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A zero-constrained shrinkage high temperature resistant resin concrete and its preparation method

A technology of high-temperature-resistant resin and concrete, applied in the field of high-temperature-resistant resin concrete, can solve the problems of poor high-temperature resistance performance of resin concrete, large shrinkage of resin concrete, inability to realize large-volume and large-area on-site pouring, etc. Increase the effect of stress relaxation and solve the problem of volume instability

Active Publication Date: 2022-05-20
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a zero-constraint shrinkage high-temperature resistant resin concrete and its preparation method to solve the problem that the resin concrete mentioned in the background technology has a large shrinkage and cannot realize large-volume and large-area on-site pouring in actual engineering
At the same time, solve the problem of poor high temperature resistance of resin concrete, and improve the vibration resistance and energy absorption effect of existing resin concrete

Method used

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preparation example Construction

[0030] A zero-constraint shrinkage high temperature resistant resin concrete and a preparation method thereof, comprising the following steps:

[0031] S1: Carry out close packing experiments and theoretical calculations of aggregates to determine the dosage of various aggregates;

[0032] S2: put the coarse aggregate, sand, fly ash, heat-resistant filler, waste rubber particles and waste rubber powder into the drying box to dry, after cooling, accurately weigh the coarse aggregate, sand and various fillers, and then stir well mixed;

[0033] S3: Stir the resin, accelerator and curing agent for 2 to 10 minutes, and mix well;

[0034] S4: Pour the mixed aggregates, fillers and chopped fibers into a mixer and continue stirring for 2-8 minutes. After stirring evenly, a lightweight resin concrete with zero restraint shrinkage and high corrosion resistance is prepared.

Embodiment 1

[0037] 13.0% resin system, 43.3% lightweight porous coarse aggregate, 32.4% sand, 5.8% fly ash, 2.0% heat-resistant filler, 2.0% waste rubber particles, 1.2% waste rubber powder and 0.3% chopped fiber.

[0038] Preparation method: put lightweight porous coarse aggregate, sand, fly ash, heat-resistant filler, waste rubber particles and waste rubber powder into a drying oven to dry, and after cooling, accurately weigh the mass of various coarse aggregates and fillers , mix and stir evenly; then stir the resin, accelerator and curing agent for 5 minutes, and mix well; pour the mixed aggregates, fillers and chopped fibers into the mixer and continue stirring for 5 minutes, and then get zero restraint shrinkage after stirring evenly High temperature resistant resin concrete.

Embodiment 2

[0040] 14.0% resin system, 42.8% lightweight porous coarse aggregate, 27.9% sand, 5.8% fly ash, 2.0% heat-resistant filler, 6.0% waste rubber particles, 1.2% waste rubber powder and 0.3% chopped fiber.

[0041] Preparation method: put lightweight porous coarse aggregate, sand, fly ash, heat-resistant filler, waste rubber particles and waste rubber powder into a drying oven to dry, and after cooling, accurately weigh the mass of various coarse aggregates and fillers , mix and stir evenly; then stir the resin, accelerator and curing agent for 5 minutes, and mix well; pour the mixed aggregates, fillers and chopped fibers into the mixer and continue stirring for 5 minutes, and then get zero restraint shrinkage after stirring evenly High temperature resistant resin concrete.

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Abstract

The invention provides a zero-constraint shrinkage high temperature resistant resin concrete and a preparation method thereof, comprising: 10.0% to 18.0% of a high temperature resistant resin system (including resin, curing agent and accelerator), 40.0% to 48.0% of lightweight porous coarse aggregate, Sand 15.0%-32.0%, fly ash 4.0%-7.0%, heat-resistant filler 0.5%-3.0%, waste rubber particles 0.0%-15.0%, waste rubber powder 0.2%-2.0%, and chopped fiber 0.1%-8.0% %. The invention increases the high temperature resistance of resin concrete by using high temperature resistant resin and heat resistant filler; by adding lightweight aggregate, waste rubber particles and waste rubber powder, it can reduce the early free shrinkage of resin concrete and the shrinkage under restraint conditions Prolong the curing time of resin in resin concrete, increase the stress relaxation of resin concrete, greatly reduce the shrinkage strain of concrete under constraint conditions and prevent the early non-load cracks of resin concrete, and solve the volume instability caused by the large early curing shrinkage of resin concrete Problems, while also improving the anti-vibration and energy-absorbing characteristics of resin concrete.

Description

technical field [0001] The invention relates to a zero-constraint-shrinkage high-temperature-resistant resin concrete and a preparation method thereof, in particular to a high-temperature-resistant resin concrete with negligible constraint shrinkage in severe corrosion environments and excellent mechanical properties and durability. Background technique [0002] In the harsh environment of high temperature and strong corrosion such as the anti-corrosion layer of the desulfurization tower of the power plant, the durability of cement concrete can no longer meet the needs of the project. Resin concrete has excellent corrosion resistance and durability under the condition of not being directly exposed to ultraviolet rays, as well as high mechanical properties such as stiffness and strength, and has a very wide application prospect in engineering under harsh environments. However, resin concrete has the disadvantage of large solidification shrinkage, and it is impossible to reali...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/04C04B26/12C04B26/10C04B111/34
CPCC04B26/045C04B26/122C04B26/105C04B2201/50C04B2111/34C04B18/027C04B14/06C04B18/08C04B18/22C04B18/141C04B18/023C04B14/303C04B14/041C04B14/42C04B14/4643C04B16/0633C04B16/06C04B14/48C04B14/386C04B2103/0068
Inventor 吕建福沈亦农黄建涛马小兵郝璠
Owner HARBIN ENG UNIV
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