混凝土強(qiáng)度等級檢測(回彈試驗(yàn))附砼強(qiáng)度換算值

1、 混凝土強(qiáng)度等級檢測(回彈試驗(yàn))3、3、回彈值計算4、4、砼強(qiáng)度的計算 碳化深度修正系數(shù)表4510-20 0.9520-30 0.9430-40 0.9340-50 0.9250-60 0.910.880.860.840.820.800.820.800.780.760.740.770.740.730.720.710.720.700.660.650.640.680.620.600.600.60 應(yīng)按下列修正:r-6.0-5.0-4.0-3.5 rrttmam式中：rm:測區(qū)修正后平均回彈值rtm不同澆筑面的回彈值修r(nóng)rrbt 或mmm404550 nnf2m =s=i=1i 1=n式中：mfs：

2、結(jié)構(gòu)或構(gòu)件測區(qū)砼強(qiáng)度換算值的標(biāo)準(zhǔn)差。3、 結(jié)構(gòu)或構(gòu)件砼強(qiáng)度推定值（ fcu,e f)f砼強(qiáng)度值指定值則取小于 10.0mpa。即f = m -1.645sfccu,ecu 平均回彈值平均碳化深度值 dm(mm)rm00.511.522.5345620.4 10.7 10.5 10.2 22.4 13 12.7 12.4 12 11.4 11 10.7 10.3 10 0.51.52.545620 19.3 18.6 17.9 17.4 16.8 16.4 15.4 14.731.4 25.6 24.8 24.1 2322 21.2 20.5 19.7 18.9 18.4 17.8 16.9 1

3、5.8 0.51.54562625 24.2 23.4 22.5 21.6 20.6 19.4030 29.2 27.8 26.4 25.2 24.241 43.7 42 40.2 3836 34.8 33.2 32.3 31.5 29.7 28.4 27.1 26.2 0.51.52.545633 31.2 29.8 28.5 27.547 45.1 42.6 40.2 38.7 37.2 36.3 35.3 33.3 31.8 30.4 29.438 36.9 34.9 33.3 31.8 30.839 36.8 35.2 33.5 32.558 55.7 52.6 49.6 47.8 4

4、6 44.8 43.6 41.1 39.3 37.5 36.3 1.52.545660 57.8 55.6 54.2 52.7 49.8 47.6 45.4 43.9 58.3 56.1 54.6 53.1 50.2 48 45.8 44.3 58.7 56.5 55 53.5 50.5 48.3 46.1 44.6 59.2 56.9 55.4 53.9 50.9 48.7 46.4 44.9 59.6 57.3 55.8 54.3 51.3 49 46.8 45.3 58.8 57.2 54 51.6 49.3 47.7 59.2 57.6 54.4 52 49.6 48 59.7 58 54.8 52.4 50 48.4 58.5 55.2 52.8 50.3 48.7 58.9 55.6 53.2 50.7 49.1 59.3 56 53.5 51.1 49.4 59.7 56.4 53.9 51.4 49.8 56.8 54.3 51.8 50.1 57.2 54.7 52.2 50.5 57.6 55.1 52.5 50.8 0.51.52.5456 58.4