Green and environmentally-friendly concrete hollow block and production method thereof

A hollow block, green and environmentally friendly technology, applied in the direction of building components, sustainable waste treatment, solid waste management, etc., can solve the problems of polluting the environment, waste concrete occupying land, etc., to solve the pollution of the environment, solve the occupation of land, and expand the application range effect

Inactive Publication Date: 2017-03-22
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the present invention aims at the above-mentioned problems, and provides a green environmental protection concrete hollow block and its preparation method. The green environmental protection concrete hollow block can recycle the recycled coarse aggregate produced in the process of crushing waste concrete, and use Partially or complete

Method used

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  • Green and environmentally-friendly concrete hollow block and production method thereof
  • Green and environmentally-friendly concrete hollow block and production method thereof
  • Green and environmentally-friendly concrete hollow block and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030] The invention provides a method for preparing a green and environmentally friendly concrete hollow block, which is specifically implemented according to the following steps:

[0031] S1. Weighing: 14 parts of water, 31-35 parts of cement, 65-70 parts of fine aggregate, 120-128 parts of coarse aggregate, wherein the coarse aggregate is recycled coarse aggregate or recycled coarse aggregate and natural For a mixture of coarse aggregates, the ratio of recycled coarse aggregate to the weight of the entire coarse aggregate (substitution rate of recycled coarse aggregate) is 0 to 100%, wherein the replacement rate of recycled coarse aggregate is preferably 0%, 30%, 50%, 70%, 100%;

[0032] S2, mixing and stirring, put the weighed components into the mixer and stir evenly, then add water and water reducer and stir evenly to obtain the mixture;

[0033] S3, pressing and forming, pouring the obtained mixture into a mold, performing vibration pressing and forming, demoulding aft...

Example Embodiment

[0035] Example 1

[0036] MU7.5 green environmental protection concrete hollow block, the specific components (taking the replacement rate of recycled coarse aggregate as 50% as an example) are as follows: 14 parts of water, 31 parts of cement, 65 parts of fine aggregate, 64 parts of natural coarse aggregate , 64 parts of recycled coarse aggregate. After the preparation steps: mixing and stirring→press molding→curing for 28 days, the green and environmentally friendly concrete hollow blocks are made and sent for sample testing. T 8239-2014 and "Code for Building Structure Loads" GB50009-2012. The test results are shown in Table 1 below. It is worth explaining: through the test results, it is found that the strength grade of green concrete hollow blocks prepared with other recycled coarse aggregate replacement rates (0%, 30%, 70%, 100%) can reach MU7.5.

[0037] Table 1 Performance test results of green concrete hollow blocks (MU7.5)

[0038]

Example Embodiment

[0039] Example 2

[0040]The material selected in this embodiment is the same as that in Example 1, MU10 green environmental protection concrete hollow block, and the specific components (taking the replacement rate of recycled coarse aggregate as 70% as an example) are as follows: 14 parts of water, 35 parts of cement, 70 parts Fine aggregate, 36 parts of natural coarse aggregate, 84 parts of recycled coarse aggregate. After the preparation steps: mixing and stirring→press molding→curing for 28 days, the green concrete hollow block is made and sent for sample testing. The testing basis for strength grade MU10, bulk density and water absorption is "Ordinary Concrete Small Hollow Block" GB / T 8239 -2014 and "Code for Building Structure Loads" GB50009-2012. The test results are shown in Table 2 below. It is worth explaining: through the test results, it is found that the strength grade of the green concrete hollow blocks prepared with other recycled coarse aggregate replacement...

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Abstract

The invention discloses a green and environmentally-friendly concrete hollow block. The green and environmentally-friendly concrete hollow block comprises, by weight, 14 parts of water, 31-35 parts of cement, 65-70 parts of fine aggregates and 120-180 parts of coarse aggregates, wherein the coarse aggregates are regenerated coarse aggregates or a regenerated coarse aggregate and a natural coarse aggregate mixture, and the proportion of the regenerated coarse aggregates in the whole coarse aggregates is 0-100%. The invention also discloses a production method of the green and environmentally-friendly concrete hollow block. The method comprehensively takes the good mechanical performances of N-type concrete hollow blocks into consideration, and adopts the regenerated coarse aggregates to partially or completely substitute the natural coarse aggregates in the N-type concrete hollow blocks, so the application range of regenerated concrete is enlarged, and solving of the problems of land occupation and environment pollution of waste concrete is facilitated.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a green environment-friendly concrete hollow block and a preparation method thereof. Background technique [0002] In the process of urbanization, the construction waste generated by the demolition of old buildings is piled up arbitrarily, which will not only occupy a large amount of land, but also pollute the ecological environment. Most of the construction waste is waste concrete. If the waste concrete can be recycled after treatment, the above problems can be effectively solved. [0003] Recycled aggregates can be obtained by crushing waste concrete. In the process of preparing concrete, the concrete obtained by using recycled aggregates (mainly recycled coarse aggregates) to partially or completely replace natural aggregates is called recycled concrete. Various studies have shown that the mechanical properties of recycled concrete are not much different from ord...

Claims

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Application Information

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IPC IPC(8): E04C1/00C04B28/04C04B14/02C04B18/16
CPCC04B28/04C04B2201/50E04C1/00C04B14/02C04B18/167C04B2103/302Y02W30/91
Inventor 柯晓军苏益声安进孙海洋
Owner GUANGXI UNIV
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