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本文利用我国的原材料,通过系统的大量试验研究,运用数理统计的方法,和系数叠加原理,提出普通砼和轻骨料砼收缩与徐变的多系数表达式。其中包括在标准状态下砼收缩与徐变的基本方程与环境相对湿度,构件截而尺寸、养护方法、加荷龄期、粉煤灰掺量及砼强度等级一系列影响系数。可用它来确定普通砼及轻骨料砼的收缩值、徐变系数或徐变度等结构计算参数,有实用价值,可供从事砼材料研究、结构设计计算的科技人员参考。
In this paper, we use the raw materials of our country, through a large number of experimental studies of the system, using mathematical statistics methods, and the principle of coefficient superposition, put forward the multi-coefficient expression of shrinkage and creep of ordinary concrete and lightweight aggregates. Including the basic equations of the concrete shrinkage and creep and the relative humidity of the environment under the standard state, the component cut-off dimension, the curing method, the age of loading, the amount of fly ash added, and a series of impact coefficients of the strength of the concrete. It can be used to determine structural calculation parameters such as shrinkage value, creep coefficient, or creep degree of ordinary concrete and lightweight aggregates. It has practical value and can be used as a reference by scientific and technical personnel engaged in the research of germanium materials and structural design calculations.