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Ultra-high performance cement based groove type profile

An ultra-high-performance, cement-based technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of poor construction convenience, not yet appeared, and high brittleness

Inactive Publication Date: 2014-07-23
SHANGHAI LUOYANG NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to the low strength and high brittleness of ordinary concrete, the structural members made of it have large cross-sections and poor construction convenience, so there has not yet been a lightweight and convenient assembled profile member similar to steel structural profiles.

Method used

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  • Ultra-high performance cement based groove type profile
  • Ultra-high performance cement based groove type profile
  • Ultra-high performance cement based groove type profile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Ultra-high performance cement-based channel profiles, of which:

[0082] H=400mm, B=200mm, D=30mm, t=30mm, R=20mm, R 1 =3mm;

[0083] Ultra-high performance cement-based composite material, including cementitious material, water and water reducer, the volume of cement accounts for 21%, the cement is P·I cement with a strength grade of 52.5, and the mineral admixture is silica fume and powder Coal ash, accounting for 52.5%.

[0084] The ratio fraction of cement, silica fume and fly ash is numerically analyzed and calculated through the ideal accumulation curve and its particle size cumulative distribution curve;

[0085] 1) The ideal stacking curve formula is:

[0086] P sd 100 / max / ;

[0087] Among them, P sd is the percentage of particles passing through the sieve, A is an empirical constant, d is the diameter of the sieve, D max is the maximum particle size of the particle;

[0088] The value of the empirical constant A is determined by the formula according t...

Embodiment 2

[0110] Ultra-high performance cement-based channel profiles, of which:

[0111] H=400mm, B=400mm, D=50mm, t=30mm, R=25mm, R 1 =5mm;

[0112] Ultra-high performance cement-based composite material, including cementitious material, water and water reducer, the volume of cement accounts for 48.5%, the cement is P·I cement with a strength grade of 62.5, and the mineral admixture is silica fume, powder Coal ash and slag powder, volume accounts for 17.6%%; Each component distribution fraction of cementitious material is by the calculation method of embodiment 1, gets X c =0.734,X sf =0.107,X fa =0.088 and X bs =0.071. The water-binder ratio W / B=0.144, the admixture uses the polycarboxylate superplasticizer solution, and the dosage is 2.3% of the mass of the gelling material.

[0113] The volume percentage of the main materials used in ultra-high performance cement-based composites is as follows:

[0114]

[0115] The dosage and quality ratio of each material of ultra-high ...

Embodiment 3

[0123] Ultra-high performance cement-based channel profiles, of which:

[0124] H=400mm, B=200mm, D=30mm, t=30mm, R=20mm, R 1 =3mm;

[0125] Ultra-high-performance cement-based composite material, including cementitious material, fine aggregate, steel fiber, water and water reducing agent, the volume of cement accounts for 26.5%, the cement is P·II cement with a strength grade of 52.5, and the mineral mixed The composite materials are silica fume, fly ash and mineral powder, accounting for 15.8%. Each component distribution fraction of gelling material is by the calculation mode of embodiment 1, gets X c =0.626,X sf =0.161,X fa =0.102 and X bs =0.111. The fine aggregate is natural sand with a fineness modulus of 1.4, and its volume is 0.811 of that of the cementitious material. The steel fibers are copper-plated steel fibers with a diameter of 0.2mm and a length of 13mm, and the volume content is 1.5%. The water-binder ratio W / B=0.162, the admixture uses the polycarbox...

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Abstract

The invention relates to an ultra-high performance cement based groove type profile cast from an ultra-high performance cement based composite material. The cement based groove type profile meets the conditions of: H / B=0.8-3; D / B=0.1-0.5; t / H=0.05-0.5; R / B=0.05-0.5; and R1 / t=0.1-0.5. By optimizing the grain gradation of a multi-element cementing material and the grain gradation of an aggregate, and using a water reducing agent and other chemical additives, under the premise that concrete has good flowability, the ultra-high performance cement based composite material involved in the invention can reach compressive strength of over 170MPa under 28d standard curing. By means of fiber reinforced reinforcement and other technologies, the ultra-high performance cement based composite material enables the ultra-high performance cement based profile to acquire material component properties similar to those of section steel. By applying the profile provided by the invention to beams, columns, piles and other structures of prefabricated buildings, the buildings can have a construction speed similar to that of a steel structure, but can have higher corrosion resistance and fire resistance than steel structure profiles.

Description

technical field [0001] The invention relates to an ultra-high-performance cement-based channel profile, which is an assembled cement-based channel profile, and more specifically, relates to an ultra-high-performance cement-based channel profile poured from ultra-high-performance cement-based composite materials profiles. Background technique [0002] Due to the low strength and high brittleness of ordinary concrete, the structural members made of it have large cross-sections and poor construction convenience. Therefore, light and convenient assembled profile members similar to steel structural profiles have not yet appeared. The emergence of ultra-high performance cement-based composite materials has made it possible to assemble cement-based profiles. Ultra-high-performance cement-based composite materials use fiber-reinforced reinforcement and other technologies to enable ultra-high-performance cement-based profiles to obtain material component properties similar to steel ...

Claims

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Application Information

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IPC IPC(8): E04C3/20E04C3/34C04B28/00C04B18/08C04B14/48C04B16/06
CPCY02W30/91
Inventor 施慧聪刘国平赵正王俊颜姚欣刘健
Owner SHANGHAI LUOYANG NEW MATERIAL TECH
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