Penetration-resistant ultra-high performance concrete

An ultra-high-performance, concrete technology, applied in the field of concrete materials, can solve the problems of high brittleness of ultra-high-strength concrete, inability to meet the requirements of high resistance and high penetration resistance of protective engineering, and weak penetration resistance. Excellent anti-penetration ability, high effect of anti-penetration ability

Inactive Publication Date: 2015-09-16
PLA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the current protection projects mostly use ordinary strength (C30~C50) grade concrete or ordinary fiber reinforced concrete, which has relatively weak penetration resistance, and the existing ultra-high-strength concrete is brittle and cannot adapt to modern warfare. Requirements for high resistance, especially high penetration resistance

Method used

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  • Penetration-resistant ultra-high performance concrete
  • Penetration-resistant ultra-high performance concrete
  • Penetration-resistant ultra-high performance concrete

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] The following embodiments of the present invention adopt the same preparation process.

[0035] First, pour the glue material and fine aggregate into the forced mixer, and stir for 2-3 minutes until uniform;

[0036] Then pour in the coarse aggregate and stir for 1 min;

[0037] Add water reducing agent and water, stir for 3 minutes;

[0038] Slowly pour in steel fibers, stir for 3 minutes until the material is evenly discharged, and the penetration-resistant ultra-high performance concrete of the present invention can be obtained.

[0039] The prepared concrete was placed in the mold, vibrated on a vibrating table for 1min, and after standing for 24h, the mold was removed.

[0040] Finally, place the formed concrete specimen in a standard curing room with a temperature of 20°C ± 2°C and a humidity above 95% for curing for performance testing.

[0041] The performance detection of the embodiment is carried out according to the ordinary concrete test standard GB50081-...

Embodiment 1

[0050] Ultra-high performance corundum aggregate steel fiber reinforced concrete, including:

[0051] PI52.5 Portland cement 480kg, silica fume 80kg, fly ash 80kg, ultrafine mineral powder 160kg, fine sand with a particle size of 0.25-0.35mm 800kg, corundum gravel with a particle size of 5-20mm 1126kg, polycarboxylic acid Type superplasticizer 16kg, steel fiber 160kg. The diameter of the steel fibers is 0.175 mm and the length is 13 mm.

Embodiment 2

[0053] Ultra-high performance corundum aggregate steel fiber reinforced concrete, including:

[0054] PI52.5 Portland cement 480kg, silica fume 80kg, fly ash 80kg, ultrafine mineral powder 160kg, fine sand with a particle size of 0.25-0.35mm 800kg, corundum gravel with a particle size of 35-45mm 1126kg, polycarboxylic acid Type superplasticizer 16kg, steel fiber 160kg. The diameter of the steel fibers is 0.175 mm and the length is 13 mm.

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Abstract

The invention discloses a penetration-resistant ultra-high performance concrete. Each cubic meter of the finished product--concrete comprises the following components by weight: 377 to 480 of PI52.5 Portland cement, 63 to 80 of silica fume, 63 to 80 of fly ash, 126 to 160 of ultrafine ore powder, 629 to 800 of fine sand, 1126 to 1700 of crude corundum aggregate, 99 to 126 of water, 12.6 to 16 of polycarboxylate superplasticizer and 160 of steel fiber, wherein the unit of weight is kg. The concrete provided by the invention has good compression resistance, bending resistance and tensile strength and excellent penetration-resistance.

Description

technical field [0001] The invention belongs to the technical field of concrete materials, and in particular relates to an ultra-high performance concrete with excellent anti-penetration ability and a preparation method thereof. Background technique [0002] Concrete is widely used in the construction of protective engineering, and its anti-penetration ability has an important impact on the safety of protective engineering. [0003] However, the current protection projects mostly use ordinary strength (C30~C50) grade concrete or ordinary fiber reinforced concrete, which has relatively weak penetration resistance, and the existing ultra-high-strength concrete is brittle and cannot adapt to modern warfare. Requirements for high resistance, especially high penetration resistance. Contents of the invention [0004] The purpose of the present invention is to provide a penetration-resistant ultra-high performance concrete, which has excellent penetration resistance and physical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B14/48
Inventor 方秦吴昊宫俊刘建忠张倩倩
Owner PLA UNIV OF SCI & TECH
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