A research on the advanced construction materials has given a push by many factors. In late eighty's, the aerospace industry has seen a steady decline; alternative use of new materials develop for aerospace industry is made possible to construction sector. Exotic materials such as advance polymers & high performance carbon fibre sheeting are researched upon to develop their potential use in the construction of the corrosion free buildings.
The advanced materials are looking on as next generation materials for high techbuildings. Materials that has been researched not only enhances the durability of buildings, but they also have ability to reduce the manpower usage, reduce or eliminating corrosion, and enhancing strength of the structural members. One of new materials which is being rapidly developed & applied is the use of continuous fibres in the construction. Continuous fibres are widely used in the retrofitting and strengthening type of works. Fibres could be impregnat in the resin at factory to produce stiff fibre reinforce polymer plate or they could be soaked in a resin just prior to application at site. Fibre Reinforce Polymer (FRP) utilises the high performance fibres such as the carbon aramid, kevlar and the other glass fibres encapsulated in the resin matrix. This technology has been developed to an alternative to the conventional steel reinforcement for using in the concrete structure primarily for avoiding the corrosion problems associated with the steel.Now, Fibre Reinforce Polymer can be used to increase or enhance flexural & shear strength of the slabs, Columns, Joints and the Slabs.
i need more detailed notes on advanced construction materials...
A research on the advanced construction materials has given a push by many factors. In late eighty's, the aerospace industry has seen a steady decline; alternative use of new materials develop for aerospace industry is made possible to construction sector.
Micro silica is an amorphous type of silica dust mostly collected in bag house filters as by-product of the silicon and ferro-silicon production. The paper summarizes important physical and chemical properties of micro silica and uses those results for an evaluation of micro silica from a Health Safety and Environment (HSE) standpoint. Micro silica consists of spherical particles with an average particle size of 150 nm and a specific surface area of typically 20 m3/g. The chemical and physical properties of this inorganic product are different as compared to other amorphous and crystalline silica poly morphs. More than 500.000 MT of micro silica are sold to the building industry world-wide and are used in fibre cement, concrete, oil-well drilling, refractories, and even in polymers.
Micro silica contains trace amounts of heavy metal oxides and organic deposits, which originate from natural raw materials. Since the concentration of these impurities is very low, micro silica complies with company policies and international regulations. Traces of crystalline silica in micro silica do not seem to represent a health risk, neither for silicosis nor for lung cancer, due to the low levels and the large particle size. According to the International Agency for Research on Cancer (IARC), there is insufficient evidence for the carcinogenicity of silica fume, in contrast to crystalline silica. In order to assess potential health risks of micro silica and compliance with international regulations from an occupational hygienist’s point of view, one has to collect fragments of information from different analytical techniques. Putting these fragments together results in a cohesive picture. All evidences indicate that micro silica is not a hazardous product when applied as advised.