Glass Fibre Reinforced Concrete Use in Construction Eng
Glass-fibre reinforced concrete (GRC) is a material made of a cementatious matrix composed of cement, sand, water and admixtures, in which short length glass fibres are dispersed. It has been widely used in the construction industry for non-structural elements, like façade panels, piping and channels. GRC offers many advantages, such as being lightweight, fire resistance, good appearance and strength. In this study trial tests for concrete with glass fibre and without glass fibre are conducted to indicate the differences in compressive strength and flexural strength by using cubes of varying sizes. Various applications of GFRC shown in the study, the experimental test results, techno-economic comparison with other types, as well as the financial calculations presented, indicate the tremendous potential of GFRC as an alternative construction material.
STUDY OF AXIAL STRENGTH OF FRP- CONCRETE ELEMENT OF DIFFERENT CROSS-SECTIONAL ASPECT RATIO
Strength of concrete is a prime property which represents structure’s ability. To improve concrets strength and cracking resistance there are many ways but use of fiber is one which got popularity in industry. The fibres are used in concrete to control crack. So here in this project our aim is to perform axial strength tests on fiber reinforced concrete element for different aspect ratio. In the present work we fabricated, tested and compare distinct fiber reinforced polymer composite concrete element of different aspect ratios. The properties of these FRP concrete elements are compared with plain concrete elements having different aspect ratio. The fibres used are hooked end steel fiber. The grade of concrete is M25. In this experiment three aspect ratios-1.3, 1.6 and 1.9 are selected and percentage of steel in each case is 1.5% by weight of cement. Compressive strength test and Split tensile strength test were conducted on several cylinders to measure the effect of steel fibres on strength of concrete. For each aspect ratio of element three cylinders were tested for compressive and tensile strength test at curing period of 7 days and 28 days respectively. This will be beneficial to society where innovative structural designs are to be implemented by use of concrete
Use of laser scanning confocal microscopy for morphological taxonomy and the potential for digital type specimens (e-types)
The use of laser scanning confocal microscopy (LSCM) for creating taxonomic descriptions of copepods is investigated. A new technique is described, which employs a contour filter to process digital LSCM images, allowing taxonomic information to be quickly and accu- rately distilled into a simple illustration. LSCM allows the imaging of whole specimens, which can be rotated and viewed from any angle—a major benefit over light microscopy. Using this tech- nique, it is suggested that taxonomic descriptions can be rapidly produced in a fraction of the time required to produce similar descriptions using traditional light microscopy and hand drawing techniques. Good staining of specimens is, however, essential to produce accurate descriptions and more research is required in this area. The use of LSCM for morphological taxonomy shows great potential, not only for producing taxonomic descriptions, but also providing a comple - mentary adjunct to traditional type specimens in the form of 3D digital 'e-types' deposited in recognised international databases.