Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Mechanical properties and thermal conductivity of reactive powder concrete materials
Reactive Powder Concrete (RPC) is a cement-based material, which behaves like a low- porosity ceramic material with excellent mechanical performance. This work was aimed to study soft-cast RPCs, in particular, their mechanical performance and thermal conductivity. The time development of compressive strength, tensile strength and elas tilc modulus was monitored for RPC prepared by varying the waten to cement ratio from 0.20 to 0.32. Silica fume, steel fibers and acrylic-based superplasticiser were employed to prepare the RPC mixtures. Optimum workability and mechanical performance were gained when a water to cement ratio of 0.24 was adopted. In particular, 28-day compressive strength of 156 MPa, tensile strength of 38 MPa and tangent elastic modulus of about 140 GPa characterized the RPC. Moreover, thermal conductivity was determined for the same RPC, in the presence and in the absence of steel fibers. The scope was to evaluate the effect of steel fibers on the thermal conductivity coeffcient, in order to predict the RPC ability of heat draining off. This information could be essential for the possible fields of application such as in mechanical engineering, where RPC materials can be employed as high abrasion-resistant dies in the molding process of metal and polymer products.
Mechanical properties and thermal conductivity of reactive powder concrete materials
Reactive Powder Concrete (RPC) is a cement-based material, which behaves like a low- porosity ceramic material with excellent mechanical performance. This work was aimed to study soft-cast RPCs, in particular, their mechanical performance and thermal conductivity. The time development of compressive strength, tensile strength and elas tilc modulus was monitored for RPC prepared by varying the waten to cement ratio from 0.20 to 0.32. Silica fume, steel fibers and acrylic-based superplasticiser were employed to prepare the RPC mixtures. Optimum workability and mechanical performance were gained when a water to cement ratio of 0.24 was adopted. In particular, 28-day compressive strength of 156 MPa, tensile strength of 38 MPa and tangent elastic modulus of about 140 GPa characterized the RPC. Moreover, thermal conductivity was determined for the same RPC, in the presence and in the absence of steel fibers. The scope was to evaluate the effect of steel fibers on the thermal conductivity coeffcient, in order to predict the RPC ability of heat draining off. This information could be essential for the possible fields of application such as in mechanical engineering, where RPC materials can be employed as high abrasion-resistant dies in the molding process of metal and polymer products.
Mechanical properties and thermal conductivity of reactive powder concrete materials
Corinaldesi, V. (Autor:in) / Moriconi, G. (Autor:in)
2003
8 Seiten, 6 Bilder, 3 Tabellen, 3 Quellen
Aufsatz (Konferenz)
Englisch
Ultrahochleistungsbeton , mechanische Eigenschaft , Wärmeleitfähigkeit , Druckfestigkeit , Zugfestigkeit , Elastizitätsmodul , Mikrosilica , Stahlfaser , Superplastifizierer , Wasser-Zement-Wert , Verarbeitbarkeit , Wechselbeziehung , Spannungs-Dehnungs-Verhalten , Werkstoffeigenschaft , Ultrahochfestigkeit
MECHANICAL PROPERTIES AND THERMAL CONDUCTIVITY OF REACTIVE POWDER CONCRETE MATERIALS
| British Library Conference Proceedings | 2003
Mechanical Properties of Modified Reactive Powder Concrete
| British Library Conference Proceedings | 1997
Mechanical properties of modified reactive powder concrete
| Tema Archiv | 1997
Thermal conductivity and mechanical properties of porous concrete materials
| British Library Online Contents | 2017