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Environment-friendly concrete retarder and preparation method thereof

An environmentally friendly concrete and retarder technology, applied in the field of concrete additives, can solve the problems of short retardation time and reduce the strength of the base layer, and achieve the effects of high preparation efficiency, good performance stability and small dosage

Inactive Publication Date: 2021-02-26
陈小龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned retarder can prolong the molding time of the mixture of cement-stabilized pavement base to more than 6 hours, the retarding time is relatively short when used in concrete
In addition, excessive dosage will reduce the strength of the base

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] An environment-friendly concrete retarder is characterized in that it comprises the following components in parts by weight: 8 parts of 3-trimethylolmethylamine-2-hydroxypropanesulfonic acid modified phosphonic acid terminal hyperbranched dendrimers 15 parts of N-trimethylolmethacrylamide / tetrahydroxystilbene / caffeic acid copolymer, 0.5 part of copper fluorosilicate, 1 part of sodium alginate, 30 parts of water.

[0031]The preparation method of the N-trimethylolmethacrylamide / tetrahydroxystilbene glycoside / caffeic acid copolymer comprises the steps of: mixing N-trimethylolmethacrylamide, tetrahydroxystilbene glycoside , caffeic acid, and initiator were added to the high-boiling point solvent, stirred and reacted at 65°C for 3 hours in a nitrogen atmosphere, and then precipitated in acetone, and finally the precipitated polymer was dried in a vacuum oven at 80°C to constant weight , to obtain N-trimethylolmethacrylamide / tetrahydroxystilbene / caffeic acid copolymer; said ...

Embodiment 2

[0039] An environment-friendly concrete retarder is characterized in that it comprises the following components in parts by weight: 9 parts of 3-trimethylolmethylamine-2-hydroxypropanesulfonic acid modified phosphonic acid end group hyperbranched dendrimers 16 parts of N-trimethylolmethacrylamide / tetrahydroxystilbene / caffeic acid copolymer, 0.7 parts of copper fluorosilicate, 1.5 parts of sodium alginate, 33 parts of water.

[0040] The preparation method of the N-trimethylolmethacrylamide / tetrahydroxystilbene glycoside / caffeic acid copolymer comprises the steps of: mixing N-trimethylolmethacrylamide, tetrahydroxystilbene glycoside , caffeic acid, and initiator were added to the high-boiling point solvent, stirred and reacted at 67°C for 3.5 hours in an inert gas atmosphere, and then precipitated in acetone, and finally the precipitated polymer was dried in a vacuum oven at 83°C until constant Heavy, obtain N-trimethylol methacrylamide / tetrahydroxy stilbene / caffeic acid copoly...

Embodiment 3

[0048] An environment-friendly concrete retarder is characterized in that it comprises the following components in parts by weight: 10 parts of 3-trimethylolmethylamine-2-hydroxypropanesulfonic acid modified phosphonic acid terminal hyperbranched dendrimers 17 parts of N-trimethylolmethacrylamide / tetrahydroxystilbene / caffeic acid copolymer, 1 part of copper fluorosilicate, 2 parts of sodium alginate, 35 parts of water.

[0049] The preparation method of the N-trimethylolmethacrylamide / tetrahydroxystilbene glycoside / caffeic acid copolymer comprises the steps of: mixing N-trimethylolmethacrylamide, tetrahydroxystilbene glycoside , caffeic acid, and initiator were added to the high-boiling solvent, stirred and reacted at 70°C for 4 hours in an inert gas atmosphere, and then precipitated in acetone, and finally the precipitated polymer was dried in a vacuum oven at 85°C until constant Heavy, obtain N-trimethylol methacrylamide / tetrahydroxy stilbene / caffeic acid copolymer; The N-tr...

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PUM

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Abstract

The invention discloses an environment-friendly concrete retarder and a preparation method thereof. The concrete retarder comprises the following components in parts by weight: 8-12 parts of a 3-[N-Tris(hydroxymethyl)methylamino]-2-hydroxypropanesulfonic acid-modified phosphonic acid-terminated hyperbranched dendritic polymer, 15-20 parts of an N-acryloyltris(hydroxymethyl)aminomethane / tetrahydroxystilbene glucoside / caffeic acid copolymer, 0.5-1.5 parts of copper fluosilicate, 1-3 parts of sodium alginate and 30-40 parts of water. The invention also discloses a preparation method of the environment-friendly concrete retarder. The environment-friendly concrete retarder disclosed by the invention is good in comprehensive performance, low in mixing amount, remarkable in retarding effect, small in negative influence on the comprehensive performance of concrete, good in performance stability, safe to use and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of concrete additives, in particular to an environmentally friendly concrete retarder and a preparation method thereof. Background technique [0002] With the acceleration of the country's large-scale infrastructure construction, the concrete material industry has developed by leaps and bounds, putting forward higher requirements for the comprehensive performance of concrete, which will inevitably lead to the development of higher performance concrete admixtures. Retarder is a commonly used concrete admixture, which can delay the setting and hardening of cement, delay the appearance of hydration temperature peak, reduce the hydration temperature peak, and prevent temperature cracks in large-volume concrete; The adaptability of the cement reduces the slump loss of the concrete mixture and keeps the fresh concrete plastic for a long time, thus facilitating the transportation and pouring of the concrete. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42C08F220/04C08F220/58C08F212/32C08G83/00C04B103/22
CPCC04B40/0039C08F220/04C08G83/006C04B2103/22C08F220/58C08F212/32C04B24/28C04B24/2688C04B24/42C04B24/06
Inventor 陈小龙
Owner 陈小龙
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