Review of the New Zealand Standard for Concrete Structures (NZS 3101) for High Strength and Lightweight Concrete Exposed to Fire (1999)
Type of ContentReports
PublisherUniversity of Canterbury. Civil Engineering
This report describes the thermal properties, strength, and elastic modulus of lightweight, normal, and high strength concrete at elevated temperatures. Section 6 (Design for Fire Resistance) of the New Zealand standard for concrete structure (NZS3101, 1995) provides recommended values and minimum requirements for concrete at elevated temperatures. These values will be reviewed with respect to overseas standards and experimental data to find their applicability to lightweight and high strength concretes. A series of tests were performed on 1m x 1m lightweight and high strength concrete specimens to determine their insulation fire resistance. The specimens were produced in three thicknesses; 60, 130, and 175mm. This follows the method of earlier tests by Wade et al. (1991) and Wade (1992) on New Zealand aggregate concretes. It was determined that the strength reduction curve given by NZS3101 over-predicts the strength of high strength concrete at elevated temperatures, though the values for elastic modulus and insulation fire resistance can be applied to high strength concrete. The insulation fire resistance, strength, and elastic modulus values given by NZS3101 were found to also apply to lightweight concrete. The report recommends a change to the elastic modulus curve given in NZS3101. The purpose of this is to give consistency between the strength and elastic modulus curves, which do not currently reach zero at the same temperature.
RightsCopyright Michael Inwood
Showing items related by title, author, creator and subject.
Soleymani Ashtiani, Mohammad (University of Canterbury. Civil and Natural Resources Engineering, 2013)Self-compacting concrete (SCC) was first developed in Japan about two decades ago. Since then, it has been offered as a solution to various challenges inherently associated with traditional concrete construction; i.e. ...
Wilson, D. M. (University of Canterbury. Engineering, 1949)With the present day advance of building science, concrete engineers are beginning to look into the possibilities of making lightweight concrete particularly from lightweight aggregate. There are many reasons for this, the ...
Wang, Guoqiang (Grant) (University of Canterbury, 2006)A number of researchers have focused on the performance of reinforced concrete slabs exposed to fire. These studies have shown that the membrane forces and the redistribution of bending moments in the slabs considerably ...