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An anti-adsorption type concrete glue reducer and its application

A concrete and glue reducer technology, applied in the field of concrete admixture, can solve the problems of reducing the effective content of polycarboxylate water reducer, reducing the dispersion efficiency of polycarboxylate water reducer, and performance loss, so as to reduce the amount of cement, resist The effect of improving permeability and crack resistance and improving workability

Active Publication Date: 2022-07-01
西安同成建筑科技有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Clay, mineral or porous structure materials have a certain adsorption effect on polycarboxylate superplasticizers, and the adsorption capacity is stronger than that of cement particles on polycarboxylate superplasticizers. This competitive adsorption reduces the ability of polycarboxylate superplasticizers. The effective content of the water agent, thereby reducing the dispersion efficiency of the polycarboxylate superplasticizer, causing the loss of its performance

Method used

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  • An anti-adsorption type concrete glue reducer and its application
  • An anti-adsorption type concrete glue reducer and its application
  • An anti-adsorption type concrete glue reducer and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The present embodiment provides a kind of anti-adsorption type concrete glue reducer, prepares according to the following steps:

[0020] (1) 8kg of methacrylic acid emulsion, 0.6kg of polycarboxylate water-reducing agent, 0.5kg of cellulose ether and 90.9kg of water are mixed to obtain leveling water-retaining agent TC-LPB.

[0021] (2) at 30 ℃, with leveling water retention agent TC-LPB 4kg, castor oil phosphate 7kg, polyamine polyether methylidene phosphamide 4kg, maleic anhydride-acrylic acid copolymer 4kg, sodium formate 5kg, thiocyanate 7kg of sodium, 35kg of triethanolamine and 34kg of water were added to the reaction kettle respectively, mixed and stirred for 1h, and the setting stirring rate was 300r / min; wherein the weight-average molecular weight of the maleic anhydride-acrylic acid copolymer was 8000.

[0022] (3) Cool the mixed solution to room temperature to prepare anti-adsorption type concrete glue reducing agent TC-KJ-01.

[0023] (4) The anti-adsorpti...

Embodiment 2

[0026] The present embodiment provides a kind of anti-adsorption type concrete glue reducer, prepares according to the following steps:

[0027] (1) 7.2kg of methacrylic acid emulsion, 0.7kg of polycarboxylic acid water-reducing agent, 0.6kg of cellulose ether and 91.5kg of water are mixed to obtain leveling water-retaining agent TC-LPB.

[0028] (2) at 25 ℃, with leveling water retention agent TC-LPB 5kg, isooctyl phosphate 8kg, ethylenediamine tetramethylene phosphine 5kg, maleic anhydride-acrylic acid copolymer 5kg, sodium formate 6kg, thiocyanate 8kg of sodium, 25kg of triethanolamine and 38kg of water were added to the reaction kettle respectively, mixed and stirred for 4h, and the stirring rate was set to be 100r / min; wherein the weight-average molecular weight of the maleic anhydride-acrylic acid copolymer was 6000.

[0029] (3) Cool the mixed solution to room temperature to prepare anti-adsorption type concrete glue reducing agent TC-KJ-02.

[0030] (4) The anti-adsor...

Embodiment 3

[0033] An anti-adsorption type concrete glue reducing agent of the present embodiment is prepared according to the following steps:

[0034] (1) 6.5kg of methacrylic acid emulsion, 0.8kg of polycarboxylate water-reducing agent, 0.7kg of cellulose ether and 92kg of water are mixed to obtain leveling water-retaining agent TC-LPB.

[0035] (2) at 40 ℃, with leveling water retention agent TC-LPB 6kg, alkyl phosphate 9kg, hexamethylene diamine tetramethylene phosphine 6kg, maleic anhydride-acrylic acid copolymer 6kg, sodium formate 7kg, sodium thiocyanate 10kg, 30kg of triethanolamine and 36kg of water were added to the reaction kettle respectively, mixed and stirred for 6h, and the setting stirring rate was 400r / min; wherein the weight-average molecular weight of the maleic anhydride-acrylic acid copolymer was 4000.

[0036] (3) Cool the mixed solution to room temperature to prepare anti-adsorption type concrete glue reducing agent TC-KJ-03.

[0037] (4) The above-prepared anti-a...

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Abstract

The invention provides an anti-adsorption type concrete glue reducer. The raw materials of the glue reducer are proportioned according to the following parts by mass: 4-6 parts of leveling and water-retaining agent TC-LPB, 7-9 parts of phosphoric acid ester, and organic phosphine chelating agent 4-6 parts, maleic anhydride-acrylic acid copolymer 4-6 parts, sodium formate 5-7 parts, sodium thiocyanate 7-10 parts, triethanolamine or tripropanolamine 25-35 parts, water 30-40 parts. Compared with the prior art, the glue reducing agent obviously improves the workability of freshly mixed concrete, improves the strength of concrete, reduces the amount of cement in the concrete, and has a simple preparation process, easy operation, safety and environmental protection.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to an anti-adsorption type concrete glue reducer and application thereof. Background technique [0002] Concrete glue reducer is a comprehensive concrete admixture composed of polymer surfactants, also known as synergists. The main mechanism of action of the glue reducer is to achieve efficient dispersion of cement clinker, reduce the occurrence of mineral agglomeration, provide a particle hydration environment, and accelerate the cement hydration process by adjusting and controlling the dispersion effect of each mineral in the cement clinker. It can improve the workability of concrete and increase the overall amount of concrete, thereby reducing the amount of cement and ensuring the later strength development of concrete. [0003] Polycarboxylate superplasticizer has extremely high sensitivity to adsorbent materials (mud or stone powder) in concrete. When the content o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/38
CPCC04B40/0039C04B24/26C04B2103/302C04B24/383C04B24/003C04B24/04C04B22/14C04B24/122
Inventor 钟佳墙李晓倩徐双林杨国武王杰苟杰郑成华田鑫张凯迪王昆刘伦均红
Owner 西安同成建筑科技有限责任公司
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