回弹强度测区混凝土强度换算表
砼强度换算表
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f ccu ＝2.892m。
曲线平均相对误差σ为±％，相对误差er为±％。
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≤±％相对标准误差er≤±％（2）专用测强曲线：平均相对误差σ≤±％相对标准误差er≤±％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％的修正，即f ccu ＝2.892m×。
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/T 23－92）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≤㎜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；四、回弹测区砼强度换算表：注：（1）本表系成都地区大流动性泵送砼回弹法测强测区强度换算表。
（2）表中测区平均回弹值范围为—时，方可查算测区砼抗压强度若Rm小于时按国家统一曲线查表；若RM大于时按计，不得外推。
混凝土强度回弹换算表
回弹法：
回弹法是用一弹簧驱动的重锤，通过弹击杆，弹击混凝土表面，并测出重锤被反弹回来的距离，以回弹值作为与强度相关的指标，来推定混凝土强度的一种方法。
回弹法检测混凝土抗压强度技术规程：
《回弹法检测混凝土抗压强度技术规程》是2011年7月1日中国建筑工业出版社出版的图书，作者是陕西省建筑科学研究院。
内容简介：
本规程的主要技术内容是：1.总则；2.术语和符号；3.回弹仪；
4.检测技术；
5.回弹值计算；
6.测强曲线；
7.混凝土强度的计算。
本规程经住房和城乡建设部以公告第1000号批准、发布，自2011年12月1日起实施。
原《回弹法检测混凝土抗压强度技术规程》JGJ/T23-2001同时废止
目录：
1 总则；
2 术语和符号；
3 回弹仪；
4 检测技术；
5 回弹值计算；
6 测强曲线；
7 混凝土强度的计算。
附录A 测区混凝土强度换算表；
附录B 泵送混凝土测区强度换算表；
附录C 非水平方向检测时的回弹值修正值；附录D 不同浇筑面的回弹值修正值；
附录E 地区和专用测强曲线的制定方法；附录F 回弹法检测混凝土抗压强度报告。
本规程用词说明。
引用标准名录。
附：条文说明。
混凝土强度回弹换算表
混凝土回弹仪的强度换算表如下：
混凝土回弹仪回弹值的计算
1.要计算调查区域的平均回弹值，应从调查区域的16个回弹值中删除三个最大值和三个最小值。
剩余的10个回弹值根据以下公式计算：RM是调查区域的平均回弹值，精确到0.1；RI是第i个测量点的回弹值。
2.在非水平方向的情况下，校正以下公式：RM RI 110 I RM RA，其中RM是非水平检测过程中测试区域的平均回弹值，精度为0.1；RA是非水平状态检测中的回弹校正值，可根据下表查询。
回弹测试仪原理：
混凝土回弹仪是一种弹簧驱动弹头锤并通过弹簧敲击棒敲击混凝土表面而产生的瞬时弹性变形恢复力，使回弹锤可以驱动指针弹回并指示弹跳距离。
回弹值（回弹距离与锤击前锤与杆之间距离的比率，以百分比计算）是与混凝土抗压强度有关的指标之一，可用来估计混凝土的抗压强度。
扩展数据：
有下列情况之一的，应定期维护回弹测试仪：
1.超过2000次弹丸攻击；
2.对测试值有疑问时；
3，钢砧设定值不合格；混凝土回弹仪
混凝土回弹仪的日常维护方法应符合以下要求：
1.松开弹簧锤，取出机芯，然后取下弹簧杆（取出内部的缓冲弹簧）和三部分（弹簧锤，弹簧和弹簧座）；
2.用汽油清洁芯子的所有零件，尤其是中央导杆，子弹锤和弹簧杆的内孔和冲击面。
清洁后，在中心导杆上涂一层薄薄的时钟油或缝纫机油，其他部位不得上油；
3.清洁外壳的内壁，除去水垢，并检查指针的摩擦力应在0.5-0.8n之间；
4.请勿旋转尾盖上的固定调零螺钉。
5.不要制造或更换零件；
6.维护后，应按要求进行校准测试，校准值应为80±2。
管道输送混凝土回弹值强度换算表
管道输送混凝土回弹值强度换算表1. 强度等级对应回弹值
下表列出了不同强度等级混凝土对应的回弹值范围：
2. 回弹值对应强度等级
下表列出了不同回弹值范围对应的强度等级：
3. 使用方法
要使用该换算表，只需测量混凝土的回弹值，并找到对应的回弹值范围，即可确定混凝土的强度等级。
例如，如果混凝土回弹值测量结果为18，根据表格2，可以确定该混凝土的强度等级为C25。
4. 注意事项
- 该换算表适用于管道输送混凝土，对于其他类型的混凝土可能不适用。
- 测量混凝土回弹值时，应按照相关标准和规范进行操作，以确保测量结果的准确性。
- 强度等级和回弹值的对应关系可能会因混凝土配合比、材料特性等因素而略有差异，因此建议在实际工程中进行验证。
以上是管道输送混凝土回弹值强度换算表的内容，希望能对工程师和施工人员在混凝土强度评估方面提供帮助。
参考文献：。
回弹法检测泵送混凝土换算表
附录B 测区泵送混凝土强度换算表表B 测区泵送混凝土强度换算表平均回弹值R m测区混凝土强度换算值ci,cuf（MPa）平均碳化深度值d m（mm）.0.51.01.52.02.53.03.54.04.55.05.5≥61 8.610.0————————————1 8.810.210.0———————————1 9.010.410.210.0——————————1 9.210.610.410.210.0—————————1 9.410.910.710.410.210.0————————1 9.611.110.910.610.410.210.0———————1 9.811.311.110.910.610.410.210.0——————2 0.011.511.311.110.910.610.410.210.0—————2 0.211.811.511.311.110.910.610.410.210.0————2 0.412.011.711.511.311.110.810.610.410.210.0———2 0.612.212.011.711.511.311.010.810.610.410.210.0——2 0.812.412.212.011.711.511.311.010.810.610.410.210.0—2 1.012.712.412.211.911.711.511.211.010.810.610.410.210.02 1.212.912.712.412.211.911.711.511.211.010.810.610.410.22 1.413.112.912.612.412.111.911.711.411.211.010.810.610.32 1.613.413.112.912.612.412.111.911.611.411.211.010.710.5注:表中未注明的测区混凝土强度换算值为小于10 MPa 或大于60MPa 。
超声回弹综合法测区混凝土抗压强度换算表
23.0--10.010.010.110.210.310.310.410.510.624.010.610.610.710.810.911.011.111.111.211.311.425.011.411.411.511.611.711.811.912.012.112.112.226.012.212.312.412.512.512.612.712.812.913.013.127.013.013.113.213.313.413.513.613.713.813.914.028.013.914.014.114.214.314.414.514.614.714.814.929.014.814.915.015.115.215.315.415.615.715.815.930.015.715.815.916.016.216.316.416.516.616.816.931.016.616.716.917.017.117.317.417.517.617.817.932.017.617.717.818.018.118.218.418.518.718.818.933.018.618.718.819.019.119.319.419.619.719.820.034.019.619.719.920.020.220.320.520.620.820.921.135.020.620.820.921.121.221.421.521.721.922.022.236.021.721.822.022.122.322.522.622.823.023.123.337.022.722.923.123.223.423.623.823.924.124.324.538.023.824.024.224.424.624.724.925.125.325.525.739.024.925.125.325.525.725.926.126.326.526.726.940.026.126.326.526.726.927.127.327.527.727.928.141.027.327.527.727.928.128.328.528.728.929.129.342.028.428.728.929.129.329.529.730.030.230.430.643.029.729.930.130.330.630.831.031.231.531.731.944.030.931.131.331.631.832.132.332.532.833.033.245.032.132.432.632.933.133.433.633.934.134.334.646.033.433.733.934.234.434.734.935.235.435.736.047.034.735.035.235.535.836.036.336.636.837.137.448.036.036.336.636.837.137.437.737.938.238.538.849.037.437.637.938.238.538.839.139.439.639.940.250.038.739.039.339.639.940.240.540.841.141.441.751.040.140.440.741.041.341.641.942.242.542.943.252.041.541.842.142.442.843.143.443.744.044.444.753.042.943.243.643.944.244.644.945.245.545.946.254.044.444.745.045.445.746.146.446.747.147.447.855.045.846.246.546.947.247.647.948.348.649.049.321.0-----------4.004.263.984.243.964.223.944.203.924.183.904.163.884.143.844.103.824.083.804.06表C.0.1 测区混凝土抗压强度换算表（卵石）续表C.0.13.864.1222.010.010.010.110.210.210.310.410.510.510.610.723.010.810.910.911.011.111.211.211.311.411.511.624.011.611.711.811.912.012.012.112.212.312.412.525.012.512.612.712.812.912.913.013.113.213.313.426.013.413.513.613.713.813.914.014.114.214.314.427.014.314.414.514.614.714.814.915.015.115.215.328.015.315.415.515.615.715.815.916.016.116.316.429.016.216.416.516.616.716.816.917.117.217.317.430.017.317.417.517.617.717.918.018.118.218.418.531.018.318.418.518.718.818.919.119.219.319.519.632.019.319.519.619.719.920.020.220.320.420.620.733.020.420.620.720.921.021.121.321.421.621.721.934.021.521.721.822.022.122.322.422.622.822.923.135.022.722.823.023.123.323.523.623.824.024.124.336.023.824.024.224.324.524.724.825.025.225.425.537.025.025.225.425.525.725.926.126.226.426.626.838.026.226.426.626.827.027.127.327.527.727.928.139.027.427.627.828.028.228.428.628.829.029.229.440.028.728.929.129.329.529.729.930.130.330.530.841.030.030.230.430.630.831.031.331.531.731.932.142.031.331.531.732.032.232.432.632.833.133.333.543.032.632.833.133.333.533.834.034.234.534.734.944.034.034.234.434.734.935.235.435.735.936.236.445.035.335.635.836.136.436.636.937.137.437.637.946.036.737.037.337.537.838.138.338.638.839.139.447.038.238.438.739.039.339.539.840.140.440.640.948.039.639.940.240.540.741.041.341.641.942.242.549.041.141.441.742.042.342.642.843.143.443.744.050.042.642.943.243.543.844.144.444.745.045.345.651.044.144.444.745.045.445.746.046.346.646.947.352.045.646.046.346.646.947.347.647.948.348.648.953.047.247.547.948.248.648.949.249.649.950.250.654.048.849.149.549.850.250.550.951.251.651.952.355.050.450.851.151.551.852.252.652.953.353.754.020.0-----------21.010.010.110.210.210.310.410.410.510.610.610.722.010.911.011.011.111.211.311.311.411.511.611.623.011.811.911.912.012.112.212.312.312.412.512.624.012.712.812.913.013.113.113.213.313.413.513.625.013.713.813.813.914.014.114.214.314.414.514.64.524.504.484.464.444.424.404.364.344.32续表C.0.14.3826.014.614.714.814.915.015.115.215.315.415.515.627.015.715.815.916.016.116.216.316.416.516.616.728.016.716.816.917.017.117.317.417.517.617.717.829.017.817.918.018.118.218.418.518.618.718.819.030.018.919.019.119.219.419.519.619.719.920.020.131.020.020.120.320.420.520.720.820.921.121.221.332.021.121.321.421.621.721.922.022.122.322.422.633.022.322.522.622.822.923.123.223.423.523.723.834.023.523.723.924.024.224.324.524.624.825.025.135.024.824.925.125.325.425.625.825.926.126.326.436.026.026.226.426.626.726.927.127.327.427.627.837.027.327.527.727.928.128.328.428.628.829.029.238.028.728.829.029.229.429.629.830.030.230.430.639.030.030.230.430.630.831.031.231.431.631.832.040.031.431.631.832.032.232.432.632.933.133.333.541.032.833.033.233.433.733.934.134.334.534.835.042.034.234.434.734.935.135.435.635.836.036.336.543.035.735.936.136.436.636.937.137.337.637.838.144.037.137.437.637.938.138.438.638.939.139.439.645.038.638.939.239.439.739.940.240.540.741.041.246.040.240.440.741.041.341.541.842.142.342.642.947.041.742.042.342.642.943.143.443.744.044.344.548.043.343.643.944.244.544.845.145.445.645.946.249.044.945.245.545.846.146.446.747.047.347.648.050.046.646.947.247.547.848.148.448.849.149.449.751.048.248.548.949.249.549.850.250.550.851.151.552.049.950.250.650.951.251.651.952.352.652.953.353.051.652.052.352.753.053.353.754.054.454.755.154.053.453.754.154.454.855.155.555.956.256.656.955.055.155.555.956.256.657.057.357.758.158.558.820.010.010.110.110.210.310.310.410.510.510.610.621.010.911.011.111.111.211.311.311.411.511.511.622.011.911.912.012.112.212.212.312.412.512.512.623.012.812.913.013.113.113.213.313.413.513.613.624.013.813.914.014.114.214.314.414.414.514.614.725.014.915.015.015.115.215.315.415.515.615.715.826.015.916.016.116.216.316.416.516.616.716.816.927.017.017.117.217.417.517.617.717.817.918.018.128.018.218.318.418.518.618.718.819.019.119.219.329.019.319.419.619.719.819.920.120.220.320.420.54.784.764.744.724.704.684.664.624.604.58续表C.0.14.6430.020.520.620.820.921.021.221.321.421.621.721.831.021.721.922.022.222.322.422.622.722.823.023.132.023.023.123.323.423.623.723.924.024.224.324.533.024.324.424.624.724.925.125.225.425.525.725.834.025.625.825.926.126.226.426.626.726.927.127.235.026.927.127.327.527.627.828.028.128.328.528.736.028.328.528.728.929.029.229.429.629.829.930.137.029.729.930.130.330.530.730.931.131.231.431.638.031.231.431.631.832.032.232.432.532.732.933.139.032.632.833.033.333.533.733.934.134.334.534.740.034.134.334.634.835.035.235.435.635.936.136.341.035.735.936.136.336.636.837.037.237.537.737.942.037.237.437.737.938.138.438.638.939.139.339.643.038.839.039.339.539.840.040.340.540.841.041.244.040.440.740.941.241.441.741.942.242.442.743.045.042.042.342.642.843.143.443.743.944.244.444.746.043.744.044.344.544.845.145.445.645.946.246.547.045.445.746.046.346.546.847.147.447.748.048.348.047.147.447.748.048.348.648.949.249.549.850.149.048.949.249.549.850.150.450.751.051.351.752.050.050.651.051.351.651.952.252.652.953.253.553.951.052.552.853.153.453.854.154.454.855.155.455.852.054.354.655.055.355.756.056.356.757.057.457.753.056.156.556.957.257.657.958.358.659.059.459.754.058.058.458.859.159.559.960.260.661.061.361.755.060.060.360.761.161.561.862.262.663.063.463.820.010.810.911.011.011.111.211.211.311.411.411.521.011.811.912.012.012.112.212.212.312.412.512.522.012.812.913.013.113.113.213.313.413.513.513.623.013.914.014.014.114.214.314.414.514.514.614.724.015.015.115.115.215.315.415.515.615.715.815.925.016.116.216.316.416.516.616.716.816.917.017.126.017.217.317.517.617.717.817.918.018.118.218.327.018.418.518.718.818.919.019.119.219.319.419.528.019.719.819.920.020.120.220.420.520.620.720.829.020.921.021.221.321.421.521.721.821.922.022.230.022.222.322.522.622.722.923.023.123.323.423.531.023.523.723.824.024.124.224.424.524.724.825.032.024.925.025.225.325.525.625.825.926.126.226.45.045.025.004.984.964.944.924.904.884.864.84续表C.0.133.026.326.526.626.826.927.127.227.427.627.727.934.027.727.928.028.228.428.528.728.929.029.229.435.029.229.429.529.729.930.030.230.430.630.830.936.030.730.931.031.231.431.631.832.032.132.332.537.032.232.432.632.833.033.233.333.533.733.934.138.033.733.934.134.434.634.835.035.235.435.635.839.035.335.535.836.036.236.436.636.837.037.237.540.037.037.237.437.637.838.138.338.538.738.939.241.038.638.839.139.339.539.840.040.240.540.740.942.040.340.540.841.041.241.541.742.042.242.542.743.042.042.242.542.743.043.343.543.844.044.344.544.043.744.044.344.544.845.045.345.645.846.146.445.045.545.846.146.346.646.947.147.447.748.048.246.047.347.647.948.248.448.749.049.349.649.950.247.049.249.449.750.050.350.650.951.251.551.852.148.051.051.351.651.952.252.552.853.253.553.854.149.052.953.253.553.954.254.554.855.155.455.856.150.054.855.255.555.856.156.556.857.157.557.858.151.056.857.157.557.858.158.558.859.259.559.960.252.058.859.159.559.860.260.560.961.261.661.962.353.060.861.261.561.962.262.663.063.363.764.164.454.062.863.263.664.064.364.765.165.565.866.266.655.064.965.365.766.166.566.867.267.668.068.468.820.011.711.811.811.912.012.012.112.212.212.312.421.012.712.812.913.013.013.113.213.313.313.413.522.013.813.914.014.114.214.214.314.414.514.514.623.015.015.115.115.215.315.415.515.615.615.715.824.016.116.216.316.416.516.616.716.816.917.017.125.017.317.417.517.617.717.817.918.018.118.218.326.018.618.718.818.919.019.119.219.319.419.519.727.019.920.020.120.220.320.420.620.720.820.921.028.021.221.321.421.621.721.821.922.022.222.322.429.022.622.722.822.923.123.223.323.523.623.723.830.024.024.124.224.424.524.624.824.925.025.225.331.025.425.525.725.826.026.126.226.426.526.726.832.026.827.027.227.327.527.627.827.928.128.228.433.028.428.528.728.829.029.229.329.529.629.830.034.029.930.130.230.430.630.730.931.131.231.431.635.031.531.631.832.032.232.432.532.732.933.133.336.033.133.333.433.633.834.034.234.434.634.834.95.305.285.265.245.225.205.185.165.145.125.10续表C.0.137.034.734.935.135.335.535.735.936.136.336.536.738.036.436.636.837.037.237.437.637.838.038.238.539.038.138.338.538.739.039.239.439.639.840.040.340.039.840.140.340.540.741.041.241.441.741.942.141.041.641.942.142.342.642.843.043.343.543.844.042.043.443.743.944.244.444.744.945.245.445.745.943.045.345.545.846.046.346.646.847.147.347.647.944.047.247.447.748.048.248.548.849.049.349.649.845.049.149.349.649.950.250.550.751.051.351.651.946.051.051.351.651.952.252.552.853.053.353.653.947.053.053.353.653.954.254.554.855.155.455.756.048.055.055.355.655.956.356.656.957.257.557.858.149.057.157.457.758.058.458.759.059.359.660.060.350.059.159.559.860.160.560.861.161.561.862.262.551.061.261.661.962.362.663.063.363.764.064.464.752.063.463.764.164.564.865.265.565.966.366.667.053.065.565.966.366.767.067.467.868.268.568.969.354.067.768.168.568.969.369.7-----55.070.0----------20.010.110.210.310.310.410.510.610.710.810.911.021.010.810.911.011.111.211.311.411.511.611.711.822.011.511.611.711.811.912.012.112.212.312.512.623.012.312.412.512.612.712.812.913.013.113.313.424.013.013.213.313.413.513.613.713.814.014.114.225.013.813.914.114.214.314.414.514.714.814.915.026.014.614.714.915.015.115.215.415.515.615.815.927.015.415.515.715.815.916.116.216.316.516.616.828.016.216.316.516.616.816.917.117.217.417.517.629.017.017.217.317.517.617.817.918.118.218.418.530.017.918.018.218.318.518.618.819.019.119.319.431.018.718.919.019.219.419.519.719.920.020.220.432.019.619.719.920.120.320.420.620.820.921.121.333.020.420.620.821.021.121.321.521.721.922.122.234.021.321.521.721.922.122.222.422.622.823.023.24.003.983.963.943.90 3.923.883.86表C.0.2 测区混凝土抗压强度换算表（碎石）3.843.823.80注：1、表内未列数值可采用内插法求得，精确至0.1MPa；2、表中V a （km/s）为修正后的测区声速代表值，R a 为修正后的测区回弹代表值3、采用对测和角测时，表中Va用V代替；当在侧面水平回弹时，表中Ra用R代替4、f c cu （MPa）为测区混凝土抗压强度换算值。
测区混凝土强度换算表
测区混凝土强度换算表
续表
续表
续表
续表
续表
泵送混凝土测区混凝土强度换算值的修正值
注：表中未列入的f c i cu,值可用内插法求得其修正值，精确至。
非水平状态检测时的回弹值修正值
注：① Rma小于20或大于50时，均分别按20或50查表；
2 表中未列入的相应于Rma的修正值Rma，可用内插法求得，精确至。
不同浇筑面的回弹值修正值
续表
注：1 R t m或R b m小于20或大于50时，均分别按20或50查表；
2 表中有关混凝土浇筑表面的修正系数，是指一般原浆抹面的修正值；
3 表中有关混凝土浇筑底面的修正系数，是指构件底面与侧面采用同一类摸板在正常浇筑情况下
的修正值。
4 表中未列入的相应于R t m或R b m的R t
和R b a值，可用内插法求得，精
a
确至。
回弹值计算
非水平方向检测混凝土浇筑面时，应按下试修正：
Rm=Rmα+Raα
式中Rmα——非水平状太检测时测区的平均回弹值，精确至；
Raα——非水平状太检测时回弹修正值。
水平方向检测混凝土浇筑顶面或底面时，应按下列公式修正：
式中R t m、R b m——水平方向检测混凝土浇筑表面、或底面时，测区的平均回弹值，精确至。
R t a、R b a——混凝土浇筑表面、底面回弹值的修正值。