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Negative carbon emission modified raw soil-based building block and manufacturing method thereof

A production method and technology of permanent soil, which is applied in the field of civil engineering building materials, can solve the problems of high cement pollution, high energy consumption, and long block forming time, so as to avoid environmental and economic problems, have broad application prospects, and ensure safety effect

Pending Publication Date: 2021-07-20
扬州邗江中科南工建设工程与信息化研究中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It is not difficult to see from the research on raw soil modification at home and abroad that traditional lime, cement, wheat straw, etc. have obvious deficiencies as curing materials, the forming time of blocks is longer, the cement itself has high pollution, high energy consumption and high emission problems, and the moisture resistance and water resistance are not enough. Well, the advantages of modified raw soil blocks compared with cement concrete are not obvious, and at the same time, they do not have economic value and environmental benefits in terms of commercial promotion

Method used

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  • Negative carbon emission modified raw soil-based building block and manufacturing method thereof
  • Negative carbon emission modified raw soil-based building block and manufacturing method thereof
  • Negative carbon emission modified raw soil-based building block and manufacturing method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0021] A modified raw soil-based building block with negative carbon emissions, including the following raw materials: 210g of activated magnesium oxide, 210g of cement, 180g of fly ash, 1800g of raw soil,

[0022] Then add 480g, 600g and 720g of water respectively and mix to obtain three kinds of modified raw soil-based materials with different tax rates.

[0023] The ordinary Portland cement is Conch Group Conch brand 32.5 grade ordinary Portland cement; the active magnesia is selected from Japan Shen brand high-activity magnesia 150. The raw soil is taken from the expansive clay in the Hefei area, and with reference to the requirements in the "Soil Engineering Test Method Standard" (GB / T50123-1999), the mechanical performance index, particle composition and chemical composition analysis of the raw soil base material are tested respectively. To avoid the large particles in the soil material from affecting the accuracy of the test results, the natural raw soil was dried, crus...

Embodiment 2

[0029] A modified raw soil-based building block with negative carbon emission, comprising the following raw materials: 120g of activated magnesium oxide, 120g of cement, 60g of fly ash, 2100g of raw soil, and 600g of water.

[0030] A method for making a modified raw soil-based building block with negative carbon emissions. The above-mentioned modified raw soil-based materials are mixed and stirred evenly and injected into a mold with a length of 150 mm, a width of 150 mm, and a height of 150 mm for vibration, and a jack After pressing, the raw soil blocks were pressed at a pressing rate of 0.2kN / s during the pressing process and held at 5Mpa, 8Mpa, and 10Mpa for 10s to be pressed and formed. After molding, put it into a carbonization box for carbonization treatment. The parameters of the carbonization box are controlled at a temperature of 20°C, a humidity of 60%, and CO 2 The concentration is 30%, and the ventilation pressure is 100kpa. After carbonization for 21 days, the ...

Embodiment 3

[0032] A modified raw soil-based building block with negative carbon emission, comprising the following raw materials: 180 g of activated magnesium oxide, 180 g of cement, 90 g of fly ash, 1950 g of raw soil, and 600 g of water.

[0033] A method for making a modified raw soil-based building block with negative carbon emissions. The above-mentioned modified raw soil-based materials are mixed and stirred evenly and injected into a mold with a length of 150 mm, a width of 150 mm, and a height of 150 mm for vibration, and a jack After pressing, the raw soil blocks were pressed at a pressing rate of 0.2kN / s during the pressing process and held at 5Mpa, 8Mpa, and 10Mpa for 10s to be pressed and formed. After molding, put it into a carbonization box for carbonization treatment. The parameters of the carbonization box are controlled at a temperature of 20°C, a humidity of 60%, and CO 2 The concentration is 30%, and the ventilation pressure is 100kpa. After carbonization for 21 days,...

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Abstract

The invention discloses a negative carbon emission modified immature soil base building block and a manufacturing method thereof, and the negative carbon emission modified immature soil base building block is prepared from active magnesium oxide, cement, fly ash, immature soil and the like. The manufacturing method comprises the following steps: (1) selecting silty soil or clay, silty clay, expansive soil and the like, and passing through a screen with the aperture of 2mm; 2) preparing a mixture of magnesium oxide, cement, fly ash and immature soil according to a mass ratio of 7: 7: 6: 80, uniformly stirring, adding water, and stirring again to obtain a modified immature soil-based material; (3) putting the modified raw soil base material into a customized mold to be pressed into raw soil building blocks; and 4) putting the pressed building blocks into a carbonization box for carbonization treatment. The obtained modified raw soil building block has the characteristics of negative carbon emission, early strength, high performance, recyclability and the like. And the negative carbon emission modified immature soil base building block is environment-friendly, contributes to realizing carbon peak reaching and carbon neutralization, and can be widely applied to the fields of using local materials for earthwork, saving energy, protecting environment and the like.

Description

technical field [0001] The invention relates to the field of civil engineering building materials, in particular to a negative carbon emission modified raw soil foundation block and a manufacturing method thereof. Background technique [0002] With the acceleration of urbanization and the start of construction projects such as urban rail transit projects and old city renovation projects, the output and discharge of raw soil in urban construction have increased sharply. On the one hand, the accumulation of a large amount of raw soil will cause dust pollution, soil mass Landslides, waste of resources, soil erosion and other issues. On the other hand, transportation of raw soil will increase the construction funds and prolong the construction period. Raw soil has had a serious impact on urban construction and environmental protection. Many scholars at home and abroad have tried to make raw soil into blocks for reuse, which can not only avoid the environmental and economic pro...

Claims

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Application Information

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IPC IPC(8): C04B28/10C04B40/02
CPCC04B28/105C04B2201/50C04B2111/00017C04B7/02C04B14/10C04B18/08C04B40/0236
Inventor 张鹤年陈亮席培胜穆琳张伦豪
Owner 扬州邗江中科南工建设工程与信息化研究中心
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