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Ultrahigh-strength grouting material based on iron tailing sand and cement and preparation method of grouting material

A technology of iron tailings sand and grouting material, which is applied in the field of construction materials engineering, can solve the problems of lagging comprehensive utilization of tailings, etc., and achieve the effects of rough surface and strong cement bonding ability, cost reduction, and high particle strength

Inactive Publication Date: 2014-12-03
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, among all kinds of industrial solid waste in my country, the comprehensive utilization rate of coal gangue has reached 62.5%, and that of fly ash has reached 67%, while the comprehensive utilization rate of tailings is only 14%. Comprehensive utilization lags behind

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] An ultra-high-strength iron tailings sand cement-based grouting material, according to the weight percentage, its formula is as follows:

[0040] Ordinary 52.5 Portland cement: 36.8%

[0041] 42.5 grade rapid hardening sulfoaluminate cement: 2.5%

[0042] Iron tailings: 49.7%

[0043] Multi-mineral admixture: 8%

[0044] Compensating shrink expansion agent: 2.33%

[0045] Water reducer: 0.4%

[0046] Plastic expansion agent: 0.02%

[0047] Plasticizer: 0.25%

[0048] The fineness modulus of the iron tailings sand used in the mix ratio is 1.7 to 3.0. The particle size and gradation requirements of the iron tailings sand used in the mix ratio are as follows:

[0049] 4.75~2.36mm 14%

[0050] 2.36mm~1.18mm 35%

[0051] 1.18m ~0.3mm 31%

[0052] ≤0.3mm 20%

[0053] Among them, the fine powder content of iron tailings sand particles with a particle size below 0.075mm is ≤10%, the crushing value is ≤25%, the mud content is ≤1%, and the moisture content is ≤1.0%.

...

Embodiment 2

[0057] An ultra-high-strength iron tailings sand cement-based grouting material, according to the weight percentage, its formula is as follows:

[0058] Ordinary 52.5 Portland cement: 37.2%

[0059] 42.5 rapid hardening sulfoaluminate cement: 2.5%

[0060] Iron tailings: 49.5%

[0061] Multi-mineral admixture: 7.4%

[0062] Compensating shrink expansion agent: 2.5%

[0063] Water reducer: 0.5%

[0064] Plastic expansion agent: 0.02%

[0065] Plasticizer: 0.38%

[0066] The fineness modulus of the iron tailings sand used in the mix ratio is 1.7 to 3.0. The particle size and gradation requirements of the iron tailings sand used in the mix ratio are as follows:

[0067] 2.36mm~1.18mm 33%

[0068] 1.18m ~0.3mm 37%

[0069] 0.3~0.15mm 30%

[0070] Crushing value ≤ 25%, mud content ≤ 1%, moisture content ≤ 1.0%.

[0071] The multi-element mineral admixture is composed of silicon powder and S95 grade finely ground slag powder (25% silicon powder, 75% S95 grade finely gro...

Embodiment 3

[0074] The ultra-high-strength iron tailings sand cement-based grouting material, according to the weight percentage, its formula is as follows:

[0075] Ordinary 52.5 Portland cement: 32.7%

[0076] Iron tailings: 54%

[0077] Multi-mineral admixture: 10.2%

[0078] Compensating shrink expansion agent: 2.49%

[0079] Water reducing agent: 0.36%

[0080] Plastic expansion agent: 0.02%

[0081] Plasticizer: 0.23%

[0082] The fineness modulus of the iron tailings sand used in the mix ratio is 1.7 to 3.0. The particle size and gradation requirements of the iron tailings sand used in the mix ratio are as follows:

[0083] 2.36mm~1.18mm 27%

[0084] 1.18mm ~ 0.3mm 53%

[0085] ≤0.3mm 20%

[0086] Among them, the fine powder content of iron tailings sand particles with a particle size below 0.075mm is ≤10%, the crushing value is ≤25%, the mud content is ≤1%, and the moisture content is ≤1.0%.

[0087]The water reducer uses FOX talon101 polycarboxylate powder water reducer...

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Abstract

The invention relates to an ultrahigh-strength grouting material based on iron tailing sand and cement and a preparation method of the grouting material. The ultrahigh-strength grouting material is composed of the following components in proportion by weight: 30%-45% of cement, 45%-55% of iron tailing sand, 6%-15% of multielement mineral admixtures, 0.35%-1% of water reducing agent, 0.1%-1% of plastic retaining agent, 0.01%-0.1% of plastic expanding agent, and 2%-6% of shrinkage-compensating expanding agent. The preparation method comprises the steps of uniformly mixing all the components and then uniformly stirring the mixed components in water, wherein the ratio of the water to the materials is 0.09-0.11. The grouting material is good in flowability, is good in stability in a plastic stage, is free from shrinkage in the whole course from the plastic stage to a later hardening stage, and is ultrahigh in early strength, final strength and elasticity modulus, the 1d compressive strength of the material reaches up to 50MPa, the 28d compressive strength of the material can exceed 110MPa, and the 28d elasticity modulus of the material exceeds 45GPa, and therefore, the ultrahigh-strength grouting material is suitable for grouting of various important parts or areas with requirements on high strength and high modulus.

Description

technical field [0001] The invention belongs to the field of building material engineering, and in particular relates to an ultra-high-strength tailings sand cement-based grouting material and a preparation method thereof. Background technique [0002] The construction industry, metallurgical industry, electric power industry, and transportation industry are all tending to super-large-scale development, and engineering projects are becoming more and more complex. Among them, the grouting material plays an important role in the infrastructure construction of these industries, such as the support grouting of large bridges, the grouting of wind turbines, the bolt anchoring of super-large electromechanical equipment, the secondary grouting of equipment foundations, etc. Cement-based grouting material is a special mortar formulated with high-quality high-strength granular materials as fine aggregates, active materials such as cement as cementitious materials, and admixtures such ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06C04B28/04C04B18/12C04B111/70
CPCY02W30/91
Inventor 李北星宋小婧王威陈梦义
Owner WUHAN UNIV OF TECH