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Pavement grouting material and production method thereof

A technology for pressing grout and roads, which is applied in the field of pressing grout, which can solve the problems of poor fluidity, slow construction speed, easy segregation and stratification, etc., and achieve the goals of improving safety and durability, easy construction and operation, and easy quality control Effect

Inactive Publication Date: 2018-03-27
广西云燕特种水泥建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cement, various admixtures and water are used to prepare grout on site, and there are usually problems such as poor compatibility of various admixtures, poor adaptability of cement and water reducing agent, etc., resulting in the following serious problems in tunnel grouting: (1) The quality of the slurry is stable Poor fluidity, poor fluidity, fast flow loss, good volume stability; (2) The freshly mixed slurry has large bleeding, easy to segregate and stratify, there are many microfoam in the slurry, poor fluidity, unsuitable coagulation time, and the slurry When grouting, it is often not smooth, easy to block the pipe, slow in construction speed, and difficult to form a full state in the channel; (3) After hardening, the slurry is not d

Method used

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  • Pavement grouting material and production method thereof
  • Pavement grouting material and production method thereof
  • Pavement grouting material and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A kind of press grout for highway, this press grout comprises cementitious material and grouting material;

[0040] The gelling material comprises the following raw materials in parts by weight:

[0041] Portland cement: 70; sulfoaluminate clinker powder: 5; active mineral admixture: 5; composite activator: 0.4;

[0042] The grout contains the following raw materials in parts by weight:

[0043] Cementitious material: 92; expansion agent: 8; polycarboxylate superplasticizer: 0.1; anti-sedimentation agent: 0.04; rust inhibitor: 0.1; defoamer: 0.04.

[0044] The Portland cement is Portland cement with a grade above 42.5.

[0045] The sulfoaluminate clinker powder is made of calcium carbonate, hematite, kaolinite and gypsum in a weight ratio of 3:2:3:1, and after being calcined at 1300-1350°C, it is added with a weight percentage of 3 - Clinker made by co-grinding 5% marble and 3-5% granite.

[0046] The active mineral admixture includes the following raw materials in ...

Embodiment 2

[0057] A kind of press grout for highway, this press grout comprises cementitious material and grouting material;

[0058] The gelling material comprises the following raw materials in parts by weight:

[0059] Portland cement: 80; sulfoaluminate clinker powder: 8; active mineral admixture: 15; composite activator: 0.5;

[0060] The grout contains the following raw materials in parts by weight:

[0061] Cementitious material: 94; expansion agent: 6; polycarboxylate superplasticizer: 0.2; anti-sedimentation agent: 0.04; rust inhibitor: 0.2; defoamer: 0.1.

[0062] The Portland cement is Portland cement with a grade above 42.5.

[0063] The sulfoaluminate clinker powder is made of calcium carbonate, hematite, kaolinite and gypsum in a weight ratio of 3:2:3:1, and after being calcined at 1300-1350°C, it is added with a weight percentage of 3 - Clinker made by co-grinding 5% marble and 3-5% granite.

[0064] The active mineral admixture includes the following raw materials in pa...

Embodiment 3

[0074] A kind of press grout for highway, this press grout comprises cementitious material and grouting material;

[0075] The gelling material comprises the following raw materials in parts by weight:

[0076] Portland cement: 90; sulphoaluminate clinker powder: 10; active mineral admixture: 25; composite activator: 0.7;

[0077] The grout contains the following raw materials in parts by weight:

[0078] Cementitious material: 96; expansion agent: 8; polycarboxylate superplasticizer: 0.4; anti-sedimentation agent: 0.08; rust inhibitor: 0.5; defoamer: 0.2.

[0079] The Portland cement is Portland cement with a grade above 42.5.

[0080] The sulfoaluminate clinker powder is made of calcium carbonate, hematite, kaolinite and gypsum in a weight ratio of 3:2:3:1, and after being calcined at 1300-1350°C, it is added with a weight percentage of 3 - Clinker made by co-grinding 5% marble and 3-5% granite.

[0081] The active mineral admixture includes the following raw materials i...

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Abstract

The invention discloses a pavement grouting material which comprises a cementing material and a grouting material, wherein the cementing material comprises the following raw materials in parts by weight: 70-90 parts of Portland cement, 5-10 parts of sulfoaluminate chamotte powder, 5-15 parts of activated mineral admixtures and 0.4-0.7 part of a composite activator; the grouting material comprisesthe following raw materials in parts by weight: 92-96 parts of a cementing material, 4-8 parts of an expansion agent, 0.1-0.5 part of a polycarboxylate water reduction agent, 0.01-0.08 part of an anti-settling agent, 0.1-0.5 part of an anti-rusting agent and 0.04-0.2 part of a defoaming agent. The pavement grouting material is applicable to grouting materials and production methods thereof in post-tensioned prestressing duct grouting of industrial and civil buildings, pavements, railways and water-power engineering prefabricated beams; and under a low water-binder ratio, the slurry of the product is high in flowability, the initial flowing degree of the sludge discharged from a machine is 10-17 seconds, and the flowing degree within 60 minutes is still within 25 seconds.

Description

technical field [0001] The invention relates to the technical field of slurry, in particular to a press slurry suitable for pouring into post-tensioned prestressed channels of prefabricated beams in industrial and civil buildings, highways, railways, and hydropower projects and a production method thereof. Background technique [0002] In China, the traditional grout used in early prestressed tunnel grouting is generally pure cement slurry, which is prepared on site with cement, water, water reducing agent, and expansion agent during construction. The grouting material prepared on site must meet the following requirements: the water-cement ratio is 0.40-0.45, mixed with an appropriate amount of water-reducing agent, the water-cement ratio can be reduced to a minimum of 0.35; the maximum bleeding rate of the grout should not exceed 3%, and the bleeding should be within Re-absorbed by the mortar within 24 hours; the viscosity of the grout should be controlled within 14-18s; th...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B40/0042C04B18/142C04B22/143C04B24/122C04B22/14C04B22/062C04B24/20C04B22/08C04B2103/0068C04B22/148C04B24/24C04B24/383C04B22/085C04B22/16C04B22/06C04B24/16C04B22/00C04B24/32C04B24/42
Inventor 黄芳农承战许建兴
Owner 广西云燕特种水泥建材有限公司