High-strength grout containing superfines and preparing method

A technology of ultra-fine powder and grouting material, which is applied in the field of grouting materials, can solve the problems affecting construction quality, thermal stability and poor durability of grouting materials, and achieve the effects of low cost, convenient transportation and wide application

Active Publication Date: 2011-06-08
北京新奥混凝土集团有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-strength grouting material containing ultrafine powder, to solve the technical problems of poor thermal stability and durability of traditional grouting materials and affecting construction quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A high-strength grout containing superfine powder, the composition and weight percentage of the grout are:

[0028] Sulphoaluminate cement 17%,

[0029] 8% mixture of limestone powder and finely ground fly ash,

[0030] Ground slag 8%,

[0031] Lignosulfonate-based water reducer 0.15%,

[0032] Hydroxyethyl Cellulose 0.02%,

[0033] Construction sand 54%,

[0034] Mix water 13%.

[0035] The performance of this superfine powder high-strength grouting material is as follows:

[0036] Compressive strength R 6h = 12.3MPa, R 1d =33.2MPa,R 7d =50.4MPa

[0037] Fluidity: 300mm

[0038] Pressure bleeding rate: 0%

[0039] Free expansion rate: 0.08%

[0040] The preparation method of the above-mentioned high-strength grouting material containing ultra-fine powder is as follows: the grouting material is pre-mixed, packaged, and then directly added to the mixing water at the construction site and fully stirred before use without vibration. If the gel time of the pres...

Embodiment 2

[0042] A high-strength grout containing superfine powder, the composition and weight percentage of the grout are:

[0043] Sulphoaluminate cement 21%,

[0044] limestone powder 5%,

[0045] Silica fume 10%,

[0046] Lignosulfonate-based water reducer 0.3%,

[0047] Ethyl hydroxyethyl cellulose 0.02%,

[0048] Construction sand 52%,

[0049] Mix water 12%.

[0050] The performance of this superfine powder high-strength grouting material is as follows:

[0051] Compressive strength R 6h = 20.1MPa, R 1d =57.4MPa,R 7d =62.3MPa

[0052] Fluidity: 285mm

[0053] Pressure bleeding rate: 0%

[0054] Free expansion rate: 0.11%

[0055] The preparation method of the above-mentioned high-strength grouting material containing ultra-fine powder is as follows: the grouting material is pre-mixed, packaged, and then directly added to the mixing water at the construction site and fully stirred before use without vibration.

Embodiment 3

[0057] A high-strength grout containing superfine powder, the composition and weight percentage of the grout are:

[0058] Sulphoaluminate cement 15%,

[0059] Finely ground fly ash 9%,

[0060] Mixture of silica fume and finely ground slag 7%,

[0061] Naphthalene superplasticizer 0.1%,

[0062] Hydroxyethylcellulose 0.03%,

[0063] Construction sand 53%,

[0064] Mix water 16%.

[0065] The performance of this superfine powder high-strength grouting material is as follows:

[0066] Compressive strength R 6h = 7.8MPa, R 1d =27.3MPa,R 7d =41.2MPa

[0067] Fluidity: 310mm

[0068] Pressure bleeding rate: 0%

[0069] Free expansion rate: 0.06%

[0070] The preparation method of the above-mentioned high-strength grouting material containing ultra-fine powder is as follows: the grouting material is pre-mixed, packaged, and then directly added to the mixing water at the construction site and fully stirred before use without vibration. If the gel time of the present inv...

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Abstract

The present invention discloses high-strength grouting material containing ultra-fine powder and a method for producing the high-strength grouting material containing the ultra-fine powder, which comprises the components by weight: 15 to 21 percent of sulphoaluminate cement, 5 to 9 percent of ultra-fine inert powder, 6 to 10 percent of ultra-fine active powder, 0.1 to 0.4 percent of water-reducing agent,0.01 to 0.03 percent of thickening agent, 52 to 67 percent of building sand and 12 to 18 percent of mixing water. The present invention adopts the sulphoaluminate cement as the main gelled material to be mixed with appropriate ultra-fine powder materials as well as less organic compound, thereby being characterized in flat shift, vibro-free, early strength, high strength, micro inflation, abrasion resistance, good plasticity preservation and aging resistance as well as multiple use functions and simple operation and wide application.

Description

(1) Technical field [0001] The invention relates to a grouting material in construction engineering. (2) Background technology [0002] For a long time, grouting material has been a kind of building material with a large amount of application and a wide range of applications in construction engineering. Especially for self-leveling materials, gypsum-based, cement-based and polymer cement self-leveling mortars have been developed successively, which are widely used in mechanical equipment installation and reinforcement repair projects. With the development of social economy, the amount of high-strength grouting materials is increasing. [0003] At present, when using cement-based grouting materials, micro-cracks are likely to occur due to the volume shrinkage of ordinary Portland cement, which will lead to the lack of compactness under the bearing plate after the support is installed. In addition, the strength of cement-based grouting materials develops slowly and has poor d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06C04B14/06C04B22/06C04B18/08
CPCC04B28/06C04B2111/62Y02W30/91C04B14/06C04B14/28C04B18/141C04B18/146C04B20/0092C04B2103/302C04B2103/44C04B18/08
Inventor 路来军王安领王旻武俊宇杨和平
Owner 北京新奥混凝土集团有限公司
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