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Carbonation-based lightweight co 2 Foam cement-based material and its optimized preparation method and application

A foamed cement, carbonization technology, applied in chemical instruments and methods, applications, soil conditioning materials, etc., can solve the problems of high maintenance cost, difficult implementation, low strength, etc., and achieve easy control, obvious effect, and low consumables characteristics. Effect

Active Publication Date: 2021-12-07
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the above-mentioned problems of the prior art, the present invention is based on the principle of carbonization of cement slurry, combined with the existing foam cement slurry preparation technology, proposes a light CO based on carbonation 2 Optimize the preparation method of foam cement-based materials to solve the problems of high maintenance cost and difficult implementation
The material compensates for the low strength of lightweight mud

Method used

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  • Carbonation-based lightweight co <sub>2</sub> Foam cement-based material and its optimized preparation method and application
  • Carbonation-based lightweight co <sub>2</sub> Foam cement-based material and its optimized preparation method and application
  • Carbonation-based lightweight co <sub>2</sub> Foam cement-based material and its optimized preparation method and application

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Embodiment 1

[0053] The present invention is based on carbonization of light CO 2 Optimal preparation method of foamed cement-based materials. The preparation method is as figure 1 shown, including the following steps:

[0054] Step S1: Investigate the types of foaming agents and foam stabilizers used in the existing lightweight mud, and select 6 types of foaming agents and foam stabilizers that are more commonly used.

[0055] Step S2: Use figure 2 The carbon dioxide water-based foam foaming machine pre-tests the foaming agent and foam stabilizer in S1, and selects 3 kinds of foaming agents and 3 kinds of foam stabilizers according to the stability time and foaming height of the water-based foam to make carbon dioxide water-based Foam. like figure 2 As shown, the carbon dioxide water-based foam foaming machine includes a carbon dioxide gas cylinder 1, a primary pressure reducing valve 2, a secondary pressure reducing valve 9, an air storage tube 3, a liquid storage tube 5, a foamin...

Embodiment 2

[0077] The difference between this embodiment and embodiment 1 is only: the step S3 in embodiment 1: laboratory preparation grout is replaced by construction site preparation grout.

[0078] The steps for preparing grout at the construction site are as follows:

[0079] After the cement slurry is prepared, it is continuously stirred in the mixing tank. The foaming device absorbs the foaming liquid of appropriate concentration and fully foams it in the foaming tank. The mixing tank and the foaming tank are connected to the long conveying pipeline through a valve. Open the valve to mix the water-based foam and mud in the conveying pipeline, and pump delivered to the specified location.

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Abstract

The invention discloses a carbonization-based light CO 2 The invention relates to an optimized preparation method of a foam cement-based material, which belongs to the field of geotechnical engineering materials. The preparation process includes: S1: pre-select existing common cement-based foaming agents and foam stabilizers. S2: Preparation of carbon dioxide water-based foam. S3: Preparation of slurry, mixing CO2 water-based foam with cement slurry to make light CO2 2 Foamed cement-based materials, S4: Select different types and concentrations of foaming machines, types and concentrations of foam stabilizers to prepare slurry, conduct slurry performance tests and optimize them. S5: Parameter optimization of initial water-cement ratio and foam slurry ratio. S6: parameter optimization of air filling capacity (water pump speed). The invention can reduce the coagulation time of the slurry, increase the strength of the stone body, and has the advantages of light mud, low specific gravity and low stone body density. It solves the problems of high on-site construction cost of carbon dioxide curing mud in the rock and soil field and difficulties in realizing the technology.

Description

technical field [0001] The present invention relates to a carbonation-based light CO 2 The foamed cement-based material and its optimized preparation method and application belong to the field of geotechnical engineering and civil engineering materials. Background technique [0002] In the process of accelerating urbanization, the rapid development of the construction industry inevitably increases carbon dioxide emissions, which leads to a series of problems such as sea level rise and global warming. On the other hand, due to fuel combustion and clinker calcination in cement production, a large amount of carbon dioxide gas will be produced. According to the statistics of the Information Research Center of China Cement Association: every ton of quicklime calcined will produce 0.9 to 1.2 tons of carbon dioxide. Carbon dioxide emissions in the production cycle account for about 25% of the total emissions, and my country's total cement production last year exceeded 2.3 billion t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B38/10E02D3/12E01C3/04C09K17/48C09K17/10C04B111/40
CPCC04B28/00C04B38/103C04B38/106E02D3/12E01C3/04C09K17/48C09K17/10C04B2111/40C04B2201/20C04B2201/50C04B2111/00991C04B2111/00508C04B2111/0075C04B2111/00724C04B2111/00767C09K2103/00C04B24/10C04B24/20C04B22/10Y02P40/18B28C5/388C04B28/04C04B40/0231C04B2103/40C04B2103/48B01F2101/28B01F23/235B28C7/04C04B28/02C04B2103/42
Inventor 张箭丰土根张善伟
Owner HOHAI UNIV
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