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本文在总结国内外有关资料的基础上,根据我圈的原材料情况,通过系统的、大量的试验研究,运用数理统计的方法,和系数叠加原理,在我国首次提出普通混凝土及轻骨料混凝土收缩与徐变的多系数表达武。其中包括在标准状态下混凝土收缩与徐交的基本方程,及环境相对湿度、构件截面尺寸、养护方法、加荷龄期、粉煤灰掺量及混凝土强度等级等一系列影响系数,可用它来确定普通混凝土及轻骨料混凝土的收缩值、徐变系数或徐变度等结构计算参数,有较大实用价值。可供从事混凝土材科研究、结构设计计算的技术人员参考。
On the basis of summarizing relevant data at home and abroad, based on the information of the raw materials at home and abroad, this paper firstly proposes the shrinkage of ordinary concrete and lightweight aggregate concrete in China through systematic and extensive experimental research, the use of mathematical statistics methods, and the principle of coefficient superposition. Multi-coefficient expression with creeping force. Including the basic equations of shrinkage and creep of concrete in the standard state, and a series of influence coefficients such as the relative humidity of the environment, the size of the section of the member, the curing method, the age of the filler, the amount of the fly ash, and the strength grade of the concrete. It is of great practical value to determine structural calculation parameters such as shrinkage, creep coefficient, or creep of ordinary concrete and lightweight aggregate concrete. For technical personnel involved in the study of concrete materials and structural design calculations.