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Anti-cracking and heat-insulating regenerated rubber mortar and preparation method thereof

A technology of recycled rubber and mortar, which is applied in the field of building materials to achieve the effects of tight combination, enhanced crack resistance, and strong interface bonding

Active Publication Date: 2022-06-14
GUANGDONG UNIV OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a crack-resistant and heat-preserving regenerated rubber mortar and its preparation method to solve the problem of how to improve the crack resistance and heat-preservation performance of the mortar

Method used

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  • Anti-cracking and heat-insulating regenerated rubber mortar and preparation method thereof
  • Anti-cracking and heat-insulating regenerated rubber mortar and preparation method thereof

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preparation example Construction

[0042] The preparation method of the recycled rubber mortar of anti-crack insulation described above, comprising the following steps:

[0043] S1: Put the rubber powder into sodium hydroxide solution and soak it for 1-48h after cleaning the surface of the rubber powder with water, remove the surface moisture, and set aside after the rubber powder surface is dried;

[0044] S2: Add the rubber powder treated in step S1 to the grinder, and then add the silane coupling agent, grind for 0.1-10h, so that the rubber powder and the silane coupling agent are in full contact;

[0045] S3: The cement mortar and step S2 rubber powder and silane coupling agent mixture stirred evenly, and then add nano silica, water reducer, cationized fiber, modified sepiolite, water, stirring 0.5-100min, pouring specimens, and at a temperature of 15-40 °C, relative humidity greater than 85% condition maintenance 0.5-5d, continue to maintain after demolding, rubber mortar.

Embodiment 1

[0051] A kind of recycled rubber mortar with anti-crack insulation, in terms of weight: 110 parts of cement mortar, 25 parts of rubber powder, 1.8 parts of silane coupling agent, 8 parts of sodium hydroxide solution, 4 parts of nano silica, 2 parts of superplasticizer, 2 parts of cationized cellulose, and 3 parts of modified sepiolite.

[0052] The rubber powder particle size is 0.5-50 microns.

[0053] The silane coupling agent is KH560.

[0054] The sodium hydroxide concentration is 40% of the aqueous solution.

[0055] The superplasticizer is a polycarboxylic acid high performance superplasticizer.

[0056] The preparation method of the recycled rubber mortar of anti-crack insulation described above, comprising the following steps:

[0057] S1: Put the rubber powder into sodium hydroxide solution for 24h and then clean the surface of the rubber powder with water, remove the surface moisture, and wait for the surface of the rubber powder to dry until the moisture content is less...

Embodiment 2

[0061] A kind of anti-crack insulation recycled rubber mortar, by weight: cement mortar 100 parts, rubber powder 28 parts, silane coupling agent 1.6 parts, sodium hydroxide solution 8 parts, nano silica 3 parts, water reducer 3 parts, cationized cellulose 2 parts, modified sepiolite 3 parts.

[0062] The rubber powder particle size is 0.5-50 microns.

[0063] The silane coupling agent is KH570.

[0064] The sodium hydroxide concentration is 40%.

[0065] The superplasticizer is a polycarboxylic acid high performance superplasticizer.

[0066] The preparation method of the recycled rubber mortar of anti-crack insulation described above, comprising the following steps:

[0067] S1: Put the rubber powder into sodium hydroxide solution for 24h and then clean the surface of the rubber powder with water, remove the surface moisture, and wait for the surface of the rubber powder to dry until the moisture content is less than 20% after the backup;

[0068] S2: Add the rubber powder treate...

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Abstract

The invention discloses anti-cracking and heat-insulating regenerated rubber mortar and a preparation method thereof, and belongs to the technical field of building materials. The regenerated rubber mortar is prepared from the following components in parts by weight: 100 to 120 parts of cement mortar, 20 to 28 parts of rubber powder, 1.5 to 2.0 parts of silane coupling agent, 0.1 to 10 parts of sodium hydroxide solution, 1 to 4 parts of nano silicon dioxide, 1 to 3 parts of water reducing agent, 0.5 to 3 parts of cationized fiber and 0.3 to 7 parts of modified sepiolite. The preparation method of the regenerated rubber mortar comprises the following steps: putting the rubber powder into a sodium hydroxide solution, cleaning, drying, grinding the rubber powder and the silane coupling agent, adding the nano silicon dioxide, the water reducing agent and the water, stirring, and curing. The prepared mortar has excellent compressive strength, crack resistance and heat preservation performance.

Description

Technical field [0001] The present invention belongs to the technical field of building materials, specifically relates to a kind of crack-resistant thermal insulation of recycled rubber mortar and preparation method thereof. Background [0002] Concrete is an uneven multi-component material, when subjected to external forces, due to stress concentration, micro-cracks will occur, resulting in damage to the concrete structure. The waste tire is made into rubber powder and added to the concrete in a certain amount, which can inhibit the generation of internal micro-cracks, absorb part of the vibration energy, and improve the impact resistance of concrete. But current research suggests that the incorporation of rubber reduces the strength of concrete. Practice has proved that the service life of rubber-modified concrete is equivalent to 2 times that of ordinary concrete. In 2000, two rubber-doped asphalt concrete roads were built in Taiwan Province. After four years of use, the rubb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/22C04B20/02C04B14/04C04B18/24C04B18/26C04B111/34
CPCC04B28/00C04B18/22C04B20/023C04B2111/343C04B2201/50C04B2201/32C04B24/42C04B22/062C04B14/062C04B2103/302C04B18/24C04B18/26C04B14/042Y02W30/91
Inventor 熊哲张建文卢锦龙卢锦智郑广育方震王嘉晖
Owner GUANGDONG UNIV OF TECH
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