AASHTO TP 114-15

VIP专免

老杨树 2024-10-25 22 793.94KB 7 页 15星币

侵权投诉

Standard Method of Test for

Determining the Interlayer

Shear Strength (ISS) of

Asphalt Pavement Layers

AASHTO Designation: TP 114-151

American Association of State Highway and Transportation Officials

444 North Capitol Street N.W., Suite 249

Washington, D.C. 20001

TS-2c TP 114-1 AASHTO

Standard Method of Test for

Determining the Interlayer Shear Strength

(ISS) of Asphalt Pavement Layers

AASHTO Designation: TP 114-151

1. SCOPE

1.1. This test method covers the determination of the interlayer shear strength of asphalt pavement

layers using laboratory-prepared samples or core samples.

1.2. This test can be performed on 150-mm (6-in.) or 100-mm (4-in.) diameter specimens of asphalt

pavement.

1.3. This test is applicable if the asphalt overlay layer and the base layer are both 50 ± 5 mm (2.0 ±

0.2 in.) thick. The total specimen thickness must not exceed 150 mm (6 in.). Layers may be saw

cut to the recommended layer thickness.

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

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

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

applicability of regulatory limitations prior to use.

2. REFERENCED DOCUMENTS

2.1. AASHTO Standards:

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

 T 312, Preparing and Determining the Density of Asphalt Mixture Specimens by Means of the

Superpave Gyratory Compactor

3. TERMINOLOGY

3.1. Definition:

3.1.1. interlayer shear strength (ISS)—the maximum capacity of the interface to resist failure due to

shearing stresses.

4. SUMMARY OF METHOD

4.1. The Louisiana Interlayer Shear Strength Tester (LISST) was developed for the characterization of

interface shear strength of cylindrical specimens. The device (see Figure 1) consists of two main

parts: a shearing frame and a reaction frame. Only the shearing frame is allowed to move, while

the reaction frame is stationary. A cylindrical specimen is placed inside the shearing and reaction

frames and is locked in place with collars. Loading is then applied to the shearing frame. As the

vertical load is gradually increased, shear failure occurs at the interface.

TS-2c TP 114-2 AASHTO

5. SIGNIFICANCE AND USE

5.1. Tack coats are applied on a pavement surface before overlay construction to ensure adequate

interface bond strength between two layers. If the interface cannot provide enough strength to

resist stresses due to traffic and environmental loading, shear failure may occur at the interface.

Poor interface bond strength may also accelerate the appearance of other distresses such as

slippage and surface cracks.

6. APPARATUS

6.1. Louisiana Interlayer Shear Strength Tester (LISST)—The device used for the interlayer shear

strength test shall be designed such that it adapts to most universal testing machines, has a nearly

frictionless linear bearing to maintain vertical travel, accommodates sensors that measure the

vertical and horizontal displacements, provides a specimen locking mechanism, applies consistent

normal loads, and accommodates 100- or 150-mm (4- or 6-in.), or both, sample diameters. It is

recommended that the clearance for the LISST device in the loading frame be 304.8 mm (12 in.).

The gap between the loading frame and the reaction frame shall be 12.7 mm (1/2 in.). The device is

illustrated in Figures 1 and 2.

6.2. Loading Machine—The loading machine shall produce a uniform vertical movement of 2.54 mm

(0.1 in.) per minute. Universal mechanical or hydraulic testing machine may be used such that it

can provide a displacement rate of 2.54 mm (0.1 in.) per minute. The loading device shall be

capable of meeting the minimum requirements specified in Table 1.

Note 1—Test results are expected to be different at different loading rates.

Table 1—Minimum Test System Requirements

Range Accuracy (percent)

Load, N (lbf) 0–25000 (5607) ±1.0

Loading Ram LVDT, mm (in.) 0–150 (5.9) ±0.5

Vertical, Horizontal LVDTs, mm (in.) 0–2 (0.08) ±0.5

6.3. Air Compressor—Capable of supplying of 7.5 standard cubic feet per minute (SCFM) at 40 psi to

operate the pneumatic normal load actuator (optional).

6.4. Wet Masonry Saw.

6.5. Weighing Device—The weighing device shall have sufficient capacity, be readable to 0.1 percent

of the sample mass or better, and conform to the requirements of M 231.

文档加载中……请稍候！
如果长时间未打开，您也可以点击刷新试试。

下载文档到电脑，查找使用更方便

亲，本站95%以上的标准规范都面向会员免费，办理VIP会员下载更省钱，平均每篇不到2元

立即下载 VIP免费下载

摘要：

AASHTO TP 114-15 是美国国家公路与运输官员协会发布的一项标准测试方法，全称为“Standard Method of Test for Determining the Fatigue Life of Asphalt Binders Using the Linear Amplitude Sweep (LAS) Test”。该标准通过线性振幅扫描（LAS）测试，评估沥青结合料在重复加载下的疲劳寿命，用于预测路面材料的抗疲劳开裂性能。它适用于沥青混合料设计与性能分级，帮助工程师优化道路材

展开>> 收起<<

AASHTO TP 114-15.pdf

共7页,预览4页

还剩页未读，继续阅读

声明：本文档系会员上传，若文档所含内容侵犯了您的版权或隐私，请立即通知，我们立即给予侵权申诉删除！

AASHTO TP 114-15

相关推荐

开通VIP享超值会员特权

相关内容

热门标签

举报选择: