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A kind of preparation method of high-strength alkali-free and chlorine-free accelerator
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An accelerator and high-strength technology, applied in the field of concrete admixtures, can solve the problem of low early strength
Active Publication Date: 2021-04-20
ZHENJIANG SOBUTE NEW MATERIAL CO LTD +1
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Problems solved by technology
[0005] In order to solve the shortcomings of the existing alkali-free accelerators such as low early strength, the invention provides a preparation method of a high-strength alkali-free chlorine-free accelerator
Method used
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Embodiment 1
[0037] The preparation of high-strength alkali-free and chlorine-free accelerator comprises the following steps:
[0039] (2) Heat 60g of aluminum sulfate, 12g of diethanolamine, 12g of mixed solution A and 16g of water to react for 5 hours at 80°C to obtain mixed solution B; cool down to room temperature, and then use an emulsifier to disperse at high speed for 10 minutes at a linear speed of 20m / s, that is, a high-strength alkali-free and chlorine-free accelerator.
Embodiment 2
[0041] The preparation of high-strength alkali-free and chlorine-free accelerator comprises the following steps:
[0043] (2) Heat 40g of aluminum sulfate, 2g of diethanolamine, 6g of mixed solution A and 52g of water to react for 1 hour at 50°C to obtain mixed solution B; cool down to room temperature, and then use an emulsifier to disperse at high speed for 10 minutes at a linear speed of 30m / s, that is, a high-strength alkali-free and chlorine-free accelerator.
Embodiment 3
[0045] The preparation of high-strength alkali-free and chlorine-free accelerator comprises the following steps:
[0047] (2) Heat 50g of aluminum sulfate, 10g of triethanolamine, 8g of mixed solution A and 32g of water to react for 2 hours at 50°C to obtain mixed solution B; cool down to room temperature, and then use an emulsifier to disperse at high speed for 10 minutes at a linear speed of 25m / s, that is, a high-strength alkali-free and chlorine-free accelerator.
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Abstract
The invention discloses a preparation method of a high-strength alkali-free and chlorine-free accelerator: 1) mixing 2-acrylamide-2-methylpropanesulfonic acid, acrylic acid, and a modified nano-silica solution initiator Ultrasonic dispersion with water, heated to 60-80°C and reacted for 5-8 hours to obtain mixed solution A; 2) Heat aluminum sulfate, alcohol amine, water and mixed solution A to 60-80°C for 1-5 hours to obtain mixed solution B: Cool down to room temperature, and then use an emulsifier to disperse at high speed for 10 minutes to obtain a high-strength alkali-free and chlorine-free accelerator. The alkali-free and chlorine-free quick-setting agent prepared by organic modification can greatly improve the 1d compressive strength of cementmortar, and at the same time can improve the stability and other comprehensive properties of the product.
Description
technical field [0001] The invention belongs to the technical field of concrete admixtures, in particular to a preparation method of a high-strength alkali-free and chlorine-free accelerator. Background technique [0002] Accelerator is a concrete admixture that makes cement or concrete set and harden quickly. Its main function is to increase the thickness of the first spraying of shotcrete, shorten the interval between the second spraying, and improve the early strength of concrete at the same time, so as to provide support resistance in time. It has been widely used in modern underground engineering, mining engineering, plugging and emergency rescue Wait for the project. [0003] Alkali-free accelerators have little effect on the strength of concrete in the later stage, and are becoming the main direction of accelerator development. Alkali-free accelerators with aluminum sulfate as the main component are easy to obtain raw materials and simple preparation processes. The ...
Claims
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