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A kind of red mud-based foam light soil and preparation method thereof

A technology of foam lightweight soil and red mud, which is applied in the field of building materials, can solve the problem of difficulty in realizing large-scale utilization of red mud, and achieve the effects of improving strength and reducing pollution.

Active Publication Date: 2020-08-21
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to realize a large amount of red mud utilization. Therefore, there is an urgent need for a practical and feasible method that can consume a large amount of red mud.

Method used

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  • A kind of red mud-based foam light soil and preparation method thereof
  • A kind of red mud-based foam light soil and preparation method thereof
  • A kind of red mud-based foam light soil and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A preparation method of red mud-based foam light soil, comprising the following steps:

[0050] 1) Weighing raw materials: including 217 parts of red mud, 11 parts of desulfurized gypsum, 309 parts of cement, 273 parts of water, and 21 parts of foam.

[0051] 2) Stir the weighed water, desulfurized gypsum and red mud at a speed of 1400 rpm for 5 minutes, then add cement and stir at a speed of 1400 rpm for 5 minutes.

[0052] 3) Reduce the rotational speed to 700rpm, add foam and stir for 2 minutes, and adjust the density of the obtained slurry to 800kg / m 3 , the red mud-based foam light soil can be obtained.

[0053] 4) The red mud-based foam lightweight soil can be poured into shape to obtain the red mud-based foam lightweight soil specimen.

[0054] like figure 1 and Figure 4 As shown, the red mud-based foam lightweight soil specimens prepared in this example were tested for compressive strength and elastic modulus, and the 28d compressive strength was 1.2MPa, an...

Embodiment 2

[0056] A preparation method of red mud-based foam light soil, comprising the following steps:

[0057] 1) Weighing raw materials: including 271 parts of red mud, 14 parts of desulfurized gypsum, 271 parts of cement, 270 parts of water, and 22 parts of foam.

[0058] 2) Stir the weighed water, desulfurized gypsum and red mud at a speed of 1400 rpm for 7 minutes, then add cement and stir at a speed of 1400 rpm for 7 minutes.

[0059] 3) Reduce the rotation speed to 700rpm, add foam and stir for 2.5min, and adjust the density of the obtained slurry to 800kg / m 3 , the red mud-based foam light soil can be obtained.

[0060] 4) The red mud-based foam lightweight soil can be poured into shape to obtain the red mud-based foam lightweight soil specimen.

[0061] like figure 2 and Figure 5 As shown, the red mud-based foam lightweight soil specimens prepared in this example were tested for compressive strength and elastic modulus, and the 28-day compressive strength was 0.94MPa, an...

Embodiment 3

[0063] A preparation method of red mud-based foam light soil, comprising the following steps:

[0064] 1) Weighing raw materials: including 325 parts of red mud, 16 parts of desulfurized gypsum, 207 parts of cement, 267 parts of water, and 23 parts of foam.

[0065] 2) Stir the weighed water, desulfurized gypsum and red mud at a speed of 1400 rpm for 10 minutes, then add cement and stir at a speed of 1400 rpm for 10 minutes.

[0066] 3) Reduce the rotational speed to 700rpm, add foam and stir for 3 minutes, and adjust the density of the obtained slurry to 800kg / m 3 , the red mud-based foam light soil can be obtained.

[0067] 4) The red mud-based foam lightweight soil can be poured into shape to obtain the red mud-based foam lightweight soil specimen.

[0068] like image 3 and 6 As shown, the red mud-based foam lightweight soil specimens prepared in this example were tested for compressive strength and elastic modulus, and the 28-day compressive strength was 0.81 MPa, and...

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Abstract

The invention relates to red mud-based foam light soil and a preparation method thereof. The red mud-based foam light soil is prepared from the following components in parts by weight: 268 to 401 parts of red mud, 13 to 20 parts of desulphurization gypsum, 382 to 256 parts of cement, 329 to 337 parts of water and 32 to 33 parts of foam. The prepared red mud-based foam light soil has a flow value of 160 to 200mm, wet density of 780 to 820kg / m<3>, 28d unconfined compressive strength of 0.81 to 1.20MPa, and an 28d rebound modulus of 280 to 377MPa. The red mud is used instead of a part of cementing materials, so that the preparation cost is lowered greatly compared with foam light soil prepared from cement, fly ash or silt. Meanwhile, industrial waste is recycled, so that the concept of greendevelopment is satisfied, and the problem of lack in road engineering materials is solved. Meanwhile, the red mud-based foam light soil is simple in preparation method, meets the roadbed strength requirement, and is suitable for road subgrade filling and roadbed widening.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a red mud-based foam lightweight soil and a preparation method thereof. Background technique [0002] Foam light soil is a lightweight engineering material with a large number of closed pores obtained by adding the foam group obtained by foaming with a foaming agent into the cementitious material and curing it. It has the advantages of light weight, good integrity, adjustable strength and density, high fluidity, good heat insulation, sound insulation, waterproof performance, and self-support after solidification. The difference in settlement of the old subgrade saves road land and shortens the construction period. When it is used for filling soil at the back of the abutment, it can greatly alleviate the problem of vehicle jumping at the bridge head, and at the same time reduce the horizontal force on the abutment structure. Most of the existing foam light soils use ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/10C04B28/18
CPCC04B28/186C04B38/106C04B2201/20C04B2201/50C04B38/0067C04B7/02C04B18/0409C04B22/145C04B22/002C04B2103/42
Inventor 蒋红光侯智坚姚占勇王立旗刘舜李慧王旭张恩博张吉哲梁明
Owner SHANDONG UNIV
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