Water reducing agent and preparation method thereof, anti-freezing agent and purpose thereof, and concrete

A water-reducing agent and anti-freezing agent technology, applied in the field of anti-freezing, can solve the problems of high water-to-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. and workability function, the effect of reducing the risk of freezing

Active Publication Date: 2019-11-08
北京金隅水泥节能科技有限公司 +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

Method used

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  • Water reducing agent and preparation method thereof, anti-freezing agent and purpose thereof, and concrete
  • Water reducing agent and preparation method thereof, anti-freezing agent and purpose thereof, and concrete
  • Water reducing agent and preparation method thereof, anti-freezing agent and purpose thereof, and concrete

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preparation example Construction

[0063] In another aspect of the present invention, the present invention provides a method for preparing the aforementioned water reducer. The method includes: reacting after mixing various raw materials to obtain the water reducer. 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 performed at 60-80°C. Therefore, the temperature of the synthetic water reducer is lower, which is beneficial to energy saving.

[0065] It should be noted that the raw materials of the water reducer 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 agent. The antifreezing agent includes the following raw materials: the aforementioned water reducing agent or the water reducing agent prepared by the aforementioned preparation method and non-oxidizing salts. Therefore,...

Embodiment 1

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

[0096] (1) The raw materials for the synthesis of water reducer include the following: isopentenol 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 prenyl alcohol polyoxyethylene ether to allyl alcohol polyoxyethylene ether is 1:0.5, and the molar ratio of prenyl alcohol polyoxyethylene ether to acrylic acid is 1:7, The molar ratio of prenyl alcohol polyoxyethylene ether to maleic anhydride is 1:0.5, the molar ratio of prenyl alcohol polyoxyethylene ether to mercaptopropionic acid is 1:0.15, and the molar ratio of prenyl alcohol polyoxyethylene ether to hydrogen peroxide The molar ratio is 1:0.2, and the molar ratio of hydrogen peroxide to vitamin C is 1:0.2.

[0097] (2) The steps of synthesizing the water reducer inc...

Embodiment 2

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

[0106] (1) The raw materials for the synthesis of water reducer include the following: isopentenol 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 prenyl alcohol polyoxyethylene ether to allyl alcohol polyoxyethylene ether is 1:0.8, and the molar ratio of prenyl alcohol polyoxyethylene ether to acrylic acid is 1:6. The molar ratio of prenyl polyoxyethylene ether to maleic anhydride is 1:1, the molar ratio of prenyl polyoxyethylene ether to mercaptopropionic acid is 1:0.15, and the molar ratio of prenyl polyoxyethylene ether to 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 steps of synthesizing the water reducer include the following: add 0.1 mole o...

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Abstract

The invention provides a water reducing agent and a preparation method thereof, an anti-freezing agent and a purpose thereof, and concrete, which belongs to the technical field of freeze protection. The water reducing agent includes the following raw materials: isoamylenol polyoxyethylene ether and allyl alcohol polyoxyethylene ether, and at least one of acrylic acid and maleic anhydride, whereinthe molar ratio of the isoamylenol polyoxyethylene ether to the allyl alcohol polyoxyethylene ether is 1: (0.5-1). The anti-freezing agent includes the water reducing agent and non-oxidizing salts. The water reducing agent utilizes the isoamylenol polyoxyethylene ether and the allyl alcohol polyoxyethylene ether to perform cooperation as a water reducing agent synthesis monomer, under the synergistic effect of the two, the early strength performance of a product can be improved and the workability of the product can be improved, when the water reducing agent is applied to the anti-freezing agent, and since the water reducing agent is strong in early strength performance, usage of antifreezing early strength components in the anti-freezing agent can be effectively reduced.; and the anti-freezing agent is high in safety, is beneficial to reduce an alkali content in the concrete, and can effectively reduce the risk of bleeding of the concrete.

Description

technical field [0001] The invention relates to the field of antifreeze technology, in particular to a water reducing agent and a preparation method thereof, an antifreeze agent and its application, and concrete. Background technique [0002] When the temperature is lower than 0°C, the gradual freezing of water in the concrete will gradually stagnate the cement hydration, and the volume expansion caused by the freezing of water will damage the structure of the concrete hydration product. Appropriate concrete antifreeze is a concrete admixture that can continuously hydrate and harden concrete at negative temperatures, and achieve expected performance under specified curing conditions. Therefore, adding antifreeze to negative temperature concrete is a common technical means for negative temperature construction of concrete in winter. [0003] At present, the liquid antifreeze used in construction projects at home and abroad is mainly composed of water reducing agent, early st...

Claims

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Application Information

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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 北京金隅水泥节能科技有限公司
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