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

Nondestructive measurement method for water content of roller-compacted concrete

A technology of roller compacted concrete and measurement method, which is applied to measuring devices, instruments, material analysis by electromagnetic means, etc., can solve problems such as low work efficiency, long work cycle, radioactive pollution, etc., and achieve high work efficiency and high resolution. Effect

Inactive Publication Date: 2017-06-30
HOHAI UNIV
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional method of measuring the moisture content of RCC, such as direct sampling and drying, the traditional sampling and drying method to investigate the moisture content of RCC has a long working cycle, high cost, great destructiveness and discontinuous detection, which seriously affects the construction progress
For the most common nuclear density meter used in roller compacted concrete to measure the moisture content of roller compacted concrete, nuclear equipment not only has the disadvantages of radioactive pollution, but also the detection method has low working efficiency

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
  • Nondestructive measurement method for water content of roller-compacted concrete
  • Nondestructive measurement method for water content of roller-compacted concrete
  • Nondestructive measurement method for water content of roller-compacted concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The non-destructive measurement process of the moisture content of the roller compacted concrete described in this embodiment is as follows: figure 1 As shown, the specific measurement method is as follows:

[0020] The dielectric constant of the upper and lower surface layers of RCC is obtained through the electromagnetic reflection intensity, and then the moisture content is obtained by calculating the dielectric constant; the relationship between the dielectric constant and the moisture content is:

[0021]

[0022] In formula (1), is the water content, ε is the dielectric constant, b, a 1 , a 2 , a 3 is a coefficient, which is determined according to different concrete mix ratios.

[0023] The relational expression of described reflection intensity and dielectric constant is:

[0024]

[0025] In formula (2), A 0 is the reflection intensity of RCC surface, A s is the reflection intensity of the iron plate surface, and ε is the dielectric constant.

[...

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 a nondestructive measurement method for water content of roller-compacted concrete. According to the method, dielectric constants of an upper surface layer and a lower surface layer of the roller-compacted concrete are acquired according to electromagnetic reflection strength, and the water content is calculated on the basis of the dielectric constants. Compared with the prior art, the nondestructive measurement method has the advantages as follows: (1), surface reflection strength of the upper layer and the lower layer of the roller-compacted concrete is measured with a ground penetrating radar technology, the dielectric constants of the upper layer and the lower layer of the concrete are calibrated by means of the reflection strength, and the water content of the upper layer and the lower layer of the concrete is predicated according to the dielectric constants, and the method has the characteristics of rapidness and accuracy and can realize overall control on construction quality of the roller-compacted concrete to the greatest extent; (2), the measurement method has the advantages of high working efficiency, high resolution ratio, nondestructive performance and the like.

Description

technical field [0001] The invention belongs to the technical field of hydraulic structure detection, and relates to a method for measuring the moisture content of roller compacted concrete, in particular to a method for rapidly and nondestructively measuring the moisture content of roller compacted concrete based on ground penetrating radar technology. Background technique [0002] Roller compacted concrete is a kind of dry hard concrete with poor cement. It is mixed with water, cement, admixture, admixture, fine aggregate and graded and controlled coarse aggregate to make dry hard concrete without slump. It is mainly used for pouring concrete dam. Roller compacted concrete not only has the characteristics of small size, high strength, good self-defense performance, and overflow, but also has the advantages of simple, fast, economical construction procedures and the use of large general-purpose machinery. [0003] Roller compacted concrete is an important building material...

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): G01N27/22
CPCG01N27/223
Inventor 许军才田正宏沈振中
Owner HOHAI 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