Polymers anti-cracking mortar

Abstract

The invention provides polymer crack-resistant mortar, which is prepared with 25 to 35 percent of cement, 55 to 65 percent of sand, 5 to 10 percent of pulverized fuel ash, 2 to 4 percent of soluble powdered gum, 0.1 to 0.5 percent of wood fiber, and 0.2 to 0.5 of hydroxypropyl methylcellulose through mixing. All of the indices of the polymer crack-resistant mortar meet the standard requirements of the Material for Exterior Wall Thermal Insulation System of Buildings (DBJ04-234-2005); the distortion resulting from drying shrinkage of the polymer crack-resistant mortar is small; the cohesive strength is high with high crack resistance, placeability and moisture retention; the hardened polymer crack-resistant mortar can be bonded to the wall or other parent materials well, and can prevent internal wall and external wall from cracking. The beating uniformity is high; the quality is stable; and the quality of building construction is guaranteed by adopting the polymer crack resistant mortar for construction.

Description

technical field

[0001] The invention relates to a building dry powder mortar, in particular to an anti-cracking mortar for coating and decorating the surface of a thermal insulation system. Background technique

[0002] With the continuous improvement of people's requirements for the quality, beauty and comfort of buildings, higher requirements are also put forward for building materials. The continuous production and application of new energy-saving wall materials such as aerated concrete, lightweight ceramsite hollow bricks, and hollow fly ash blocks have not only improved the construction quality, but also improved the thermal insulation and air permeability of the wall, and also solved the problem of many environmental issues. However, the currently widely used on-site mixing mortar not only has engineering quality problems such as water leakage, cracks, low bonding strength, and easy peeling, but also has a single function, which can only play the role of wall adhesive...