Industrial waste residue multi-component composite shield tunnel wall post-grouting material and preparation method thereof

Abstract

The invention discloses an industrial waste residue multi-component composite shield tunnel wall post-grouting material and a preparation method thereof. The material comprises the following raw materials in parts by weight: 50 to 70 parts of fly ash, 10 to 30 parts of blast furnace slag micro-powder, 10 to 30 parts of inert steel slag micro-powder, 35 to 55 parts of an alkaline excitant, 150 to 200 parts of fine sand, 1 to 2 parts of a water reducing agent, 0 to 0.5 part of a retarder and 80 to 120 parts of water. The method comprises the following steps: adding sodium hydroxide into sodium water glass to prepare a modified sodium silicate solution; adding water into the modified sodium silicate solution to prepare an excitant solution, sealing the excitant solution with a polyethylene film, and cooling the excitant solution for later use; weighing fly ash, blast furnace slag micro-powder, inert steel slag micro-powder, fine sand, the water reducing agent and the retarder, and then putting the weighed materials into a stirrer to be uniformly stirred; and mixing the uniformly stirred powder with a pre-prepared excitant solution in proportion, and uniformly stirring. The method is simple in preparation process and low in cost, has the advantages of environmental protection, high efficiency and resource recycling, and has a wide application prospect.

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...

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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

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