论文部分内容阅读
我国混凝土构件的设计和质量检验均以标准养护廿八天强度做为根据,这种方法检验周期过长,满足不了施工现场要求。在用硬练法确定水泥标号时,我们试验室推算(人石)28天强度经常采用R_(28)=R_7+K(R_7)~(1、2)的方法来满足现场急需。但自1980年全国实行水泥新标准以后,(人石)强度推算又是一个新的课题。而我局工程施工“三边”的特点又给施工造成很大困难。(人石)配比设计廿八天提供试验标准,远不能满足施工需要。为了解决这个问题,我室八三年下半年在开始进行1小时压蒸法快速测定(人石)强度试验研究的同时又进行了本室所做的(人石)配比设计七天与廿八天强度值的统计分析建立其间的关系式用以推算廿十八天的强度。水泥品种分矿渣硅酸盐
The design and quality inspection of concrete components in China are all based on the standard strength of eight days of conservation. This method has a long inspection period and cannot meet the requirements of the construction site. When using the hard training method to determine the cement label, our laboratory’s calculation (human stone) 28 days intensity often use R_ (28) = R_7 + K (R_7) ~ (1, 2) method to meet the urgent needs of the scene. However, since the implementation of new cement standards throughout the country in 1980, the calculation of the strength of Renshi is a new topic. The “trilateral” features of the construction of our Bureau also caused great difficulties in construction. (Renshi) Matching design Eight days to provide test standards, far from meeting construction needs. In order to solve this problem, in the second half of 1983, we began to conduct a 1-hour pressure steaming method (human stone) strength test study, and at the same time carried out the (people-stone) ratio design made in this room for seven days. The statistical analysis of the daily intensity values establishes the relationship between them to calculate the strength of the eighteen days. Cement type slag silicate