Multi-source solid waste-based grouting cementing material as well as preparation method and application thereof

A cementitious material and grouting technology, applied in the field of multi-source solid waste-based grouting cementitious materials and their preparation, can solve the problem of poor corrosion resistance, less than 1% utilization rate of red mud, and setting time of grouting cementitious materials. It can meet the needs of engineering applications, solve the problem of solid waste storage, and improve the comprehensive utilization rate.

Active Publication Date: 2020-09-22
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem of red mud in solid waste treatment is the most prominent. The large-scale stacking of red mud will cause continuous pollution to soil, water sources, air, etc. However, the utilization rate of red mud is less than 1%, and there is no effective industrialized treatment method.
However, in view of the special geological characteristics of coastal karst, such as strong seawater erosion, tidal water erosion, and alternating salt and fresh water cycles, the defects of cement slurry such as long setting time, low mechanical strength, and poor erosion resistance restrict the efficient reinforcement of coastal karst broken rock mass.
Although the multi-source solid waste-based grouting material has a certain mechanical strength, it generally has the problems of low red mud usage, little usage of other synergistic solid waste, long setting time and poor erosion resistance of grouting cementitious materials. , not suitable for grouting reinforcement treatment of coastal karst broken rock mass

Method used

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  • Multi-source solid waste-based grouting cementing material as well as preparation method and application thereof
  • Multi-source solid waste-based grouting cementing material as well as preparation method and application thereof
  • Multi-source solid waste-based grouting cementing material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1. Components and mass ratio: 60 parts of Bayer process red mud, 70 parts of other solid waste, 55 parts of activator, and 20 parts of admixture. Other solid wastes include the following raw materials in parts by weight: 20 parts of coal-fired slag, 20 parts of casting pig iron slag, 15 parts of converter steel slag, and 15 parts of desulfurized gypsum. Activator components and mass ratios are 34 parts of sodium hydroxide aqueous solution with a concentration of 12%, 22 parts of water glass, 18 parts of calcium chloride and 40 parts of sulphoaluminate cement clinker. The additive components and mass ratio are 8 parts of calcium formate, 22 parts of superfine silica fume, 8 parts of magnesium oxide expansion agent, and 6 parts of naphthalene-based water reducer.

[0047] 2. Preparation method: Use a ball mill to grind the red mud to a specific surface area of ​​500m 2 / Kg, grind the slag to a specific surface area of ​​450m 2 / Kg, grind the steel slag to a specific sur...

Embodiment 2

[0051] 1. Components and mass ratio: 80 parts of Bayer red mud, 70 parts of other solid waste, 60 parts of activator, 20 parts of admixture; other solid waste contains the following raw materials by weight; 20 parts of coal-fired slag, steelmaking pig iron 20 parts of slag, 15 parts of open hearth steel slag, 15 parts of desulfurized gypsum; 35 parts of activator components and mass ratio of 15% sodium hydroxide aqueous solution, 25 parts of water glass, 18 parts of calcium chloride, ordinary portland cement 45 servings. The components and mass ratio of the admixture are 8 parts of dimethyltriisopropanolamine, 30 parts of superfine magnesium oxide, 12 parts of iron filing expansion agent, and 6 parts of polycarboxylate superplasticizer.

[0052] 2. Preparation method: Use a ball mill to grind the red mud to a specific surface area of ​​450m 2 / Kg, grind the slag to a specific surface area of ​​400m 2 / Kg, grind the steel slag to a specific surface area of ​​350m 2 / Kg, grin...

Embodiment 3

[0056] 1. Components and mass ratio: 60 parts of sintering red mud, 60 parts of other solid waste, 40 parts of activator, and 10 parts of admixture. Other solid wastes include the following raw materials in parts by weight: 25 parts of coal-fired slag, 15 parts of special pig iron slag, 12 parts of electric furnace steel slag, and 8 parts of desulfurized gypsum. Activator components and mass ratios are 28 parts of 10% sodium hydroxide aqueous solution, 12 parts of water glass, 10 parts of calcium chloride and 30 parts of aluminate cement clinker. The additive components and mass ratio are 4 parts of triethanolamine, 15 parts of ultra-fine zeolite powder, 7 parts of calcium sulfoaluminate expansion agent, and 2 parts of naphthalene-based water reducer.

[0057] 2. Preparation method: Use a ball mill to grind the red mud to a specific surface area of ​​500m 2 / Kg, grind the slag to a specific surface area of ​​450m 2 / Kg, grind the steel slag to a specific surface area of ​​40...

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Abstract

The invention relates to a multi-source solid waste-based grouting cementing material as well as a preparation method and application thereof. The grouting cementing material is prepared from the following raw materials in parts by weight: 60 to 80 parts of red mud, 60 to 80 parts of other solid wastes, 40 to 60 parts of an excitant and 10 to 20 parts of an additive, wherein the other solid wastescomprise the following raw materials in parts by weight: 15-25 parts of furnace slag, 15-25 parts of mineral slag, 10-20 parts of steel slag and 8-20 parts of desulfurized gypsum. The preparation method is simple; the prepared grouting cementing material is short in setting time, high in early strength, high in stone body mechanical strength, excellent in erosion resistance and suitable for coastal karst broken rock mass reinforcement and treatment engineering, engineering safety construction in coastal areas can be guaranteed, the solid waste stockpiling pressure is relieved, the problem ofenvironmental pollution caused by red mud is solved, high added value is achieved, and comprehensive utilization of the red mud is promoted.

Description

technical field [0001] The invention belongs to the technical fields of solid waste comprehensive utilization, geotechnical engineering disaster control and building material preparation, and specifically relates to a multi-source solid waste-based grouting cementitious material and its preparation method and application. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] The hydrogeology in the coastal karst area is complex, and the formation rock mass has been subjected to tidal action, salt water cycle displacement, mechanical scour stress, and seawater seepage field for a long time, and the chemical and mineral components of the rock formation have been severely eroded an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/26C04B18/04C04B18/14C04B22/14C04B111/70
CPCC04B18/0409C04B18/067C04B18/141C04B18/142C04B22/145C04B28/26C04B2111/70C04B2201/50C04B22/062C04B22/124C04B7/02C04B7/32C04B2103/12C04B18/12C04B18/146C04B14/304C04B14/047C04B22/04C04B22/064C04B22/148C04B22/066C04B2103/302Y02W30/91
Inventor 李召峰张晨张健王衍升
Owner SHANDONG UNIV
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