High Water Retention Agent Construction Grade HPMC Used in Drymix MortarJune 7th 2023
I don’t know if you know about it. As a kind of cellulose, Hydroxypropyl Methyl Cellulose plays a non-negligible role in people’s daily production and life. Among them, its water retention effect is worthy of praise, then you know What methods can be used to effectively improve the water retention effect of cellulose?
Hydroxypropyl Methyl Cellulose in dry powder mortar, the addition of cellulose ether is very low, but it can significantly improve the performance of wet mortar, which is the main additive that affects the construction performance. At present, the cellulose ether used in cellulose in dry powder mortar is mainly cellulose ether (HPMC).
Cellulose mainly plays a role in water retention, thickening and improving construction performance in dry powder mortar. Hydroxypropyl Methyl Cellulose HPMC does not participate in any chemical reactions and is used only as a supplement. Putty powder adds water to the wall. This is a chemical reaction. As a new substance is formed, putty powder is spread from the wall on the wall, ground into a powder, and then used because it has formed a new substance (calcium carbonate). The main components of gray calcium powder are: Ca (OH) 2, CaO and a small amount of CaCO 3 in water and air, CaO + H 2 O = Ca (OH) 2-Ca (OH) 2 + CO 2 = CaCO 3 + The mixture of H 2 O ash calcium forms CO 2 in CO 2, while HPMC only retains water to help the reaction of ash calcium. The ash calcium itself does not participate in any reaction.
High-quality Hydroxypropyl Methyl Cellulose can be evenly and effectively dispersed in cement mortar and gypsum-based products, and seals all solid particles and forms a wetting film. The water in the matrix is gradually released over a long period of time and hydrates with the inorganic cementitious material. Ensure the bond strength and compressive strength of the material.
Therefore, in high-temperature summer construction, in order to achieve water retention, a sufficient amount of high-quality HPMC products must be added according to the formula. Otherwise, excessive drying will result in insufficient hydration, reduced strength, cracking, hollowing and shedding. Problems also increase the difficulty of construction personnel. As the temperature decreases, the amount of HPMC added can be gradually reduced, and the same water retention effect can be achieved.
After reading the introduction above, did you suddenly realize it? There is still this operation! Actually, wanting to improve the water retention effect of Hydroxypropyl Methyl Cellulose is far more than this method, more convenient, efficient and effective methods Waiting for everyone to discover it!