Machine-spray dry-blending plastering mortar

Abstract

The invention relates to a machine-spray dry-blending plastering mortar. The machine-spray dry-blending plastering mortar comprises a main raw material and an additive. the machine-spray dry-blending plastering mortar comprises the following raw materials: 12-14% of 42.5 intensity ordinary portland cement, 16-24% of stone flour, 56-66% of machine-made sand medium sand and 0-16% of machine-made sand coarse sand; and the additive comprises the components: 0.03-0.055% of cellulose ether, 0.005-0.015% of starch ether and 0.02-0.05% of an air-entrainer. An interrupted machine-made sand raw material is employed, the grading is stable, is controllable by manual work, each additive is individually used while production, and corresponding adjustment can be carried out by aiming at different conditions and environment. The employed machine-made sand grading concept saves the cost of the raw materials, and the individual usage of the additive enhances the application property.

Description

technical field [0001] The invention relates to the field of dry-mixed mortar, in particular to a dry-mixed plastering mortar for machine spraying which uses machine-made sand instead of river sand. Background technique [0002] Dry-mixed mortar refers to the powdery mixture made by mixing fine-quality aggregates selected according to requirements, quantitative cementitious materials (such as cement) and various high-performance trace additives in a certain proportion, and is bulk or dry-mixed in the form of dry powder. Packaged finished mortar. When using, just add water and stir, and the quality is guaranteed. [0003] Most of the existing dry-mixed plastering mortars use river sand as the raw material, and the amount of sand in the mortar raw materials accounts for about 70%. Because of the uncontrollability of river sand, the mortar using river sand There is no concept of gradation, and the phenomenon of gradation outage is common. Stable gradation in mortar is one of...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing dry-mixed plastering mortars use river sand as the raw material, and the amount of sand in the mortar raw materials accounts for about 70%. Because of the uncontrollability of river sand, the mortar using river sand There is no concept of gradation, and the phenomenon of gradation outage is common

Stable gradation in mortar is one of the fundamental conditions to ensure the quality of mortar. However, the uncontrollable river sand gradation leads to the uncontrollable phenomenon of mortar gradation, which directly affects the fundamental quality of mortar.

[0004] At the same time, the composite additives added to the dry-mixed plastering mortar, when producing dry-mixed mortar, manufacturers usually mix the additives together to form a composite additive. There is no clear product targeting, and it cannot adapt to changing working conditions. Changes in various aspects such as wall materials, construction methods, etc. cannot be adjusted in a timely and effective manner, which affects the construction quality

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