Experimental study of the material and bond properties of frost-damaged concrete

Abstract

In an extensive experimental investigation, several types of tests were conducted on a reference specimen and frost-damaged concrete. Two levels of internal frost damage were quantified by the relative dynamic modulus of elasticity and compressive strength. Test results showed a significant influence of freeze-thaw cycles on the compressive strength and even more influence on the modulus of elasticity and the compressive strain at peak stress. Reduced tensile strength and increased fracture energy were measured. From inverse analysis of wedge splitting test results, a significant effect of frost on the shape of the tensile stresscrack opening relationship was observed: tensile strength was reduced, while the post-peak behaviour was more ductile for the frost-damaged concrete. Pull-out tests showed the influence of freeze-thaw cycles on bond strength and slip. The pull-out test results are compared with similar tests available in the literature and the effect of frost on bond behaviour is discussed.

Recent durability studies on concrete structure

“…Concrete deterioration caused by freezing and thawing is closely linked to the presence of water in concrete but cannot be explained simply by the expansion of water on freezing [88,89]. In general, the loss of mass or decrease of dynamic modulus is used as indexes of degradation.…”

Grundlagen und Entwicklung von stochastischen Modellen zur Beurteilung der Schädigung von Massivbrücken auf der Grundlage der Ergebnisse von Bauwerksüberprüfungen

“…Auswertung der Proben der Untersuchung der Frost-Tauwechselbeanspruchung in Hanjari [19] in Hinblick auf die Druckfestigkeit …”

Bond behavior between steel bar and recycled aggregate concrete after freeze–thaw cycles

“…On the basis of the relevant literature, a lot of research has been carried out on the bond strength between steel bar and recycled aggregate concrete (An et al, 2010;Hanjari et al, 2011;Kim and Yun, 2014;Weiwei, 2007), while there were no published data in the literature concerning the bond behavior between steel bar and recycled aggregate concrete after the action of freeze-thaw cycles. So, the bond behavior between steel bar (plain steel bar with diameter 12 mm, deformed steel bar with diameter 14 mm, 18 mm, and 22 mm) and recycled aggregate concrete (the replacement percentages of coarse aggregate was 30%) after 0, 15, 25, 50, 75 cycles of freeze-thaw was studied in Cold Regions Science and Technology 118 (2015) 38-44 this paper.…”