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Title:

Field Performance of Stabilized Blended Calcium Sulfate Materials Under Accelerated Pavement Testing
Cover of Field Performance of Stabilized Blended Calcium Sulfate Materials Under Accelerated Pavement Testing

Accession Number:

01124892

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

Blended Calcium Sulfate (BCS) is a recycled fluorogypsum mixture that has been used in Louisiana as a pavement base layer for more than a decade. Without further chemical stabilization, the major concern of using raw BCS as a pavement structural layer is its moisture susceptibility. It could cause both short-term construction difficulties and long-term performance problems. In order to verify the efficiency of BCS stabilization schemes that was obtained from laboratory results and further assess the field performance of stabilized BCS materials as well as related cost benefits, three accelerated pavement test sections including two of different stabilized BCS bases and one of a crushed stone base were recently tested at the Louisiana Pavement Research Facility (PRF) in Port Allen, LA. The three sections shared a common pavement structure. The only difference was the base course materials. Each test section was instrumented with one multi-depth deflectometer and two pressure cells for measuring related pavement responses. Surface distress survey and the falling weight deflectometer (FWD) tests were performed at the end of every 25,000 load repetitions. The overall accelerated loading results indicated that a test section containing the GGBFS stabilized BCS base outperformed other two sections by a significantly large margin. FWD backcalculation results indicated that the GGBFS stabilized BCS base generally possessed an in situ modulus value higher than that for an asphalt concrete layer and performed like a lean concrete. Cost benefit analysis results further indicated that when using the GGBFS stabilized BCS in lieu of a stone base in a flexible pavement design, the asphalt concrete thickness could be readily reduced and thus the construction costs might be saved immediately.

Monograph Accession #:

01120148

Report/Paper Numbers:

09-2063

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Wu, Zhong
Chen, Xingwei
Mohammad, Louay N
Zhang, Zhongjie

Pagination:

18p

Publication Date:

2009

Conference:

Transportation Research Board 88th Annual Meeting

Location: Washington DC, United States
Date: 2009-1-11 to 2009-1-15
Sponsors: Transportation Research Board

Media Type:

DVD

Features:

Figures; References (12) ; Tables (5)

Subject Areas:

Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways

Source Data:

Transportation Research Board Annual Meeting 2009 Paper #09-2063

Files:

PRP, TRIS, TRB

Created Date:

Jan 30 2009 6:23PM