Mechanical properties and thermal conductivity of reactive powder concrete materials

Title: Volume 1 - Mechanical properties and thermal conductivity of reactive powder concrete materials
Author(s): V. Corinaldesi, G. Moriconi
Paper category : conference
Book title: International Conference on Advances in Concrete and Structures
Editor(s): Ying-shu Yuan, Surendra P. Shah and Heng-lin Lü
Print-ISBN: 2-912143-41-1
e-ISBN: 2351580176
Publisher: RILEM Publications SARL
Publication year: 2003
Pages: 766 - 773
Total Pages: 8
Nb references: 3
Language: English

Abstract: 
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 elastic modulus was monitored for RPC prepared by varying the water 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 coefficient, 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.

Online publication: 2003-08-10
Publication type : full_text
Public price (Euros): 0.00