蒸压加气混凝土砌块抗压强度检测的新思路  

A New Idea for Testing the Compressive Strength of Autoclaved Aerated Concrete Blocks

作　　者：黄佥沛 Huang Qianpei

机构地区：[1]大同市天质建筑工程检测检验有限公司,山西大同037000

出　　处：《江苏建材》2024年第3期39-41,共3页Jiangsu Building Materials

摘　　要：GB/T 11969—2020《蒸压加气混凝土性能试验方法》中抗压强度的检测方法未对含水率低于8%时的试验过程做详细的规定,各个实验室在进行加气块的抗压强度检测时方法不统一。用加水的方式控制加气块含水率是实验室常用的方法,通过对比加气块中部和外部的含水率,可以看出由于操作原因会导致加气块内部水分分布不均匀,致使所测得的抗压强度有所差异。为了避免以上情况,考虑去掉加水控制含水率的过程。假设加气块干燥状态时的抗压强度与固定含水率时的抗压强度存在固定关系,即f_(含)=Kf_(干),只要求出系数K,在以后的试验中,只需测定加气块干燥状态的抗压强度,代入系数即可求得对应含水率的抗压强度,通过分析大量试验数据,证实了新思路的可行性。The test method for compressive strength in GB/T 11969—2020"Test Method for Performance of Autoclaved Aerated Concrete"does not specify in detail the test process when the moisture content is less than 8%,and the methods of each laboratory are not uniform when testing the compressive strength of aerated blocks.By comparing the moisture content of the middle and outside of the aerated block,it can be seen that the internal moisture distribution of the aerated block will be uneven due to operational reasons,resulting in a difference in the measured compressive strength.In order to avoid the above situation,consider removing the process of adding water to control the moisture content.Assuming that there is a fixed relationship between the compressive strength of the aerated block in the dry state and the compressive strength when the moisture content is fixed,that is,f contains=Kf dry,only the coefficient K is required,in the subsequent tests,only the compressive strength of the aerated block in the dry state needs to be determined,and the compressive strength corresponding to the moisture content can be obtained by substituting the coefficient,and the feasibility of the new idea is confirmed by analyzing a large number of test data.

关 键 词：蒸压加气混凝土砌块 抗压强度 含水率 

分 类 号：TU502.6[建筑科学—建筑技术科学]