TY - JOUR
T1 - Comparative evaluation of thermal properties, tensile strain capacity and thermal cracking of concrete containing fly ash and slag
AU - Dabarera, Arosha
AU - Saengsoy, Warangkana
AU - Kaewmanee, Krittiya
AU - Nakazaki, Takeshi
AU - Lerdsupavaree, Thanapatch
AU - Tangtermsirikul, Somnuk
N1 - Funding Information:
The authors would like to acknowledge the Centre of Excellence in Material Science, Construction and Maintenance Technology, Thammasat University, Thailand and Taiheiyo Cement Corporation, Japan for the support and funding for this project.
Publisher Copyright:
© 2019, Prince of Songkla University. All rights reserved.
PY - 2019/9/1
Y1 - 2019/9/1
N2 - Fly ash and slag are two SCM’s utilized widely as partial replacements of cement in mass concrete. Different chemical, physical properties and reaction behavior cause fly ash-cement blend to differ from slag-cement blend in terms of thermal properties and thermal cracking in mass concrete. In this study, the time-dependent behavior of specific heat, thermal conductivity, and coefficient of thermal expansion (CTE) of hardening cement pastes containing fly ash and slag are comparatively investigated. Time-dependent models are proposed with satisfactory fit to the test results. A detailed comparison is done using finite element analysis of a mass concrete sample to evaluate thermal cracking potential, by comparing the predicted maximum restrained strain to the tested tensile strain capacity. The results indicate that fly ash performs better with lesser thermal cracking potential than slag in concrete mixes designed for similar long-term strengths.
AB - Fly ash and slag are two SCM’s utilized widely as partial replacements of cement in mass concrete. Different chemical, physical properties and reaction behavior cause fly ash-cement blend to differ from slag-cement blend in terms of thermal properties and thermal cracking in mass concrete. In this study, the time-dependent behavior of specific heat, thermal conductivity, and coefficient of thermal expansion (CTE) of hardening cement pastes containing fly ash and slag are comparatively investigated. Time-dependent models are proposed with satisfactory fit to the test results. A detailed comparison is done using finite element analysis of a mass concrete sample to evaluate thermal cracking potential, by comparing the predicted maximum restrained strain to the tested tensile strain capacity. The results indicate that fly ash performs better with lesser thermal cracking potential than slag in concrete mixes designed for similar long-term strengths.
KW - Fly ash
KW - Mass concrete
KW - Slag
KW - Thermal cracking
KW - Thermal properties
UR - http://www.scopus.com/inward/record.url?scp=85075305873&partnerID=8YFLogxK
U2 - 10.14456/sjst-psu.2019.149
DO - 10.14456/sjst-psu.2019.149
M3 - Article
AN - SCOPUS:85075305873
SN - 0125-3395
VL - 41
SP - 1184
EP - 1191
JO - Songklanakarin Journal of Science and Technology
JF - Songklanakarin Journal of Science and Technology
IS - 5
ER -