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Ecological porous concrete and preparation method thereof

A technology for porous concrete and concrete, which is applied in ceramic products, other household appliances, applications, etc., can solve the problems of complex operation, difficult realization, and unfavorable promotion and application of alkali reduction technology, and achieves good alkali reduction effect, easy operation and long duration. long effect

Inactive Publication Date: 2017-03-08
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Most of the above-mentioned alkali reduction technologies are complicated to operate and difficult to realize, which is not conducive to popularization and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In this example, 1 m 3 Porous concrete as an example. Cement: silica fume: water: ferrous sulfate (FeSO 4 ·7H 2 O): gravel = 1:0.11:0.33:0.04:5.74 (mass ratio). Specific steps are as follows:

[0032] 1) Mix 270kg of P.O 42.5 ordinary Portland cement, 30kg of silica fume, 90kg of water, 12kg of ferrous sulfate, and 1550kg of 19-26.5mm gravel in the order of delivery, and stir with a mixer;

[0033] 2) Add the stirred mixed material into the prefabricated formwork, vibrate and perform curing, remove the formwork after 24 hours of curing, and continue curing for 28 days;

[0034] 3) Cover it with a film after it dries, and fill the film with CO with a volume concentration of 20% 2 (or place the test piece in a sealed container and fill it with CO 2 ) carbonized for 2 days;

[0035] 4) Finally, spray permanent condensate on the surface with a spray device (the amount of permanent condensate sprayed is based on the wetness of the specimen surface) and cover it with a...

Embodiment 2

[0038] In this example, 1 m 3 Porous concrete as an example. Cement: silica fume: water: ferrous sulfate (FeSO 4 ·7H 2 O): gravel = 1:0.11:0.33:0.04:6.35 (mass ratio). Specific steps are as follows:

[0039] 1) Mix 252kg of P.O 42.5 ordinary Portland cement, 28kg of silica fume, 84kg of water, 11.2kg of ferrous sulfate, and 1600 kg of 16-19mm gravel according to the order of delivery, and stir with a mixer;

[0040] 2) Add the stirred mixed material into the prefabricated formwork, vibrate and perform curing, remove the formwork after 24 hours of curing, and continue curing for 28 days;

[0041] 3) Fill the film with CO with a volume concentration of 20% after it is dried 2 (or place the test piece in a sealed container and fill it with CO 2 ) carbonized for 2 days;

[0042] 4) Finally, spray permanent condensate on the surface with a spray device (the amount of permanent condensate sprayed is based on the wetness of the specimen surface) and cover it with a film for 1 ...

Embodiment 3

[0045] In this example, 1 m 3 Porous concrete as an example. Cement: silica fume: water: ferrous sulfate (FeSO 4 ·7H 2O): crushed stone = 1:0.15:0.25:0.03:6.5 (mass ratio). Specific steps are as follows:

[0046] 1) Mix P.O 42.5 ordinary Portland cement, silica fume, water, ferrous sulfate, and 19-26.5mm gravel according to the order of delivery, and stir with a mixer;

[0047] 2) Add the stirred mixed material into the prefabricated formwork, vibrate and perform curing, remove the formwork after 24 hours of curing, and continue curing for 28 days;

[0048] 3) Fill the membrane with CO with a volume concentration of 15% after it dries. 2 (or place the test piece in a sealed container and fill it with CO 2 ) carbonized for 2 days;

[0049] 4) Finally, spray permanent condensate on the surface with a spray device (the amount of permanent condensate sprayed is based on the wetness of the specimen surface) and cover it with a film for 1 day. That is, the alkali reduction p...

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Abstract

The invention relates to an ecological porous concrete and a preparation method thereof. The preparation method comprises the following steps: adding silica fume and strong acid-weak base salt during batch mixing and stirring of concrete; carrying out rapid carbonization with CO2 or gas containing CO2 on a test block from molding and maintenance period to concrete age; and spraying Evercrete DPS onto the surface of the test block. According to the method, the principles of alkali absorption by the silica fume, alkali elimination by the strong acid-weak base salt, alkali immobilization by carbonization and alkali sealing by the Evercrete DPS are employed for alkali degradation, so the porous concrete having undergone the alkali degradation has good compressive strength and an alkalinity value (a pH value of 6 to 10) suitable for plant growth, can meet needs of most green and environment-friendly projects and is beneficial for maintaining ecological balance and realizing sustainable development.

Description

technical field [0001] The invention relates to an environment-friendly building material, in particular to an ecological porous concrete and a preparation method thereof. Background technique [0002] Ecological porous concrete is a new type of environmentally friendly building material with a special structure and performance between ordinary concrete and cultivated soil. It is made of cement, coarse aggregate, water, etc. according to a specific mix ratio. A type of concrete product that is continuously porous and suitable for the growth of green plants. At present, there are still many problems in the preparation technology of ecological porous concrete, which limits its wide application. The key technology for the successful preparation of ecological porous concrete is how to reduce the alkalinity in the pores of porous concrete to meet the requirements of vegetation growth. [0003] The biggest feature of ecological porous concrete is its vegetation. The green plants...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B38/00C04B40/02C04B111/40
CPCC04B28/04C04B40/0028C04B40/0231C04B2111/40C04B2201/50C04B18/146C04B14/02C04B22/149C04B38/0038
Inventor 尹健高婷张贵桑正辉胡雄伟李晟
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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