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Grouting material for composite structure and fabricated building joint and preparation method thereof

A combined structure and grouting technology, applied in the field of combined structures, prefabricated building nodes and super high-rise buildings, can solve the problems of limited performance of grouting materials, and achieve the effects of high filling, high early strength and long-term performance stability.

Inactive Publication Date: 2020-05-08
CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In summary, due to the limited performance of existing grouting materials, it is difficult to meet the needs of modern building structures, and it is necessary to develop ultra-high strength and high ductility grouting materials with better performance.

Method used

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  • Grouting material for composite structure and fabricated building joint and preparation method thereof
  • Grouting material for composite structure and fabricated building joint and preparation method thereof
  • Grouting material for composite structure and fabricated building joint and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In the grouting materials used for pouring composite structures and prefabricated building nodes, 30% of cement, 11% of early-strength mineral admixture, 39.8% of quartz sand, 5.5% of micro-beads, 4.5% of micro-silica fume, 2.5% of expansion agent, 0.02% retarder, 0.02% defoamer, 0.1% reinforcing agent, 0.53% water reducing agent, 5.37% steel fiber, 0.66% polyvinyl alcohol fiber. Add mixing water with a mass of 11.5% of the total cementitious material, and stir evenly to form it. The cement is P.O 52.5 ordinary Portland cement, and the early-strength mineral admixture has a fineness greater than 500m 2 / kg of superfine anhydrous calcium sulfoaluminate mineral admixture, the quartz sand is 40% of the particle size of 50 mesh to 100 mesh quartz sand and 60% of the particle size of 100 mesh to 200 mesh quartz sand mixture, the expansion agent is an ettringite expansion agent, the retarder is citric acid, the defoamer is a silicone defoamer, the reinforcing agent is calcium...

Embodiment 2

[0035] Among the grouting materials used for pouring composite structures and prefabricated building nodes, 33% cement, 13% early-strength mineral admixture, 34% quartz sand, 4% micro-beads, 3% micro-silica fume, and 3% nano-silica %, expansion agent 2.65%, retarder 0.03%, defoamer 0.02%, reinforcing agent 0.15%, water reducing agent 0.65%, steel fiber 5.8%, polyvinyl alcohol fiber 0.7%. Add mixing water with 10% mass of the total cementitious material, and stir evenly to form it. The cement is P.O 52.5 ordinary Portland cement, and the early-strength mineral admixture has a fineness greater than 500m 2 / kg of superfine anhydrous calcium sulfoaluminate mineral admixture, the quartz sand is 50% of the particle size of 50 mesh to 100 mesh quartz sand and 50% of the particle size of 100 mesh to 200 mesh quartz sand mixture, the expansion agent is an ettringite expansion agent, the retarder is citric acid, the defoamer is a polyether defoamer, the reinforcing agent is calcium carb...

Embodiment 3

[0037] Among the grouting materials used for pouring composite structures and prefabricated building nodes, 38% cement, 14% early-strength mineral admixture, 28% quartz sand, 2% micro-beads, 3% micro-silica, 4.65 nano-silica %, expansion agent 2.7%, retarder 0.03%, defoamer 0.02%, reinforcing agent 0.2%, water reducing agent 0.85%, steel fiber 5.85%, polyvinyl alcohol fiber 0.7%. Add mixing water with 8% mass of the total cementitious material, and stir evenly to construct and form, wherein, the cement is P·O 52.5 ordinary Portland cement, and the early-strength mineral admixture is finer than 500m 2 / kg of superfine anhydrous calcium sulfoaluminate mineral admixture, the quartz sand is 60% of the particle size of 50 mesh to 100 mesh quartz sand and 40% of the particle size of 100 mesh to 200 mesh quartz sand mixture, the expansion agent is an ettringite expansion agent, the retarder is citric acid, the defoamer is a silicone defoamer, the reinforcing agent is calcium carbonate...

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Abstract

The invention relates to a grouting material for composite structure and prefabricated building node pouring. The grouting material is prepared from, by mass, 30%-40% of cement, 10%-20% of an early-strength mineral admixture, 25%-45% of quartz sand, 5%-15% of a superfine mineral admixture, 0.5%-5% of a composite additive and 5%-10% of fiber, and the superfine mineral admixture is two or three of microbeads, silica fume and nano-silicon dioxide. The composite additive comprises an expanding agent, a retarder, a defoaming agent, a reinforcing agent and a water reducing agent; the fiber is a mixture of steel fibers and organic fibers. The invention also discloses a preparation method of the grouting material, and the method comprises the following steps: mixing the components of the groutingmaterial into a dry mixture, packing and packaging, and the preparation method is simple. The grouting material has the advantages of micro-expansion, high filling property, ultrahigh strength, high ductility and high vibration resistance.

Description

technical field [0001] The invention relates to the field of civil engineering materials, in particular to a grouting material for pouring joints of combined structures and prefabricated buildings and a preparation method thereof, which is suitable for combined structures, joints of prefabricated buildings and super high-rise buildings. Background technique [0002] With the rapid development of social and economic levels, people have higher and higher requirements for building structures. Modern building structures require high space utilization, high construction efficiency, and stable and reliable performance. As a result, new building structures and construction methods are constantly being developed. In modern building structures, composite structures (including steel-concrete composite structures, concrete filled steel tubes) and prefabricated concrete structures are more and more widely used. In the construction process of composite structures, the concrete strength ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/70C04B111/20
CPCC04B28/04C04B2111/2038C04B2111/70C04B2201/52C04B22/142C04B14/06C04B20/0016C04B18/146C04B24/06C04B24/42C04B14/383C04B2103/302C04B14/48C04B16/0641C04B14/062C04B24/32
Inventor 韩宇栋岳清瑞张剑丁小平宋涛文侯兆新刘晓刚刘永亮
Owner CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
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