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—— XINLAN NEW BUILDING MATERIALS ——

2023

Special mortar is the key to promoting new wall materials and ensuring engineering quality

With the promotion and application of new wall materials, the research and development of special mortar, a key supporting material for various new Masonry and new walls, has lagged behind. Although the country has organized the preparation of corresponding special (masonry, plastering) mortar industry standards in order to promote small concrete hollow blocks and Autoclaved aerated concrete products, due to the system of disconnection between building materials and construction, products and applications in China, the connection between special mortar and engineering applications is not ideal. Even if "special mortar" is used in some areas, its technology maturity is not in place, The lack of necessary application technical standards support makes the application effect not ideal. At the same time, some counterfeit products that have only undergone a small amount of testing, lack targeted and applicable research on specialized mortar, and have poor quality are flooding the construction market, posing certain risks to the safety and durability of building walls, which must be highly valued.
As we all know, with the vigorous promotion of national energy conservation and emission reduction and wall material innovation, the traditional clay brick masonry is being replaced by concrete hollow blocks, concrete bricks, autoclaved lime sand bricks, autoclaved fly ash bricks and Autoclaved aerated concrete block masonry. Because these new wall materials have many particularities different from ordinary clay bricks, their Masonry must also use mortar suitable for its own performance for masonry and plastering.
Because the surface of Autoclaved aerated concrete products absorbs water quickly, especially when the products are cut by steel wires, the products that are cut and broken form chips (slag) and stick to the surface. When ordinary masonry mortar is plastered on the surface of the products, the water in the mortar is very easy to be "snatched" by the surface of the products that absorb water quickly (masonry surface) and the slag adhering to the surface of the products, which seriously affects the hydration and setting of the mortar, thus reducing the bonding strength of the mortar joints, That is to say, the Shear strength of masonry along the through joint is reduced. Therefore, special mortar for Autoclaved aerated concrete with good workability (water retention, fluidity, viscosity, adsorption), convenient preparation and reasonable price is used to ensure the quality and safety of new Masonry.

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