喷射混凝土的原材料和施作工艺与普通混凝土不同,强度增长规律也不相同。为进行喷射混凝土受力状况的分析,常需对某一龄期的强度作出估计。 一、28天以内的强度增长 按8、16、24、48、168、672小时等6个龄期,各制作3组试件,共18组54块(每组3块)。把同龄期的3组试件的平均抗压强度列 Sprayed concrete raw materials and the application process is different from ordinary concrete, the strength of the law is not the same growth. In order to carry out the analysis of stress conditions of shotcrete, it is often necessary to estimate the strength of a given age. First, the strength growth within 28 days at 8,16,24,48,168,672 hours and other six age groups, the production of three groups of specimens, a total of 18 groups of 54 (3 per group). The same age group of three specimens of the average compressive strength column