AASHTO TP 119-15

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Standard Method of Test for

Electrical Resistivity of a

Concrete Cylinder Tested in

a Uniaxial Resistance Test

AASHTO Designation: TP 119-151

American Association of State Highway and Transportation Officials

444 North Capitol Street N.W., Suite 249

Washington, D.C. 20001

TS-3c TP 119-1 AASHTO

Standard Method of Test for

Electrical Resistivity of a Concrete Cylinder

Tested in a Uniaxial Resistance Test

AASHTO Designation: TP 119-151

1. SCOPE

1.1. This test method covers the determination of the electrical resistivity of concrete to provide a very

rapid indication of its resistance to the penetration of chloride ions. This test method is applicable

to types of concrete where correlations have been established between this test procedure and

long-term chloride ponding procedures such as those described in ASTM C1556. Examples of

such correlations are discussed in the references (Sections 15.2. and 15.3).

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

1.3. This standard does not purport to address all of the safety problems, if any, associated with its use.

It is the responsibility of the user of this standard to establish appropriate safety and health

practices and determine the applicability of regulatory limitations prior to use.

2. REFERENCED DOCUMENTS

2.1. AASHTO Standards:

 R 39, Making and Curing Concrete Test Specimens in the Laboratory

 T 23, Making and Curing Concrete Test Specimens in the Field

 T 24M/T 24, Obtaining and Testing Drilled Cores and Sawed Beams of Concrete

2.2. ASTM Standards:

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

Construction Materials

 C1202, Standard Test Method for Electrical Indication of Concreteʼs Ability to Resist

Chloride Ion Penetration

 C1556, Standard Test Method for Determining the Apparent Chloride Diffusion Coefficient

of Cementitious Mixtures by Bulk Diffusion

3. SUMMARY OF TEST METHOD

3.1. This test method consists of measuring the resistivity of 200-mm (8-in.) or 300-mm (12-in.)

nominal length, and 100-mm (4-in.) or 150-mm (6-in.) nominal diameter cores or cylinders

through the longitudinal axis of the geometry. Alternative geometries can be used, with proper

determination of the geometry factor. A set of stainless steel plates is used as the electrodes,

between which the test sample is placed. An AC current is applied to the plates, and the

corresponding voltage is measured. From this, the resistance is determined and normalized by the

ratio of cross-sectional area to the length, termed uniaxial resistivity. The resistivity is related to

ion penetration resistance.

TS-3c TP 119-2 AASHTO

3.2. This method highlights how uniaxial resistivity can be determined using a commercially available

Wenner probe array. This equipment consists of a four pin array of electrodes used in the

measurement of surface resistivity. Current is passed between the outer probes, while potential is

measured between the inside probes. The electronic display of these units most often directly

calculates the apparent surface resistivity. In these cases, to compute uniaxial resistivity, an

additional factor of 2πa is needed, where a represents the spacing of the probes. This is described

in more detail in Section 11.1.

4. SIGNIFICANCE AND USE

4.1. This test method covers the laboratory evaluation of the uniaxial electrical resistivity of concrete

samples to provide a very rapid indication of their resistance to chloride ion penetration. Research

has shown a good correlation between resistivity and chloride exposure tests, such as ASTM

C1556, on companion cylinders cast from the same concrete mixtures (Sections 15.2 and 15.3).

Resistivity can be related to the diffusion coefficient of chloride ions by the Nernst-Einstein

equation (Section 15.4).

4.2. The electrical resistivity of concrete is a material property that depends on the resistivity of the

solution within the pores, the pore structure, and the degree of saturation.

4.3. This test method is suitable for evaluation of materials and mixture proportions for design

purposes and research and development.

4.4. The numerical results (resistivity, in kohm·cm) from this test method must be used with caution,

especially in applications such as quality control and acceptance testing. The qualitative terms in

the left-hand column of Table 1 can be used in most cases unless otherwise noted by the

specifying agency. Values in the right column in Table 1 were developed using Ohm’s law from

the classification provided by ASTM C1202 and show good agreement with relationships

provided in literature (Section 15.7).

Table 1—Chloride Ion Penetrability Classification

Chloride Ion Penetrability

Classificationa

Uniaxial Resistivity

(kohm·cm)

High <5.2

Moderate 5.2–10.4

Low 10.4–20.8

Very Low 20.8–207

Negligible >207

a Established by ASTM C1202.

4.5. The details of the test method apply to 100-mm (4 in.) and 150-mm (6 in.) nominal diameter

specimens. Other specimen diameters or geometries may be tested with appropriate changes in the

geometry factor employed in the calculating equation. (See Reference 15.8.)

4.6. Sample age may have significant effects on the test results, depending on the type of concrete and

the curing procedure. Most concretes, if properly cured, become progressively and significantly

less permeable (more resistive) with time.

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摘要：

AASHTO TP 119-15是一项由美国国家公路与运输官员协会（AASHTO）制定的标准试验方法，标题为“利用四点弯曲试验测定沥青结合料的疲劳性能”。该标准规范主要针对沥青结合料在重复循环荷载下的抗疲劳开裂能力进行评估，通过控制应变或应力模式下的四点弯曲试验，获取材料的疲劳寿命、模量衰减及损伤累积等关键性能指标，为沥青混合料设计及路面长期性能预测提供重要依据。该标准适用于热拌沥青混合料中使用的不同等级沥青结合料，尤其对评估聚合物改性沥青、高模量沥青及再生沥青结合料的疲劳特性具有重要参考价值。

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