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The amount of HPMC used in practical applications varies depending on the climate, temperature, quality of local ash calcium powder, formula of putty powder and “quality required by customers”. Generally speaking, it is between 4 kg and 5 kg. For example: most of the putty powder in B...Read more »
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One of the biggest differences between dry-mixed mortar and traditional mortar is that the dry-mixed mortar is modified with a small amount of chemical additives. Adding one additive to dry powder mortar is called primary modification, adding two or more additives is called secondary modification...Read more »
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Desulfurization gypsum is the flue gas produced by the combustion of sulfur-containing fuels (coal, petroleum), industrial solid waste produced during the desulfurization purification process, and the hemihydrate gypsum (chemical formula CaSO4· 0.5H2O), the performance is comparable to that of na...Read more »
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Hydroxypropyl methylcellulose (HPMC) mainly plays the role of water retention, thickening and improving construction performance in cement, gypsum and other powder materials. Excellent water retention performance can effectively prevent the powder from drying and cracking due to excessive water l...Read more »
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In recent years, with the continuous development of external wall insulation technology, the continuous progress of cellulose production technology, and the excellent characteristics of HPMC itself, HPMC has been widely used in the construction industry. In order to further explore the mechanism ...Read more »
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The Chinese name of HPMC is hydroxypropyl methylcellulose. It is non-ionic and is often used as a water-retaining agent in dry-mixed mortar. It is the most commonly used water-retaining material in mortar. The production process of HPMC is mainly a polysaccharide-based ether product produced by a...Read more »
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1. Common problems in putty powder Fast drying is mainly due to the amount of ash calcium powder added (too large, the amount of ash calcium powder used in the putty formula can be appropriately reduced) is related to the water retention rate of the fiber, and it is also related to the dryness of...Read more »
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In ready-mixed mortar, as long as a little cellulose ether can significantly improve the performance of wet mortar, it can be seen that cellulose ether is a main additive that affects the construction performance of mortar. The selection of different varieties, different viscosities, different pa...Read more »
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The most important property of cellulose ether is its water retention in building materials. Without the addition of cellulose ether, the thin layer of fresh mortar dries out so quickly that the cement cannot hydrate in the normal way and the mortar cannot harden and achieve good cohesion. At the...Read more »
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Vitamin products are all derived from natural cotton pulp or wood pulp, which are produced through etherification. Different cellulose products use different etherifying agents. The etherifying agent used in hydroxyethyl cellulose (HEC) is ethylene oxide, and the etherifying agent used in hydroxy...Read more »
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Application of hydroxypropyl methylcellulose in construction mortar plastering mortar High water retention can make the cement fully hydrated, significantly increase the bond strength, and at the same time, it can appropriately increase the tensile strength and shear strength, greatly improve the...Read more »
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A. The necessity of water retention The water retention of mortar refers to the ability of mortar to retain water. Mortar with poor water retention is prone to bleeding and segregation during transportation and storage, that is, water floats on the top, and sand and cement sink below. It must be ...Read more »