International Building Lime Symposium 2005 Orlando, Florida, March 9 -11, 2005 POZZOLANIC MATERIALS – EVOLUTION OF MECHANICAL PROPERTIES ∗ A. L. Velosa 1 and M. R. Veiga 2 Abstract Natural pozzolans from different origins were characterised and used to make lime-pozzolan mortars. Mortars with these materials have been used since ancient times and the knowledge of their properties contributes toward understanding their performance as renders. A special emphasis was put on the evolution of their mechanical properties through a period of time up to 3 years, resulting in varied patterns depending on the proportion of materials and curing conditions. However, in a general sense, mechanical properties decreased with age, a finding that must be complemented by other analysis techniques, such as SEM, in order to evaluate the micro-structural changes in mortars that induce this phenomenon. Keywords Pozzolans, lime, mortar, mechanical properties. ∗ © Copyright NLA Building Lime Group 2005 The views presented in this paper are solely those of the authors. The National Lime Association (NLA) and the Building Lime Group assume no liability or responsibility for any errors, omissions, or other limitations in this paper or for any products, services, or methods presented. This paper is intended for use by professional personnel competent to evaluate the significance and limitations of the information provided and who will accept full responsibility for the application of this information. NLA and the Building Lime Group do not intend to infringe on any patent or other intellectual property right or induce any other party to do so, and thus users of this document are responsible for determining whether any method, technique, or technology described herein is protected by patent or other legal restriction. 1 Universidade de Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal, [email protected] 2 Laboratório Nacional de Engenharia Civil, Avenida do Brasil, 101, 1700-066 Lisboa, Portugal, [email protected]
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