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随着结构设计理论与建筑工业的发展,混凝土质量的评定和控制已日益为人们所重视。为了满足及时控制、判定混凝土质量的要求,研究早期预测28天强度的试验方法,就显得十分必要。早在二十年代,美国已开始依据早期加速养护试件的强度推定28天强度的研究应用工作。之后,各国研究发展了各种加速养护及快速测定水灰比、快速分析混凝土组成等以推定28天强度的试验方法。大量的试验研
With the development of structural design theory and construction industry, the assessment and control of concrete quality has been increasingly valued by people. In order to meet the requirements for timely control and determination of concrete quality, it is necessary to study the test method for early prediction of the 28-day strength. As early as in the 1920s, the United States has begun to infer the 28-day-strength research and application work based on the strength of early accelerated curing test specimens. After that, various countries researched and developed various test methods for accelerating conservation, quickly determining the water-cement ratio, and quickly analyzing the composition of concrete to estimate the 28-day strength. A large number of experimental studies