Study on strength development of concrete with Portland blast-furnace slag cement under sealed curing conditions in cold regions

Title: Study on strength development of concrete with Portland blast-furnace slag cement under sealed curing conditions in cold regions
Author(s): Ichiro Iwaki
Paper category : conference
Book title: 2nd International RILEM Symposium on Advances in Concrete through Science and Engineering
Editor(s): J. Marchand, B. Bissonnette, R. Gagné, M. Jolin and F. Paradis
Print-ISBN: 2-35158-003-6
e-ISBN: 2351580028
Publisher: RILEM Publications SARL
Publication year: 2006
Nb references: 6
Language: English

Abstract: It is known that the strength development of concrete using portland blast-furnace slag cement is remarkably delayed especially at low temperatures. Thus, it is important to prevent the water evaporation from concrete during curing. As a method of solving this problem, the author has suggested that it is desirable to keep this type of concrete continuously sealed as long as possible after placing. This research aims at investigating the strength development of concrete using portland blast-furnace slag cement (GGBFS concrete) under sealed curing conditions in cold regions. In this research, sealed-cured GGBFS concrete specimens with different water-cementitions materials ratio were exposed to various temperature conditions in laboratory and the compressive strength was measured at early and later ages. The same experiment was performed by concrete using ordinaly portland cement (OPC concrete) for comparison. From the experimental results, the strength development of GGBFS concrete associated with mixture proportions and curing temperatures was investigated. Next, the strength development of air-cured and sealed-cured GGBFS concrete was researched by outdoor exposure test during summer and winter. Based on these experimental results, the strength development of GGBFS concrete for all experimental conditions was evaluated by the commonly used equation of maturity. Finally, the influence of temperature on strength developemnt of sealed-cured GGBFS concrete was discussed by introducing a modified equation of maturity and strength-maturity relationship of GGBFS concrete.

Online publication: 2006-08-02
Classification: 3.2 Theme 2: From Fresh to Hardened Concrete
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2351580028.065