回弹法检测混凝土强度质量评定

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1、1. 十六个弹击点，去掉三个最大值和最小值，求出回弹算术平均值。2. 当混凝土符合下列条件时可选用本规程提供的统一测强曲线。(1) 符合普通混凝土用材料，拌和用水的标准；(2) 不掺外加剂或仅掺非引气型外加剂；(3) 采用普通成型工艺；(4) 采用符合现行国家标准混凝土结构工程施工质量验收规范规定的模板；(5) 自然养护或蒸汽养护出池后经自然养护7D以上，且混凝土表层为干燥状态；(6) 龄期为 141000D；(7) 抗压强度为 1060MPA3. 当混凝土长期处于潮湿或浸水混凝土；或检测部位曲率半径小于250MM；或粗集料最大 粒径大于60MM；或特种成型工艺制作的混凝土；可制定专用测强度曲

2、线或通过试验进行修 正。附：统一测强度曲线表4. 评定(1) 当该结构或构件测区数少于10个时：强度推定值CU,ECU,MIN(2)当该结构或构件的测区强度值中出现小于 10.0MPA 时：件测区数不少于 10 个或按批量检测时，应按下式计算：/cu,e 4.5MPA；当该批构件混凝土强度平均值不小于25MPA时:S/ccu5.5MPA；驱混凝31 慶换算泊仃肌）竽恰加但平均碳化深度值&仏）伽）nn si n1 S7 n9 S*? ft3片-1s nU.b20.0)0.310.) 20.2)0.510.310 020.410.710.510.2Z0.6n.o10 810 d10 120 8n?

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