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首页> 外文会议>SP-228; International Symposium on Utilization of High-Strength/High-Performance Concrete vol.1; 20050620-24; Washington,DC(US) >The Correlation between the Water/Cementitious Material Ratio and HPC Compressive Strength
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The Correlation between the Water/Cementitious Material Ratio and HPC Compressive Strength

机译：水胶凝材料比与HPC抗压强度的相关性

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摘要

The water/cementitious material ratio (w/cm) remains an essential, descriptive statistic fortoday's increasingly complex HPC mixtures. The water/cement ratio (w/c) is also useful. A sample of 125 high performance concrete (HPC) mixtures of various materials and proportions was fitted with linear regression models relating compressive strength at ages of 1, 28 and 56 days to the w/cm and/or w/c. It was observed that strength generally increased as the w/cm or w/c was lowered. But linear regression models using a single independent variable, either the w/cm or w/c, failed to return a coefficient of determination, R~2, more than 0.535. It was learned that the w/ c provides a stronger indication of strength at 1 day. By 28 and 56 days, because of pozzolanic activity, the w/cm becomes a better indication of strength. Multiple linear regression models using both the w/cm and w/c capture more of the variability in the data.
机译：水/胶凝材料之比（w / cm）仍然是当今日益复杂的HPC混合物的基本描述性统计数据。水/水泥比（w / c）也是有用的。用各种材料和比例的125种高性能混凝土（HPC）混合物的样本拟合线性回归模型，该模型将1、28和56天龄下的抗压强度与w / cm和/或w / c相关。观察到，强度通常随着w / cm或w / c降低而增加。但是使用单个独立变量w / cm或w / c的线性回归模型无法返回确定系数R〜2，大于0.535。据了解，w / c在1天时提供了更强的强度指示。到28天和56天，由于火山灰活动，w / cm成为强度的更好指示。同时使用w / cm和w / c的多个线性回归模型可以捕获更多数据变异性。

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