Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for testing sulfate attack resistance of C3S hydration system by using dialysis bag

A sulfate-resistant and dialysis bag technology, applied in measuring devices, analytical materials, weather resistance/light resistance/corrosion resistance, etc., can solve problems such as inconsistency and ignore effects, and achieve the effect of small workload and simple production process

Active Publication Date: 2019-09-06
UNIV OF JINAN
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the sulfate attack resistance of the hydration system, many scholars use the method of synthesizing C-S-H gel with a certain calcium-silicon ratio (Cement and Concrete Research, volume 69, pages 37-49), but the research on C-S-H gel The influence of CH in the hydration system on the erosion process is ignored, which makes the research results inconsistent with the actual situation

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 testing sulfate attack resistance of C3S hydration system by using dialysis bag
  • Method for testing sulfate attack resistance of C3S hydration system by using dialysis bag
  • Method for testing sulfate attack resistance of C3S hydration system by using dialysis bag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Will C 3 S and water were made into a test block with a size of Ф1.8 × 2 cm according to a water-cement ratio of 0.4, and the obtained test block was cured for 28 days in a standard curing environment (20±3°C, RH≥95%), and then the cured The test block was ground into powder, all passed through a 200-mesh sieve, and vacuum-sealed for storage to obtain hydrated unadmixed C 3 S powder.

[0024] to C 3 Add its quality 1 to S respectively wt. % nano-silica (NS), 3 wt. % nano-silica (NS), 10 wt. % silica fume (SF), 30 wt. % fly ash (FA) and 30 wt. % mineral powder (GGBS), the way of adding is to replace C 3 S, and then mix the obtained mixtures with water according to the water-cement ratio of 0.4 to make test blocks with a size of Ф1.8 × 2 cm, and maintain the obtained test blocks in a standard curing environment (20±3°C, RH≥95%) 28d, then grind the cured test piece into powder, pass through a 200-mesh sieve, vacuum-seal and store it for later use, and obtain t...

Embodiment 2

[0033] Will C 3 S and water were made into a test block with a size of Ф1.8 × 2 cm according to the water-cement ratio of 0.4, and the obtained test block was cured in a standard curing environment (20±3°C, RH≥95%) for 14 days to complete the hydration, and then Grind the hydrated test block into powder, pass through a 200-mesh sieve, and store in a vacuum seal until use.

[0034] Weigh 0.8 g of hydrated C 3 S powder, put into a dialysis bag (RC grade dialysis bag, Mwco: 10 kD) with one end sealed, then inject 3 ml of saturated calcium hydroxide solution, squeeze out the excess air in the dialysis bag, and seal the other end of the dialysis bag with a dialysis clamp .

[0035] Place the dialysis bag into 5 tubes containing 400 ml wt. % sodium sulfate solution in a beaker, ensure that the entire dialysis bag is immersed in the solution, seal the beaker with plastic wrap, and place it in a standard curing environment for 10 days.

[0036] After soaking for 10 days, part of ...

Embodiment 3

[0038] Will C 3 S and water were made into a test block with a size of Ф1.8 × 2 cm according to a water-cement ratio of 0.4, and the obtained test block was cured for 60 days in a standard curing environment (20±3°C, RH≥95%) to complete the hydration, and then Grind the hydrated test block into powder, pass through a 200-mesh sieve, and store in a vacuum seal until use.

[0039] Weigh 1 g of hydrated C 3 S powder, put into a dialysis bag (RC grade dialysis bag, Mwco: 10 kD) with one end sealed, then inject 3 ml of saturated calcium hydroxide solution, squeeze out the excess air in the dialysis bag, and seal the other end of the dialysis bag with a dialysis clamp .

[0040] Place the dialysis bag into 500 ml of wt. % sodium sulfate solution in a beaker, ensure that the entire dialysis bag is immersed in the solution, seal the beaker with plastic wrap, and place it in a standard curing environment for 28 days.

[0041] After soaking for 28 days, part of the contents of the ...

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
Login to View More

Abstract

The invention discloses a method for testing sulfate attack resistance of a C3S hydration system by using a dialysis bag. Hydrated C3S and calcium hydroxide solution are placed in the dialysis bag; after being sealed, the dialysis bag is immersed into sulfate solution; after being soaked, the dialysis bag is taken out; and performance of a C3S hydration product after a sulfate attack is tested. According to the method, in the process of simulating interaction of a cement-based material and external sulfate solution, influence of compactness of a matrix on the attacking course in the attackingprocess is stripped off, hydration system composition influence caused by solution replacement is eliminated, and the attacking course is accelerated. The method is simple in sample production processand small in workload, can accelerate the attacking course in the process of effectively simulating ion exchange inside the matrix of the C3S hydration system and in an external attacking environment, can rapidly obtain an experimental result, and provides wider prospect for application of the dialysis bag in the research in performance of the cement-based material.

Description

technical field [0001] The present invention relates to a C 3 The test method for the sulfate attack resistance of S (tricalcium silicate) hydration system specifically relates to a method that is easy to operate and can accurately reflect the effect of sulfate attack on C 3 Test method for the effect of hydration systems. Background technique [0002] The sulfate corrosion resistance of cement-based materials has always attracted people's attention. The sulfate corrosion of cement-based materials is essentially the process of ion exchange and chemical reaction between the hydration system of cement-based materials and sulfate in the external environment. At present, the method of researching the sulfate attack resistance of cement-based materials is mainly to use larger-sized clean slurry, mortar or concrete test blocks for testing, and even several years of erosion are required to obtain the experimental results during the testing process. In the study of sulfate attack,...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00
CPCG01N17/00
Inventor 程新郭照恒侯鹏坤陈衡刘霞李琴飞黄永波张丽娜卢晓磊王守德
Owner UNIV OF JINAN
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com