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Efficient concrete retarding water reducing agent preparation method

A slow-setting water-reducing agent and concrete technology, which is applied in the field of retarding water-reducing agents, can solve the problems of shortening the setting time of cement, accelerating the hydration speed of cement, and not obvious retarding effect, etc.

Inactive Publication Date: 2018-10-16
芜湖恒固混凝土材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing retarding superplasticizer is difficult to form an insoluble film on the surface of cement particles, which is difficult to act as a barrier to the hydration of cement and hinders the normal hydration of cement. These will lead to faster hydration of cement, or slow down The coagulation effect is not obvious, shortening the normal setting time of cement

Method used

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  • Efficient concrete retarding water reducing agent preparation method
  • Efficient concrete retarding water reducing agent preparation method
  • Efficient concrete retarding water reducing agent preparation method

Examples

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preparation example Construction

[0015] The present invention also provides a preparation method of the high-efficiency concrete retarding water reducer, comprising the following steps:

[0016] (1) Add sodium polyaspartate, p-aminobenzenesulfonic acid and polyethylene glycol monoethyl ether to polyaluminum chloride, then stir at 105-125°C for 0.5-1.5h, then place at 0-5°C Put it under seal and let it stand for 1-2h, and make fine powder through ultrafine pulverizer to obtain modified polyaluminum chloride;

[0017] (2) After mixing polycarboxylic acid mother liquor, sodium gluconate, maltodextrin polyacrylamide graft copolymer, chitin, ammonium citrate in the mixed solution of water and acetone, adjust the pH value of the mixed system to 6.5 -7.5, then stirred at 80-100°C for 20-30min, then cooled naturally to room temperature, then added asbestos wool, modified polymeric alumina, anhydrous sodium sulfate and calcium chloride to the mixed system, and mixed evenly, that is Get retarded superplasticizer.

[...

Embodiment 1

[0022] (1) Add 1.5g sodium polyaspartate, 3g p-aminobenzenesulfonic acid and 8g polyethylene glycol monoethyl ether to 4g polyaluminum chloride, then stir at 105-125°C for 0.5-1.5h, then set Seal and stand at 0-5°C for 1-2h, and make a fine powder through an ultrafine pulverizer to obtain modified polyaluminum chloride;

[0023] (2) 50g polyether polycarboxylic acid mother liquor (solid content is 55-75wt%, purchased from Ruitai Chemical Products Firm), 10g sodium gluconate, 5g maltodextrin polyacrylamide graft copolymer, 6g chitin After mixing 15g of ammonium citrate in a mixed solution of 45g of water and 5g of acetone, adjust the pH value of the mixed system to 6.5-7.5, then stir at 80-100°C for 20-30min, then cool naturally to room temperature, and then add Add 3g of asbestos wool, modified polyalumina, 5g of anhydrous sodium sulfate and 3g of calcium chloride into the mixing system, and mix evenly to obtain a retarded water reducer.

[0024] The preparation method of the...

Embodiment 2

[0026] (1) Add 0.5g sodium polyaspartate, 1g p-aminobenzenesulfonic acid and 6g polyethylene glycol monoethyl ether to 3g polyaluminum chloride, then stir at 105-125°C for 0.5-1.5h, then set Seal and stand at 0-5°C for 1-2h, and make a fine powder through an ultrafine pulverizer to obtain modified polyaluminum chloride;

[0027] (2) 42g polyester polycarboxylic acid mother liquor (solid content is 55-75wt%, purchased from Ruitai Chemical Products Firm), 8g sodium gluconate, 3g maltodextrin polyacrylamide graft copolymer, 5g chitin After mixing 12g of ammonium citrate in a mixed solution of 50g of water and 5g of acetone, adjust the pH value of the mixed system to 6.5-7.5, then stir at 80-100°C for 20-30min, then cool naturally to room temperature, and then add Add 2g of asbestos wool, modified polyalumina, 4g of anhydrous sodium sulfate and 4g of calcium chloride into the mixing system, and mix evenly to obtain a retarded water reducer.

[0028]The preparation method of the m...

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Abstract

The invention relates to the technical field of retarding water reducing agents, in particular to an efficient concrete retarding water reducing agent preparation method which includes the steps: (1)adding sodium polyaspartate, p-aminophenylsulfonic acid and polyethylene glycol mono-ether into poly aluminum chloride, stirring mixture for 0.5-1.5h at the temperature of 105-125 DEG C, and performing sealing and standing for 1-2h at the temperature of 0-5 DEG C to obtain modified poly aluminum chloride; (2) uniformly mixing polycarboxylate mother liquor, sodium gluconate, maltodextrin polyacrylamide grafting copolymers, chitin and ammonium citrate in mixed solution of water and acetone, adjusting a pH (potential of hydrogen) value of a mixed system to reach 6.6-7.5, stirring mixture for 20-30min at the temperature of 80-100 DEG C, and adding asbestos wool, the modified poly aluminum chloride, anhydrous sodium sulfate and calcium chloride after cooling to obtain the retarding water reducing agent. The water reducing agent prepared by the method has the advantages that the water reducing agent is wide in adding range, low in concrete shrinkage ratio, green, environmentally friendly andthe like.

Description

technical field [0001] The invention relates to the technical field of retarding water-reducing agents, in particular to a preparation method of high-efficiency concrete retarding and water-reducing agents. Background technique [0002] At present, commercial concrete and pumping construction technology are mostly used for concrete. Commodity concrete is also called centralized mixing concrete, that is, the concrete mixed in the traditional on-site construction site is gathered together to set up a mixing station, and the concrete mixed by it is transported to the construction site by a mixer truck, and then transported to the building by a pump truck through a pump pipe. At the construction level, if there is no retarding treatment, especially in high temperature weather in summer, the moisture will evaporate quickly, and the concrete will harden and cannot be used even before it is transported to the construction site, so it is necessary to add a retarder when mixing the c...

Claims

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Application Information

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IPC IPC(8): C04B24/38C04B103/22C04B103/30
CPCC04B40/0039C04B2103/22C04B2103/302C04B22/12C04B24/28C04B24/20C04B24/10C04B24/2652C04B24/06C04B24/008C04B22/147C04B22/124C04B22/06C04B14/40C04B24/38
Inventor 承忠富
Owner 芜湖恒固混凝土材料有限公司
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