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Grouting material for assembly type building reinforcement connection sleeve

A technology for building steel bars and connecting sleeves is applied in the field of building grouting materials, which can solve problems such as inability to meet technical requirements, and achieve the effects of improving the compressive and flexural strength of mortar and good water retention.

Inactive Publication Date: 2018-02-13
无为县严桥双龙建材厂(普通合伙)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, some domestic scholars have carried out relevant research on the performance of sleeve grouting material and its connection technology. Gao Anqing and others have developed a super-high-strength grouting material for steel bar joints. The test shows that the 28d compressive strength can reach 110MPa and has good performance. Fluidity and expansion rate, but this product can no longer meet the technical requirements of the current grouting material for steel bar connection

Method used

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  • Grouting material for assembly type building reinforcement connection sleeve
  • Grouting material for assembly type building reinforcement connection sleeve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A grouting material for a prefabricated building steel bar connection sleeve, the raw materials of which include by weight percentage: 45% of cement, 45% of fine aggregate, 1.9% of reinforcing agent, 0.05% of defoaming agent, and 7% of phosphogypsum composite expansion agent , Polycarboxylate superplasticizer 0.8%, retarder 0.05%, early strength agent 0.2%;

[0025] Wherein, the phosphogypsum composite expansion agent is a mixture of modified phosphogypsum, phosphorus slag fine powder and wollastonite.

Embodiment 2

[0027] A grouting material for a prefabricated building steel bar connection sleeve, the raw materials of which include by weight percentage: 60% cement, 30% fine aggregate, 2% reinforcing agent, 0.1% defoaming agent, and 7% phosphogypsum composite expansion agent , Polycarboxylate superplasticizer 0.75%, retarder 0.07%, early strength agent 0.08%;

[0028] Wherein, the phosphogypsum composite expansion agent is a mixture of modified phosphogypsum, phosphorus slag micropowder and wollastonite; the cement is a mixture of ordinary portland cement and sulphoaluminate cement.

Embodiment 3

[0030] A grouting material for a prefabricated building steel bar connection sleeve, the raw materials of which include by weight percentage: 50% cement, 38.2% fine aggregate, 1% reinforcing agent, 0.1% defoaming agent, and 10% phosphogypsum composite expansion agent , Polycarboxylate superplasticizer 0.5%, retarder 0.09%, early strength agent 0.11%;

[0031] Among them, the phosphogypsum composite expansion agent is a mixture of modified phosphogypsum, phosphorus slag powder and wollastonite, the content of modified phosphogypsum is 60wt%, the content of phosphorus slag powder is 30wt%, and the content of wollastonite is 10wt%. ; The cement is a mixture of ordinary Portland cement and sulphoaluminate cement, ordinary Portland cement accounts for 30% of the cement weight, and sulphoaluminate cement accounts for 70% of the cement weight; the fine aggregate is ordinary fine sand and quartz a mixture of sand;

[0032] The preparation process of the modified phosphogypsum compris...

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Abstract

The invention discloses a grouting material for an assembly type building reinforcement connection sleeve. The grouting material is prepared from the following raw materials in percentage by weight: 45-60% of cement, 30-45% of fine aggregates, 1-2% of an enhancer, 0.05-0.1% of a de-foaming agent, 7-10% of a phosphogypsum composite expanding agent, 0.5-0.8% of a polycarboxylic acid water reducer, 0.05-0.09% of a retarder, and 0.08-0.2% of an early strength agent, wherein the phosphogypsum composite expanding agent is a mixture of modified phosphogypsum, phosphorus slag micro powder and wollastonite. According to the grouting material disclosed by the invention, continuously graded fine sand and quartz sand are used as fine aggregates to match with the cement for use, the fine aggregates andthe cement are reasonably proportioned, and the phosphogypsum composite expanding agent is added, so that cement paste is very compact after being hardened; the grouting material is greatly improvedin strength, is matched with the enhancer, the retarder, the polycarboxylic acid water reducer and the early strength agent for use, so that mortar has good water-retaining property, plasticity and flexibility; and tensile bonding strength as well as mortar and brickwork tensile bonding strength are obviously improved, comprehensive properties are good, and using requirements of an assembly type building are met.

Description

technical field [0001] The invention relates to the technical field of building grouting materials, in particular to a grouting material for an assembled building reinforcement connecting sleeve. Background technique [0002] With the prominence of building energy consumption and building carbon emissions, the wet construction of concrete structures has a long construction period, labor-intensive, extensive construction, noise nuisance, and dust emissions. People began to pay attention to the application of prefabricated concrete in structures. And carried out some technical research and pilot application, such as Vanke Group, Nantong Construction Engineering General Contracting Co., Ltd., Shanghai Ruian Group, Longxin Construction Group Co., Ltd., etc. have carried out a certain scale of demonstration and pilot application research in the projects developed by them. Prefabricated structure (abbreviated as PC structure) is one of the key structural forms in the current proce...

Claims

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Application Information

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IPC IPC(8): C04B28/06C04B22/14
CPCC04B28/065C04B40/0039C04B2201/50C04B7/02C04B14/06C04B24/383C04B2103/50C04B22/144C04B18/145C04B22/08C04B24/24C04B2103/12C04B24/06C04B24/10C04B22/0013
Inventor 缪碧波
Owner 无为县严桥双龙建材厂(普通合伙)
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