PPT-Abrasiveness

noun from Latin 1 texture of any material or substance used for grinding polishing etc as emery pumice or sandpaper 2 tending to annoy or cause ill will overly aggressive The abrasiveness of her personality was so rough that everyone avoided her. Department of Geotechnics and Transportation Faculty of Civil Engineering Universiti Teknologi Malaysi a Skudai Johor edyutmmy Rosli Saad Senior Lecturer Dr School of Physics Universiti Sains Malaysia Penang Malaysia rosliusmmy Nor Nazrin Binti H Nilsen Norwegian University of Science and Technology F Dahl SINTEF Rock and Soil Mechanics J Holzhuser Smoltczyk Partner GmbH P Raleigh Jacobs Associates INTRODUCTION Tunnel excavation using tunnel boring machines TBMs has become increas ingly com noun from Latin. 1. texture of any material or substance used for grinding, polishing, etc., as emery, pumice, or sandpaper. 2. tending to annoy or cause ill will; overly aggressive: The abrasiveness of her personality was so rough that everyone avoided her.. Not all toothpastes are created equal. Some can even cause problems. Many types of toothpaste are highly abrasive and actually strip away tooth enamel which never grows back. The teeth may become 720 www.williamsonperio.com 512.346.2782 Toothpaste Abrasiveness Ranked by RDA (Relative Dentin Abrasion) Value *The date from this chart was compiled from various sources including independent resea 164 JOURNAL OF COSMETIC SCIENCE Kinoshita et al. (4) examined several dentifrices by the methods of surface analyzer and scanning electron microscopy. Among the several abrasives (CaHPO 4