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A platform for research: civil engineering, architecture and urbanism
Engineers, about fifty years ago, stumbled upon the problem of the bonding between cement paste and aggregates, now known as the interfacial transition zone, which, to date, is regarded as the strength determining weak link in the structure of ordinary concrete. The interfacial transition zone is part of the hydrated cement paste. Its microstructural characteristics within a plain Portland cement concrete are a high porosity, long ettringite needles and a high amount of relatively large calcium hydroxide crystals. From these characteristics it is considered to be the preferred path for the propagation of cracks in concrete. Furthermore, the high porosity has an important influence on the transport properties of concrete, and as a consequence, on durability.
Engineers, about fifty years ago, stumbled upon the problem of the bonding between cement paste and aggregates, now known as the interfacial transition zone, which, to date, is regarded as the strength determining weak link in the structure of ordinary concrete. The interfacial transition zone is part of the hydrated cement paste. Its microstructural characteristics within a plain Portland cement concrete are a high porosity, long ettringite needles and a high amount of relatively large calcium hydroxide crystals. From these characteristics it is considered to be the preferred path for the propagation of cracks in concrete. Furthermore, the high porosity has an important influence on the transport properties of concrete, and as a consequence, on durability.
Syneresis in Cement Paste Systems
M. R. de Rooij (author)
2000
100 pages
Report
No indication
English
Construction Equipment, Materials, & Supplies , Construction Materials, Components, & Equipment , Cements , Concrete , Crack-propagation , Aggregates , Transport properties , Durability , Tensile strength , Admixtures , Crystals , Porosity , Microstructures , Theses , Foreign technology , Cement paste
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