Applicability of Freeze-Thaw Resistance Testing Methods for High Strength Concrete at Extreme −52.5 °C and Standard −18 °C Testing Conditions
Case Studies in Construction Materials 2018
Ģirts Būmanis, Laura Spure, Aleksandrs Korjakins, Diāna Bajāre

In the present paper an attempt was made to evaluate reliability and efficiency of two freeze-thaw testing methods by testing high strength concrete (HSC) with two different supplementary cementitious materials as a partial substitute to cement in binary blend. Silica fume (SF) or metakaolin containing by-product (MKW) was used replacing with them 5, 10 or 15 wt% of cement. The freeze-thaw resistance of HSC samples saturated with 5% NaCl solution was tested at standard −18 °C and extreme −52.5 °C testing conditions. HSC series with SF exhibited higher initial strength, while poor resistance against freeze-thaw cycles was observed. Strength loss from 8 to 25% was observed after 12 freeze-thaw cycles at −52.5 °C, while 15 cycles reduced the strength by 30 to 53%, which was similar to 110 or 150 freeze-thaw cycles at −18 °C. Hence, it was concluded that extreme low temperature testing can significantly reduce the time, which is necessary for evaluating freeze-thaw durability of HSC. HSC without air entraining additives with W/C ranging from 0.38 to 0.45 proved to be vulnerable to freeze-thaw exposure as its water absorption gradually increased. Ultrasonic pulse velocity measurements during freeze-thaw tests allowed to determine indirectly the strength loss and good correlation between the two was observed.


Atslēgas vārdi
Freeze-thaw resistance, High strength concrete, Ultrasonic pulse velocity
DOI
10.1016/j.cscm.2018.01.003
Hipersaite
https://www.sciencedirect.com/science/article/pii/S2214509517302504?via%3Dihub

Būmanis, Ģ., Dembovska, L., Korjakins, A., Bajāre, D. Applicability of Freeze-Thaw Resistance Testing Methods for High Strength Concrete at Extreme −52.5 °C and Standard −18 °C Testing Conditions. Case Studies in Construction Materials, 2018, Vol. 8, No. 1, 139.-149.lpp. ISSN 2214-5095. Pieejams: doi:10.1016/j.cscm.2018.01.003

Publikācijas valoda
English (en)
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