EFFECT OF BET SURFACE AREA AND REPLACEMENT RATIO OF VOLCANIC GLASS POWDER ON COMPRESSIVE STRENGTH

Abstract

Volcanic glass powder （VGP） is manufactured from pyroclastic flow deposits. This paper reports the effect of BET surface area and replacement ratio of VGP as a supplementary cementitious material on compressive strength. The performance of VGP as a SCM was evaluated by conducting tests on mortar mixture, replacing 0％ to 30％ by weight of Portland cement by VGP with 0.3 water to binder ratio. VGP mortar with BET surface area of 15m²/g showed better results of 7-, 28-and 91-day compressive strength compared to control mortar in all replacement ratio. In particular, VGP demonstrated better strength development in mortar from 28-day to 91 day when replacing 25％ and 30％ by mass of Portland cement.