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A kind of macroporous cement concrete capable of absorbing carbon dioxide and its preparation method

A technology for adsorbing carbon dioxide and cement concrete. It is used in cement production and other directions to achieve the effects of enhancing compressive strength, accelerating curing and storage, and reducing noise.

Inactive Publication Date: 2017-12-19
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide a large-porosity cement concrete capable of absorbing carbon dioxide and a preparation method thereof, so as to solve the problem of improving the cement concrete's ability to absorb carbon dioxide while improving the basic road performance of the cement concrete. The problem

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  • A kind of macroporous cement concrete capable of absorbing carbon dioxide and its preparation method

Examples

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Embodiment 1

[0029] This embodiment provides a kind of macroporous cement concrete capable of absorbing carbon dioxide, which is made of the following raw materials in parts by weight: cement: 100 parts, coarse aggregate: 385 parts, stone powder or gravel: 15.5 parts, geopolymerization Material binder: 5 parts, water reducer: 4.6 parts, water: 29.5 parts;

[0030] The cement is ordinary Portland cement with 42.5MPa;

[0031] Coarse aggregate is 6-22mm single-grain gradation.

[0032] Stone powder or gravel is a mixture of Fushan stone, pyroxene and Qinghe stone in a mass ratio of 2:2:1

[0033] Preparation:

[0034] Mix the stone powder or gravel, 10% formula design weight of water and sodium bicarbonate for 30s according to the proportion, so that the sodium bicarbonate can fully reflect the silica on the surface of fushan stone and / or pyroxene, and reduce the effect of silica on adsorption and solidification the effect of carbon dioxide;

[0035] Then add coarse aggregate, Qinghe sto...

Embodiment 2

[0041] This embodiment provides a kind of macroporous cement concrete capable of absorbing carbon dioxide, which is made of the following raw materials in parts by weight: cement: 100 parts, coarse aggregate: 314 parts, stone powder or gravel: 5 parts, geopolymerization Material binder: 4.6 parts, water reducer: 4.6 parts, water: 29.5 parts;

[0042] The cement is ordinary Portland cement with 42.5MPa;

[0043] Coarse aggregate is 6-22mm single-grain gradation.

[0044] Stone powder or gravel is a mixture of Fushan stone and Qinghe stone in a mass ratio of 2:1.

[0045] The preparation method of this embodiment is basically the same as that of Example 1.

[0046] The performance test method of this embodiment is the same as that of Example 1, and the performance test results are shown in Table 1.

Embodiment 3

[0048] This embodiment provides a kind of macroporous cement concrete capable of absorbing carbon dioxide, which is made of the following raw materials in parts by weight: cement: 100 parts, coarse aggregate: 368 parts, stone powder or gravel: 5 parts, geopolymerization Material binder: 4.6 parts, water reducer: 4.6 parts, water: 29.5 parts;

[0049] The cement is ordinary Portland cement with 42.5MPa;

[0050] Coarse aggregate is 6-22mm single-grain gradation.

[0051]Stone powder or gravel is a mixture of pyroxene and Qinghe stone in a mass ratio of 2:1.

[0052] The preparation method of this embodiment is basically the same as that of Example 1.

[0053] The performance test method of this embodiment is the same as that of Example 1, and the performance test results are shown in Table 1.

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Abstract

The invention provides macroporous cement concrete capable of adsorbing carbon oxide and a preparation method of the macroporous cement concrete. The macroporous cement concrete comprises cement and a coarse aggregate and further comprises stone powder or stone ballast, a geopolymer adhesive, a water reducer and water, wherein the stone powder or stone ballast is idocrase and / or pyroxene, or a mixture of idocrase and / or pyroxene and qingheiite. The preparation method comprises the following steps: stirring stone powder or stone ballast, water of 10% designed weight and sodium bicarbonate for 30s according to proportion; then adding coarse aggregate, qingheiite and water of 40% designed weight, uniformly mixing and stirring for 2 min; finally, adding cement, a geopolymer adhesive, a water reducer and the rest water of 50% designed weight, and stirring for about 2 min to obtain a cement concrete mixture. Carbon oxides and sulfides in air enter from pores of the macroporous cement concrete to react with idocrase and pyroxene so as to generate calcium salt, magnesium salt and other solid particles, and carbon oxides and sulfides are adsorbed and sealed up for safekeeping.

Description

technical field [0001] The invention belongs to the field of road engineering materials and relates to cement concrete, in particular to a large-pore cement concrete capable of absorbing carbon dioxide and a preparation method thereof. Background technique [0002] According to statistics, the burning of fossil energy produces 37 billion tons of carbon dioxide every year, and the carbon dioxide produced by the respiration of animals and plants and the decay of dead bodies will continue to increase this number, while the photosynthesis of plants on land can only fix 20 billion to 30 billion tons a year. carbon dioxide. Carbon dioxide emissions have far exceeded the absorption and conversion capacity of plant photosynthesis, destroying the natural carbon dioxide cycle balance. How to effectively reduce and control CO2 emissions has become one of the focuses of governments, business circles and academic circles all over the world. [0003] With the rapid development of the ec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00
CPCY02P40/10
Inventor 王朝辉范巧娟高志伟李彦伟王新岐
Owner CHANGAN UNIV
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