TY - GEN
T1 - Crack resistance and durability-related properties of internally cured high-strength / high-performance concrete
AU - Kovler, Konstantin
AU - Zhutovsky, Semion
PY - 2012
Y1 - 2012
N2 - Internal curing technology has been developing to counteract autogenous shrinkage of High-Strength (HSC)/High-Performance (HPC) Concrete. However, by introducing weak porous material as the internal water reservoirs, strength and durability properties can be downgraded. On the other hand, cracking due to autogenous shrinkage has extensively detrimental effect on concrete durability. Thus, when durability of HSC/HPC is considered, transport properties have to be viewed in the bundle with the risk of cracking. Research on durability of internally cured concretes in general, and durability of internally cured concretes with very low water to cement ratios in particular, attracts much interest, since very little information is available in the literature in this regard. The paper reviews the existing publications in the topic. The cracking sensitivity of concrete made at water to cement ratios of 0.21 to 0.33 and internally cured by means of water-saturated lightweight aggregate of volcanic origin (pumice) was studied in this research. In parallel, resistance to chloride penetration, air permeability and sorptivity of the same concrete mixes was tested. The experimental results demonstrate that internal curing efficiency in reducing cracking sensitivity of concrete increases with the reduction of water/cement ratio, while transport-related properties of concrete are improved, or at least as good as, those of the reference concrete.
AB - Internal curing technology has been developing to counteract autogenous shrinkage of High-Strength (HSC)/High-Performance (HPC) Concrete. However, by introducing weak porous material as the internal water reservoirs, strength and durability properties can be downgraded. On the other hand, cracking due to autogenous shrinkage has extensively detrimental effect on concrete durability. Thus, when durability of HSC/HPC is considered, transport properties have to be viewed in the bundle with the risk of cracking. Research on durability of internally cured concretes in general, and durability of internally cured concretes with very low water to cement ratios in particular, attracts much interest, since very little information is available in the literature in this regard. The paper reviews the existing publications in the topic. The cracking sensitivity of concrete made at water to cement ratios of 0.21 to 0.33 and internally cured by means of water-saturated lightweight aggregate of volcanic origin (pumice) was studied in this research. In parallel, resistance to chloride penetration, air permeability and sorptivity of the same concrete mixes was tested. The experimental results demonstrate that internal curing efficiency in reducing cracking sensitivity of concrete increases with the reduction of water/cement ratio, while transport-related properties of concrete are improved, or at least as good as, those of the reference concrete.
UR - http://www.scopus.com/inward/record.url?scp=84905270400&partnerID=8YFLogxK
M3 - منشور من مؤتمر
SN - 9781909131040
T3 - Proceedings of the 3rd International Conference on the Durability of Concrete Structures, ICDCS 2012
BT - Proceedings of the 3rd International Conference on the Durability of Concrete Structures, ICDCS 2012
T2 - 3rd International Conference on the Durability of Concrete Structures, ICDCS 2012
Y2 - 17 September 2012 through 19 September 2012
ER -
