guidelines, or every five years. Deficiencies in equipment are to be brought up to standard. Hazards should be corrected immediately and other deficiencies corrected within 21 days” (The College of Opticians of Ontario, 2006). WHMIS Workplace Hazard Material Information System sets safety guidelines not just for Opticians, but as well as all Health Care Practitioners and in general, every workplace environment in Canada. A procedure and equipment manual must always be kept on site in the…
with a dental material that will be biocompatible with the tooth and resist the hostile oral environment. Dental materials are incorporated into the teeth structure by retention. This retention can accomplished through mechanical, chemical adhesion or bonding mechanisms between materials and the dental structure. Mechanical retention is used when amalgam is placed, by securing it through undercuts, so that the floor is wider than the opening of the preparation. Composite materials or dental…
fairly chemical resistant and does not rust compared to some metals. 4.0.4 Fibreglass Composites - This material combines the resilience, stiffness, flexibility and strength. The resulting material is very lightweight, fairly…
traditional metallic properties Introduction Carbon fibre is a material made up of thin strips of crystalline filaments of carbon woven together to create a cloth or combined with a resin or ceramics to strengthen the material. Carbon fibre is now overtaking traditional metals in where it is being used and the reasons why will be discussed further on in the report (Happian-Smith 2001: 1). Carbon fibre composites have become the leading material in the automotive, aerospace and sporting…
3 SHORE DUROMETER HARDNESS STRENGTH Hardness was defined as materials resisting property to prevent permanent indentation. Durometer is a measure of hardness in polymers, fibre and rubbers where it measures the indentation depth in the material. According to ASTM D2240 tests were conducted on specimen using Durometer in the room temperature [5]. The test is done on the surface by supplying load and measuring the indentation. The material under test must be a minimum of 6.4 mm thickness. It was…
dense tubules that help enhance toughness. They also have a high mineral content that is more densely packed to maintain structure for security and strength. Antlers Antlers are one of the most impact resistant and energy absorbent bio mineralized materials. They have very bony inter tubules that connect to the head…
its side, the tanker truck’s flammable material leaks out contaminating the median and the environment. With still the possibility of a fire, or worse an explosion, state patrol, Ohio department of transportation (DOT) officers, and other emergency personnel arrive on the scene, as traffic grinds to a halt. After surveying the situation, emergency officials state that, thankfully, this time the driver will be fine, and the hazmat spill of flammable material can be cleaned up; nevertheless, the…
Terrazzo, composites, and concrete are all materials that can be used in the interior of a space. In this paper, I am going to explain the similarities and differences between concrete and terrazzo, what each material is composed of, how these materials are used, and the different subcategories of each material. I’m also going to discuss how each material can be altered, in terms of the look and feel of it. Composite flooring is composed of aggregate and a binder, also known as the matrix. The…
CHARACTERISTICS Often materials are subject to forces (loads) when they are used. The mooring lines have to withstand the loads acting on the moored structure in addition to loads acting directly on the mooring components (Bjørnsen 2014). Mechanical engineers calculate those forces and material scientists how materials deform (elongate, compress, and twist) or break as a function of applied load, time, temperature, and other conditions (Virginia.edu 2013). 1.4.1. Tensile Load The mooring line…
Trusses have a high strength to weight ratio and consequently are used in many structures, from bridges, to roof supports, to space stations.The Pros of a Truss Bridge 1. They might be light, but they are also strong. Truss bridges utilize the materials that are needed to create them very effectively. This makes them very economical to build, but doesn’t compromise on the ground of the bridge. Because it uses small timbers, the…