Research On The Properties Of Mortar In The Crack-Harness Of Aerated Concrete Block Walling

With environmental compatibility and sustainability becoming increasingly important issues in the construction industry, AAC has emerged as the ultimate building material. Its unique combination of superior strength, lightweight, heat-insulating and workability makes the construction process much more efficient, saving both time and labor costs. Due to AAC's unique cell structure and absorbing water propriety, However, There are still many problems, when we adopt ordinary mortar to construct and plasterer ash, such as wall crack, big area of layer of plasterer ash crack and partially hollow drum, even according to present AAC technical specifications, for the actual operation craft is so complicated that It is very to guarantee each preface quality. Engineering and technical personnel need to find out urgently an AAC exclusive mortar that can meet the design need. Under this big background, the text come up with the conceive-to study the behavior of an AAC exclusive affiliate material (building and plaster ring ash mortar), and analyze how it match with AAC brick's characteristics. Consequentially, we can find a practical efficient way for the AAC brick walling to defend crack and hollow drum.The text summarized the situations and factors of AAC brick walling's crack, and in the terms of mechanics, AAC material characteristics, ordinary mortar characteristics, constructing craft, we analyze the principle of AAC brick walling crack and feasibility of AAC brick exclusive mortar research. According to each ingredients (water retaining admixture, polymer, inorganic mineral)' effect to mortar's behaviors (water relentivity, strength, contractility) in exclusive mortar 's composite addition, the text defines each ingredient's quantity scope, then define the mix through cross experiment. We compared the AAC exclusive mortar's behaviors such as water relentivity, compressive strength, binding strength, shrinkage, flexural strength and others to ordinary mortar's ones, It turn out to be that there is much improve in former's behaviors such as water relentivity, compressive strength, binding strength, shrinkage, flexural strength etc, It also shows that the AAC exclusive mortar can improve the crack in AAC brick walling to a certain degree. At last, we study the application technical for AAC exclusive affiliate material and investigate exclusive mortar's application condition in the pilot project, the survey shows that to adopt exclusive mortar's technical scheme is enough to meet design's need. We confine surely that It is a practicable efficient way in harnessing AAC brick walling's crack.