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

Vacuum stirring process for ultra-high-performance concrete

An ultra-high performance, vacuum mixing technology, applied in cement mixing equipment, clay preparation equipment, chemical instruments and methods, etc., can solve problems such as unpredictable effects, achieve improved density, uniform dispersion, and improved mechanical properties and durability. Effect

Inactive Publication Date: 2019-09-27
黄贺明
View PDF16 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned technologies are all aimed at the research of ordinary concrete. Since the systems of ordinary concrete and ultra-high-performance concrete are different, the effect of the above-mentioned methods directly applied to ultra-high-performance concrete is unpredictable, and further research is needed.

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
  • Vacuum stirring process for ultra-high-performance concrete
  • Vacuum stirring process for ultra-high-performance concrete
  • Vacuum stirring process for ultra-high-performance concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] S1 prepares mixer A and mixer B;

[0024] S2 Put 2.6kg of Portland cement (P.O 52.5), 1.5kg of silica fume, 0.8kg of water and 0.13kg of polycarboxylate superplasticizer into mixer A and stir for 3 minutes to obtain a uniformly stirred cementitious material slurry;

[0025] S3 Put 4.0kg of quartz sand (about 0.5mm) and 0.8kg of steel fiber (about 0.3×12mm) into the mixer B and stir for 3 minutes to obtain a uniformly stirred mixture;

[0026] S4 puts the mixture obtained in step S3 into the uniformly stirred cementitious material slurry in step S2, and continues to stir for 2.5 minutes under the vacuum condition of 0.08±0.02Mpa to obtain uniformly stirred ultra-high performance concrete.

Embodiment 2

[0028] S1 prepares mixer A and mixer B;

[0029] S2 Put 3.0kg of Portland cement (P.O 52.5), 1.0kg of silica fume, 0.6kg of water and 0.15kg of polycarboxylate superplasticizer into mixer A for stirring, and stir for 2 minutes to obtain a uniformly stirred cementitious material slurry;

[0030] S3 Put 3.5kg of quartz sand (about 0.5mm) and 1.2kg of steel fiber (about 0.3×12mm) into the mixer B and stir for 2 minutes to obtain a uniformly stirred mixture;

[0031] S4 puts the mixture obtained in step S3 into the uniformly stirred cementitious material slurry in step S2, and continues to stir for 3 minutes under the vacuum condition of 0.08±0.02Mpa to obtain uniformly stirred ultra-high performance concrete.

Embodiment 3

[0033] S1 prepares mixer A and mixer B;

[0034] S2 Put 2.3kg of Portland cement (P.O 52.5), 2.0kg of silica fume, 1.0kg of water and 0.11kg of polycarboxylate superplasticizer into mixer A and stir for 4 minutes to obtain a uniformly stirred cementitious material slurry;

[0035] S3 Put 4.5kg of quartz sand (about 0.5mm) and 0.4kg of steel fiber (about 0.3×12mm) into the mixer B and stir for 4 minutes to obtain a uniformly stirred mixture;

[0036] S4 puts the mixture obtained in step S3 into the uniformly stirred cementitious material slurry in step S2, and continues to stir for 2 minutes under the vacuum condition of 0.08±0.02Mpa to obtain uniformly stirred ultra-high performance concrete.

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 relates to the technical field of ultra-high-performance concrete stirring, and discloses a vacuum stirring process for ultra-high-performance concrete. The vacuum stirring process comprises the following steps that a stirrer A and a stirrer B are prepared; cement, a blending material, part of water and an additive are put into the stirrer A to be stirred to obtain a uniformly-stirred cementing material slurry; fine aggregate and fibers are put into the stirrer B to be stirred to obtain a uniformly-stirred mixture; the mixture is put into the uniformly-stirred cementing material slurry to be continuously stirred, moreover, stirring is performed continuously under a vacuum condition to obtain the uniformly-stirred ultra-high performance concrete. According to the vacuum stirring process, the compressive strength of the ultra-high performance concrete is improved, moreover, the gas content and the electric flux are reduced, and meanwhile, the characteristics that the stirring efficiency is high, the process is simple, stirring is uniform, the abrasion of the fine aggregate and the fibers to blades and a lining plate is reduced and the like are achieved.

Description

technical field [0001] The invention relates to the technical field of concrete mixing technology, in particular to an ultra-high performance concrete vacuum mixing technology. Background technique [0002] Ultra-high performance concrete is a kind of well-graded quartz fine sand (without coarse aggregate), cement, A new type of ultra-high-strength concrete with ultra-high strength, low brittleness, excellent durability and broad application prospects composed of quartz powder, silica fume, high-efficiency water-reducing agent, and fiber. Due to the large amount of ultra-high-performance concrete superplasticizer, low water-binder ratio, higher viscosity than ordinary concrete, and the addition of steel fibers, the mixing process causes greater wear on the mixer blades and liners, and the mixing time is longer than ordinary concrete. The stirring time is long, the stirring uniformity is not good, and the internal gas content is relatively large. [0003] Vacuum degassing a...

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): B28C5/46B28C5/08
CPCB28C5/08B28C5/46
Inventor 刘福财肖敏张信祯黄贺明郑增勇
Owner 黄贺明
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