Cellulose ether in the dry mixing mortar grouting material have to add

Dry mixing mortar grouting dry mixing mortar grouting material with a cellulose ether in the dry mix mortar grouting material, cellulose ether content is very low, but can significantly improve the performance of the wet mortar, influencing the performances of mortar grouting material construction is a main add seam an agent. A, the definition of cellulose ether cellulose ether production mainly adopts natural fiber through alkali soluble, grafting reaction ( Etherification) , washing, drying, grinding, etc. Natural fiber as main raw material can be divided into: cotton fiber, cedar, ju wood fiber, etc, their different degree of polymerization, affects the final viscosity of the products. At present, the main fiber manufacturers are using cotton fiber ( Nitrocellulose by-product) As the main raw materials. Cellulose ether can be divided into ionic and nonionic. Ionic salt mainly carboxymethyl cellulose, nonionic, methyl hydroxyethyl methyl cellulose (main Propyl) Cellulose, hydroxyethyl cellulose, etc. Second, the classification of the cellulose in the dry mixing mortar grouting material, due to the ionic cellulose, Carboxymethyl cellulose (salt) In the case of calcium ion exists is not stable, so in for cementing materials such as cement and hydrated lime powder products are rarely used. At home in some places, the use of modified starch as the main bonding materials processing, powder and some indoor use putty, just using carboxymethyl cellulose is shown in figure 5 - salt 1) For thickening the seam an agent. This product is easy to mildew, and not water resistant, is now being phased out gradually. Hydroxyethyl cellulose is also used in some dry powder products, but the market share of the few, is not detailed here. Now, in cellulose ether is mainly used in the dry mixing mortar methyl hydroxyethyl cellulose ether ( MHEC) ( Figure 5 - 2) And methyl hydroxypropyl cellulose ether ( MHPC) ( Figure 5 - 3) , they occupy the market share of more than 90%, and the real proportion of methyl cellulose ether is very low, should this here methyl cellulose ether mainly refers to the MHEC and MHPC.