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Preparation method and application of modified rubber particles, frost-resistant permeable concrete and its application, and frost-resistant permeable brick and its preparation method

A technology of permeable concrete and modified rubber, applied in the field of frost-resistant permeable concrete, frost-resistant permeable bricks and their preparation fields, can solve the problems of reduced concrete bonding force, reduced compressive strength, poor bonding degree, etc., and can increase the surface area. Toughness, strong bonding, and the effect of enhancing compressive and flexural strength

Active Publication Date: 2021-03-26
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The permeable concrete has a certain frost resistance by doping rubber particles in the concrete, but because the rubber particles themselves are poorly bonded to the concrete, and the rubber particles contain zinc stearate, the bonding force with the concrete is further reduced , leading to a decrease in compressive strength
In the prior art, the bonding force between rubber particles and concrete is usually improved by carrying out alkaline solution or hot water treatment on rubber particles to remove zinc stearate on its surface, but the bonding force between rubber particles and concrete is still poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] The invention provides a kind of preparation method of modified rubber particle, comprises the steps:

[0023] Mixing the rubber particles and a surface treatment agent for surface coating treatment to obtain rubber particles coated with a surface treatment agent; the surface treatment agent includes the following components by weight: 15 to 35 parts of water glass, 2 parts by weight of silicon phosphate ~6 parts, 50~75 parts of silica powder, 0.1~1 part of urea, 0.1~2 parts of hydroxypropyl methylcellulose, described water glass is sodium silicate aqueous solution or potassium silicate aqueous solution, the quality of described water glass The concentration is 10-55%;

[0024] The rubber particles coated with the surface treatment agent are subjected to curing reaction at 40-60° C. for 1-3 hours to obtain modified rubber particles.

[0025] The invention mixes the rubber particles and the surface treatment agent, performs surface coating treatment, and obtains the rub...

Embodiment 1

[0062] (1) Preparation of modified rubber particles:

[0063] According to parts by weight, 24 parts of water glass (sodium silicate aqueous solution, mass concentration is 30%, Baume degree is 35.2°Bé), 4 parts of silicon phosphate, 71.4 parts of silica powder (particle diameter ≥ 325 mesh), urea 0.3 parts are mixed with 0.3 parts of hydroxypropyl methylcellulose to obtain a surface treatment agent;

[0064] Mix waste tire rubber particles (elastic modulus of 0.02GPa, particle size of 0.5-0.9mm) and the surface treatment agent according to the mass ratio of 1:2 at a speed of 30rpm for 2 hours, and then pass through a 20-mesh sieve to obtain Rubber particles coated with a surface treatment agent;

[0065] Curing the rubber particles coated with a surface treatment agent at 50° C. for 3 hours to obtain modified rubber particles;

[0066] (2) Preparation of frost-resistant permeable bricks:

[0067] Mix the following components by weight to obtain the permeable base concrete:...

Embodiment 2

[0074] (1) Preparation of modified rubber particles:

[0075] According to parts by weight, 24 parts of water glass (sodium silicate aqueous solution, mass concentration is 30%, Baume degree is 35.2°Bé), 5 parts of silicon phosphate, 69 parts of silica powder (particle diameter ≥ 325 mesh), urea 0.5 part is mixed with 0.5 part of hydroxypropyl methylcellulose to obtain a surface treatment agent;

[0076]Mix waste tire rubber particles (elastic modulus of 0.025GPa, particle size of 0.9-1.5mm) and the surface treatment agent according to the mass ratio of 1:2.5 at a speed of 30rpm for 2 hours, and then pass through a 14-mesh sieve to obtain Rubber particles coated with a surface treatment agent;

[0077] Curing the rubber particles coated with a surface treatment agent at 60° C. for 2 hours to obtain modified rubber particles;

[0078] (2) Preparation of frost-resistant permeable bricks:

[0079] Mix the following components by weight to obtain the permeable base concrete: 18...

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Abstract

The invention provides a preparation method of modified rubber particles and an application thereof, anti-freezing pervious concrete and an application thereof as well as an anti-freezing pervious brick and a preparation method thereof, which belong to the technical field of pervious building materials. The preparation method comprises the following steps: mixing rubber particles with a surface treating agent, and carrying out surface coating treatment to obtain rubber particles with surfaces coated with the surface treating agent; wherein the surface treating agent comprises the following components in parts by weight: 15-35 parts of water glass, 2-6 parts of silicon phosphate, 50-75 parts of silica powder, 0.1-1 part of urea and 0.1-2 parts of hydroxypropyl methyl cellulose; and carryingout a curing reaction on the rubber particles coated with the surface treating agent at 40-60 DEG C for 1-3 hours to obtain the modified rubber particles. When the obtained modified rubber particlesare used for preparing the frost-resistant water-permeable concrete, the modified rubber particles are high in binding force with other components of the concrete, and the prepared frost-resistant water permeable brick is good in water permeability, high in strength and excellent in frost resistance.

Description

technical field [0001] The invention relates to the technical field of permeable building materials, in particular to a preparation method and application of modified rubber particles, frost-resistant permeable concrete and its application, and frost-resistant permeable brick and its preparation method. Background technique [0002] At present, the pavement material of most cities adopts impermeable pavement such as marble, suet, cement. During the rainy season, a large amount of rainwater accumulates on the road due to the obstruction of the impermeable road surface, causing waterlogging, which seriously affects people's travel; in addition, these precious water resources will flow away with the drainage pipes, which not only increases the burden on the pipes , and the loss of rainwater will lead to the lack of replenishment of groundwater, damage to urban greening, and then cause urban drought, water shortage and other consequences. In order to solve the above problems, p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B20/10C04B18/22E01C5/06E01C11/22C04B111/76
CPCC04B18/22C04B20/1077C04B28/00C04B2111/76C04B2201/50E01C5/065E01C11/225C04B14/06C04B14/02C04B24/383C04B20/1055C04B20/1022C04B20/1048Y02W30/91
Inventor 崔学军窦悦铭高岩
Owner JILIN UNIV
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