A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Influence of curing methods on the formation of microcracks in high-strength concrete
The microstructure of concrete, especially of High Performance Concrete/ High Strength Concrete (HPC/HSC), usually shows many microcracks. The aim of this research project is to investigate the reasons for microcracking in HSC, especially the influence of different curing methods. Different specimens were stored at 20 deg C/65 % r.h., underwater, in a 40 deg C furnace and under40 deg C hot wind. Additionally, the HSC was made with and without silica fume to determine the effect on the structure and on the formation of microcracks. Compressive strength ofthe investigated concretes ranged from 80 -100 MPa. The main result is, that the wet curing led to a higher number of microcracks in HSC, than the curing at 20 deg C/65 % r.h. and also a higher number than the curing method in the furnace or under a hot wind. Additionally, the effects of microcracking on servicability and durability were investigated. The results showed thatthe number of microcracks did not influence mechanical properties like compressive strength and splitting tensile strength nor water permeability. Specimens with high number of microcracks showed in these tests also highervalues of Young's modulus.
Influence of curing methods on the formation of microcracks in high-strength concrete
The microstructure of concrete, especially of High Performance Concrete/ High Strength Concrete (HPC/HSC), usually shows many microcracks. The aim of this research project is to investigate the reasons for microcracking in HSC, especially the influence of different curing methods. Different specimens were stored at 20 deg C/65 % r.h., underwater, in a 40 deg C furnace and under40 deg C hot wind. Additionally, the HSC was made with and without silica fume to determine the effect on the structure and on the formation of microcracks. Compressive strength ofthe investigated concretes ranged from 80 -100 MPa. The main result is, that the wet curing led to a higher number of microcracks in HSC, than the curing at 20 deg C/65 % r.h. and also a higher number than the curing method in the furnace or under a hot wind. Additionally, the effects of microcracking on servicability and durability were investigated. The results showed thatthe number of microcracks did not influence mechanical properties like compressive strength and splitting tensile strength nor water permeability. Specimens with high number of microcracks showed in these tests also highervalues of Young's modulus.
Influence of curing methods on the formation of microcracks in high-strength concrete
Einfluss von Aushärtemethoden auf die Bildung von Mikrorissen in hochfestem Beton
Kustermann, A. (author) / Thienel, K.C. (author) / Keuser, M. (author)
2005
13 Seiten, 10 Bilder, 4 Tabellen, 4 Quellen
Conference paper
English
SP-228-82: Influence of Curing Methods on the Formation of Microcracks in High-Strength Concrete
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