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A kind of post-grouting material of industrial waste multi-component composite shield tunnel wall and its preparation method

A multi-component composite and shield tunneling technology, which is applied in the field of engineering materials, can solve the problems of inert steel slag powder that cannot be solidified and hardened, high flow loss over time, and fast coagulation time, so as to achieve continuous growth in late strength, high early strength, and low cost. cheap effect

Active Publication Date: 2022-03-08
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are always unsatisfactory problems when industrial waste residue is used alone. For example, the alkali-activated material prepared by using fly ash alone as the gelling powder at room temperature has the disadvantages of long setting time and low strength. Condensation and hardening under autoclaved conditions; when blast furnace slag is used alone as a cementitious powder, the fast setting time and high flow loss over time lead to poor work performance; when the inert steel slag powder is used alone as a cementitious powder, it cannot be used in the effective coagulation time. internal condensation hardening

Method used

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  • A kind of post-grouting material of industrial waste multi-component composite shield tunnel wall and its preparation method

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Embodiment 1

[0021] A method for preparing grouting material behind the wall of an industrial waste multi-component composite shield tunnel, comprising the following steps:

[0022] (1) adding sodium hydroxide in sodium silicate and adjusting to modulus is the modified sodium silicate solution of 1.4, and the mass ratio of sodium silicate solution and water press is 0.35;

[0023] (2) Add 80 parts of water to the modified sodium silicate solution, configure the alkaline activator solution, seal it with a polyethylene film, and cool it for later use;

[0024] (3) Take by weighing 50 parts of I grade C class fly ash, 10 parts of S95 grade blast furnace slag micropowder, 10 parts of inert steel slag micropowder, 150 parts of fine sand (river sand with mud content<1%) that modulus is 1.5, 1 part of FDN-C nano-based superplasticizer, 0.01 part of retarder sodium gluconate, then put it into a mixer and stir evenly, and stir at 140r / min for 3min;

[0025] (4) Mix the uniformly stirred powder wit...

Embodiment 2

[0027] A method for preparing grouting material behind the wall of an industrial waste multi-component composite shield tunnel, comprising the following steps:

[0028] (1) adding sodium hydroxide in sodium silicate and adjusting to modulus is the modified sodium silicate solution of 1.8, and the mass ratio of sodium silicate solution and water press is 0.5;

[0029] (2) Add 120 parts of water to the modified sodium silicate solution, configure the alkaline activator solution, seal it with a polyethylene film, and cool it for later use;

[0030] (3) Take by weighing 70 parts of class II class C fly ash, 30 parts of S95 grade blast furnace slag micropowder, 30 parts of inert steel slag micropowder, 200 parts of fine sand with a modulus of 2.0 (river sand with mud content<1%), 2 parts of FDN-C nano-based superplasticizer, 0.5 part of retarder sodium gluconate, and then put it into a mixer and stir evenly, stirring at 140r / min for 3min;

[0031] (4) Mix the uniformly stirred pow...

Embodiment 3

[0033] A method for preparing grouting material behind the wall of an industrial waste multi-component composite shield tunnel, comprising the following steps:

[0034] (1) adding sodium hydroxide in sodium silicate and adjusting to modulus is the modified sodium silicate solution of 1.6, and the mass ratio of sodium silicate solution and water press is 0.43;

[0035] (2) Add 100 parts of water to the modified sodium silicate solution to configure the alkaline activator solution, seal it with a polyethylene film, and cool it for later use;

[0036] (3) Take by weighing 60 parts of I grade C class fly ash, 20 parts of S95 grade blast furnace slag micropowder, 20 parts of inert steel slag micropowder, 175 parts of fine sand (river sand with mud content<1%) that modulus is 1.7, 1.5 parts of FDN-C nano-based water reducer, 0.3 parts of retarder sodium gluconate, and then put it into a mixer and stir evenly, stirring at 140r / min for 3min;

[0037] (4) Mix the uniformly stirred pow...

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Abstract

The invention discloses an industrial waste slag multi-component composite shield tunnel wall grouting material and a preparation method thereof. The material contains the following raw materials in parts by weight: 50-70 parts of fly ash, 10-30 parts of blast furnace slag fine powder , 10-30 parts of inert steel slag powder, 35-55 parts of alkaline activator, 150-200 parts of fine sand, 1-2 parts of water reducing agent, 0-0.5 parts of retarder, 80-120 parts of water. The method comprises the following steps: adding sodium hydroxide into sodium water glass to configure a modified sodium silicate solution; adding water to the modified sodium silicate solution to configure an activator solution, sealing it with a polyethylene film, and cooling and set aside; weigh fly ash, blast furnace slag fine powder, inert steel slag fine powder, fine sand, water reducer, retarder, and then put them into a mixer and stir evenly; The activator solution was mixed in proportion and stirred evenly. The preparation method of the invention is simple, low in cost, has the advantages of environmental protection, high efficiency and resource recycling, and has broad application prospects.

Description

technical field [0001] The invention belongs to the field of engineering materials, in particular to an industrial waste slag multi-component composite shield tunnel wall post-grouting material and a preparation method thereof. Background technique [0002] With the rapid development of my country's modern industrialization process, the discharge of industrial waste residues is increasing year by year. Among them, the discharge of fly ash, blast furnace slag and steel slag is high and the utilization rate is low. If these industrial wastes cannot be disposed of and utilized in a timely and effective manner to turn them into treasures, serious resource waste and environmental pollution problems will surely be brought about. Alkali-activated industrial waste slag composite material technology is to use alkaline activator to stimulate the active components in the waste slag system to make it show strong gelling property, which can not only make full use of the residual value o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/26C04B111/70
CPCC04B28/26C04B2111/70C04B2111/00724C04B2201/50C04B22/062C04B18/08C04B18/142C04B14/06C04B2103/302C04B2103/22
Inventor 朱志铎宋世攻张军姚凯胡乐乐宋维龙彭宇一李纤万瑜
Owner SOUTHEAST UNIV
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