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Gypsum-based hydraulic hard grouting material and preparation method and application thereof

A technology of grouting materials and gypsum, which is applied in infrastructure engineering, soil protection, construction, etc., can solve the problems of high cost of polymer materials, inconformity with the concept of low-carbon environmental protection development, and obstacles to widespread application, so as to reduce the amount of cement And the effect of slag, improving mechanical properties and softening coefficient

Inactive Publication Date: 2019-04-16
GUIZHOU LANTU NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although cement-based materials are available in large quantities and low in price, they cannot penetrate into some tiny gaps because of their density, and the extensive use of cement will also increase the environmental load, which is not in line with the development concept of low-carbon and environmental protection; although synthetic chemical materials It has high fluidity and good diffusion effect in the foundation layer, but the polymer material itself has disadvantages such as high cost and certain toxicity, which hinder its wide application

Method used

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  • Gypsum-based hydraulic hard grouting material and preparation method and application thereof
  • Gypsum-based hydraulic hard grouting material and preparation method and application thereof
  • Gypsum-based hydraulic hard grouting material and preparation method and application thereof

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Effect test

Embodiment 1

[0026] Gypsum-based hydraulic grouting material, the weight percentage of each component is as follows:

[0027] Phosphogypsum dihydrate 30%;

[0028] S105 slag 15%;

[0029] PO525 cement 5%;

[0030] Sand 42.7%;

[0031] Water reducer 0.3%;

[0032] Coagulant component 5%;

[0033] Water retaining agent 2%.

[0034] The preparation steps of the gypsum-based hydraulic grouting material are as follows: Step 1: Weigh the required phosphogypsum dihydrate, slag, cement, sand, water reducing agent, coagulation-accelerating components and water-retaining components according to the weight percentage of each component described Mix well in a mixer to form a solid grouting material and pack it into bags; Step 2: Transport the solid grouting material obtained in step 1 to the construction site, take the solid material according to the actual demand, add water and stir evenly according to the water-solid ratio of 0.14 ; Step 3: Stir the mixture obtained in step 2 for 3-10 minutes ...

Embodiment 2

[0036] Gypsum-based hydraulic grouting material, the weight percentage of each component is as follows:

[0037] Phosphogypsum dihydrate 23.5%;

[0038] S105 slag 15%;

[0039] PO525 cement 12.5%;

[0040] Sand 44.8%;

[0041] Water reducer 0.2%;

[0042] Coagulant component 3%;

[0043] Water retaining agent 1%.

[0044] The preparation steps of the gypsum-based hydraulic grouting material are as follows: Step 1: Weigh the required phosphogypsum dihydrate, slag, cement, sand, water reducing agent, coagulation-accelerating components and water-retaining components according to the weight percentage of each component described Mix well in a mixer to form a solid grouting material and pack it into bags; Step 2: Transport the solid grouting material obtained in step 1 to the construction site, take the solid material according to the actual demand, add water and stir evenly according to the water-solid ratio of 0.14 ; Step 3: Stir the mixture obtained in step 2 for 3-10 min...

Embodiment 3

[0046] Gypsum-based hydraulic grouting material, the weight percentage of each component is as follows:

[0047] Phosphogypsum dihydrate 15%;

[0048] S115 slag 30%;

[0049] PO325 cement 5%;

[0050] Sand 45%;

[0051] Water reducing agent 0.3%;

[0052] Coagulant component 3.8%;

[0053] Water retaining agent 0.9%.

[0054]The preparation steps of the gypsum-based hydraulic grouting material are as follows: Step 1: Weigh the required phosphogypsum dihydrate, slag, cement, sand, water reducing agent, coagulation-accelerating components and water-retaining components according to the weight percentage of each component described Mix well in a mixer to form a solid grouting material and pack it into bags; Step 2: Transport the solid grouting material obtained in step 1 to the construction site, take the solid material according to the actual demand, add water and stir evenly according to the water-solid ratio of 0.14 ; Step 3: Stir the mixture obtained in step 2 for 3-10 ...

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Abstract

The invention discloses a gypsum-based hydraulic grouting material and a preparation method and application thereof. The grouting material is mainly composed of a gypsum component, a slag component, acement component, a sand component, a water reducing agent component, a coagulation promoting component and a water retention agent component. According to the grouting material, hydrated calcium sulphoaluminate, namely ettringite is generated under a reaction of gypsum and slag, so that the quantity of generated hydraulic minerals is large and stable; meanwhile, the slag and cement are subjectedto a secondary hydration reaction to generate C-S-H gel so that grouting slurry can stably exist in a base body to provide another strength source for the base body, an overall structure is formed with ettringite, the mechanical properties of the foundation base body are improved, and the softening coefficient of the foundation base body is increased; in addition, through the common functions ofthe three gel materials including the gypsum, the slag and the cement, hydration and mineral reaction products in the foundation base body are stabilized, and the situation is avoided that after the local foundation base body encounters water, a lot of strength loss is caused; besides, the coagulation promoting component is added, and the problem of coagulation retarding of the gypsum component issolved.

Description

technical field [0001] The invention relates to a gypsum-based hydraulic grouting material, a preparation method and application thereof. Background technique [0002] The grouting material is selected to achieve a certain engineering purpose, can exist in liquid form, and is convenient to use hydraulic pressure, air pressure or electrochemical principles to inject into the internal space of the corresponding medium, such as cracks, cracks, pores, etc., and has the ability to cement and solidify, so that the leakage of the medium The general term for a class of engineering materials whose channels are blocked and whose physical properties and mechanical properties are improved. Grouting materials are often called grouting materials. [0003] At present, the most commonly used method for foundation settlement is the grouting method or grouting method, that is, using hydraulic pressure, air pressure or electrochemical principles, the grout is evenly injected into the formation...

Claims

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Application Information

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IPC IPC(8): C04B28/14E02D3/12E01C3/04C04B111/70
CPCC04B28/14C04B2111/0075C04B2111/70C04B2201/50E01C3/04E02D3/12E02D2300/0045C04B18/141C04B7/00C04B14/06C04B2103/302C04B2103/12C04B2103/465
Inventor 杨再祥吴琼陈小平王涵李军付伯平
Owner GUIZHOU LANTU NEW MATERIALS
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