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采用南京句容采石厂的碎石与卵石进行试验,分析了粗集料表面特征的差异对混凝土强度的影响,并根据混凝土强度所用鲍罗米公式进行了一元线性回归分析,结果表明:粗集料特征系数的取值对普通混凝土配合比的各项计算结果影响不容忽视,如果有条件或长期采用同一种粗集料,建议采用实测的数据,这样可使混凝土配合比设计值更科学合理。
The crushed stone and pebble of Jurong quarry in Nanjing were tested. The influence of the difference of the surface features of coarse aggregate on the strength of concrete was analyzed. The linear regression analysis was carried out according to the Bowron formula used in the concrete strength. The results showed that: The effect of the value of aggregate characteristic coefficient on the calculation results of ordinary concrete mix ratio can not be ignored. If the same kind of coarse aggregate is used conditionally or for a long period of time, it is recommended to use the measured data to make the concrete mix design value more scientific and reasonable .