Concrete accelerator and preparation method thereof

Abstract

The invention discloses a concrete accelerator and a preparation method thereof. The concrete accelerator comprises the following components in parts by weight: 50-60 parts of waste aluminum ash, 3-8parts by weight of bauxite, 15-25 parts by weight of sodium carbonate, 6-10 parts by weight of silicon powder, 6-10 parts by weight of quick lime and 2-6 parts by weight of a stabilizer. The preparation method of the concrete accelerator comprises the following steps: accurately weighing the raw components in proportion, and conveying a formed mixture to a rotary kiln through a conveying system for roasting. According to the invention, shorter initial setting time and final setting time are obtained through a unique formula; better compressive strength is realized; the waste aluminum ash is adopted in the formula, so waste utilization can be reasonably carried out; in the preparation process, waste gas, waste water and waste smoke are avoided; and in the preparation method, a rotary kiln is adopted for roasting the mixed raw materials, a kiln temperature is easy to control, and a unique roasting process is selected, so the performance of the concrete accelerator can be effectively improved.

Description

Technical field [0001] The invention belongs to the technical field of concrete, and specifically relates to a concrete accelerator and a preparation method thereof. Background technique [0002] Accelerator is an admixture that can be mixed into concrete to quickly set and harden. The main types are inorganic salts and organic substances. Powdery solid, its mixing amount only accounts for 2% to 3% of the amount of cement in the concrete, but it can make the concrete initially set within 5 minutes and finally set within 10 minutes. In order to achieve the purpose of emergency repair or rapid setting of concrete in shafts. It is an indispensable additive in the sprayed concrete construction method. Their function is to accelerate the hydration and hardening of cement, and form enough strength in a short time to meet the requirements of special construction. [0003] The prior art accelerator is mainly made of alumina clinker (that is, clinker made by burning bauxite, soda ash an...

AI Technical Summary

Problems solved by technology

[0008] The concrete quick-setting agent in the prior art can only achieve initial setting within 5 minutes and final setting within 10 minutes within the initial setting time, and it is close to this time point, and the time cannot be reduced;

[0009] And the concrete quick-setting agent in the prior art cannot carry out the utilization of waste aluminum ash;

[0010] And the production of concrete quick-setting agent in the prior art can produce a large amount of waste gas, waste water and waste smoke;

[0011] And the preparation method of concrete quick-setting agent in the prior art can not effectively improve the performance of concrete quick-setting agent;

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