Use of Perlite as a Pozzolanic Addition in Lime Mortars

Year 2010, Volume: 23 Issue: 3, 305 - 313, 06.07.2010

Ülger Bulut

Abstract

The consciousness of a sustainable construction process requires awareness about production of construction materials. Considering the high cost and the negative environmental effects of cement, which is widely used in contemporary building construction, it becomes clear that there is a need in research of alternative binding materials. Pozzolanic lime mortars, which are among the oldest construction materials, have gradually been used less and less due to their long term strength development although they have high durability.

Since there is plenty of perlite reserves of in Turkey, it is necessary to research the possibilities of using it in the field of construction materials. The aim of this study is to invent a hydraulic cementitious material which is not soluble in water and which has efficient strength.

As result, the utilization of perlite as a pozzolanic activity in lime mortars ensures the strength requirements. But perlite-lime mortar did not show enough strength against freezing due to its high water absorption, since the number of open pores it contains is more than the closed ones. So, perlite-lime mortar can be successfully applied in historical buildings instead of classical lime mortars. On the other hand, mechanical properties of perlite-lime mortar are sufficient as an inner partition bricks.

Keywords: Pozzolanic activity, perlite, lime mortar.

 

Keywords

Pozzolanic activity, perlite, lime mortar

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