Controllable low-strength material prepared from steel slag desulfurization byproducts and construction waste soil and preparation method thereof

A technology for desulfurization by-products and construction slag, applied in cement production, solid waste management, climate sustainability, etc., can solve the problem of low resource utilization of steel slag desulfurization by-products

Pending Publication Date: 2021-09-14
NINGBO UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a controllable low-strength material using steel slag desulfurization by-products and cons

Method used

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Examples

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preparation example Construction

[0035] The present invention also provides a method for preparing a controllable low-strength material using steel slag desulfurization by-products and construction dregs, including the following steps:

[0036] (1) Dry the by-products of steel slag desulfurization and grind them into 400m 2 / kg of fine powder, mixed with dry cement, fly ash, slag, alkali activator, dispersant, thickener, and stirred in a mixer for 3 to 5 minutes to obtain a dry mix;

[0037] (2) Mix construction dregs and water, and stir in a mixer for 10 to 15 minutes to obtain a mud slurry;

[0038] (3) Mix the dry mix and the slurry, and stir in a mixer for 10-30 minutes to obtain a controllable low-strength material.

[0039] Preferably, the amount of water used in step (2) is added according to the water-solid mass ratio of 0.3-0.5, more preferably 0.3. Among them, the solid in the water-solid mass ratio refers to the total mass of the dry mixture and the construction dregs after the water content is r...

Embodiment 1

[0041] This embodiment provides a controllable low-strength material using steel slag desulfurization by-products and construction slag, which is prepared from the following raw materials in parts by mass: 65 parts of construction slag, 20 parts of steel slag desulfurization by-products, and 5 parts of cement , 10 parts of fly ash, 8 parts of slag, 5 parts of sodium hydroxide, 0.5 parts of sodium silicate, and 0.05 parts of PAM.

[0042] The preparation method comprises the following steps:

[0043] (1) Dry the by-products of steel slag desulfurization and grind them into 400m 2 / kg of fine powder, mixed with dry cement, fly ash, slag, sodium hydroxide, sodium silicate, PAM, and stirred in a mixer for 3 minutes to obtain a dry mix;

[0044] (2) Mix construction dregs (moisture content 30%) with water, control the water-solid mass ratio to 0.3, and stir in a mixer for 10 minutes to obtain mud slurry;

[0045] (3) Mix the dry mix and the slurry, and stir in a mixer for 30 minu...

Embodiment 2

[0048] This embodiment provides a controllable low-strength material using steel slag desulfurization by-products and construction slag, which is prepared from the following raw materials in parts by mass: 50 parts of construction slag, 15 parts of steel slag desulfurization by-products, and 2 parts of cement , 6 parts of fly ash, 5 parts of slag, 2 parts of quicklime, 0.2 part of sodium silicate, and 0.06 part of PAM.

[0049] The preparation method comprises the following steps:

[0050] (1) Dry the by-products of steel slag desulfurization and grind them into 400m 2 / kg of fine powder, mixed with dry cement, fly ash, slag, quicklime, sodium silicate, PAM, and stirred in a mixer for 5 minutes to obtain a dry mix;

[0051] (2) Mix construction dregs (water content 40%) with water, control the water-solid mass ratio to 0.4, and stir in a mixer for 10 minutes to obtain mud slurry;

[0052] (3) Mix the dry mix and the slurry, and stir in a mixer for 30 minutes to obtain a cont...

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Abstract

The invention belongs to the technical field of preparation of controllable low-strength materials, and discloses a controllable low-strength material prepared from steel slag desulfurization byproducts and construction waste soil and a preparation method thereof. The material is prepared from the following raw materials in parts by mass: 40-65 parts of building residue soil, 8-20 parts of a steel slag desulfurization byproduct, 1-5 parts of cement, 6-13 parts of fly ash, 5-10 parts of slag, 0.5-5 parts of an alkali activator, 0.2-2 parts of a dispersing agent and 0.05-1 part of a thickening agent. According to the controllable low-strength material, the construction waste is used for replacing part of cement to serve as a cementing material, resource utilization of the construction waste is achieved, cement resources are saved, harm of construction engineering waste to the environment is reduced, the prepared controllable low-strength material is used for backfilling soil, cyclic utilization of the construction resources is achieved, meanwhile, the problem that a large number of steel slag desulfurization byproducts are stacked to pollute the environment is solved, and good economic benefits and social values are achieved.

Description

technical field [0001] The invention relates to the technical field of preparation of controllable low-strength materials, in particular to a controllable low-strength material utilizing steel slag desulfurization by-products and construction dregs and a preparation method thereof. Background technique [0002] Controlled low strength material (CLSM for short) is a new type of backfill material with high fluidity, which can be self-filled to form a self-compacting structure under the action of its own weight without or with a little vibration. Compared with traditional backfill or other loose materials, CLSM’s good fluidity and self-tightness prevent the problem of insufficient bearing capacity, and its self-leveling properties are especially suitable for special structures with high density, narrowness, and inaccessibility; It can save vibration, rolling, compaction and other processes during construction, reduce construction cost and shorten construction period. According...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B22/14C04B22/00C04B7/24
CPCC04B28/00C04B7/246C04B22/143C04B22/0006C04B2111/00017C04B2201/50C04B18/08C04B18/141C04B22/062C04B2103/408C04B2103/44C04B22/064Y02P40/10Y02W30/91
Inventor 温小栋冯蕾张胜权殷刚吉陈诺
Owner NINGBO UNIVERSITY OF TECHNOLOGY
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