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Anti-cracking antifreezing agent for concrete

An antifreeze and concrete technology, applied in the field of concrete admixtures, can solve the problems of poor antifreeze and anti-cracking effects, and achieve the effects of avoiding rapid loss of heat energy, lowering the freezing point, and improving the effect of dewatering and antifreezing

Inactive Publication Date: 2019-11-08
莫介勇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide an anti-crack anti-freeze for concrete in view of the poor anti-freeze and anti-crack effect of the commonly used concrete anti-freeze

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] Preparation of peel treatment material: according to the mass ratio of 1:3~6, take the pomegranate peel and pomelo peel and crush them through a 100-mesh sieve in a pulverizer, take the sieved particles and mix them with reagent A according to the mass ratio of 1:8~15, and mix them at 400~700r / min magnetic stirring for 30~55min, filter, take the filter residue and wash it with water for 2~4 times, then take the filter residue and dry it in an oven at 70~90°C for 4~8h to obtain a dried product. : Add mixed enzyme solution at 20~30°C, stir magnetically at 350~550r / min for 1~3h, heat up to 90~100°C and inactivate enzyme for 10~15min to obtain enzymatic hydrolyzed material, filter the enzymatically hydrolyzed material, take the filtrate and press The mass ratio is 7~10:1, add auxiliary materials, mix and stir, after standing still for 15~30min, move to the rotary evaporator, at 45~55℃, at 120~180r / min speed, 800~900Pa pressure conditions, rotary evaporation concentration 4~...

Embodiment 1

[0040] Reagent A: Mix sodium carbonate and sodium hydroxide solution with a mass fraction of 10% at a mass ratio of 1:8 to obtain reagent A.

[0041] Reagent B: Mix 8% acetic acid solution and dopamine hydrochloride at a mass ratio of 14:1 to obtain Reagent B.

[0042] Auxiliary materials: Mix dimethyltetradecylamine and polyvinyl alcohol in a mass ratio of 1:4 to obtain auxiliary materials.

[0043] Rubber material: Mix peach gum, xanthan gum, and shellac at a mass ratio of 3:1:1 to obtain the rubber material.

[0044] Mixed enzyme solution: in parts by mass, 1 part of cellulase, 1 part of pectinase and 400 parts of sterile water are mixed to obtain the mixed enzyme solution.

[0045] Modified zeolite: in parts by weight, get 15 parts of ferric chloride hexahydrate, 10 parts of sodium citrate, 80 parts of ethylene glycol, 20 parts of zeolite, 20 parts of sodium acetate, first mix ferric chloride hexahydrate, Add sodium citrate, ethylene glycol and zeolite into a polytetrafl...

Embodiment 2

[0056] Reagent A: Mix sodium carbonate and sodium hydroxide solution with a mass fraction of 10% at a mass ratio of 1:12 to obtain reagent A.

[0057] Reagent B: Mix 8% acetic acid solution and dopamine hydrochloride at a mass ratio of 18:1 to obtain Reagent B.

[0058] Auxiliary material: Mix dimethyltetradecylamine and polyvinyl alcohol at a mass ratio of 1:6 to obtain the auxiliary material.

[0059] Rubber material: Mix peach gum, xanthan gum, and shellac at a mass ratio of 5:1:1 to obtain the rubber material.

[0060] Mixed enzyme solution: in parts by mass, 3 parts of cellulase, 3 parts of pectinase and 450 parts of sterile water are mixed to obtain the mixed enzyme solution.

[0061] Modified zeolite: in parts by weight, get 20 parts of ferric chloride hexahydrate, 15 parts of sodium citrate, 90 parts of ethylene glycol, 24 parts of zeolite, 25 parts of sodium acetate, first mix ferric chloride hexahydrate, Add sodium citrate, ethylene glycol and zeolite into a polyte...

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Abstract

The invention discloses an anti-cracking antifreezing agent for concrete, and belongs to the technical field of concrete admixtures. In the process of modified treatment of zeolite, a porous structureof the zeolite adsorbs ferroferric oxide generated by reaction, the ferroferric oxide can serve as a photothermal conversion medium, outside light energy can be converted into thermal energy, the antifreezing effect is improved, raw materials such as shaddock peel and pomegranate peel are subjected to operation such as crushing, alkaline leaching and enzymolysis, thus a large number of active groups such as hydroxyl in the fruit peel is exposed, polyvinyl alcohol is added, thus the polyvinyl alcohol can spontaneously form a layer of polyvinyl alcohol film, and quick forming of a heat-preservation film after mixing of concrete is facilitated. Pores in the zeolite can be filled with various added metal salt, in the concrete using process, water can quickly act with the zeolite and is subjected to hydration reaction with metal salt inside the zeolite, and the sufficient antifreezing intensity is reached in the specified time. According to the anti-cracking antifreezing agent, the problemthat a current commonly-used concrete antifreezing agent is poor in antifreezing and anti-cracking effect is solved.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, in particular to an anti-crack and antifreeze agent for concrete. 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 to drop, when the water in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B20/02C04B14/04C04B103/60
CPCC04B20/023C04B40/0039C04B2103/601C04B22/16C04B24/32C04B22/085C04B24/02C04B24/18C04B2103/302C04B24/00C04B24/121C04B24/2623C04B24/38C04B14/308C04B14/303C04B22/064C04B14/047C04B24/124C04B24/126C04B14/06C04B14/304C04B22/12
Inventor 莫介勇
Owner 莫介勇
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