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Shield mud cementing material and preparation method and application thereof

A cementitious material and mud technology, which is applied in the field of shield mud cementitious material and its preparation, can solve the problems of occupying land, transportation difficulties, and environmental pollution by waste shield mud, so as to save production costs, solve environmental pollution, and achieve important Environmental and economic benefits

Inactive Publication Date: 2019-09-06
SHENZHEN SHEN JIAYUAN ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, it is of great significance to find a method of resource utilization of waste shield mud to solve the problems of waste shield mud pollution, land occupation and transportation difficulties.

Method used

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  • Shield mud cementing material and preparation method and application thereof

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preparation example Construction

[0022] Embodiments of the present invention also provide a preparation method of shield mud cementitious material, comprising the steps of:

[0023] (1) Each raw material is prepared by weight;

[0024] (2) Mix the waste shield mud, quicklime and active powder uniformly to obtain a mixture A, react the mixture A to a water content ≤ 40%, then mix the mixture A and desulfurized gypsum uniformly to obtain a mixture B, and mix the mixture B at 600 React at ~700°C until the water content of the product is ≤1% to obtain the finished product.

[0025] In the present invention, since the reaction of quicklime, active powder and water and acid substances in the shield mud will release heat, the mixture A is reacted at normal temperature until the water content is ≤40%.

[0026] In some preferred implementations of the present invention, the mixture A is reacted to a water content of 15-35% to ensure that the mixture A and desulfurized gypsum can fully react, reduce energy consumption...

Embodiment 1

[0034] Embodiment 1 of the present invention provides a kind of shield mud cementitious material, and it comprises the component of following parts by weight: waste shield mud (water content 80%) 7 parts, quicklime 2 parts, construction waste micropowder 1 part and 0.5 parts of desulfurized gypsum.

[0035] The shield mud is prepared by the following method:

[0036] (1) Quicklime, construction waste micropowder and desulfurized gypsum are respectively ground and sieved with a 200-mesh sieve until the remaining 8.2% of quicklime 200-mesh sieve, 14.8% of construction waste micropowder 200-mesh sieve, desulfurized gypsum 200 The remaining 9.1% was sieved by the mesh sieve, and the sieved quicklime, construction waste micropowder and waste shield mud were stirred and mixed evenly to obtain mixture A;

[0037] (2) After the mixture A was reacted at normal temperature for 20 minutes, the water content of the mixture A was reduced to 30%, and then the mixture A was stirred and mixe...

Embodiment 2

[0039] Embodiment 2 of the present invention provides a kind of shield mud cementitious material, and it comprises the component of following parts by weight: waste shield mud (water content 85%) 6 parts, quicklime 1.5 parts, construction waste micropowder 0.8 part and 0.35 parts of desulfurized gypsum.

[0040] The shield mud is prepared by the following method:

[0041] (1) Grinding quicklime, construction waste micropowder and desulfurized gypsum respectively and sieving with a 200-mesh sieve until the remaining 10% of quicklime 200 mesh sieve, 15% of construction waste micropowder 200 mesh sieve, and 200 mesh desulfurization gypsum The remaining 10% was sieved through the mesh sieve, and the sieved quicklime, construction waste micropowder and waste shield mud were stirred and mixed evenly to obtain mixture A;

[0042] (2) After the mixture A was reacted at normal temperature for 25 minutes, the water content of the mixture A was reduced to 35%, and then the mixture A was...

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Abstract

The invention discloses a shield mud cementing material. The shield mud cementing material comprises, by weight, 5-15 parts of waste shield mud, 1-5 parts of quicklime, 0.5-2.5 parts of active powderand 0.2-0.8 part of desulfurization gypsum. Substances such as water, calcium, silicon and aluminum in the shield mud, the quicklime, the active powder and the desulfurization gypsum react at 600-700DEG C to generate the cementing material with activity. The cementing material can harden after reacting with water and can replace cement and fly ash, the problems that waste shield mud pollutes theenvironment, occupies land and is difficult to transport are solved, and the wasting of resources is also avoided. The invention further discloses a preparation method and application of the shield mud cementing material.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a shield mud cementitious material and its preparation method and application. Background technique [0002] With the continuous development of my country's railways, highways, water conservancy, and urban rail transit, the number of tunnel projects has gradually increased. As the main construction method of tunnel engineering, the shield tunneling method is more and more applied to the construction of various engineering fields in my country, especially the construction of super large diameter shield tunnels. When constructing high-depth and super-large-diameter shield tunnels, the mud-water balance shield method is generally used, that is, the soil on the excavation surface of the shield tunnel relies on the mud-water pressure to balance the water and soil pressure on the excavation surface to maintain the stability of the soil and play a role in maintaining the stab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/24C04B7/26C04B7/28C04B7/12C04B7/44C04B28/04
CPCC04B7/12C04B7/24C04B7/246C04B7/26C04B7/28C04B7/44C04B28/04C04B14/068C04B14/02C04B24/226Y02P40/10
Inventor 王文圣黄克伟
Owner SHENZHEN SHEN JIAYUAN ENVIRONMENTAL TECH CO LTD
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