AASHTO T 104-22 利用硫酸钠和硫酸镁检测集料稳定性的标准试验方法 2022

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Standard Method of Test for

Soundness of Aggregate

by Use of Sodium Sulfate

or Magnesium Sulfate

AASHTO Designation: T 104-22

Technically Revised: 2022

Technical Subcommittee: 1c, Aggregates

American Association of State Highway and Transportation Officials

555 12th Street NW, Suite 1000

Washington, D.C. 20004

TS-1c T 104-1 AASHTO

Standard Method of Test for

Soundness of Aggregate by Use of

Sodium Sulfate or Magnesium Sulfate

AASHTO Designation: T 104-22

Technically Revised: 2022

Technical Subcommittee: 1c, Aggregates

1. SCOPE

1.1. This method covers the procedure to be followed in testing aggregates to determine their

resistance to disintegration by saturated solutions of sodium sulfate or magnesium sulfate. This is

accomplished by repeated immersion in saturated solutions of sodium or magnesium sulfate

followed by oven drying to partially or completely dehydrate the salt precipitated in permeable

pore spaces. The internal expansive force, derived from the rehydration of the salt upon re-

immersion, simulates the expansion of water on freezing. This test method furnishes information

helpful in judging the soundness of aggregates subject to weathering action, particularly when

adequate information is not available from service records of the material exposed to actual

weathering conditions. Attention is called to the fact that test results by the use of the two salts

differ considerably and care must be exercised in fixing proper limits in any specifications that

may include requirements for these tests.

1.2. The values stated in SI units are to be regarded as the standard.

1.3. This standard may involve hazardous materials, operations, and equipment. This standard does

not purport to address all of the safety concerns associated with its use. It is the responsibility of

the user of this procedure to consult and establish appropriate safety and health practices and to

determine the applicability of regulatory limitations prior to its use. Regulatory information for

the chemicals used in this standard can be found in 29 CFR 1910.1200.

1.4. The quality of the results produced by this standard are dependent on the competence of the

personnel performing the procedure and the capability, calibration, and maintenance of the

equipment used. Agencies that meet the criteria of R 18 are generally considered capable of

competent and objective testing/sampling/inspection/etc. Users of this standard are cautioned that

compliance with R 18 alone does not completely assure reliable results. Reliable results depend

on many factors; following the suggestions of R 18 or some similar acceptable guideline provides

a means of evaluating and controlling some of those factors.

2. REFERENCED DOCUMENTS

2.1. AASHTO Standards:

 M 231, Weighing Devices Used in the Testing of Materials

 M 339M/M 399, Thermometers Used in the Testing of Construction Materials

 R 18, Establishing and Implementing a Quality Management System for Construction

Materials Testing Laboratories

 T 27, Sieve Analysis of Fine and Coarse Aggregates

TS-1c T 104-2 AASHTO

2.2. ASTM Standards:

 C670, Standard Practice for Preparing Precision and Bias Statements for Test Methods for

Construction Materials

 E1, Standard Specification for ASTM Liquid‐in‐Glass Thermometers

 E11, Standard Specification for Woven Wire Test Sieve Cloth and Test Sieves

 E100, Standard Specification for ASTM Hydrometers

 E230/E230M, Standard Specification for Temperature‐Electromotive Force (emf) Tables for

Standardized Thermocouples

 E879, Standard Specification for Thermistor Sensors for General Purpose and Laboratory

Temperature Measurements

 E2877, Standard Guide for Digital Contact Thermometers

2.3. Federal Standard:

 Fed. Std. No. 29, CFR 1910.1200 OSHA Hazard Communication Standard; see also

Permissible Exposure Limits—Annotated Tables. Available from

https://www.osha.gov/dsg/annotated-pels/

2.4. International Electrotechnical Commission Standard:

 IEC 60584‐1:2013, Thermocouples ‐ Part 1: EMF Specifications and Tolerances

3. APPARATUS

3.1. Sieves—With square openings of the following sizes conforming to ASTM E11, for sieving the

samples in accordance with Sections 5, 6, and 8:

4.75 mm (No. 4) 63 mm (21/2 in.)

4.00 mm (No. 5) 50 mm (2 in.)

2.36 mm (No. 8) 37.5 mm (11/2 in.)

1.18 mm (No. 16) 31.5 mm (11/4 in.)

600 μm (No. 30) 25.0 mm (1 in.)

300 μm (No. 50) 19.0 mm (3/4 in.)

150 μm (No. 100) 16.0 mm (5/8 in.)

12.5 mm (1/2 in.)

9.5 mm (3/8 in.)

8.0 mm (5/16 in.)

3.2. Containers for Samples—Sieves 203.2 mm (8 in.) in diameter for each separate size fractions of

aggregate during test. Used, out-of-tolerance sieves according to ASTM E11, in acceptable

condition, may be used as containers (Note 1).

3.2.1. Coarse Aggregate—2.36-mm (No. 8) Size.

3.2.2. Fine Aggregate—250-μm (No. 60) Size.

Note 1—Sieves 203.2 mm (8 in.) in diameter may be substituted with containers that permit free

access of solution to the sample and drainage of the solution from the sample without loss of

aggregate. Substitution with such containers may affect results. Referee testing, comparison

testing, or testing of aggregate to be used in critical applications must be performed using sieves

203.2 mm (8 in.) in diameter.

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标签： #标准试验 #硫酸钠 #硫酸镁

摘要：

本规范为AASHTO T 104-22，全称为《利用硫酸钠和硫酸镁检测集料稳定性的标准试验方法》（2022年版），是美国国家公路与运输协会发布的最新测试标准。该标准规定了一种加速老化试验方法，通过将集料样品反复浸入硫酸钠或硫酸镁溶液中，再经干燥和结晶过程，模拟集料在冻融循环或化学侵蚀等自然条件下的耐受能力，从而评估其长期耐久性与稳定性。该方法广泛应用于道路、桥梁及混凝土工程中的骨料质量控制，适用于粗集料和细集料，为工程选材和施工验收提供关键依据。2022年版本更新了试验细节、温度控制与结果评定标

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AASHTO T 104-22 利用硫酸钠和硫酸镁检测集料稳定性的标准试验方法 2022

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