問(wèn)答題
【計(jì)算題】某一組強(qiáng)度等級(jí)為MU10的燒結(jié)多孔磚的抗壓強(qiáng)度數(shù)值如下:10.65MPa,10.60MPa,9.90MPa,10.46MPa,9.87MPa,12.15MPa,9.54MPa,12.45MPa,9.36MPa,10.10MPa。請(qǐng)計(jì)算并判斷,該組燒結(jié)多孔磚是否合格?
答案:
計(jì)算出強(qiáng)度平值M0=10.9MPa,標(biāo)準(zhǔn)差s=2.07;
標(biāo)準(zhǔn)值M=M0-1.8s=7.2MPa;
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