GROUP 4C
PROBLEM REPORT
ASCAS
Natural materials are generally lower in embodied energy and toxicity than man-made materials. They require less processing and are less damaging to the environment. Stone Stone is a highly durable, low maintenance building material with high thermal mass. It is versatile, available in many shapes, sizes, colours and textures, and can be used for floors, walls, arches and roofs. Stone blends well with the natural landscape, and can easily be recycled for other building purposes. Lime It absorbs carbon dioxide from the atmosphere and then forms a strong yet permeable coat of limestone. Also, it is resilience, durability, and water resistant. Natural Fibers It undertakes as reinforcing components owing to their fast growth, high mechanical strength, low density, carbon sequestration, biodegradability and low energy consumption. Bamboo is excellent for the environment, due to its ability to form microclimates and its incredible absorption of carbon dioxide. As well as being highly renewable, the embodied energy in bamboo can be reduced to zero. Wood It has low embodied energy, which can slow harmful effects of industrial production. Earth Plaster It is one of the most enjoyable natural materials to work with. When mixed and applied properly, wall covering will be hard, durable, and beautiful. Also, one of advantages of using earth plaster is that the color of the plaster itself can eliminate the need for any paint. This is good for the environment and can reduce construction costs. Table for the comparison of types of coatings
CITY UNIVERSITY OF HONG KONG 2012
Recycling Materials: Key building materials that have potential for recycling. These generally make up the bulk of a building’s fabric. The manufacturing process for all of these materials can easily incorporate waste products. Glass, plastics, and metal It can be reformed through heat. Concrete or brick It can be ground up and used as aggregate in new masonry. Lumber It can be used as dimensional lumber, or chipped for use in composite materials such as strand board. Glass and Glazing Materials Argon Gas Originally, the space was filled with air or flushed with dry nitrogen just prior to sealing. In a sealed glass insulating unit, air currents between the two panes of glazing carry heat to the top of the unit and settle into cold pools at the bottom. Filling the space with a less conductive, more viscous, or slow-moving gas minimizes the convection currents within the space, conduction through the gas is reduced, and the overall transfer of heat between the inside and outside is reduced. Tinted Glass It refers to any glass that has been treated with a material such as a film or coating that reduces the transmission of light through it. Glass can be tinted with various types of coating, which block and/or reflect different amounts and types of light, according to the needs and preferences of the consumer. Tinted glass is also used in commercial buildings to keep the inside cooler, and it has the added benefit of giving the outside of a building a more uniform, aesthetically pleasing appearance. Metal Coating Metal coating is necessary to provide various degrees of protection, ranging from hot-dipped and electroplated process to tough polymers and flame-sprayed ceramics. It aims To block long wave radiation and let in short wave radiation.