Lightweight concrete perforated plate profile and its preparation process

Abstract

The invention discloses a lightweight concrete porous plate section bar, which characterized in that a concrete mixture is used as a working masterbatch. The working masterbatch comprises the following materials by weight: 20-30 parts of cement, 30-60 parts of fly ash, 30-40 parts of quartz sand, 10-15 parts of a lightweight blend, 0.4-0.6 part of cellulose ether, 5-8 parts of plant fiber and 1-3 parts of other additives. The preparation technology is as below: first conducting a first dry stirring on the raw materials for even mixing, then adding 10-18 parts of water for a secondary even mixing; and then conducting plasticity extrusion moulding by a vacuum extruder and a porous extrusion mold. The invention uses regenerated industrial wastes by a large proportion of, reduces the dosage of cement, reduces the cost and is beneficial to saving of resource and energy and environmental protection.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a lightweight, high-strength bearing-capacity concrete porous plate profile and a preparation process thereof. Background technique [0002] With the continuous development of China's economy and the continuous advancement of science and technology, building material products are also constantly updated. Among the current concrete building material products, the ones made by the flow method or the flow method plus pressing method are the most popular in the market. It is widely known that this manufacturing process is as follows: the fiber concrete flow slurry to be formed is injected into the cavity of the frame mold by a spray pump or a feeder, and after a certain period of shrinkage and solidification, pressurization and setting, and release The steps such as mold out blank are completed. The shortcoming that this flow slurry method presses the molding method techn...

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Problems solved by technology

[0003] First, the production scale is small, the process cycle is long, the process is cumbersome, the labor intensity of the workers is high, and the process is basically completed by manual or semi-automatic operation, so the production efficiency is low, the space is large, and the manufacturing cost is high;

[0004] Second, the molded product has great limitations in terms of size, design and color, functional use and requirements, such as it is impossible or difficult to make the product hollow, porous or special shape;

[0005] Third, the technical performance index of the formed product is low, the bearing strength, stiffness and impact toughness are not high, the quality is unstable, the product qualification rate is low, and it is difficult to upgrade;

[0006] Fourth, more water is used in the molding process, which easily causes a certain degree of water discharge pollution, and the production environment is relatively harsh, which is not conducive to clean and civilized production and management;

[0007] Fifth, because the strength of the above-mentioned concrete building materials generally does not meet the strength required by the national standard for high-rise buildings, some manufacturers forcefully meet the standard for profit, and adopt the method of adding asbestos materials to the products, and this asbestos The material is seriously harmful to the human body and affects the environment. It has been banned by many countries in the world as an additive to building materials. This method is neither advisable nor feasible.

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