【摘要】 本文针对吉安地区预拌混凝土建立回弹测强曲线,研究了不同材料组成、施工及成型工艺的差异因素对回弹测强精度的影响。结果表明本试验混合回归曲线及国家统一测强曲线对本地区不同材料组成及成型工艺的混凝土测强精度存在较大差异,提出了建立本地区测强曲线,应以相对误差最小为目标及考虑卵石、碎石、泵送、非泵送不同情况,以提高曲线测强精度的措施。更多还原

【Abstract】 In view of the strength curve of ready-mixed concrete in Ji’an region based on rebound method,we study the effects of differentiating factor on accuracy of rebound test caused by different materials,different constructions and molding process.The results show that the strength test accuracy of molding process and different material compositions are caused by the mixed regression curve.Furthermore,we set up the strength test curve of the local area and put forward the measures to improve the accuracy of strength test curve aiming at minimizing relative error,with consideration of different situations caused by pebbles,rubbles,pumping or non-pumping.更多还原