Concrete paving brick capable of purifying air and method for manufacturing the same

A technology for purifying air and paving bricks, which is applied in the field of concrete and concrete paving bricks, and can solve the problems of low strength, porosity and high water absorption.

Active Publication Date: 2008-06-25
THE HONG KONG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application of recycled aggregates in structural concrete is limited to less than 20%, mainly due to the lower strength, porosity and higher water absorption of recycled aggregates compared with natural stone, which makes the fluidity of concrete more difficult to control

Method used

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  • Concrete paving brick capable of purifying air and method for manufacturing the same
  • Concrete paving brick capable of purifying air and method for manufacturing the same
  • Concrete paving brick capable of purifying air and method for manufacturing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Produce concrete paving bricks according to the ratio in Table 1. Compressive strength and NO x Methods for determining the rate of reduction are well known in the art.

[0026] From the ratio listed in Table 1 and the characteristics of the produced concrete paving bricks, it can be seen that due to the increase in the amount of waste glass aggregate, the strength of the paving bricks has decreased, but the strength of all concrete paving bricks still reaches above 49MPa. Fully meet the requirements of Hong Kong Building Code and British Standards. Under the same content of titanium dioxide, when waste glass aggregates are added, the brick has no effect on NO x The reduction rate increases, which is mainly due to the increase in the probability of titanium dioxide participating in the reaction due to the refraction of light by glass.

[0027] Table 1. Proportion and performance test results of concrete paving bricks

[0028]

[0029] Note: In Table 1, fly ash (%...

Embodiment 2

[0031] Proportionally produce concrete paving bricks according to Table 2. And measure the compressive strength and NO x reduction rate.

[0032] From the listed proportions of Table 2 and the characteristics of the manufactured concrete paving bricks, it can be seen that the compressive strength of the bricks increases due to the increase in the amount of cement, compared with Example 1, the content of titanium dioxide increases, and the NO x The reduction rate increases, but when the titanium dioxide exceeds 6%, the increase in the absorption rate is not obvious.

[0033] Table 2. Proportion and performance test results of concrete paving bricks

[0034]

Embodiment 3

[0036] Produce concrete paving bricks according to the ratio in Table 3. And measure the compressive strength and NO x reduction rate.

[0037] It can be seen that the paving bricks manufactured according to the ratio in the table can obtain good compressive strength and NO x Reduce rate.

[0038] Table 3. Proportion and performance test results of concrete paving bricks

[0039]

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Abstract

The invention provides a concrete paving brick capable of clarifying air produced by using building waste and recycled glass and the manufacturing method thereof. The paving brick comprises an absorption layer and a foundation layer, the absorption layer comprises cement, aggregate, titanium oxide and coal ash or kaolinite powder, the aggregate of the absorption layer comprises recycled aggregate, waste glass aggregate and sand or stones; the foundation layer comprises cement, aggregate and coal ash or kaolinite powder, the aggregate of the foundation layer comprises recycled aggregate, waste glass aggregate and sand or stones. The paving brick of the invention has good function of absorbing exhaust gas and good strength.

Description

technical field [0001] The invention belongs to the concrete category in the field of building materials, and relates to an air-purifying concrete paving brick manufactured by using construction waste and recycled glass, and a manufacturing method of the paving brick. Background technique [0002] In Hong Kong, a large amount of construction waste and waste glass bottles are generated every day, and the disposal of these construction waste and waste glass bottles has become a serious social and environmental problem. With the rapid economic growth and the improvement of people's living standards, in large and medium-sized cities in China, the management and treatment of construction waste and waste glass bottles is also becoming a major environmental problem, and seriously affects the country's sustainable development strategy . Therefore, it is becoming increasingly important to develop new technologies for recycling and utilizing construction waste and waste glass. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C5/06E01C15/00B28B15/00B28B3/00C04B28/00C04B22/06C04B18/08C04B14/08
CPCC04B2103/0019C04B2111/00017C04B2111/00612C04B28/02Y02W30/91C04B14/06C04B14/22C04B18/02C04B18/08C04B14/02C04B14/106C04B22/06
Inventor 潘智生寇世聪
Owner THE HONG KONG POLYTECHNIC UNIV
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