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Title: Multiscale characterization of chemical–mechanical interactions between polymer fibers and cementitious matrix

Abstract

Together with a series of mechanical tests, the interactions and potential bonding between polymeric fibers and cementitious materials were studied using scanning transmission X-ray microscopy (STXM) and microtomography (lCT). Experimental results showed that these techniques have great potential to characterize the polymer fiber-hydrated cement-paste matrix interface, as well as differentiating the chemistry of the two components of a bi-polymer (hybrid) fiber the polypropylene core and the ethylene acrylic acid copolymer sheath. Similarly, chemical interactions between the hybrid fiber and the cement hydration products were observed, indicating the chemical bonding between the sheath and the hardened cement paste matrix. Microtomography allowed visualization of the performance of the samples, and the distribution and orientation of the two types of fiber in mortar. Beam flexure tests confirmed improved tensile strength of mixes containing hybrid fibers, and expansion bar tests showed similar reductions in expansion for the polypropylene and hybrid fiber mortar bars.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
Advanced Light Source Division
OSTI Identifier:
1131030
Report Number(s):
LBNL-6628E
Journal ID: ISSN 0958-9465
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Journal Article
Journal Name:
Cement and Concrete Composites
Additional Journal Information:
Journal Volume: 48; Journal Issue: C; Related Information: Journal Publication Date: April 2014; Journal ID: ISSN 0958-9465
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 36 MATERIALS SCIENCE; Reinforcing concrete fiber STXM lCT Hybrid fiber NEXAFS

Citation Formats

Hernández-Cruz, Daniel, Hargis, Craig W., Bae, Sungchul, Itty, Pierre A., Meral, Cagla, Dominowski, Jolee, Radler, Michael J., Kilcoyne, David A., and Monteiro, Paulo J. M. Multiscale characterization of chemical–mechanical interactions between polymer fibers and cementitious matrix. United States: N. p., 2014. Web. doi:10.1016/j.cemconcomp.2014.01.001.
Hernández-Cruz, Daniel, Hargis, Craig W., Bae, Sungchul, Itty, Pierre A., Meral, Cagla, Dominowski, Jolee, Radler, Michael J., Kilcoyne, David A., & Monteiro, Paulo J. M. Multiscale characterization of chemical–mechanical interactions between polymer fibers and cementitious matrix. United States. https://doi.org/10.1016/j.cemconcomp.2014.01.001
Hernández-Cruz, Daniel, Hargis, Craig W., Bae, Sungchul, Itty, Pierre A., Meral, Cagla, Dominowski, Jolee, Radler, Michael J., Kilcoyne, David A., and Monteiro, Paulo J. M. 2014. "Multiscale characterization of chemical–mechanical interactions between polymer fibers and cementitious matrix". United States. https://doi.org/10.1016/j.cemconcomp.2014.01.001. https://www.osti.gov/servlets/purl/1131030.
@article{osti_1131030,
title = {Multiscale characterization of chemical–mechanical interactions between polymer fibers and cementitious matrix},
author = {Hernández-Cruz, Daniel and Hargis, Craig W. and Bae, Sungchul and Itty, Pierre A. and Meral, Cagla and Dominowski, Jolee and Radler, Michael J. and Kilcoyne, David A. and Monteiro, Paulo J. M.},
abstractNote = {Together with a series of mechanical tests, the interactions and potential bonding between polymeric fibers and cementitious materials were studied using scanning transmission X-ray microscopy (STXM) and microtomography (lCT). Experimental results showed that these techniques have great potential to characterize the polymer fiber-hydrated cement-paste matrix interface, as well as differentiating the chemistry of the two components of a bi-polymer (hybrid) fiber the polypropylene core and the ethylene acrylic acid copolymer sheath. Similarly, chemical interactions between the hybrid fiber and the cement hydration products were observed, indicating the chemical bonding between the sheath and the hardened cement paste matrix. Microtomography allowed visualization of the performance of the samples, and the distribution and orientation of the two types of fiber in mortar. Beam flexure tests confirmed improved tensile strength of mixes containing hybrid fibers, and expansion bar tests showed similar reductions in expansion for the polypropylene and hybrid fiber mortar bars.},
doi = {10.1016/j.cemconcomp.2014.01.001},
url = {https://www.osti.gov/biblio/1131030}, journal = {Cement and Concrete Composites},
issn = {0958-9465},
number = C,
volume = 48,
place = {United States},
year = {Tue Apr 01 00:00:00 EDT 2014},
month = {Tue Apr 01 00:00:00 EDT 2014}
}