The main component of the naphthalene basis superplasticizer is the sodium salt of naphthalene sulfonic acid formaldehyde condensate, which is widely applied in concrete and cement. The characteristics of sodium naphthalene sulfonate are high water reduction rate, a low impact on the concrete setting time and low air-entraining properties. Because of these [...]
High range water reducer is the key material and essential technical means for preparing advanced cement-based materials. The use of superplasticizer can produce ultra-high-strength concrete with a compressive strength of 120-150MPa, which is far higher than the strength level of cement, which ensuring concrete has good construction performance. At present, the synthesis [...]
Chemical material for silicone oil is increasing crazily nowadays, below is the related material trends. DMC prices continue to rise, making the supply of goods insufficient, monomer manufacturers entertained and accept orders in limited quantities. The superimposed emergencies have caused the downstream products to follow up. It is expected that the supply pressure on [...]
High range water reducer, HRWR, has different names in different countries. Europe and the United States used to call it superplasticizers, SP; Germany named it superverflussigar; In Japan call it air-entraining (AE) high range water reducer. In the development process of concrete technology, the invention and application of superplasticizers are recognized as [...]
Abstract: According to the actual situation there are poor adaptability between water reducing agents and gypsum in the production of plaster board, three types of water-reducing agent are chosen in this subject: lignin, naphthalene and polycarboxylate. Based on the requirements of the production process，effects of three different types of water-reducing agent on setting time, [...]
1. The Function of Gypsum Board Adhesive The production and molding of the gypsum board is the bonding of gypsum board surface paper and gypsum slurry. The surface paper must be firmly bonded to the gypsum board core, so that the gypsum board has a specific strength. The effect and performance of the adhesive [...]
The technical parameters of gypsum board are calculated based on the length of 3000mm, the width of 1200mm, and the thickness of 9.5mm.
Introduction Gypsum building material has excellent fire resistance, air permeability and sound absorption property. The excellent appearance of white color and smooth structure is good for decoration, combined with lightweight and relatively low prices, and gypsum building materials were developing very rapidly in recent years. Currently, the gypsum building material is mainly [...]
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