Preparation method of waste heat recycling concrete

Abstract

The present invention discloses a preparation method of a waste heat recycling concrete and belongs to the technical field of concrete production; the preparation method comprises the following stepsof: mixing concrete raw materials; erecting a hollow prefabricated wall formwork; pre-treating skeleton reinforcements; assembling outer reinforcement meshes; pouring the mixed concrete into the hollow prefabricated wall formwork, and controlling pouring velocity; and static placing the hollow prefabricated wall formwork for heat preservation at certain temperature after thickening and solidifyinga concrete slurry in the hollow prefabricated wall formwork; through the preparation method, in a process of static placing the poured concrete slurry, internal temperature of the hollow prefabricated wall formwork can be increased and internal and external temperature differences of the hollow prefabricated wall formwork can be reduced, thereby reducing internal and external stress differences of the hollow prefabricated wall formwork during concrete solidification and avoiding cracks in the hollow prefabricated wall formwork, and improving use safety and construction quality of the hollow prefabricated wall formwork.

Description

technical field [0001] The invention relates to the technical field of concrete production, and more specifically, relates to a preparation method of waste heat reused concrete. Background technique [0002] Concrete, referred to as "concrete (tóng)": refers to the general designation of engineering composite materials in which aggregates are cemented into a whole by cementitious materials. Generally speaking, the term concrete refers to the cement concrete obtained by using cement as the cementitious material, sand and stone as the aggregate; mixed with water (may contain admixtures and admixtures) in a certain proportion, and stirred. Concrete, which is widely used in civil engineering, can be divided into inorganic cementitious concrete and organic cementitious concrete according to cementitious materials. Inorganic cementitious concrete includes lime siliceous cementitious concrete, Portland cement concrete, calcium Aluminum cement concrete, gypsum concrete, magnesium c...

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Problems solved by technology

[0003] The use of prefabricated slabs can reduce the workload of supporting formwork on the construction site, save labor and turnover materials, and has good economy. It is an important measure for prefabricated concrete buildings to reduce cost, speed up construction period, and ensure quality. Among them, prestressed slabs can effectively play With the effect of high-strength materials, the production efficiency of prefabricated slabs is high, the installation speed is fast, and it can create significant economic benefits. However, in the process of making prefabricated laminated hollow-core slabs, the existing concrete needs to stop the concrete slurry after pouring. , the follow-up operation can only be carried out after the inside and outside of it are both thickened and fixed. However, in this process, due to the different internal and external temperatures of the hollow prefabricated wall panels, and the internal temperature is generally lower than the external temperature, resulting in internal and external hollow wall panels. The temperature difference affects the stress gap when the concrete of the hollow wall panel is solidified, resulting in cracks inside the hollow prefabricated wall panel, which affects the use safety and construction quality of the hollow prefabricated wall panel

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