Concrete anti-mud agent

An anti-mud agent and concrete technology, applied in the field of concrete anti-mud agent, can solve the problems of insufficient water reduction rate, large slump loss, decreased working performance, etc., and achieve the effect of reducing adsorption consumption and good compatibility

Inactive Publication Date: 2020-02-28
佛山市华轩新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water reducing agent shows insufficient water reducing rate, large slump loss, serious decline in work performance, and reduced mechanical properties of concrete in the later stage
In order to overcome the influence of the mud content in the concrete aggregate on the concrete mixture, it is necessary to increase the amount of water-reducing agent in the concrete mix to make up for the shortage of water-reducing agent, which greatly increases the cost of concrete and easily causes concrete mixing. compound separation bleeding

Method used

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Examples

Experimental program
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preparation example Construction

[0018] Its preparation method comprises the following steps:

[0019] Preparation of base material: Weigh 300 kg of deionized water and 83.1 kg of methacryloyloxyethyltrimethylammonium chloride (DMC), stir evenly, and prepare for polymerization.

[0020] Preparation of material A: Weigh 56 kg of maleic anhydride (MA) and 177.4 kg of 2-acrylamide-2-methylpropanesulfonic acid (AMPS) respectively, dissolve them in 300 kg of deionized water, and then add 144 kg of acrylic acid (AA), Stir well and prepare for dropwise addition.

[0021] Preparation of material B: Weigh 46 kg of ammonium persulfate, dissolve in 300 kg of deionized water, stir evenly, and prepare for dropwise addition.

[0022] Start the mixer, heat the bottom material to about 90°C, add 32.9 grams of sodium hypophosphite, and start adding materials A and B dropwise after ten minutes of stirring. The material A is added dropwise for 150±20 minutes, and the material B is added dropwise for 180±20 minutes. After the ...

Embodiment 2

[0024] The raw materials in this example include: 144 kg of acrylic acid (AA), 56 kg of maleic anhydride (MA), 177.4 kg of 2-acrylamide-2-methylpropanesulfonic acid (AMPS), methacryloyloxyethyl tris Methyl ammonium chloride (DMC) 103.8 kg, ammonium persulfate 48.1 kg, sodium hypophosphite 43.3 kg.

[0025] Its preparation method comprises the following steps:

[0026] Preparation of base material: Weigh 300 kg of deionized water and 103.8 kg of methacryloyloxyethyltrimethylammonium chloride (DMC), stir evenly, and prepare for polymerization.

[0027] Preparation of material A: Weigh 56 kg of maleic anhydride (MA) and 177.4 kg of 2-acrylamide-2-methylpropanesulfonic acid (AMPS) respectively, dissolve them in 300 kg of deionized water, and then add 144 kg of acrylic acid (AA), Stir well and prepare for dropwise addition.

[0028] Preparation of material B: Weigh 48.1 kg of ammonium persulfate, dissolve it in 300 kg of deionized water, stir evenly, and prepare for dropwise addi...

Embodiment 3

[0031] The raw materials in this example include: 144 kg of acrylic acid (AA), 56 kg of maleic anhydride (MA), 177.4 kg of 2-acrylamide-2-methylpropanesulfonic acid (AMPS), methacryloyloxyethyl tris Methyl ammonium chloride (DMC) 124.6 kg, ammonium persulfate 50.2 kg, sodium hypophosphite 45.2 kg.

[0032] Its preparation method comprises the following steps:

[0033] Preparation of base material: Weigh 300 kg of deionized water and 124.6 kg of methacryloyloxyethyltrimethylammonium chloride (DMC), stir evenly, and prepare for polymerization.

[0034] Preparation of material A: Weigh 56 kg of maleic anhydride (MA) and 177.4 kg of 2-acrylamide-2-methylpropanesulfonic acid (AMPS) respectively, dissolve them in 300 kg of deionized water, and then add 144 kg of acrylic acid (AA), Stir well and prepare for dropwise addition.

[0035] Preparation of material B: Weigh 50.2 kg of ammonium persulfate, dissolve it in 300 kg of deionized water, stir evenly, and prepare for dropwise addi...

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Abstract

The invention discloses a concrete anti-mud agent which comprises the following raw material in parts by mole: 100 parts of acrylic acid (AA), 20-30 parts of maleic anhydride (MA), 35-45 parts of 2-acrylamide-2-methylpropanesulfonic acid (AMPS), 20-30 parts of cationic polymerization small monomer, 9 parts (w%) of a chain transfer agent and 10 parts (W%)of an initiator.

Description

technical field [0001] The invention relates to the technical field of concrete additives, in particular to a concrete anti-mud agent. Background technique [0002] With the prosperity of the domestic real estate construction industry and the investment of large-scale infrastructure, the demand for concrete as a main building structure material is rising. The supply of sand and gravel in concrete raw materials is seriously insufficient. Many cities use machine-made sand, mountain sand, stone chips or recycled aggregates to prepare concrete. These aggregates contain a certain amount of soil (bentonite, montmorillonite, illite, kaolin, etc.), which has a great impact on the dispersibility of the water-reducing agent in the concrete mixture. The water-reducing agent molecules are first adsorbed by the soil. Especially polycarboxylate superplasticizer, montmorillonite has strong adsorption to polycarboxylate, the maximum adsorption capacity of polycarboxylate containing polyox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/58C08F220/06C08F222/06C08F220/34C04B24/16
CPCC04B24/165C08F220/58
Inventor 朱火明
Owner 佛山市华轩新材料有限公司
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