There are few studies on the early-age performance of high-strength cold weather concretes and their shear strength interaction in cold weather. Shear strength characteristics of high-strength cold weather concrete in subfreezing temperatures is the topic of this paper. Tests were conducted on cylinders and l-shaped push-off specimensto determine the early-age shear interlock and shear frictional resistance between high-strength regular portland cement concrete and cold weather high-strength concretes in the rehabilitation of bridge decks and other infrastructure systems. Results validate previous findings on polymer-modified concretes: the american concrete institute code limits on the shear-friction strength are too conservative even at early ages of high-strength cold weather concretes and need tobe modified. This paper appears in transportation research board record no. 1284, Cement, admixtures, and concrete 1990.
Samenvatting