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Composite antifreezing agent of concrete for rush-repair engineering

A technology for concrete and antifreeze, applied in the field of concrete admixtures, can solve the problems of affecting the strength of concrete, slow concrete setting speed, etc., and achieve the effects of improving early strength, improving hydration, and shortening setting and hardening time

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

[0003] Concrete used in emergency repair projects requires concrete to have high strength and setting speed in the early stage of setting, but at low temperature, the setting speed of concrete is slow, which affects the strength of concrete

Method used

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  • Composite antifreezing agent of concrete for rush-repair engineering

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preparation example Construction

[0015] The present invention also provides a kind of preparation method of the composite antifreeze agent for the concrete of emergency repair project, and the steps are as follows:

[0016] (1) Disperse graphene oxide GO, dicyclohexylcarbodiimide DCC, tributyl phosphate and silane coupling agent in water and ultrasonically disperse evenly, and then react under stirring conditions at 60-120°C for 6 ~12h, modified GO was obtained after centrifugal washing and drying;

[0017] (2) Disperse the modified GO in a mixed solvent of formic acid, water and ethanol, then react at 30-120°C for 5-24 hours, centrifuge, wash and dry to obtain a graphene oxide-silica composite, labeled as GO- SiO 2 ;

[0018] (3) The alkyl organic amine, triterpene saponin, initiator, acrylamide, surfactant, GO-SiO 2 Mix evenly in water, then heat up to 60-80°C, then ultrasonicate for 30-60min at an ultrasonic frequency of 40-50KHz, then add diatomaceous earth, sodium hexametaphosphate, sodium sulfate, ca...

Embodiment 1

[0021] (1) 6g of graphene oxide GO, 8g of dicyclohexylcarbodiimide DCC, 6g of tributyl phosphate and 1g of γ-methacryloxypropyltrimethoxysilane were dispersed in water and ultrasonically dispersed, and then stirred Under the condition of 80℃, the reaction was carried out for 10h, and the modified GO was obtained after centrifugal washing and drying;

[0022] (2) Disperse the modified GO in a mixed solvent of 0.5g formic acid, water and 25g ethanol, then react at 100°C for 6h, centrifuge, wash and dry to obtain a graphene oxide-silica composite, labeled as GO-SiO 2 ;

[0023] (3) 2g diethanolamine, 0.8g triterpene saponin, 3g thioglycolic acid, 10g acrylamide, 0.3g cetyltriethylammonium chloride, the above GO-SiO 2 Mix evenly in water, then heat up to 60-80°C, then ultrasonicate for 30-60min at an ultrasonic frequency of 40-50KHz, then add 15g of diatomaceous earth, 3g of sodium hexametaphosphate, 5g of sodium sulfate, and 4g of lignosulfonate Calcium acid calcium, 5g sodium ...

Embodiment 2

[0025] (1) 5g graphene oxide GO, 6g dicyclohexylcarbodiimide DCC, 5g tributyl phosphate and 0.5g gamma-glycidyl etheroxypropyltrimethoxysilane are dispersed in water and ultrasonically dispersed, and then stirred Under the same conditions, the reaction was carried out at 100°C for 8 hours, and the modified GO was obtained after centrifugal washing and drying;

[0026] (2) Disperse the modified GO in a mixed solvent of 0.2g formic acid, water and 20g ethanol, then react at 60°C for 12h, centrifuge, wash and dry to obtain a graphene oxide-silica composite, labeled as GO-SiO 2 ;

[0027] (3) 2g triisopropanolamine, 0.8g triterpene saponin, 2g mercaptoacetic acid, 10g acrylamide, 0.5g cetyltriethylammonium chloride, the above GO-SiO 2 Mix evenly in water, then raise the temperature to 60-80°C, then ultrasonicate for 30-60min at an ultrasonic frequency of 40-50KHz, then add 12g of diatomaceous earth, 5g of sodium hexametaphosphate, 6g of sodium sulfate, and 3g of lignosulfonate C...

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Abstract

The invention relates to the technical field of concrete admixtures, in particular to a composite antifreezing agent of concrete for rush-repair engineering. The composite antifreezing agent is prepared from, by weight, 10-20 parts of diatomite, 3-10 parts of tributyl phosphate, 2-8 parts of sodium hexametaphosphate, 3-6 parts of sodium sulfate, 2-10 parts of oxidized graphene, 5-12 parts of dicyclohexyl carbodiimide, 1-5 parts of alkyl organic amine, 0.2-1 part of triterpenoid saponis, 2-5 parts of initiator, 6-12 parts of acrylamide, 0.2-1 part of surfactant, 2-8 parts of calcium lignosulfonate, 3-8 parts of aminosulfonate, 8-10 parts of sodium gluconate, 0.2-2 parts of silane coupling agent, 0.1-1 part of formic acid and 20-30 parts of alcohol. The composite antifreezing agent can accelerate setting speed of the concrete at minus 20 DEG C and improve strength and durability of the concrete.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a composite antifreeze agent for concrete used in emergency repair projects. Background technique [0002] The reason why the concrete mixture can gradually set and harden after pouring until the final strength is obtained is the result of cement hydration. The speed of cement hydration is not only related to the composition of the concrete itself and the mix ratio, but also closely related to the external temperature. When the temperature rises, the hydration is accelerated, and the strength growth is accelerated, and when the temperature drops to 0°C, a part of the water in the concrete begins to freeze, and gradually changes from a liquid phase (water) to a solid phase (ice). , At this time, the water participating in the cement hydration is reduced, the hydration is slowed down, and the strength growth is correspondingly slowed down. As the temperature continues...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42C04B103/60
CPCC04B40/0039C04B2103/601C04B14/08C04B24/003C04B22/16C04B22/147C04B14/024C04B24/121C04B24/00C04B24/124C04B24/18C04B24/16C04B24/10C04B24/42C04B24/04C04B24/026C04B24/005
Inventor 承忠富
Owner 芜湖恒固混凝土材料有限公司
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