Method for evaluating coating rate of plastering gypsum

Abstract

The invention discloses a method for evaluating the coating rate of plastering gypsum. The evaluation method comprises the steps of testing and calculating a theoretical coating rate St of 1 ton of plastering gypsum; and according to the theoretical coating rate St of 1 ton of plastering gypsum and the loss rate S0 of the slurry in the construction process, calculating the actual coating rate S of1 ton of plastering gypsum according to the formula S = St * (1-S0). In the formula, S is the actual coating rate of 1 ton of plastering gypsum, and the unit is square meter / centimeter * ton; St is the theoretical coating rate of 1 ton of plastering gypsum, and the unit is square meter / centimeter * ton; and S0 is the loss rate of the slurry in the construction process, and the unit is %. According to the evaluation method for the coating rate of plastering gypsum, the theoretical coating rate is tested and calculated through a standard controllable method, the obtained theoretical coating rate value is accurate and reliable, the using amount and cost of materials can be calculated more reasonably, and a reliable comparison basis is provided for market popularization of products.

Description

technical field [0001] The application relates to the field of building materials, in particular to a method for evaluating the spreading rate of plastering gypsum. Background technique [0002] Plastering gypsum is based on hemihydrate gypsum (CaSO 4 1 / 2H 2 O), type II anhydrite (type II CaSO 4 ) alone or mixed together as the main cementitious material, the plastering material made by adding admixtures. Plastering gypsum includes surface plastering gypsum, bottom plastering gypsum, light plastering gypsum and thermal insulation plastering gypsum. Among them, light plastering gypsum is mainly composed of high-quality light materials, special rubber powder and gypsum powder. It has no hollowing and no cracking. It has the strength of cement and is more environmentally friendly than cement. At the same time, it is low in cost and meets various customers. Demand and other characteristics have been vigorously promoted in the industry. [0003] The current plastering gypsum...

AI Technical Summary

Problems solved by technology

[0012] However, this method has the following problems: first, it is necessary to find a very smooth wall surface on the construction site, which is horizontal and vertical, and this condition is difficult to unify; There is unavoidable waste of materials during the construction process; third, although it is mentioned that the upper opening should be flush during construction, it is difficult to ensure that the shape of the lower opening is a straight line, which will lead to errors in calculating the area

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