Test Specifications for SPST and HWTT

Walubita, Lubinda F.; Nyamuhokya, Tito; Lee, Sang Ick

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Test Specifications for SPST and HWTT

2019-02-01
By Walubita, Lubinda F. ; Nyamuhokya, Tito ; Lee, Sang Ick

File Language:

English

Details

Creators:

Walubita, Lubinda F. ; Nyamuhokya, Tito ; Lee, Sang Ick
Corporate Creators:

Texas A&M Transportation Institute
Corporate Contributors:

Texas. Dept. of Transportation. Research and Technology Implementation Office ; United States. Department of Transportation. Federal Highway Administration
Subject/TRT Terms:
Publication/ Report Number:

5-6744-01-P1
Resource Type:

Tech Report
Geographical Coverage:

United States
Corporate Publisher:

Texas A&M Transportation Institute
Abstract:

This document is divided into two major parts: Part A and B. Part A documents some proposed modifications to the Hamburg wheel-tracking test (HWTT) and Tex 242-F test procedure, whereas Part B documents the proposed tentative specification and test procedures for the simple punching shear test (SPST). For Part A (HWTT specification), the major modification is in Section 6.5 where the procedure to handle mixtures at higher HWTT test temperatures is described. TxDOT Project 5-6744-01 found most hot mix asphalt (HMA) mixtures fail rapidly when subjected to higher HWTT temperatures (60°C). Nevertheless, those that survive require a closer look onto the response rutting plots and determination if adjustments are needed as explained in Section 6.5. Part B is a tentative proposed draft specification for SPST testing. The major output of this SPST protocol are HMA shear strength, shear strain, shear modulus, shear strain energy, and shear strain energy index. Of all these SPST parameters, only shear strength and shear strain energy index were found to have a good correlation with field rutting and HWTT testing (1, 2, 3).
Format:

PDF
Funding:

5-6744-01
Download URL:

https://rosap.ntl.bts.gov/view/dot/59098/dot_59098_DS1.pdf
File Type:

[PDF - 602.08 KB]
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha256:16a42ccb025d67f2abec82626d6628ac40a2599e3f38cdda2f812d77c168706b

File Language:

English

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