GB/T 42272-2022 in English

VALID

The method for determining the chloride diffusion coefficient for cement mortar

Issued on:2022-12-30
Implemented on:2023-04-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $120.00
$117.00

Standard No:	GB/T 42272-2022
Document status:	VALID
Title in English:	The method for determining the chloride diffusion coefficient for cement mortar
Title in Chinese:	水泥胶砂氯离子扩散系数检测方法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2022-12-30
Implemented on:	2023-04-01
Professional Classification:	GB-National Standard
Related Keywords:	chloride ion diffusion coefficient chloride diffusion coefficient chloride ion diffusion coefficient detectors cement mortar cement mortar introduction gb/t42272-2022 standard overview gb/t42272-2022
Related Topics:	Diffusion coefficient Chloride Trace Chloride Ion Determination Method Chloride ion test method Chromium ion detection Chloride ion detection method Glue femtosecond detection Chloride ion test method Cerium ion detection method Method for detecting product ions Chloride Cerium ion detection method planar diffusion method Water Chloride Chloride ion detection method Detection method resolution Photometric Chloride Fluoride ion detection method Trace Chloride Ion Detection Chloride detection Method for Determination of Chloride Ions in Water Quality Fluoride ion detection method Chloride ion content of cement mortar Fluoride ion detection method Mud Chloride detection Na ion detection method Water Quality Chloride Ion Determination Method Fluoride ion detection method astm method chloride ion Cerium ion detection Trace Chloride Ion Test Method Chloride detection Chloride meter Total chlorine detection method Chloride detection ion detection rod Chromatographic detection method of chloride ion Chloride ion detection method in water ion detection rod Mortar Chloride Chloride ion detection in water cobalt chloride ion number detection Trace Chloride Ion Detection Chlorine detection in water Water Quality Chloride Ion Determination Method Glue femtosecond detection Detection of Chloride Ions in Water Total number of ions Chloride ion detection in water Chloride ion detection method Trace Chloride Ion Test Method Fluoride ion detection method? 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The difference between water-soluble chloride ions and chloride ions Detection formula for chloride ions Detection method of chloride ion rapid detector How to test copper ions Calculation method for detection limit of fluoride ion determination method Testing method for chloride ion high school Alloy chloride ion detection method Lead ion national standard detection method Cement chloride ion detection Blood copper ion detection method Calcium ion detection method How to detect calcium ions Food potassium ion detection method Food chloride ion detection method Food copper ion detection method Method for detecting residual chlorine in purified water systems Metallographic sandpaper mesh detection method Detection method of aluminum ions Calculation method of chloride ion detection value Chlorine gas detection method Detection methods for eight major ions in water quality Detection method of negative oxygen ions in water Chlorine gas detection method national standard How to detect chloride ions in water Cement ammonium ion testing method What are the fluoride ion detection methods? Thunder magnetic ion measurement method for lead ions Method for testing the chloride ion diffusion coefficient of cement mortar Grinding aid chloride ion detection method Hazardous waste chloride ion detection method Test block chloride ion detection Method for detecting manganese ions in water Fluoride ion detection method national standard Method for testing iron ions on titanium head Determination of chloride ion content in Baidu cement Water permeability coefficient detection method Method for determination of water retention rate of cement mortar Procurement method Urine ion detection method Aluminum ion detection method Diffusion coefficient and porosity determination methods Sodium ion detection method Deionized water detection method Ferrous ion detection method Chloride ion test block sent for inspection Chloride ion concentration detection method Water quality chloride ion detection How to test silver ions Deionized water testing Thunder magnetic ion measurement method for chloride ions Free chlorine detection method Water permeability coefficient detection method Method equation for testing chloride ion Method for detecting chloride ion content in collagen Chlorine gas detection method Zinc ion inspection method Arsenic ion detection method in water samples Endoplasmic reticulum calcium ion detection method Method for determination of water requirement of cement mortar Metal ion detection Free residual chlorine detection method Methods for determination of diffusion coefficients and partition coefficients Standard method for detection of mercury ions Chloride ion detection method national standard Testing method for free chlorine in drinking water National standard detection method for copper ions Method for testing chloride ion content in feed Ion detection electrochemical method Chloride Ion Testing International Chinese Pharmacopoeia Chloride Ion Test Method Barium ion detection method Water-soluble chloride ion detection Metal ion detection method Serum ion detection method Testing method for chloride ions in oil Detection of Thermal Diffusion Coefficient Method for detecting divalent manganese ions in water Electronic grade hydrochloric acid free chlorine detection method Sludge separation method Method for detecting chloride ion content in purified water Testing method for chloride ion content of admixtures Dispersion detection method Quantum water detection method Water quality free chlorine detection method Testing method for free chlorine in tap water frozen water chloride ion Test method for chloride ion content of cement admixtures Is there a standard value for diffusion coefficient? gb/t42272-2022 Common thermal diffusion coefficient detection Dispersion detection method Ionic strength detection method Detection methods of ion channels in botany How to detect silver ions What are the methods for detecting metal ions?

《GB/T 42272-2022水泥胶砂氯离子扩散系数检测方法》由TC184（全国水泥标准化技术委员会）归口，主管部门为中国建筑材料联合会。

Introduction

GB/T42272-2022 Standard Overview

GB/T42272-2022 "Test Method for Chloride Ion Diffusion Coefficient of Cement Mortar" is an important standard for the resistance of cement materials to chloride ion penetration, applicable to general-purpose Portland cement, marine Portland cement and other specified cement products. This standard specifies the entire process from specimen molding to test result processing, providing a scientific basis for evaluating cement performance.

Background and Significance of Standard Formulation

With the improvement of material durability requirements in engineering construction, chloride ion penetration is one of the key factors affecting concrete durability. The introduction of GB/T42272-2022 fills the gap in the field of chloride ion penetration resistance testing in the domestic cement industry and provides a standardized basis for engineering practice.

Comparative analysis of technical specifications

Standard dimensions	GB/T42272-2022	International integration	Analysis of improvement points
Detection method	Conductivity method based on Nernst-Einstein equation	In line with ISO standards	Optimized the sealing requirements of saturated salt device
Specimen specifications	100mm×100mm×50mm	In line with international general dimensions	Added a detachable test mold design
Allowable deviation	Repeatability≤10%, reproducibility≤20%	Higher than some international standards	Instrument calibration requirements have been added

Explanation of professional terms and practical application cases

Chloride ion diffusion coefficient (D): It indicates the number of chloride ions passing through a unit area per unit time, in units of m²/s. This parameter is the core indicator for evaluating the ability of cement to resist chloride ion penetration.

Vacuum saturation device: It is a key device used to quickly fill the surface of the specimen with sodium chloride solution under negative pressure conditions to ensure the consistency of the testing environment.

Conductivity method: The diffusion coefficient is calculated by measuring the conductivity change of the specimen and combining the Nernst-Einstein equation. This method is efficient and accurate.

Actual Application Case Analysis

A certain offshore project used the GB/T42272-2022 standard to test cement performance. The results showed that its chloride ion diffusion coefficient was 1.8×10⁻¹² m²/s, which met the evaluation level of "high" resistance to chloride ion penetration. Therefore, the project chose offshore silicate cement with better durability, which effectively extended the service life of the project.

Standard Implementation Recommendations

Laboratory Configuration Recommendations:Equipped with mixers and vibration tables that meet JC/T681, JC/T723 and other standards, and regularly calibrated vacuum saturation devices and chloride ion diffusion coefficient detectors.

Staff Training Recommendations:Focus on training test personnel on the operating specifications of specimen molding, saturation treatment and data collection to ensure the accuracy of test results.

Quality Control Recommendations: Establish a complete test record management system and regularly participate in proficiency testing programs (such as CNAS PT) to ensure consistency in testing between laboratories.

More samples: JGJ 94-2008 GB 50021-2001(2009) GB 18306-2015

Sample only — not a preview of GB/T 42272-2022

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