Light high-strength heat-preservation plastering gypsum mortar and preparation method thereof

Abstract

The invention discloses light high-strength heat-preservation plastering gypsum mortar and a preparation method thereof. The gypsum mortar comprises the following components in parts by weight: 45-70 parts of gypsum powder, 5-8 parts of active magnesium oxide, 1-1.6 parts of magnesium sulfate, 9-40.25 parts of a mineral retarder, 0.3-0.9 part of a mineral thixotropic agent, 3-5.5 parts of a water retention thickener, 4.5-18 parts of glass beads and 40-70 parts of water. The mineral retarder disclosed by the invention not only can prolong the setting time of the gypsum mortar, but also can play a role in enhancing the strength of the gypsum mortar and improving the waterproof performance of the gypsum mortar, so that the problem that the strength of the gypsum mortar is reduced by using salt and protein retarders is avoided. The gypsum mortar also uses a mineral thixotropic agent magnesium aluminum silicate, so that the construction performance of the gypsum mortar is improved; and the active magnesium oxide and magnesium sulfate are hydrated to generate a magnesium cementing material, so that the strength of the gypsum mortar is improved. The invention further provides a preparation method of the light high-strength heat-preservation plastering gypsum mortar.

Description

technical field [0001] The invention relates to the technical field of building plastering materials, in particular to a light-weight, high-strength thermal insulation plastering gypsum mortar and a preparation method thereof. Background technique [0002] Plastering gypsum, as an ecological and environmentally friendly plastering material for interior walls and top surfaces of buildings, has attracted people's attention after the country implemented the energy-saving and emission-reduction plan. Compared with traditional cement plastering materials, plastering gypsum is widely used because of its light weight, no hollowing and cracking, good hygroscopicity, good volume stability, and excellent fire resistance. The dry density of light plastering gypsum is below 1000kg / m3. Compared with ordinary plastering gypsum, the use of lightweight plastering gypsum will have a lower density, and low-density materials also have lower thermal conductivity. The thermal conductivity of ce...

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Problems solved by technology

The Chinese invention patent application with the publication number CN109437797A discloses a slag micropowder modified phosphogypsum mortar, which uses industrial solid waste phosphogypsum as the main raw material, slag micropowder and Portland cement as the activator, and utilizes the high activity and high According to the characteristics of specific surface area, a kind of slag micropowder modified phosphogypsum mortar with flexural and compressive strength up to the standard is prepared, but whether its setting time and construction performance can meet the industrial operation needs further research

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