Ultrahigh-performance cement-based H-shaped profile

An ultra-high-performance, cement-based technology, which is applied in foundation structure engineering, sheet pile walls, buildings, etc., can solve the problems of poor construction convenience, not yet appeared, and high brittleness

Inactive Publication Date: 2014-09-03
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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  • Ultrahigh-performance cement-based H-shaped profile
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  • Ultrahigh-performance cement-based H-shaped profile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0082] H=400mm, B=200mm, t 1 =30mm,t 2 =30mm, R 1 =20mm, R 2 =3mm, R 3 =0mm;

[0083] Ultra-high performance cement-based composite material, including cementitious material, water and water reducing agent, the volume of cement accounts for 20%, 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 54%.

[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 determi...

Embodiment 2

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

[0111] H=400mm, B=400mm, t 1 =50mm,t 2 =50mm, R 1 =25mm, R 2 =5mm, R 3 =5mm;

[0112] Ultra-high performance cement-based composite material, including cementitious material, water and water reducer, the cement volume accounts for 49%, 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 account for 18% by volume; the proportions of each component of the cementitious material are calculated in Example 1 to obtain X c =0.731, X sf =0.104, X fa = 0.094 and X bs = 0.070. The water-binder ratio W / B=0.143, the admixture is 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-hig...

Embodiment 3

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

[0124] H=400mm, B=200mm, t 1 =30mm,t 2 =30mm, R 1 =20mm, R 2 =3mm, R 3 =0mm;

[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 admixt...

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Abstract

The invention relates to an ultrahigh-performance cement-based H-shaped profile poured by using an ultrahigh performance cement-based composite material. The cement-based H-shaped profile satisfies the requirement that H/B is equal to 0.8-3, t1/B is equal to 0.03-0.2, t2/H is equal to 0.03-0.2, R1/B equal to 0.05-0.5, R2/t2 is equal to 0.1-0.5 and R3/R2 is smaller than or equal to 1. According to the ultrahigh-performance cement-based composite material, the grain composition of a multi-element cementing material and the grain composition of aggregates are optimized, and chemical additives are added, so that the compressive strength of concrete reaches over 170MPa under 28d of standard curing on the premise of good flowability. Through technologies such as fibers, and reinforcement, the cement-based profile obtains the material member performance similar to profile steel and is applied to structures of beams, columns, piles and the like of assembled buildings, and the buildings have light weight and construction speed similar to steel structures and have anticorrosive and fireproof performance higher than steel structure profiles.

Description

technical field [0001] The invention relates to a prefabricated cement-based H-shaped profile, more specifically, relates to an ultra-high-performance cement-based H-shaped profile poured from an ultra-high-performance cement-based composite material. 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 sections, and are applied to beams, columns, piles and other structures ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C3/20E04C3/34E02D5/30C04B28/04C04B28/08
Inventor 施慧聪刘国平赵正王俊颜刘健姚欣
Owner SHANGHAI LUOYANG NEW MATERIAL TECH
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