Novel water-resistant gypsum-based self-levelling material
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A gypsum-based, self-leveling technology, which is applied in the field of building materials, can solve problems such as poor surface hardness and poor water resistance, and achieve the effects of improving water resistance, ensuring later water resistance and strength, and improving water resistance and strength
Inactive Publication Date: 2019-10-18
成都宏基建材股份有限公司
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[0005] The purpose of the present invention is to provide a new type of water-resistant gypsum-based self-leveling material to solv
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Embodiment 1
[0033] Take 300kg of α hemihydrate gypsum powder, 150kg of calcium hydroxide powder with a fineness of 300 mesh, 45kg of sodium carbonate, 200kg of silica fume with a particle size of less than 200 mesh, 300kg of washed and dried river sand continuously graded from 40 to 120 mesh, and sodium silicate 20kg of powder, 1.5kg of water reducer, 0.1kg of retarder, 0.4kg of suspending agent, and 1.5kg of defoamer. After mixing, a new type of water-resistant gypsum-based self-leveling material is obtained. Add 200kg of water and stir evenly before construction and testing its performance.
Embodiment 2
[0035] Take 500kg of β hemihydrate gypsum powder, 100kg of calcium hydroxide powder with a fineness of 300 mesh, 30kg of potassium carbonate, 100kg of fly ash with a particle size of less than 200 mesh, 250kg of continuously graded machine-made sand of 40-120 mesh, and 10kg of potassium silicate powder , water reducing agent 2kg, retarder 2kg, suspending agent 0.4kg, defoamer 1.5kg, reinforcing agent 10kg, after mixing, a new type of water-resistant gypsum-based self-leveling material was obtained, and 230kg of water was added to stir evenly before construction and testing its performance.
Embodiment 3
[0037] Take 350kg of β hemihydrate gypsum powder, 125kg of calcium hydroxide powder with a fineness of 300 mesh, 40kg of potassium carbonate, 150kg of slag with a particle size of less than 200 mesh, 350kg of machine-made sand with continuous gradation of 40-120 mesh, and 15kg of potassium silicate powder. Water agent 1.5kg, retarder 1kg, suspending agent 1.0kg, defoamer 1.0kg, reinforcing agent 30kg, after mixing, a new type of water-resistant gypsum-based self-leveling material was obtained, and 210kg of water was added to stir evenly before construction, and its performance.
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Abstract
The invention belongs to the field of building materials, and particularly discloses a novel water-resistant gypsum-based self-levelling material. The self-levelling material comprises the following raw materials in parts by weight: 300-500 parts of semi-hydrated gypsum, 100-150 parts of calcium hydroxide, 30-45 parts of a soluble carbonate, 100-200 parts of active silicon-aluminum powder, 250-450parts of dry sand, 10-20 parts of instant water glass and 2.5-38.5 parts of a concrete additive. According to the self-levelling material provided by the invention, the calcium hydroxide powder is added into the gypsum base material, carbonate radicals are provided for carbonization of the calcium hydroxide by doping the soluble carbonate salt, the calcium hydroxide is promoted to be rapidly carbonized to generate water-insoluble calcium carbonate crystals, so that water resistance of the gypsum base material is quickly improved; and a part of strong alkali is generated while the calcium carbonate crystals are generated, and a combination of the strong alkali and the water glass can effectively promote a polymerization reaction of the active silicon-aluminum powder to generate a high-strength mesh silicon-aluminum tetrahedron, that is, geopolymer cement is generated, so that the later-stage water resistance and strength of the gypsum base material are continued to be improved.
Description
technical field [0001] The invention belongs to the field of building materials, in particular to a gypsum-based self-leveling material. Background technique [0002] In recent years, with the development of society and economy, people's living consumption level has gradually improved, and the requirements for building materials and building quality have also become higher and higher. As a branch of building materials, floor materials are designed to meet people's high-quality life In order to meet the demand, various new floor materials have emerged, such as PVC floor, rubber floor, functional floor, wooden floor, etc. These floor materials require a high base level to achieve a good experience effect. [0003] In traditional ground leveling construction, cement river sand or dry-mixed mortar is generally used for leveling. Although craftsmen have made a lot of efforts and attempts to ensure the flatness of the ground, due to the limitation of the material itself, even skil...
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