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Anti-penetration and anti-explosion cement-based protective engineering material and preparation method thereof

An engineering material, cement-based technology, applied in the field of protection engineering, can solve the problem of not considering the composite effect of penetration and explosion, and achieve the effect of being conducive to ecological sustainable development, wide range of sources, and improved economy.

Active Publication Date: 2016-06-01
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the penetration and explosion of ground-penetrating weapons in protective engineering, the current design codes in my country only consider the penetration depth of the projectile body and the packing coefficient when the charge explodes, and do not consider the combined effect of penetration and explosion.

Method used

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  • Anti-penetration and anti-explosion cement-based protective engineering material and preparation method thereof
  • Anti-penetration and anti-explosion cement-based protective engineering material and preparation method thereof
  • Anti-penetration and anti-explosion cement-based protective engineering material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Select weight percent cement 20.6%, industrial waste residue 20.6% (silica fume: slag=2:3), nano-SiO 20.41%, yellow sand 49.5% put into the blender and mix evenly; add the mixed solution of 0.62% polycarboxylate water reducer, 0.0012% 753W type defoamer and 8.25% water into the blender, so that the solid raw materials from the dispersed state It becomes a viscous slurry state, and an ultra-high performance mortar is obtained.

[0047] Add the hybrid fiber of 3% steel fiber and 1% polyvinyl alcohol fiber into the mixer, and pour the prepared hybrid fiber reinforced ultra-high performance cement-based composite material into the mold, which has self-compacting property and does not need vibration.

[0048] Repeat the above steps for preparing ultra-high-performance mortar, add 3% steel fiber by volume into the mixer, and pour the prepared steel fiber-reinforced ultra-high-performance cement-based composite material into the mold as the middle layer.

[0049] Repeat the a...

Embodiment 2

[0053] Choose weight percent cement 18.8%, industrial waste residue 22.6% (silica fume: tailings powder=2:3), nanometer Al 2 o 3 0.83%, yellow sand 49.6% put into the blender and mix evenly; add the mixed solution of 0.74% polycarboxylate water reducer, 0.0017% 753W type defoamer and 7.45% water into the blender, so that the solid raw materials from the dispersed state It becomes a viscous slurry state, and an ultra-high performance mortar is obtained.

[0054] Add the hybrid fiber of 2% steel fiber and 1% polyvinyl alcohol fiber into the mixer, and pour the prepared hybrid fiber reinforced ultra-high-performance cement-based composite material into the mold, which has self-compacting properties and does not need vibration.

[0055] Repeat the above steps for preparing ultra-high-performance mortar, add 4% steel fiber by volume into the mixer, and pour the prepared steel fiber-reinforced ultra-high-performance cement-based composite material into the mold as the middle layer....

Embodiment 3

[0060] Select weight percent cement 18.8%, industrial waste residue 26.3% (silica fume: slag: tailings powder=2:2:1), nano-SiO 2 0.9%, yellow sand 45.1% put into the blender and mix evenly; add the mixed solution of 0.81% polycarboxylate superplasticizer, 0.0023% 753W type defoamer and 8.12% water into the blender, so that the solid raw materials change from dispersed state to into a viscous slurry state to obtain ultra-high performance mortar.

[0061] Add hybrid fibers of 2% steel fiber and 1% basalt fiber into the mixer, and pour the prepared hybrid fiber reinforced ultra-high performance cement-based composite material into the mold, which has self-compacting properties and does not require vibration.

[0062] Repeat the above steps for preparing ultra-high-performance mortar, add 4% steel fiber by volume into the mixer, and pour the prepared steel fiber-reinforced ultra-high-performance cement-based composite material into the mold as the middle layer.

[0063] Repeat th...

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Abstract

The invention discloses an anti-penetration and anti-explosion cement-based protective engineering material and a preparation method thereof. The protective engineering material is of a three-layer gradient structure made from very-high-performance mortar of the same proportioning ratio, a bottom layer is made from hybrid-fiber reinforced very-high-performance cement-based composite material, a middle layer is made from large-mixing-quantity steel-fiber reinforced very-high-performance cement-based composite material, a top layer is made from very-high-performance mortar-grouted high-strength coarse aggregate concrete, and the interfacial adhesivity is good. The very-high-performance mortar is prepared from cement, industrial residues, nanomaterials, fine aggregates, an antifoamer, a high-performance water reducing agent and water. According to the protective engineering material disclosed by the invention, hybrid fibers of the bottom layer can be used for improving the toughness and impact wave absorbing action of the structure and can also be used for improving crack resistance and high-temperature resistance; large-mixing-quantity steel fibers of the middle layer can be used for keeping the integrity of the structure and preventing bursting; high-strength coarse aggregates are added into the top layer, so that the penetration depth can be reduced, and the aim of anti-penetration and anti-explosion coupling action is achieved.

Description

technical field [0001] The invention relates to a protective engineering material, in particular to a protective engineering material with good anti-penetration and anti-explosion performance and a preparation method thereof, belonging to the technical field of protective engineering. Background technique [0002] Since the Gulf War, the warhead's attack on underground facilities has been characterized by first penetrating deeply into the cement or rocks on the upper layer of the facility, and then exploding the underground targets. In some cases, penetration and explosion occur at the same time, and the destruction of protective layers such as cement or rock is the result of the coupling of warhead penetration and detonation. Therefore, it is of great practical significance to develop new protective materials, study new protective technologies, and comprehensively update protective concepts. [0003] In order to improve the anti-penetration explosion performance, research ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/20
CPCC04B28/04C04B2111/00008C04B2111/00612C04B2111/2038C04B2201/50C04B2201/52C04B18/146C04B18/141C04B14/06C04B14/068C04B2103/302C04B2103/50C04B14/48C04B16/0641C04B14/36C04B18/12C04B14/303C04B18/023C04B14/46C04B14/368
Inventor 赖建中王会芳杨浩若代婧文王子明王祥建
Owner NANJING UNIV OF SCI & TECH
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