摘要
通过小浪底工程高强混凝土施工实践和统计分析 ,验证了当混凝土配制强度fcr大于 30MPa时 ,混凝土强度标准差σ随fcr增大而递增仍然比较明显 ,因此不可视σ为常数 ,在进行配制强度计算时 ,应按不同混凝土设计标号采用不同的σ值 ,这样既可保证满足设计要求 ,又能取得较好的经济效益 .
The construction practice and statistic analysis of high-strength concrete in the Xiaolangdi Project show that when the average concrete strength f cr is over 30?MPa, the standard difference of concrete strength σ obviously increases with f cr , thus σ cannot be considered as a constant. For this reason in the calculation of concrete mixing strength, the value of σ should be determined based on different design grade of concrete, in this way, not only the design requirement could be satisfied, but also good economic benefit be achieved.
出处
《水利水电科技进展》
CSCD
2001年第5期44-45,共2页
Advances in Science and Technology of Water Resources
