Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Ultrahigh-ductility concrete for seismic engineering and preparation method of ultrahigh-ductility concrete

A concrete, ultra-high technology, applied in the field of building materials, to achieve the effect of excellent seismic performance

Active Publication Date: 2021-03-26
JIANGNAN UNIV
View PDF9 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the face of this technical problem, there is no relevant literature to give an ideal solution

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Ultrahigh-ductility concrete for seismic engineering and preparation method of ultrahigh-ductility concrete
  • Ultrahigh-ductility concrete for seismic engineering and preparation method of ultrahigh-ductility concrete
  • Ultrahigh-ductility concrete for seismic engineering and preparation method of ultrahigh-ductility concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The ultra-high ductility concrete of the present invention, its raw material is by cement, silica fume, mineral powder, quartz sand, polyethylene (PE) fiber, calcium carbonate whisker, polycarboxylate superplasticizer, hydroxyethyl cellulose, inorganic glue Coagulant, defoamer and water composition, each raw material all meets the requirement in the summary of the invention, implements according to the mixing ratio of Table 1.

[0050] Table 1 Example 1 used mix ratio (kg / m 3 , where the cement is P·O 52.5 ordinary Portland cement)

[0051]

[0052] (1) Accurately weigh raw materials by the mix ratio shown in Table 1 during implementation;

[0053] (2) Mix 20% water with calcium carbonate whiskers and hydroxyethyl cellulose, and use an integrated ultrasonic processor (brand: Fangxie, model: PZ-2000L) to ultrasonically disperse for 15 minutes to obtain material A;

[0054] (3) Mix polycarboxylate high-efficiency water reducer and inorganic gelling agent with 10% wat...

Embodiment 2

[0065] The raw materials used in this example are the same as those in Example 1, and the proportions in Table 3 are used. The preparation process and testing methods are all the same as in Example 1.

[0066] Table 3 Example 2 used mix ratio (kg / m 3 , where the cement is P·O 52.5 ordinary Portland cement)

[0067]

[0068] The test effect of this embodiment: the embodiment is at a strain rate of 10 -5 the s -1 、10 -4 the s -1 、10 -3 the s -1 and 10 -2 the s -1 The results of tensile strength and ultimate tensile strain are shown in Table 4. By comparison, it can be seen that the ultimate tensile strain of the PE-UHDC material provided in this embodiment also shows a trend of not falling but rising with the increase of strain rate, by ε&=1×10 -5 the s -1 When the 1.6% increase is ε&=1×10 -2 the s -1 When the 2.7%, an increase of 68.7%. However, compared with Example 1, the strength and ultimate tensile strain of the PE-UHDC material provided in this example are...

Embodiment 3

[0072] The raw materials used in this example are the same as those in Example 1, and the proportions in Table 5 are used. The preparation process and testing methods are all the same as in Example 1.

[0073] Table 5 Example 3 used mix ratio (kg / m 3 , where the cement is P·O 52.5 ordinary Portland cement)

[0074]

[0075] The test effect of this embodiment: the embodiment is at a strain rate of 10 -5 the s -1 、10 -4 the s -1 、10 -3 the s -1 and 10 -2 the s -1 The results of tensile strength and ultimate tensile strain are shown in Table 6. By comparison, it can be seen that the ultimate tensile strain of the PE-UHDC material provided in this embodiment also shows a trend of not falling but rising with the increase of strain rate, by ε&=1×10 -5 the s -1 When the 3.3% increase is ε&=1×10 -2 the s -1 When the 5.0%, an improvement of 51.5%. Compared with Example 1, the strength and ultimate tensile strain of the PE-UHDC material provided in this example are lower...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses ultrahigh-ductility concrete for seismic engineering and a preparation method of the ultrahigh-ductility concrete, and belongs to the technical field of building materials. Based on a micro-crack evolution effect theory, from the perspectives of improving the elasticity modulus of a reinforcing material and increasing the development scale of micro-cracks in concrete, the calcium carbonate whiskers with high strength and high elasticity modulus are introduced as an additional reinforcing material, and an inorganic gelling agent is used as an auxiliary material, the gaineffect of the calcium carbonate whiskers on the number of microcracks in the concrete is improved, so that the ultrahigh-ductility concrete material of which the ultimate tensile strain does not decrease or increase along with the increase of the strain rate is prepared, and the technical problem that the ultimate tensile strain of PEUHDC is reduced along with the increase of the strain rate is fundamentally solved.

Description

technical field [0001] The invention relates to an ultra-high ductility concrete used in earthquake-resistant engineering and a preparation method thereof, belonging to the technical field of building materials. Background technique [0002] Ultra-high ductility concrete has ultra-high tensile strain, deformation capacity and multi-joint cracking capacity, and it is widely used in the field of seismic engineering of building structures. At present, polyethylene (PE) fiber is the most commonly used fiber-reinforced material for preparing ultra-high ductility concrete. The ultimate tensile strain of polyethylene fiber reinforced ultra-high ductility concrete (PE-UHDC) is significantly higher than that of conventional polyvinyl alcohol (PVA) fiber reinforced high ductility concrete (PVA-HDC). However, similar to PVA-HDC, the uniaxial tensile behavior of PE-UHDC also has an obvious strain rate effect, that is, the ultimate tensile strain of the material varies with the strain r...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C04B28/04C04B14/38C04B111/20
CPCC04B28/04C04B14/383C04B2201/50C04B2111/2053C04B18/146C04B14/06C04B18/141C04B2103/302C04B24/383C04B2103/44C04B2103/50C04B16/0625
Inventor 张聪袁振夏超凡余志辉吴立山李志华
Owner JIANGNAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com