High-performance light-weight concrete: material and sectional properties during and after a fire

Title: High-performance light-weight concrete: material and sectional properties during and after a fire
Author(s): R. Felicetti, P.G. Gambarova
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: 89 - 99
Total Pages: 11
Nb references: 11
Language: English

Abstract: 
High-Performance Light-Weight Aggregate Concrete (HPLWC, fc = 60-70 MPa, rc @ 1900 kg/m3) has been recently used in several outstanding structures (like tension-leg platforms and segmental bridges), where the self-weight reduction and the durability under extreme environmental conditions control the design. With reference to fire conditions and to a typical high-performance light-weight cementitious composite, a research project has been recently launched at Milan University of Technology, with three objectives: (a) to evaluate the thermal diffusivity of the material up to 750°C; (b) to assess the material decay at high temperature and after cooling; and (c) to compare the ultimate capacity of geometrically-identical R/C sections made of HPLWC, LWC and NSC. Three concrete mixes (target strength fc = 30, 40 and 60 MPa), five temperature levels (20, 105, 250, 500 and 750°C), one thermal state (after cooling), three nominally-identical tests for each case have been considered, bringing the total number of the specimens to 45. HPLWC has the lowest thermal diffusivity, followed by LWC and NSC. As for the behavior of the R/C sections, HPLWC is more affected by fire duration than NSC and LWC, with particular reference to the bending capacity and to the extension of the ultimate M-N envelopes.

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