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In ready-mixed mortar, the addition amount of HPMC is very low, but it can significantly improve the performance of wet mortar and is a major additive that affects the construction performance of mortar. Reasonable selection of cellulose ethers of different varieties, different viscosities, different particle sizes, different viscosity degrees and added amounts will have a positive impact on improving the performance of dry mortar.
VAE Re-dispersible Polymer Powder is dispersed in the gypsum slurry and then forms a film, filling the pores of the slurry and intersecting with the gypsum hydration products to form a three-dimensional network structure, making the gypsum structure more dense.
Lithium carbonate is a carbonate of lithium, with a molecular formula of Li2CO3, a molecular weight of 73.891, a melting point of 720°C, a boiling point of 1342°C, a density of 2.11g/cm3, and a white powder appearance. It is an inorganic compound, colorless monoclinic crystal, slightly soluble in water and dilute acid, and insoluble in ethanol and acetone. It is used as a raw material for ceramics, glass (1552, -81.00, -4.96%), ferrite, etc., and components are sprayed with silver paste. It is used medically to treat depression.
Lithium silicate, also known as lithium water glass, is a compound formed by combining metallic lithium with a silicate structure. The molecular formula is: Li2SiO3. Lithium silicate is an odorless, tasteless, transparent liquid with a pH value of around 11, which is alkaline. Soluble in water and alkaline solutions, but insoluble in alcohol and organic solvents.
Hydroxypropyl methylcellulose is used as a water-retaining agent in cement mortar and retarder for mortar pumping.
The compatibility between polycarboxylate polymer powder and cement is not good, and the concrete mixture is prone to problems such as segregation, bleeding, increased slump loss, and shortened setting time. This makes the concrete mixture unable to be transported and poured normally, reducing the strength of the concrete. and durability.
VAE Re-dispersible Polymer Powder is a water-soluble re-dispersible powder, a copolymer of ethylene and vinyl acetate, with polyvinyl alcohol as a protective colloid.
Interior wall putty powder generally has a viscosity of 100,000. Cement mortar has higher requirements for adjustment, and a viscosity of 150,000 is easy to use. In addition, the most critical function of HPMC is to lock in water, followed by thickening.
Since Portland cement is often used in mortar, it is characterized by low early strength and high late strength.
In building materials, the use of polycarboxylate superplasticizer monomer can effectively improve the working performance and strength of concrete. However, when using polycarboxylate superplasticizer monomer, we also need to pay attention to some issues to ensure its normal use and effect. Here are some issues to pay attention to:
Hydroxypropyl Methyl Cellulose (hereinafter referred to as HPMC) can be divided into instant type and slow-soluble type. Instant hydroxypropyl methylcellulose HPMC refers to the surface treatment using cross-linking agent during the production process, so that HPMC can be dissolved in cold water.
Polycarboxylate Superplasticizer Powder is a variety of polymer organic compounds based on polycarboxylates. It has good water-reducing properties. Polycarboxylate Superplasticizer Powder in powder form is much more convenient from transportation to customer use. Since then, the powder has formed this product development trends.