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Water reducing agent for fabricated concrete member and preparation method of water reducing agent

A water-reducing agent and concrete technology, which is applied in the field of water-reducing agent and its preparation for prefabricated concrete components, can solve the problems of poor material discharge in the blanking process, affecting the construction progress, delamination and segregation, etc., so as to improve the cohesion effect, The effect of improving the slow release effect and improving the slump retention performance

Active Publication Date: 2022-03-22
山西新恒隆建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the production process of the existing prefabricated concrete components, the following problems are prone to occur: (1) Unsmooth discharge occurs during the blanking process, which affects the construction progress; (2) The slump loss of freshly mixed concrete is too fast, especially The phenomenon is more obvious at high temperature in summer; (3) After the slump is increased by adjusting the amount of admixture, the phenomenon of stratification and segregation is prone to occur after vibration
Among them, water-reducing agents are widely used, which have excellent water-reducing effect and good dispersion effect, but water-reducing agents specially applied to prefabricated concrete components in the market are relatively rare, and it is difficult to comprehensively meet the above performance requirements

Method used

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  • Water reducing agent for fabricated concrete member and preparation method of water reducing agent
  • Water reducing agent for fabricated concrete member and preparation method of water reducing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This embodiment provides a water reducing agent for assembling a concrete member, the preparation of the water reduction agent comprises allyl polyoxyethylene ether (molecular weight of 400-2400), soy acid anhydride, ethyl acrylate, 6 - Acrylaminoic acid, glycol butter, its molar ratio of 1: 0.08: 0.15: 0.1: 0.2.

[0037] The preparation method of the above water repellent includes the following steps:

[0038] (1) Heat 6-acrylalaine heating to 100 ° C, then mixing concentrated sulfuric acid is uniform, and the addition of concentrated sulfuric acid is 1% of the total reactant, then adding glycol butyl butyl butter, stirring at 110 ° C. The esterification reaction was carried out under conditions, the reaction time was 5 h, and the product was obtained;

[0039] (2) 50% of the allyl polyoxyethylene ether, soy acid anhydride, and deionized water (added amount is polyoxyethylene ether, and the total mass of both soy acid anhydride) is added to the reactor, and then the temper...

Embodiment 2

[0042]Based on the first embodiment, the present embodiment also provides a method for using a water reduction agent for assembling a concrete member, and a uniform, water reduction agent, and dispersant are mixed with the dispersant. The amount is 0.1%, 0.8%, and then the gelation material and aggregate are added, and then the mixing water is added to stir well, it can be discharged.

[0043] The active ingredient of the dispersant is amphoteric polymer, and the preparation of the amphoteric polymer comprises vinyl ether, 3-carboxy-N, N, N-trimethyl-2-propylene-1-ammonium chloride, N, N, N- Trimethyl-9-octadene-1-ammonium chloride, oleic acid, its molar ratio of 1: 0.1: 0.3: 0.4.

[0044] The preparation method of the above-mentioned amphoteric polymer includes the steps of:

[0045] S1, 3-carboxy-N, N, N-trimethyl-2-propylene-1-ammonium chloride is mixed with deionized water, formulated into a solution of 30% mass concentration, n, n, n- Trimethyl-9-octadene-1-ammonium chloride ...

Embodiment 3

[0050] Based on the example 2, the present embodiment also provides a method of preparing a dispersant in a method of use of the above-mentioned water repellent, and the specific step is: taking the prepared amphoteric polymer solution, concentrated under reduced pressure, and then The vacuum is dried under 40 ° C to dry the water content ≤ 2%, and the solid powder is obtained; the obtained solid powder and the starch, the porous ceramic powder is mixed in a mass ratio of 1: 0.4: 10, and is dispersed in a 1000R / min dispersion. Then, the sodium alginate material (3% injection amount) is sprayed, and then the powder is obtained after drying.

[0051] Sodium alginate materials include 10 parts of sodium alginate, 2 partial talc, 3 parts of phospholipids, 120 denominates.

[0052] The rest is the same as in Example 2.

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Abstract

The invention discloses a water reducing agent for an assembled concrete member and a preparation method thereof, the water reducing agent is prepared from unsaturated polyoxyethylene ether, crotonic anhydride, ethyl acrylate, 6-acryloylaminocaproic acid and butyl glycolate, and the specific preparation method comprises the following steps: firstly, carrying out esterification reaction on the 6-acryloylaminocaproic acid and the butyl glycolate; and the esterification product is copolymerized with other unsaturated monomers. The water reducing agent provided by the invention is a retarding type water reducing agent, and the dispersing agent is introduced in the use process of the water reducing agent for cooperative use, so that the flowability, slump retaining property and cohesiveness of concrete can be comprehensively improved.

Description

Technical field [0001] The present invention belongs to the technical field of concrete extension, and more particularly to a water reduction agent for assembling a concrete component and a preparation method thereof. Background technique [0002] The assembled concrete member is a concrete structure formed by the prefabricated member as the main force member. Compared with the current casting construction method, the assembled structure is conducive to green construction, as assembled construction is more in line with green construction, energy saving, water saving, water saving and environmental protection, reducing the negative impact on the environment, including Reduce noise to prevent dust, reduce environmental pollution. Clean transportation, reduce site interference and save water, electricity, materials and other resources and energy, follow the principles of sustainable development. [0003] Existing assembled concrete components are prone to the following problems duri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F222/04C08F220/58C08F220/18C04B24/26C04B103/30
CPCC08F283/065C04B24/2694C04B2103/302C08F222/04C08F220/58C08F220/1802Y02W30/91
Inventor 陈旗军周波王武先陈传财贺君豪
Owner 山西新恒隆建材有限公司
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