Water reducing agent and preparation method thereof, antifreeze agent and use thereof, and concrete

A water reducer and antifreeze technology, applied in the field of antifreeze, can solve the problems of high water-binder ratio at the interface between aggregate and mortar, poor workability of concrete, and high risk of freezing at the interface, achieving excellent water reducing effect and improving early strength Peaceful function, the effect of reducing the risk of freezing

Active Publication Date: 2022-07-22
北京金隅节能科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned antifreeze has the following prominent problems: 1. The antifreeze ingredients in common formulas are controlled products that are prone to poisoning and explosives, and their application is increasingly restricted; 2. The inorganic salts required to meet antifreeze and early strength are too high, and the alkali content is relatively high ; 3. Poor workability of concrete leads to adding water during construction, resulting in a high risk of freezing; 4. Bleeding leads to an excessively high water-binder ratio at the interface between aggregate and mortar, resulting in a high risk of freezing at the interface; based on this, the current water reducing agent and Antifreeze still needs improvement

Method used

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  • Water reducing agent and preparation method thereof, antifreeze agent and use thereof, and concrete
  • Water reducing agent and preparation method thereof, antifreeze agent and use thereof, and concrete
  • Water reducing agent and preparation method thereof, antifreeze agent and use thereof, and concrete

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preparation example Construction

[0063] In another aspect of the present invention, the present invention provides a preparation method of the aforementioned water reducing agent. The method includes: reacting after mixing the raw materials to obtain the water reducing agent. Therefore, the preparation method is simple, the operation is convenient, and the realization is easy.

[0064] In some embodiments of the invention, the reaction is carried out at 60-80°C. As a result, the temperature of synthesizing the superplasticizer is lower, which is conducive to saving energy.

[0065] It should be noted that the raw materials of the water reducing agent are the same as those described above, and will not be repeated here.

[0066] In another aspect of the present invention, the present invention provides an antifreeze. The antifreeze comprises the following raw materials: the water reducing agent and non-oxidizing salts prepared by the aforementioned water reducing agent or the aforementioned preparation meth...

Embodiment 1

[0095] The synthetic method of water reducing agent is as follows:

[0096] (1) The raw materials for synthesizing water reducing agent include the following: isoprenol polyoxyethylene ether (molecular weight 4000), allyl alcohol polyoxyethylene ether (molecular weight 2400), acrylic acid, maleic anhydride, mercaptopropionic acid, hydrogen peroxide, vitamins C and deionized water, wherein the molar ratio of prenol polyoxyethylene ether to allyl alcohol polyoxyethylene ether is 1:0.5, and the molar ratio of prenol polyoxyethylene ether to acrylic acid is 1:7, The molar ratio of isopentenol polyoxyethylene ether and maleic anhydride is 1:0.5, the mole ratio of isopentenol polyoxyethylene ether and mercaptopropionic acid is 1:0.15, and the ratio of isopentenol polyoxyethylene ether and hydrogen peroxide is 1:0.15. The molar ratio is 1:0.2, and the molar ratio of hydrogen peroxide to vitamin C is 1:0.2.

[0097] (2) The step of synthesizing the water reducing agent comprises the ...

Embodiment 2

[0105] The synthetic method of water reducing agent is as follows:

[0106] (1) The raw materials for synthesizing superplasticizers include the following: isoprenol polyoxyethylene ether (molecular weight 4500), allyl alcohol polyoxyethylene ether (molecular weight 2000), acrylic acid, maleic anhydride, mercaptopropionic acid, hydrogen peroxide, vitamins C. Deionized water, wherein the molar ratio of prenol polyoxyethylene ether to allyl alcohol polyoxyethylene ether is 1:0.8, the molar ratio of prenol polyoxyethylene ether to acrylic acid is 1:6, and The molar ratio of pentenol polyoxyethylene ether and maleic anhydride is 1:1, the molar ratio of isopentenol polyoxyethylene ether and mercaptopropionic acid is 1:0.15, and the mole ratio of isopentenol polyoxyethylene ether and hydrogen peroxide The ratio is 1:0.25, and the molar ratio of hydrogen peroxide to vitamin C is 1:0.2.

[0107] (2) The step of synthesizing the water-reducing agent comprises the following steps: addi...

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Abstract

The invention provides a water reducing agent and a preparation method thereof, an antifreeze agent and its use, and concrete, and relates to the technical field of antifreeze. The water reducing agent includes the following raw materials: prenol polyoxyethylene ether and allyl alcohol polyoxyethylene ether, and at least one of acrylic acid and maleic anhydride, wherein the prenol polyoxyethylene ether and the The molar ratio of the allyl alcohol polyoxyethylene ether is 1:(0.5-1). Antifreezes include the aforementioned water reducers and non-oxidizing salts. In the water reducing agent, isoprenol polyoxyethylene ether and allyl alcohol polyoxyethylene ether are used to synthesize the water reducing agent. Workability, when the water reducer is used in antifreeze, because the water reducer has strong early strength properties, it can effectively reduce the use of antifreeze early strength components in antifreeze; antifreeze is safe and conducive to Reducing the alkali content in concrete can effectively reduce the risk of concrete bleeding.

Description

technical field [0001] The invention relates to the technical field of antifreeze, in particular to a water reducing agent and a preparation method thereof, an antifreeze agent and its use, and concrete. Background technique [0002] When the temperature is lower than 0 ℃, the gradual freezing of water in the concrete makes the hydration of cement gradually stagnate, and the volume expansion caused by the freezing of water causes damage to the structure of concrete hydration products. Appropriate concrete antifreeze can make concrete continue to hydrate and harden under negative temperature, and achieve the expected performance under specified curing conditions as a concrete admixture. Therefore, adding antifreeze to negative temperature concrete is a common technical means for concrete negative temperature construction in winter. [0003] At present, the liquid antifreeze used in domestic and foreign construction projects is mainly composed of water reducing agent, early s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/32C04B24/38C04B28/00C04B103/30C04B103/60
CPCC04B40/0039C04B28/00C04B2103/302C04B2103/601C04B2111/76C04B2201/50C04B24/32C04B24/04C04B24/10C04B22/068C04B22/14C04B24/383
Inventor 刘洋李方忠朱修鹏任建波王倩王晓英张露瑶付海平宋肖贤王立彬
Owner 北京金隅节能科技有限公司
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