Method for measuring stressed deformation of cement-base composite material

A composite material and detection method technology, applied in the direction of material resistance, using stable tension/pressure to test material strength, etc., can solve problems such as uneven shrinkage cracks, and achieve the effect of good adhesion

Inactive Publication Date: 2002-08-14
INST OF CHEM CHINESE ACAD OF SCI
View PDF1 Cites 32 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The defects of cement-based composite materials include: (1) cracks caused by uneven shrinkage during the solidification process of cement-based composite materials; Voids formed after the material solidifies
These methods can only solve the deformation, crack detection of large concrete buildings

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
  • Method for measuring stressed deformation of cement-base composite material
  • Method for measuring stressed deformation of cement-base composite material
  • Method for measuring stressed deformation of cement-base composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] Embodiment 1: 1, sample preparation

[0094] 1), polypropylene fine denier short fiber reinforced cement mortar

[0095] Ratio: cement: standard sand: water = 1:2.5:0.44

[0096] Dosage of polypropylene fine denier short fibers:

[0097] Polypropylene fine denier short fiber: cement mortar = 1:1000 (volume ratio)

[0098] Stirring time: cement + fiber 1.5min

[0099] Cement + fiber + standard sand + water 3min

[0100] Vibration time; 2min

[0101] The standard curing time is 24 hours, demoulding, and natural curing for 28 days.

[0102] 2), the surface of the sample is coated with a conductive film

[0103] After the cement mortar and the polypropylene fine-denier short-fiber-reinforced cement mortar are naturally cured to age, the surface of the sample is treated with conductive adhesive to form a conductive film sensor, as shown in Figure (8). Figure (8) is a schematic diagram of a mortar sample coated with a conductive film on the surface.

[0...

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
Average lengthaaaaaaaaaa
Login to view more

Abstract

The invention relates to a method for checking and measuring the distortion of cement-based composite material caused by force. A conducting film as sensor, which is composed of short-cut carbon fiber, graphite power and adhesion agent, is coated on the surface of specimen of cement-based composite material. Circuit signal collector in bridge type is adopted in the invention. With the specimen ofcement-based composite material being forced, loaded and impacted, uneven distortion and cracking in the specimen of cement-based composite material can be detected by checking and measuring variation of voltage and current caused by the variation of resistance of said conducting film.

Description

technical field [0001] The invention relates to a detection method for stress deformation of a cement-based composite material, which belongs to the technical category of building materials. Background technique [0002] Cement-based composite materials are prepared from cement, water, sand aggregates and a little auxiliary materials. The hydration reaction of cement produces gelation, which constitutes the continuous phase of cement-based composite materials, and coagulates sand and gravel aggregates and auxiliary materials together to form a solid artificial stone. It is currently the largest and most widely used building material. [0003] According to the different aggregates used, cement-based composite materials can be divided into two categories: cement mortar and concrete: cement mortar is mainly prepared from cement, water and fine aggregate (sand); the preparation of concrete also needs to include coarse aggregate, that is, sand stone. Although ordinary cement-b...

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): G01N3/08G01N27/04
Inventor 王家君王笃金赵莹周勇胡先波徐端夫
Owner INST OF CHEM CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap