Aerated concrete equipment products should pay attention to the cutting surface quality

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Current, aac prodution line manufacturers in the production of aerated brick products, often only pay attention to product after cutting, long, wide, high dimensional accuracy, because it is relevant departments of detection and evaluation of quality indicators for product hard, and the cutting quality is indifferent. However some products, although the size is precise, other mechanical indexes also meet the requirements of first-class, however, due to the cutting surface has some disadvantages, which appear in the application process of many beat all quality issues. From the application situation of the century, product cutting quality than the product dimension precision is much more important, its shortcoming is mainly embodied in the two:

1 product cutting surface in the presence of severe scaly residue layer

This residue layer is the impact of the masonry and plastering quality main hidden dangers, due to debris layer, forming block and mortar adhesive barrier layer. Test surface, the residue layer surface surface layer of mortar, mortar adhering to product base area, only for a total area of about 40%; at the same time, mortar water will be absorbed a lot of residue layer, so that the mortar water was lost the necessary condition, so the masonry wall soon appeared many along the seam ash crack, painted wall hollowing, cracking, can produce finishes off the skin, a great impact on the promotion and application of aerated concrete. For this kind of abuse, some manufacturers to strengthen process management, strict control of billet cutting time, and using high strength and extra fine wire, has received the good effect.

2 product oil surface affect the existence of aerated concrete block in the promotion and application of

Due to the production of aerated concrete engineering used mold oil, thereby forming a gas product oil, the oil surface of water repellency, influence the product and mortar bond. On aerated concrete block by block, the bottom surface close to the die bottom, so are the oil, and the oil surface in masonry was just in a vertical seam, this is block wall all seams are not up to the idea of bonding effect, and is the main reason of false behavior. Therefore, in the masonry mechanical test crack at first are all vertical joint. Experiments show that this kind of cease to exist except in name, vertical slits that masonry axial compressive strength will be reduced about 27%. In addition, because the vertical seam lost bonding, tensile, bending calculation in masonry, is not like that of masonry masonry used along the teeth break strength calculation, just along the masonry walls strength was considered. Notes along the seam strength generally only slot strength of 1 / 2, so that is not conducive to the promotion and application of aerated concrete. And for the near side of the block die, due to the difficult oil surface plastering. Investigation discovery, a little wall finishes, hollowing cracking occurred in the oil, the oil surface without treatment will be an obstacle in the application of products. It is reported, some countries had to take measures, namely to products, six aspects of the implementation of peeling, to ensure the applied quality of aerated concrete.