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Concrete hollow building block with junked tire rubber granules and preparation method thereof

A technology of waste tire rubber and hollow blocks, which is applied in the direction of solid waste management, sustainable waste treatment, climate sustainability, etc., can solve the problems of reduced compressive strength of concrete hollow blocks, and improve the binding capacity and binding firmness High degree, low manufacturing cost, and the effect of improving compressive strength

Inactive Publication Date: 2014-09-24
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the introduction of rubber particles into concrete mortar will lead to a substantial reduction in the compressive strength of concrete hollow blocks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Sequentially weigh / measure 375kg of P.O42.5R cement, 134kg of water, 607.2kg of medium-coarse river sand, 1180kg of gravel and / or pebbles; 21.8kg of continuously graded rubber particles, and 2.385kg of water reducing agent;

[0050] First soak the rubber particles in 20% KOH solution for 20 minutes, then wash them with water and dry them in the sun until saturated;

[0051] Add medium-coarse river sand, cement, water reducing agent and rubber particles into the mixer, add water and mix well;

[0052] Add crushed stones and / or pebbles and stir until a mixed concrete slurry is obtained; then put the concrete slurry into a molding machine for molding, and then undergo curing, demoulding, and curing under natural conditions to obtain concrete hollow blocks.

[0053] Test results: the minimum compressive strength of a single concrete hollow block is ≥ 11MPa, and the average compressive strength of 5 concrete hollow blocks is ≥ 13MPa, meeting the compressive standard for load...

Embodiment 2

[0056] Weigh 360kg of ordinary portland cement with the label of 42.5, 129kg of water, 601.3kg of medium-coarse river sand, 1210kg of gravel and / or pebbles; 23.7kg of continuously graded rubber particles, and 2.385kg of water reducing agent;

[0057] All the other steps are the same as in Example 1.

[0058] Test results: the minimum compressive strength of a single concrete hollow block is ≥ 10.2MPa, and the average compressive strength of 5 concrete hollow blocks is ≥ 12.4MPa, meeting the compressive standard for load-bearing blocks of strength grade MU10.0;

[0059] The average porosity of concrete hollow blocks is 52%, the thermal conductivity is less than or equal to 0.90W / m·K, and the loose density is about 1358kg / m 3 .

Embodiment 3

[0061] Weigh 342kg of P.O42.5R cement, 122kg of water, 595.4kg of medium-coarse river sand, 1270kg of gravel and / or pebbles; 29.6kg of continuously graded rubber particles, and 2.385kg of water reducing agent;

[0062] All the other steps are the same as in Example 1.

[0063] Test results: the minimum compressive strength of a single concrete hollow block is ≥ 9.8MPa, and the average compressive strength of 5 concrete hollow blocks is ≥ 11.8MPa, meeting the compressive standard for load-bearing blocks of strength grade MU10.0;

[0064] The average porosity of concrete hollow blocks is 53.3%, the thermal conductivity is less than or equal to 0.85W / m·K, and the loose density is about 1320kg / m 3 .

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Abstract

The invention discloses a concrete hollow building block with junked tire rubber granules and a preparation method thereof. The concrete hollow building block is prepared from the following raw materials in parts by weight: 302-375 parts of cement, 565.7-607.2 parts of medium river sand, 1180-1300 parts of gravel and / or rubble, 21.8-59.3 parts of rubber granule, 2.385 parts of water reducing agent and 106-134 parts of water. The preparation method comprises the following steps: immersing the rubber granules in a 20% KOH solution for 20 minutes, cleaning with clear water, and airing to the saturated-surface dry condition; adding the medium river sand, cement, water reducing agent and rubber granules into a stirrer, and stirring; and adding the gravel and / or rubble, adding water, stirring to obtain mixed concrete grout, forming the mixed concrete grout in a forming machine, curing, stripping, and naturally curing. The granularity of the rubber granules is 0.1-5mm, and the size distribution is reasonable. The hollow building block prepared by the method has favorable thermal insulation property, heat insulation property, sound insulation property, light weight and other comprehensive properties, and is suitable to be used as a building load-bearing building block for different load-bearing strength demands.

Description

technical field [0001] The invention relates to a concrete hollow block and a preparation method thereof, in particular to a concrete hollow block added with waste tire rubber particles and a preparation method thereof. Background technique [0002] With the rapid development of the automobile industry, the recycling of increasing waste tires has become a major topic of international concern. my country is the world's largest rubber consumer and the world's largest tire supplier. From 2002 to 2012, my country's rubber consumption ranked first in the world for 11 consecutive years. Hundreds of millions of rubber tires are discarded every year. Since they cannot be degraded naturally, the recycling and recycling of waste tires has long become a very urgent environmental protection issue. [0003] In recent years, my country has successively developed the application technology of rubber powder / granules in roads, railways, building materials and other aspects, and achieved cer...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B18/22C04B14/06
CPCY02W30/91
Inventor 潘腾飞李松辉单景松许妍张同双
Owner SHANDONG UNIV OF SCI & TECH
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