Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Mechanical properties of modified reactive powder concrete
Original Reactive Powder Concrete (RPC) - in form of a superplasticized cement mixture with silica fume, steel fibers and ground fine quartz (150 micron to 400 micron) - was studied in comparison with a modified RPC where a graded natural aggregate (max size 8 mm) was used to replace the fine sand and/or part of the cementitious binder. Original and modified RPC were manufactured at a plastic-fluid consistency, cast by vibration and cured at three different conditions: room temperature; steam-curing at 90 deg C; high pressure steam-curing at 160 deg C. The addition of the graded aggregate does not reduce the compressive strength provided that the quality of the cement matrix, in terms of its water-cement ratio, is not changed. This result is in contrast with the model proposed to relate the high compressive strength level of RPC (200 MPa) to the absence of coarse aggregate. Both the original and modified RPC (with the coarse aggregate addition) perform better - in terms of higher strength and lower drying shrinkage or creep strain - when they are steam cured rather than cured at room temperature. This improvement was related to a more dense microstructure of the cement matrix, particularly in the RPC specimens steam cured at 160 deg C.
Mechanical properties of modified reactive powder concrete
Original Reactive Powder Concrete (RPC) - in form of a superplasticized cement mixture with silica fume, steel fibers and ground fine quartz (150 micron to 400 micron) - was studied in comparison with a modified RPC where a graded natural aggregate (max size 8 mm) was used to replace the fine sand and/or part of the cementitious binder. Original and modified RPC were manufactured at a plastic-fluid consistency, cast by vibration and cured at three different conditions: room temperature; steam-curing at 90 deg C; high pressure steam-curing at 160 deg C. The addition of the graded aggregate does not reduce the compressive strength provided that the quality of the cement matrix, in terms of its water-cement ratio, is not changed. This result is in contrast with the model proposed to relate the high compressive strength level of RPC (200 MPa) to the absence of coarse aggregate. Both the original and modified RPC (with the coarse aggregate addition) perform better - in terms of higher strength and lower drying shrinkage or creep strain - when they are steam cured rather than cured at room temperature. This improvement was related to a more dense microstructure of the cement matrix, particularly in the RPC specimens steam cured at 160 deg C.
Mechanical properties of modified reactive powder concrete
Collepardi, S. (Autor:in) / Coppola, L. (Autor:in) / Troli, R. (Autor:in) / Collepardi, M. (Autor:in)
1997
21 Seiten, 9 Bilder, 5 Tabellen, 6 Quellen
Aufsatz (Konferenz)
Englisch
Mechanical Properties of Modified Reactive Powder Concrete
| British Library Conference Proceedings | 1997
Mechanical Characteristics of Reactive Powder Concrete
| Springer Verlag | 2024
MODIFIED REACTIVE POWDER CONCRETE WITH ARTIFICIAL AGGREGATES
| British Library Conference Proceedings | 2000
Nano boron nitride modified reactive powder concrete
| British Library Online Contents | 2018