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Composite activated cement reinforced grinding aids containing polycarboxylic acid series and method for preparing the same

A technology of enhancing grinding aid and compound activation, applied in cement production and other directions, can solve problems such as corrosion of steel bars and affect the durability of concrete, and achieve the effect of increasing fluidity, improving grinding effect, and preventing fine particle agglomeration

Inactive Publication Date: 2008-05-21
李军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is easy to cause the alkali-aggregate reaction of concrete and the corrosion of steel bars, which affects the durability of concrete

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Prepare the composite activated cement reinforced grinding aid containing polycarboxylic acid series according to the following method and raw materials:

[0027] The first step, esterification reaction:

[0028] Prepare polyethylene glycol monomethyl ether (meth) acrylate, add 10 parts of esterification catalyst toluenesulfonic acid, 10 parts of polymerization inhibitor hydroquinone, 10 parts of vulcanized diphenylamine, add 10 parts of methacrylic acid with a molecular weight of In the polyethylene glycol monomethyl ether of 1000, control the time of adding methacrylic acid within 120±10 minutes, and react for 4±0.5 hours under the condition of 80±5°C. After the reaction is completed, pump out the water and toluene. An esterified product of polyethylene glycol monomethyl ether (meth)acrylic acid is obtained, and the molecular weight of the esterified product is 5000-50000.

[0029] The second step, polymerization reaction:

[0030] Prepare the composite activated ce...

Embodiment 2

[0033] The compound activated cement that contains polycarboxylate system of liquid is prepared by the method described in embodiment 1 strengthens grinding aid:

[0034] The weight parts of the raw materials in the first step are as follows: polyethylene glycol monomethyl ether with a molecular weight of 2000, polyethylene glycol monomethyl ether with a molecular weight of 700, and 12 parts of methacrylic acid.

[0035]The second step: 5 parts of esterification catalyst concentrated sulfuric acid, 25 parts of toluenesulfonic acid, 20 parts of polymerization inhibitor hydroxyanisole, 50 parts of initiator sodium persulfate, 30 parts of grinding aid diethanolamine, 30 parts of diethylene glycol 60 parts of activator calcium lignosulfonate, 5 parts of reinforcing agent sodium acetate, 6 parts of urea, 5 parts of naphthenic acid, 10 parts of chain transfer agent mercaptoethanol, 10 parts of blending agent sodium hydroxide. The prepared liquid polycarboxylate-containing composite ...

Embodiment 3

[0037] The compound activated cement that contains polycarboxylate system of liquid is prepared by the method described in embodiment 1 strengthens grinding aid:

[0038] The weight parts of the raw materials in the first step are as follows: 10 parts of polyethylene glycol monomethyl ether with a molecular weight of 700 and acrylic acid.

[0039] The parts by weight of the raw materials used in the second step are as follows: 5 parts of esterification catalyst concentrated sulfuric acid, solid acid SO 4 2- / ZrO 2 30 parts; 5 parts of polymerization inhibitor hydroxyanisole, 5 parts of diphenylamine sulfide; 15 parts of initiator ammonium persulfate, 15 parts of potassium persulfate; 70 parts of grinding aid diethylene glycol; activator sodium vinyl sulfonate 40 parts, 5 parts of pulp waste liquid; 2 parts of strengthening agent urea, 4 parts of naphthenic acid, 8 parts of capric acid; 15 parts of chain transfer agent mercaptoethanol, 5 parts of β-mercaptoethanol; The compo...

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Abstract

The invention relates to a cement reinforced grinding aid, containing polycarboxylic acid type composite activated cement reinforced grinding aid, which contains esterification catalyst, inhibitor, initiator, grinding aid, activator, strengthening agent, blending agent and chain transfer agent and contains no chlorine ion. The polycarboxylic acid type composite activated cement reinforced grinding aid is a neutral efficient composite cement additive, which is synthesized through the highly efficient magnetized, activated and composite technology. The invention is made though synthesizing inorganic reinforced components with optimized surfactant and antistatic agent and has the advantages of toxin-free, hazard-free, nonirritant, chlorine-free, flame retardant and non-corrosive. The product belongs to green produce. The used amount is 0.015-0.025 weight portions of cement, and the mill output per hour can be improved by 10-25 percent. The twenty eighth day strength of the cement can be increased by 4-8MPa. The strength is increased by 2-4MPa in three days.

Description

Technical field: [0001] The invention relates to a composite live cement reinforced grinding aid containing polycarboxylic acid series, and also provides a manufacturing method thereof. Background technique: [0002] Grinding is completed when the mill rotates, and the grinding bodies in the mill collide, squeeze, and rub against each other. It is a process of particle size change and mechanochemical change. The grinding process is also a process with high energy consumption and low efficiency, and more than 80% of the energy is wasted. In order to reduce energy consumption and improve grinding efficiency, people usually take two measures: one is to improve the mechanism of the grinding machine, the grinding process, the grinding method, etc. so that more mechanical energy can act on the material to be ground; the other is Adding a small amount of chemical additives in the grinding process improves the mechanochemical process of grinding, so as to achieve the purpose of imp...

Claims

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Application Information

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IPC IPC(8): C04B7/52
CPCC04B7/52C04B2111/00025C04B2111/28C04B2111/26C04B2103/52C04B2111/00017C04B2111/1062C04B40/0046Y02P40/10C04B24/2641
Inventor 李军邵月玲李冬唐凤娟
Owner 李军
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