Starch-based water reducing agent and production process thereof

A high-efficiency water reducer, starch-based technology, applied in the field of starch-based high-efficiency water reducer, can solve the problems of retardation and water reduction effect, many organic harmful substances, unfavorable environmental protection, etc., to achieve retardation and water reduction effect Excellent, lower production costs, and environmental protection effects

Inactive Publication Date: 2021-08-17
ZHEJIANG LAOHUSHAN BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its retarding and water-reducing effects are relatively poor, and further improvement is still needed.
Furthermore, it contains more organic harmful substances, which is easy to pollute the environment and is not conducive to the protection of the environment.

Method used

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  • Starch-based water reducing agent and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A starch-based high-efficiency water reducer, made of the following raw materials in parts by weight: 50 parts of corn starch, 4 parts of ammonium persulfate, 5 parts of ethylene oxide, 20 parts of sodium methacrylate, 4.5 parts of ammonium cerium nitrate , 2.5 parts of dihydroxysuccinic acid, appropriate amount of distilled water and absolute ethanol.

[0027] A production process of starch-based high-efficiency water reducer, comprising the following steps:

[0028] S1. Take an appropriate amount of starch sample, mix it with an appropriate amount of distilled water to form an appropriate concentration of starch milk; use an appropriate amount of sodium hydroxide solution to adjust its pH to 8.5, then add an appropriate amount of oxidizing reagent, and in 75 Under the condition of ℃, oxidize the starch milk for 4 hours, and the obtained product is recorded as the mixed component;

[0029] S2. Add an appropriate amount of hydrochloric acid solution to the mixed compon...

Embodiment 2

[0037] A starch-based high-efficiency water reducer, made of the following raw materials in parts by weight: 70 parts of potato starch, 5 parts of hydrogen peroxide, 8 parts of propylene oxide, 35 parts of sodium methacrylate, 6 parts of ammonium persulfate, 3.2 parts Dihydroxysuccinic acid, appropriate amount of distilled water and absolute ethanol.

[0038] A production process of starch-based high-efficiency water reducer, comprising the following steps:

[0039] S1. Weigh an appropriate amount of starch sample, mix it with an appropriate amount of distilled water to form an appropriate concentration of starch milk; adjust its pH to 9.2 with an appropriate amount of sodium hydroxide solution, then add an appropriate amount of oxidizing reagent, and in 80 Under the condition of ℃, oxidize the starch milk for 5 hours, and the obtained product is recorded as the mixed component;

[0040] S2. Add an appropriate amount of hydrochloric acid solution to the mixed components obtai...

Embodiment 3

[0048] A starch-based high-efficiency water reducer, made of the following raw materials in parts by weight: 80 parts of tapioca starch, 8 parts of potassium permanganate, 12 parts of butylene oxide, 45 parts of sodium methacrylate, 7.0 parts of persulfate Potassium, 4.0 parts of dihydroxysuccinic acid, appropriate amount of distilled water and absolute ethanol.

[0049] A production process of starch-based high-efficiency water reducer, comprising the following steps:

[0050] S1. Take an appropriate amount of starch sample, mix it with an appropriate amount of distilled water to form an appropriate concentration of starch milk; use an appropriate amount of sodium hydroxide solution to adjust its pH to 9.6, then add an appropriate amount of oxidizing reagent, and in 85 Under the condition of ℃, oxidize the starch milk for 6 hours, and the result is recorded as the mixed component;

[0051] S2. Add an appropriate amount of hydrochloric acid solution to the mixed components ob...

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Abstract

The invention relates to the technical field of building material preparation, in particular to a starch-based water reducing agent and a production process thereof. The starch-based water reducing agent is prepared from the following raw materials in parts by weight: 50-80 parts of starch, 4-8 parts of an oxidation reagent, 5-12 parts of an etherification reagent, 20-45 parts of sodium methallyl sulfonate, 4.5-7.0 parts of an initiator, 2.5-4.0 parts of dihydroxysuccinic acid and a proper amount of distilled water and absolute ethyl alcohol. The starch is used as a raw material for preparing the high-efficiency water reducing agent and is modified, and the modified starch contains rich macromolecular groups, so that a strong steric hindrance effect is easily formed on the surfaces of cement particles, the cement particles are more sufficiently and uniformly dispersed, and re-agglomeration of the dispersed particles is reduced. Compared with a water reducing agent sold in the market at present, the retarding and water reducing effects of the starch-based water reducing agent are more excellent. Moreover, the starch is used as the raw material, so that the production cost can be reduced, the environment can be protected, and the pollution to the environment is reduced.

Description

technical field [0001] The invention relates to the technical field of building material preparation, in particular to a starch-based high-efficiency water reducer and its production process. Background technique [0002] Concrete, referred to as "concrete (tóng)": refers to the collective name of engineering composite materials that use cementitious materials to cement aggregates into a whole. Generally speaking, the term concrete refers to the cement concrete obtained by using cement as the cementitious material, sand and stone as the aggregate; mixed with water (may contain admixtures and admixtures) in a certain proportion, and stirred. Concrete, which is widely used in civil engineering. [0003] Water reducer is a concrete admixture that can reduce the amount of mixing water while maintaining the slump of concrete basically unchanged. Most of them are anionic surfactants, such as lignosulfonate, naphthalenesulfonate formaldehyde polymer, etc. After being added to th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B103/30
CPCC04B40/0039C04B2103/302
Inventor 毛华新毛卓荣
Owner ZHEJIANG LAOHUSHAN BUILDING MATERIALS
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