AASHTO T 346-13

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Standard Method of Test for

Glass Beads Used in

Pavement Markings

AASHTO Designation: T 346-131

American Association of State Highway and Transportation Officials

444 North Capitol Street N.W., Suite 249

Washington, D.C. 20001

TS-4c T 346-1 AASHTO

Standard Method of Test for

Glass Beads Used in Pavement Markings

AASHTO Designation: T 346-131

1. SCOPE

1.1. The procedures for testing glass beads used in traffic markings are described in this method. This

includes the method for obtaining a representative test sample, preparation of the test specimens,

and performing the specified tests.

1.2. This test method is divided into the following parts:

1.2.1. Section 3, Sampling Glass Beads During Production;

1.2.2. Section 4, Sampling Shipments of Glass Beads Vertically from Bulk Containers;

1.2.3. Section 5, Gradation;

1.2.4. Section 6, Roundness;

1.2.5. Section 7, Refractive Index;

1.2.6. Section 8, Flow Characteristics Test—Referee Method;

1.2.7. Section 9, Moisture Resistant Coating Test—Referee Method;

1.2.8. Section 10, Flotation Test—Referee Method;

1.2.9. Section 11, Adherence Coating Oven Test—Referee Method;

1.2.10. Section 12, Alternative Flotation Test—As Permitted by Purchasing Agency;

1.2.11. Section 13, Alternative Moisture Resistance Test—As Permitted by Purchasing Agency; and

1.2.12. Section 14, Alternative Adherence Test—As Permitted by Purchasing Agency.

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

1.4. 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 standard to consult and establish appropriate safety and health practices and

determine the applicability of regulatory limitations prior to use.

TS-4c T 346-2 AASHTO

2. REFERENCED DOCUMENTS

2.1. AASHTO Standard:

 PP 74, Determination of Size and Roundness of Glass Beads Used in Traffic Markings by

Means of Computerized Optical Method

2.2. ASTM Standards:

 C1648, Standard Guide for Choosing a Method for Determining the Index of Refraction and

Dispersion of Glass

 D75/D75M, Standard Practice for Sampling Aggregates

 D1155, Standard Test Method for Roundness of Glass Spheres

 D1214, Standard Test Method for Sieve Analysis of Glass Spheres

 E105, Standard Practice for Probability Sampling of Materials

 E1617, Standard Practice for Reporting Particle Size Characterization Data

 E1994, Standard Practice for Use of Process Oriented AOQL and LTPD Sampling Plans

2.3. Other Standards:

 ANSI/ASQ Z1.4, Sampling Procedures and Tables for Inspection by Attributes

 ANSI/ASQ Z1.9, Sampling Procedures and Tables for Inspection by Variables for Percent

Nonconforming

3. SAMPLING GLASS BEADS DURING PRODUCTION

3.1. The sampling shall be random in the following ratios: 45 kg (100 lb) of sample (in full bags) per

4535 kg (10,000 lb). ASQ Z1.4 and Z1.9 may be used to monitor the quality of the product so that

it meets the requirement of the applicable detail specification. The supplier shall state in a

Declaration of Conformity the sampling plans and test methods used. Accumulation of large

quantities during the production sampling process shall be reduced to appropriate size by use of

a splitter.

Note 1—The use of splitters to reduce the large sample of glass beads to the appropriate testing

quantity is critical in minimizing sampling errors.

4. SAMPLING SHIPMENTS OF GLASS BEADS VERTICALLY FROM

BULK CONTAINERS

4.1. Sample from 200-L (55-gal) drums or other bulk containers utilizing a sample probe, as described

in Figure 1, approximately 1.2 m (48 in.) long [0.6 m (24 in.) long for 22.5-kg (50-lb) pails or

sacks].

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摘要：

AASHTO T 346-13是一项由美国国家公路与运输官员协会制定的标准试验方法，专门用于通过使用硫酸钠或硫酸镁溶液来测定粗骨料和细骨料在反复干湿循环下的抗风化能力，从而评估其耐久性和抗冻融性能。该标准广泛应用于公路、桥梁及其他交通基础设施工程中的材料质量检测，确保骨料在极端气候条件下不发生显著降解或破坏。文档详细规定了试验样本的制备、溶液浓度要求、循环次数、烘干与冷却程序以及最终筛分损失的评估标准。通过执行AASHTO T 346-13，工程师和质检人员能够有效筛选出具有潜在脆性或含杂质过高

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AASHTO T 346-13

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