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Preparation method of set-retarding water-reducing agent used in high-temperature construction environment

A retarding superplasticizer and high-temperature construction technology, applied in the field of retarding superplasticizers, can solve the problems of shortening cement setting time, accelerating cement hydration speed, and inconspicuous retarding effect, etc.

Inactive Publication Date: 2018-11-16
芜湖恒固混凝土材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Preparation method of set-retarding water-reducing agent used in high-temperature construction environment
  • Preparation method of set-retarding water-reducing agent used in high-temperature construction environment

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preparation example Construction

[0016] The present invention also provides a method for preparing the retarded water reducer used in high-temperature construction environments, comprising the following steps:

[0017] (1) Add sodium polyaspartate, p-aminobenzenesulfonic acid and isomeric tridecyl alcohol polyoxyethylene ether to polyaluminum chloride, heat to 115-125°C and mix for 0.5-1h, then place in 0- Put it in a sealed environment at 5°C for 1-2 hours, and make a fine powder through an ultrafine pulverizer to obtain modified polyaluminum chloride;

[0018] (2) Add kaolin, asbestos wool and modified polyaluminum chloride to the mixed solution of water and acetone, mix well, then add polycarboxylic acid mother liquor, sodium gluconate, methyl-β-cyclodextrin polyacrylamide Branch copolymer, ammonium citrate, anhydrous sodium sulfate and calcium chloride, mixed evenly to get retarded superplasticizer.

[0019] Under optimal conditions, the preparation method of the methyl-β-cyclodextrin polyacrylamide graf...

Embodiment 1

[0033] (1) Add 1g of sodium polyaspartate, 3g of p-aminobenzenesulfonic acid and 1g of isomeric tridecyl alcohol polyoxyethylene ether to 2g of polyaluminum chloride, heat to 120°C and mix for 1h, then place at 0°C Seal and stand in the environment for 1.5h, and make a fine powder with a particle size of 3-5 microns through an ultrafine pulverizer to obtain modified polyaluminum chloride;

[0034] (2) Add 8g kaolin, 2g asbestos wool and the above-mentioned modified polyaluminum chloride to the mixed solution of 40g water and 5g acetone, fully mix, then add 40g polyether polycarboxylic acid mother liquor (solid content is 55-75%) ), 6g of sodium gluconate, 4g of methyl-β-cyclodextrin polyacrylamide graft copolymer, 15g of ammonium citrate, 5g of anhydrous sodium sulfate and 3g of calcium chloride, mix well to get retarded superplasticizer .

[0035] Among them, the content of crystalline kaolinite in kaolin is higher than 80% by weight, quartz is lower than 0.5% by weight, Fe ...

Embodiment 2

[0038] (1) Add 0.5g sodium polyaspartate, 2g p-aminobenzenesulfonic acid and 0.5g isomeric tridecanol polyoxyethylene ether to 1g polyaluminum chloride, heat to 125°C and mix for 1h, then place Put it in a sealed environment at 0-5°C for 2 hours, and make a fine powder with a particle size of 3-5 microns through an ultrafine pulverizer to obtain modified polyaluminum chloride;

[0039] (2) Add 8g kaolin, 2g asbestos wool and modified polyaluminum chloride to the mixed solution of 55g water and 3g acetone, fully mix, then add 40g polyether polycarboxylate mother liquor (solid content is 55-75%) , 6g of sodium gluconate, 2g of methyl-β-cyclodextrin polyacrylamide graft copolymer, 12g of ammonium citrate, 8g of anhydrous sodium sulfate and 5g of calcium chloride, mixed evenly to obtain a retarded superplasticizer.

[0040] Among them, the content of crystalline kaolinite in kaolin is higher than 80% by weight, quartz is lower than 0.5% by weight, Fe 2 o 3 Less than 1.0% by weig...

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Abstract

The invention relates to the technical field of set-retarding water-reducing agents, and particularly relates to a preparation method of a set-retarding water-reducing agent used in a high-temperatureconstruction environment. The preparation method of the set-retarding water-reducing agent used in the high-temperature construction environment comprises the following steps: (1) adding sodium polyaspartate, sulfanilic acid and iso-tridecanol polyoxyethylene ether into polyaluminium chloride, carrying out heating to 115-125 DEG C, carrying out mixing under heat preservation for 0.5-1 hour, thencarrying out sealing and standing in an environment of 0-5 DEG C for 1-2 hours, and preparing a micro-powder from the obtained material by using an ultrafine grinder to obtain modified polyaluminium chloride; and (2) adding kaolin, asbestos wool and the modified polyaluminium chloride into a mixed solution of water and acetone, fully carrying out mixing, then adding a polycarboxylic acid mother liquor, sodium gluconate, a methyl-beta-cyclodextrin polyacrylamide graft copolymer, ammonium citrate, anhydrous sodium sulfate and calcium chloride, and uniformly carrying out mixing to obtain the set-retarding water-reducing agent. The addition amount of the set-retarding water-reducing agent provided by the invention in the concrete is low, and a good economic benefit is achieved.

Description

technical field [0001] The invention relates to the technical field of retarded water reducers, in particular to a preparation method of retarded water reducers used in high-temperature construction environments. 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...

Claims

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Application Information

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IPC IPC(8): C04B24/38C08F251/00C08F220/56C04B103/22C04B103/30
CPCC04B40/0039C04B2103/22C04B2103/302C08F251/00C08F220/56C04B22/12C04B24/38C04B22/08C04B24/24C04B24/10C04B24/06C04B22/147C04B22/124C04B24/20C04B24/32C04B24/2652
Inventor 承忠富
Owner 芜湖恒固混凝土材料有限公司
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