan Highway Bridge Construction Group Co. Ltd.，Chengdu 610041，China；
2.School of Civil Engineering，Architecture and Environment，Xihua University，Chengdu 610039，China；
3.State Key Laboratory of Silicate Materials for Architectures，Wuhan University of Technology，Wuhan 430070，China；
4.Sichuan Vocational and Technical College of Communications，Chengdu 611130，China）
Abstract：The effects of viscosity-reducing agent and air-entraining agent on fluidity and cohesiveness of concrete mix，and compressive strength，apparent quality of hardened concrete were discussed. The results show that，when the 910 type viscosity-reducing agent was used in water reducer，and air-entraining agent reached 0.03%，the specimens have good working performance，high strength and excellent appearance effect. Through mixing ratio optimization design，and adding special admixtures，manufactured sand high performance concrete with outstanding work performance，mechanical properties and durability were prepared，which fully meet the design and construction requirements. They have been widely used in bridge piers，prefabricated beams and cast-in-situ beams on Xuyong to Gulin highway，and achieved good engineering results.
Key words：high stone powder manufactured sand，concrete，working performances，mechanical properties，durability，admixture