中低强度等级高性能化混凝土地方测强曲线研究

摘要

Due to the incorporation of large numbers of admixture,the surface hardness of the me-dium and low strength grade high-performance concrete to high-performance is decreased,and the nation-al unified strength curve is no longer applicable with the improvement of the preparation technology. Based on the laboratory experiment and field test,verified the national unified test curve is no longer ap-plicable,established medium and low strength grade high-performance concrete rebound strength curve of Hunan area,and the engineering examples prove its are in good agreement.It is conducive to the owners and quality supervision departments to strengthen the monitoring of concrete,also has an important refer-ence value for the improvement of relevant norms of our country.%中低强度等级高性能化混凝土由于大量掺合料的掺入，导致其表面硬度降低，由于配制技术的改进，国家统一测强曲线已不再适用。基于室内实验与现场验证相结合的方法，验证了国家统一测强曲线已不再适用中低强度等级高性能化混凝土，建立了湖南地区中低强度等级高性能化混凝土回弹测强曲线，工程实例证明其吻合良好。有利于业主、质量监督部门加强对中低强度等级高性能化混凝土质量的监控，为我国相关规范的修改完善具有重要的参考价值。