Polymer cement mortar is actually seen in some houses or other places, but friends are not very familiar with this polymer cement mortar, and our polymer cement mortar chemistry and polymer cement mortar features The scope of use of the advantages, in the end, friends, now look at the introduction of the following article.
1. Introduction of polymer cement mortar
1. Polymer cement mortar is made by mixing cement, aggregate and organic polymer that can be dispersed in water. The polymer may be a homopolymer polymerized from one monomer or a copolymer obtained by polymerizing two or more monomeres.
2. The polymer must be filmed on the cement particles under ambient conditions, and the cement body and the aggregate form a strong bond. The polymer network must have the ability to prevent the occurrence of microcracks and prevent crack propagation.
Second, the chemical principle of polymer cement mortar
Polymer products have been used in cement mortar for many years, from polyvinyl formal adhesives to synthetic emulsions, latex-based organic chemical adhesives, various celluloses, etc., but in practical applications, organic chemical adhesives can be quickly Film formation and strong sealing, can quickly close the micropores of cement, form a "hard shell" phenomenon, and make the cement lose respiratory function, which is not conducive to further hydration and self-maintenance of cement, and the adverse effect on the late strength of cement is also obviously.
Third, the characteristics of polymer cement mortar
In addition to the hydraulic characteristics of cement, the most important advantage is that it adapts to the ecological environment and has ecological functions. Its micro-porous structure helps it to continuously absorb and use the moisture in the environment for self-supporting, in the wall or in the mortar. More water and moisture can also be released to the outside through the fine pores. While releasing moisture and moisture, the decomposed salt and alkali substances can be cleared through the micropores, which can absorb energy and make the wall more Strong, strong and durable, it is also very beneficial to the ecological environment and is an important ecological building material.
Fourth, the advantages of polymer cement mortar
1. It can double the adhesion of cement mortar.
2. It has excellent impermeability, crack resistance and impact resistance.
3, high temperature resistance, good alkali resistance.
4. The product is non-toxic, harmless, non-polluting and environmentally friendly.
Fifth, the scope of application of polymer cement mortar
1. Waterproof and anti-leakage works for all parts of buildings such as exterior wall, roof, toilet room and pool.
2. Waterproof and anti-leakage works for various underground projects such as basements, tunnels, dams and subways.
3, especially suitable for aerated concrete, hollow brick and other porous materials wall anti-leakage surface or brush.
Sixth, the use of polymer cement mortar
1. Bonding surface treatment: The old concrete surface can be treated by artificial chiseling method, sand blasting method or high pressure water jet method to obtain a good bonding surface. When the surface is chiseled or grooved, the depth should not be less than 6mm and the spacing should not be greater than the spacing of the stirrups or 200mm.
2. Plant shear-resistant steel: After the surface is treated, the shear reinforcement is implanted on each reinforcement surface with an electric hammer or a nail gun.
3. Paving steel mesh: Single or multi-layer steel mesh can be laid according to the reinforcement needs. When laying multi-layer steel mesh, the mesh of several layers of steel mesh should be aligned as much as possible. The steel mesh is then fixed by a suitable method (such as with a thin wire).
4, smear (spray) mortar:
(1) Mortar mixing and consistency control: directly add 14% to 15% of water, mix well and use, the consistency should be controlled at 70±10mm.
(2) Application and requirements: After the mortar is mixed, apply it to the surface to be reinforced, and apply force when applying, so that the mortar can be in close contact with the concrete surface. The surface should be napped without initial condensation. The mixed mortar should be used up within 60 minutes. When the temperature exceeds 30 °C, it should be used within 40 minutes.
(3) Maintenance: Watering and moisturizing should be continued for 14 consecutive days after the completion of construction.
The introduction of our polymer cement mortar and the chemical principles, our friends have already made it clear, and we also know that polymer cement mortar has many advantages and its characteristics, and what is the scope of use of polymer cement mortar, our friends Continue to pay attention to the decoration home network and learn more about decoration.
More related wonderful reading:
What is polymer cement waterproof mortar? What are the uses?
What are the methods of using polymer cement based waterproof coatings?
Polymer cement waterproof coating classification, waterproof coating component
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