Production process for polymer cement waterproof mortar

Abstract

The invention belongs to the technical field of building waterproofing and particularly relates to a production process for polymer cement waterproof mortar. The production process comprises the following steps that the amounts of required additives are amplified according to a certain ratio, and various powder additives are sequentially weighed; then the additives are put in a vibrating screen machine, fall into the tray after being vibrated and crushed, are heated with a ceramic heating piece at the bottom of the tray and are extracted into a hopper through a negative pressure pipeline conveyor, the additives in the hopper slide into a delivery bin through a conveying pipeline, and at the same time, the additives are heated with a ceramic heating piece at the bottom of the conveying pipeline again; then the additives are fed into a mixer, and uniform stirring and mixing are performed to prepare additive mother powder; and cement, fine aggregates, latex powder and the additive motherpowder are sent into the mixer, and uniform stirring and mixing are performed to prepare the polymer cement waterproof mortar. The additive mother powder produced by the process is uniform in particles and mixing, and the obtained polymer cement waterproof mortar is high in burdening efficiency and stable in performance.

Description

technical field [0001] The invention belongs to the technical field of building waterproofing, and more specifically relates to a production process of polymer cement waterproof mortar. Background technique [0002] Polymer cement waterproof mortar (referred to as JF waterproof mortar) is mainly composed of cement and fine aggregate, with redispersible latex powder as modifier, and adding appropriate amount of additives, such as cellulose ether, accelerator, disinfectant Foaming agent, expansion agent and other functional additives are physically mixed in a certain proportion in granular or powder form, transported to the construction site in bags or in bulk, and can be used directly after mixing with water. The industry standard JC / T 984-2011 "Polymer Cement Waterproof Mortar" divides "JF waterproof mortar" products into single-component (S-type) and two-component (D-type) according to components. Single-component is composed of cement, fine aggregate, redispersible latex ...

AI Technical Summary

Problems solved by technology

[0003] In the traditional production process of polymer cement waterproof mortar, cement, fine aggregate, latex powder and additives must be weighed before being put into the pressure tank before the ingredients are stirred. Auxiliaries are repeatedly weighed, and the amount of cement, fine aggregate, and latex powder added to each batch is different, so that the amount of each auxiliary required for each batch is different, so it is necessary to recalculate and weigh each auxiliary each time. additives, resulting in cumbersome batching process and low batching efficiency. In addition, the moisture contained in the same additive will change with time, and the moisture absorption degree of each additive at the same time is also different. In addition, the powder The weighing is inaccurate due to lifting and flying away, which makes the ratio of the additives weighed in each batch different, which leads to different components of polymer cement waterproof mortar in different batches, and its performance is also unstable.

[0004] The added powder additives are easily affected by the humid environment or its own hygroscopic characteristics, etc., often contain a certain amount of water, and are easy to form agglomerates, making it difficult for the additives to disperse during the mixing process, resulting in poor mixing of the additive master powder. Uniformity, which affects the dispersion of the auxiliary agent master powder in the polymer cement waterproof mortar. In addition, the agglomerated auxiliary agent particles are not uniform, and the particle size between each auxiliary agent is not uniform, so that the obtained polymer cement waterproof mortar The particles are not uniform, which affects the cohesiveness, anti-penetration and other properties of polymer cement waterproof mortar.

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