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Water-containing undisturbed shield slag non-fired building material and preparation method thereof

A technology for building materials and shield slag, used in chemical instruments and methods, cement production, sustainable waste treatment, etc. Effect

Active Publication Date: 2021-08-27
CHINA CONSTR FIFTH ENG DIV CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When the dregs are dehydrated and reused, after the dry dregs are added with liquid, due to the clay in the dregs, there will be agglomeration phenomenon, which is not conducive to stirring, so it is difficult to achieve a uniform state
In addition, the cost of the separate dehydration process is high, and the screening after dehydration is also very difficult
[0006] Since the original slag contains water and has many coarse particles, it is conceivable that the strength of the product is difficult to meet the strength requirements of basic building materials; secondly, it is difficult to mix the hydrated original slag with the active waste slag reach a state of uniformity

Method used

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  • Water-containing undisturbed shield slag non-fired building material and preparation method thereof
  • Water-containing undisturbed shield slag non-fired building material and preparation method thereof
  • Water-containing undisturbed shield slag non-fired building material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] The water-containing undisturbed shield slag unburned brick in this embodiment is prepared through the following steps:

[0089] Weigh 70 parts of water-containing original shield slag (by dry weight), 30 parts of blast furnace slag, 4 parts of sodium hydroxide solid, 7.5 parts of solid sodium silicate powder, and 15.4 parts of water; The type is moderately weathered conglomerate shield slag with a moisture content of 23%, which is taken from a certain section of Changsha Metro Line 3; the particle size of the blast furnace slag is above 200 mesh; The purity is 99%; the modulus of sodium silicate powder is 2.85, and the fineness is 100 mesh.

[0090] Mix 30 parts of blast furnace slag and 7.5 parts of solid sodium silicate powder in a mixer; take 70 parts of undisturbed weathered conglomerate shield slag, add 15.4 parts of water, and add blast furnace slag and solid sodium silicate powder that are well stirred The mixture is crushed and mixed with a rotary wheel mill, ...

Embodiment 2

[0093] The water-containing undisturbed shield slag unburned brick in this embodiment is prepared through the following steps:

[0094] Weigh 70 parts of water-containing original shield slag (by dry weight), 30 parts of blast furnace slag, 4.0 parts of sodium hydroxide solid, 6.0 parts of solid sodium silicate powder, and 14.5 parts of water; The type is strongly weathered slate shield slag with a moisture content of 36%, which is taken from a certain section of Changsha Metro Line 6; the particle size of the blast furnace slag is above 200 mesh; The purity is 99%; the modulus of sodium silicate powder is 2.85, and the fineness is 100 mesh.

[0095] Mix 30 parts of blast furnace slag and 6.0 parts of solid sodium silicate powder in a mixer; take 70 parts of undisturbed strongly weathered slate shield slag, add 14.5 parts of water, and add the well-stirred blast furnace slag and solid sodium silicate powder The mixture is crushed and mixed with a rotary wheel mill, and the co...

Embodiment 3

[0098] The water-containing undisturbed shield slag non-burning test piece in this embodiment is obtained through the following steps:

[0099] The water-containing undisturbed shield muck is taken from the moderately weathered conglomerate muck on the left line of a certain section of Changsha Metro Line 3, and its moisture content is 23%. Weigh 70 parts of water-containing original shield slag (by dry weight), 30 parts of fly ash, 4.09 parts of sodium hydroxide solid, 7.54 parts of solid sodium silicate powder, and 31.5 parts of water; the particle size of fly ash is 200 above mesh; sodium hydroxide is analytically pure in the form of industrial-grade solid flakes, with a purity of 99%; the modulus of sodium silicate powder is 2.85, and the fineness is 100 mesh.

[0100] Mix 30 parts of fly ash and 7.54 parts of solid sodium silicate powder in a mixer; take 70 parts of undisturbed weathered conglomerate shield muck, add 31.5 parts of water, and add the well-stirred fly ash a...

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Abstract

The invention relates to a fire-free building material containing water-containing original shield dregs and a preparation method thereof. According to the preparation method, the non-burning building material is composed of the following raw materials in parts by weight: 1-80 parts of water-containing original shield dregs, 1-30 parts of active waste residue, 0.1-5 parts of sodium hydroxide, and 0.1-10 parts of sodium silicate 1-20 parts of water, including the steps of: weighing active waste residue, sodium silicate, water-containing original shield slag and water, mixing and crushing until the content of particles above 4.75mm or 5mm in the water-containing original shield slag does not exceed 10% to obtain a mixture I; adding sodium hydroxide to the mixture I to obtain a mixture II; pouring the mixture II into a mold to obtain a water-containing undisturbed shield slag non-burning building material. The method saves the intermediate dehydration and screening processes and links, and greatly reduces the production cost. The present invention also includes the water-containing undisturbed shield slag non-fired building material prepared by the above method.

Description

technical field [0001] The invention relates to the technical field of building materials and solid waste treatment, in particular to a fire-free building material containing water-containing original shield-tunnel dregs and a preparation method thereof. Background technique [0002] Since the water-containing undisturbed shield dregs produced during shield excavation have high mud content and high water content, if not treated in time, it will cause potential danger. First of all, the existing waste disposal sites in cities are seriously insufficient, and many cities are facing the status quo of no land to pile up; secondly, there is no grass growing near the waste disposal sites, which has seriously affected or even destroyed the surrounding ecological environment; finally, with the accumulation of muck The number is gradually increasing, and its risk is also higher. Once an accident occurs, the consequences will be disastrous. [0003] Due to the high water content of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/08C04B28/02C04B40/00C04B18/16C04B111/20C04B111/27
CPCC04B28/08C04B28/021C04B40/0028C04B2111/27C04B2111/29C04B18/16C04B22/062C04B12/04Y02W30/91C04B2111/00767C04B28/006C04B28/26B09B3/21Y02P40/10C04B18/0418C04B18/08C04B18/142C04B40/0263C04B14/361C04B18/141
Inventor 习智琴李水生傅炎朝
Owner CHINA CONSTR FIFTH ENG DIV CORP LTD
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