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

High-fluidity environment-friendly ultrahigh-performance concrete and preparation method thereof

An ultra-high-performance, high-fluidity technology, applied in the field of building materials, can solve problems such as practical application difficulties, poor performance of ultra-high performance concrete, and high cost, and achieve good ecological benefits, high cost performance, and reduce cement consumption.

Inactive Publication Date: 2020-07-17
福州市宇心建材科技有限公司
View PDF8 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the poor working performance and high cost of ultra-high performance concrete make it difficult to apply in practice.

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

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0039] The preparation method of the high-fluidity environment-friendly ultra-high performance concrete comprises the following steps:

[0040] 1) Put low-heat Portland cement, silica fume, fly ash microbeads, fine sand and quartz powder in a mortar mixer and stir for 3 minutes to make the various materials evenly distributed;

[0041] 2) Mix the water reducer and water and stir evenly;

[0042] 3) Add half of the mixture of water reducer and water obtained in step 2) to the mixture obtained in step 1), and stir for 3 minutes, then add the rest of the mixture of water reducer and water, and continue stirring for 3 minutes to form a cement slurry body;

[0043] 4) Add steel fiber and stir for 4 minutes, so that the steel fiber is evenly distributed in the cement paste;

[0044] 5) Carry out maintenance after pouring.

[0045]The curing methods of the high-fluidity environment-friendly ultra-high performance concrete may be: room temperature curing, standard curing, steam cur...

Embodiment 1

[0048] A kind of high-fluidity environment-friendly ultra-high performance concrete, its raw material formula is:

[0049] 52.5 grade low heat Portland cement 700 kg / m 3 ;

[0050] Fly Ash Microbeads 150 kg / m 3 ;

[0051] Silica fume 250 kg / m 3 ;

[0052] Fine sand 900 kg / m 3 ;

[0053] Quartz powder 389 kg / m 3 ;

[0054] Viscosity-reducing polycarboxylate superplasticizer 20 kg / m 3 ;

[0055] Water 120 kg / m 3 ;

[0056] Steel fiber 2.5% (solid volume ratio).

[0057] The content of tricalcium aluminate in the low-heat Portland cement used is 2.5%; the maximum particle size of fly ash microbeads is 3 μm, and the content of spherical particles is 85%; the particle size of silica fume is 0.1-0.2 μm, and the The silicon content is 96%; the fineness modulus of the fine sand is 1.9, and the maximum particle size is 90 μm; the maximum particle size of the quartz powder is 38 μm; the solid content of the water reducing agent is 30%, and the water reducing rate is 35%; T...

Embodiment 2

[0069] A high-fluidity environment-friendly ultra-high performance concrete, its raw material formula is as follows:

[0070] 42.5 grade low heat portland cement 1200 kg / m 3 ;

[0071] Fly Ash Microbeads 90 kg / m 3 ;

[0072] Silica fume 100 kg / m 3 ;

[0073] Fine sand 900 kg / m 3 ;

[0074] Quartz powder 0 kg / m 3 ;

[0075] Viscosity-reducing polycarboxylate superplasticizer 10 kg / m 3 ;

[0076] Water 200 kg / m 3 ;

[0077] Steel fiber 5% (solid volume fraction).

[0078] The content of tricalcium aluminate in the low-heat Portland cement used is 2%; the maximum particle size of fly ash microbeads is 5 μm, and the content of spherical particles is 90%; the particle size of silica fume is 0.1-0.2 μm, and the The silicon content is 94%; the fineness modulus of the fine sand is 1.8, and the maximum particle size is 120 μm; the maximum particle size of the quartz powder is 36 μm; the solid content of the water reducing agent is 30%, and the water reducing rate is 31%; ...

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

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Maximum particle sizeaaaaaaaaaa
Lengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses high-fluidity environment-friendly ultrahigh-performance concrete. The concrete is prepared by mixing low-heat Portland cement, fly ash microspheres, silica fume, fine sand, quartz powder, a water reducing agent, water and steel fibers according to a certain ratio. Pollution is produced during production of cement; however, waste fly ash microbeads of a thermal power plantare adopted to replace a part of cement in the invention, so pollution reduction and environmental protection are realized, and the obtained ultrahigh-performance concrete has very good working performance, relatively small shrinkage and relatively good crack resistance, and is convenient to construct; and compared with existing ultrahigh-performance concrete with the same water-binder ratio, glue-sand ratio and steel fiber mixing amount, the ultrahigh-performance concrete has the advantages that working performance is greatly improved, and the problem of poor working performance of the existing ultrahigh-performance concrete can be solved, so the ultrahigh-performance concrete has good economic benefits and environmental protection benefits and is suitable for large-scale popularization and application.

Description

technical field [0001] The invention relates to the technical field of building materials in civil engineering, in particular to a high-fluidity ultra-high-performance concrete and a preparation method thereof. Background technique [0002] Concrete has wide sources of raw materials, simple production process, and low price. It is the most widely used building material in civil engineering. Modern engineering requires higher performance of concrete, such as higher mechanical properties, better working performance and better durability. Conventional concrete can no longer fully meet the needs of modern engineering, and some concrete with special functions has emerged, such as ultra-high performance concrete with ultra-high mechanical properties (compressive strength greater than 100 MPa) and excellent durability. [0003] Since the emergence of ultra-high performance concrete, its advantages have become more and more prominent, such as its compressive strength is much higher...

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): C04B28/04
CPCC04B28/04C04B2111/00017C04B2201/50C04B18/082C04B18/146C04B14/06C04B2103/302C04B14/48
Inventor 唐晓静周骏宇张琦琳
Owner 福州市宇心建材科技有限公司
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