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实地调查表明各地粉煤灰砖建筑物都发现有不同程度的裂缝。株洲市每年生产1亿块粉煤灰砖,大部分是用于5至6层建筑物。前年我们调查了176幢楼房,共1204万平方米,根据裂缝开展程度不同进行分类:较好的占14%,好的占41.5%,差的占25.6%,较差的占18.2%。北京、通化、武汉也发生类似情况。而且裂缝形式有一定的规律性。裂缝出现的部位和形式主要有以下几种:
Field surveys have shown that cracks in various degrees have been found in fly ash brick buildings. Zhuzhou City produces 100 million fly ash bricks each year, mostly for 5 to 6-story buildings. The year before last year, we investigated 176 buildings, totaling 12.04 million square meters, classified according to the degree of crack development: good accounting for 14%, good accounting for 41.5%, poor accounting for 25.6%, and poor accounting for 18.2%. Similar situations have occurred in Beijing, Tonghua, and Wuhan. And the crack form has a certain regularity. The locations and forms of cracks are mainly the following: