砼强度换算表(地标)

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1、一、成都地区大流动性泵送砼回弹测强曲线：成都地区大流动性泵送砼回弹测强曲线函数式为fccu＝0.00115R2.892m。曲线平均相对误差σ为±9.8％，相对误差er为±12.3％。达到“规程”规定的误差要求。“规程”规定的“地区和专用测强曲线”的允许误差为：（1）地区测强曲线：平均相对误差σ≤±14.0％相对标准误差er≤±17.0％（2）专用测强曲线：平均相对误差σ≤±12.0％相对标准误差er≤±14.0％成都地区大流动性泵送砼回弹测强曲线的建立，已于1998年1月通过市级技术鉴定。为了对结构安全更为可靠，在应用中进行5

2、％的修正，即fccu＝0.00115R2.892m×0.95。二、回弹测强曲线的应用：大流动性泵送砼回弹法测砼抗压强度的方法，回弹仪技术要求，碳化深度测试，仪器测试角度及测试构件表面性质（即砼浇筑表面和浇筑底面），构件砼强度推定值评定（单个构件或批量检测），均按中华人民共和国行业标准《回弹法检测砼抗压强度技术规程》（JGJ/T23－92）办理。只是砼强度换算值，使用大流动性泵送砼回弹测强曲线计算。为了方便应用，我们对大流动性泵送砼回弹测强曲线进行了制表，以便查用。三、大流动性泵送砼回弹测强曲线的应用范围：大流动性泵送砼回弹测强

3、测区强度换算表，可用于符合下列条件的砼：（1）砼拌合物坍落度≥180mm，并采用泵送工艺浇注的普通砼及高强砼；（2）采用425＃或425＃R或525＃或525＃R的硅酸盐或普通硅酸盐水泥配制的砼；（3）骨料最大粒径≤40㎜的卵石及最大粒径≤31.5㎜的碎石和中砂配制的砼；（4）用高效减水剂或高效泵送剂或缓凝减水剂配制的砼；（5）期为30—90天的砼（6）抗压强度.为32—71Mpa的砼（7）成都地区生产使用的大性流动性泵送砼；-4-四、回弹测区砼强度换算表：平均回弹值Rm测区混凝土强度换算值（Mpa）平均碳化深度Dm(㎜)00

4、.51.01.52.02.53.035.031.930.629.428.227.126.024.935.232.431.129.828.627.526.425.335.433.031.730.429.228.026.925.835.633.532.230.929.628.427.326.235.834.132.731.430.128.927.826.636.034.633.231.930.629.328.227.036.235.133.732.331.029.828.627.436.435.734.332.931.630.32

5、9.127.936.636.334.833.432.130.829.528.436.836.935.434.032.631.330.028.837.037.435.934.433.131.730.429.237.238.136.635.133.732.331.029.837.438.737.235.634.232.831.530.237.639.237.636.134.733.231.930.637.839.938.336.735.333.832.531.238.040.538.937.335.834.333.031.638.

6、241.139.537.936.334.933.532.138.441.740.038.436.935.433.932.638.642.440.739.137.536.034.533.138.842.941.239.537.936.434.933.539.043.641.940.238.537.035.534.139.244.342.540.839.237.636.134.639.444.943.141.439.738.136.535.139.645.643.842.040.338.737.135.639.846.344.44

7、2.640.939.337.736.240.046.945.043.241.539.838.236.6-4-40.247.645.743.842.140.438.737.240.448.446.544.642.841.039.437.840.649.047.045.143.341.639.938.340.849.747.745.843.942.140.538.841.050.448.446.444.642.741.039.441.251.149.147.145.243.341.639.941.451.949.847.845.9

8、44.042.240.541.652.550.448.446.444.542.741.041.853.351.249.147.145.243.441.642.054.151.949.847.845.944.042.342.254.852.650.548.446.544.642