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Title:

Noncontact Absolute Stress Measurement for UHPC Using Raman Piezospectroscopy

Accession Number:

01698387

Record Type:

Component

Abstract:

A novel non-contact stress sensing method using the Raman piezospectroscopy for ultra high performance concrete (UHPC is presented. Microstructure and chemical characterization were conducted for three phases of UHPC samples, including unmixed concrete ingredients (sample 1), cured concrete (sample 2), and pulverized concrete (sample 3). Rich contents of polycrystalline silica (quartz) were observed from all samples. Compressive loading frame tests were conducted using sample 2 to determine the piezospectroscopy coefficient of quartz without special surface treatment. The global piezospectroscopy coefficient was measured at 3.47 cm‾¹/GPa, and the local piezospectroscopy coefficient varied between 1.62 and 9.10 cm‾¹/GPa due to the variation of local microstructure conditions. The pulverization method was developed, and the zero-stress state was determined at 460.50 cm‾¹. The global absolute stress equation is presented using the global piezospectroscopy coefficient and the zero-stress state.

Supplemental Notes:

This paper was sponsored by TRB committee AFN10 Standing Committee on Basic Research and Emerging Technologies Related to Concrete.

Report/Paper Numbers:

19-00976

Language:

English

Corporate Authors:

Transportation Research Board

Authors:

Eslami, Elham
Zhou, Le
Yun, Hae-Bum

Pagination:

12p

Publication Date:

2019

Conference:

Transportation Research Board 98th Annual Meeting

Location: Washington DC, United States
Date: 2019-1-13 to 2019-1-17
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; Photos; References; Tables

Subject Areas:

Highways; Materials; Pavements

Source Data:

Transportation Research Board Annual Meeting 2019 Paper #19-00976

Files:

TRIS, TRB, ATRI

Created Date:

Dec 7 2018 9:52AM