Use of industrial and agricultural waste products such as (sisal, flax, glass fiber and Carpet wastes fiber). materials in concrete is not only improves the strength of concrete but, also leads to the proper disposal of these materials, resulting in reducing impact of these materials on environment. Fiber admix can effectively improve the mechanical properties of concrete. Utilization of recycled fibers from post-consumer, industrial waste and agricultural waste offer some benefits such as waste reduction, resource conservation, also low-cost materials and reduced need for land filling. Concrete is a tension weak building material, which is often cracked not ridden in plastic and hardened states, drying shrinkage and so on, low tensile strength limited ductility and resistance to cracking. In order to improve attempt has been made to study the effect of these materials on ordinary Portland cement concrete. In the experimental work, glass fibers, sisal, flax and waste fiber in different percentage (0.5%, 1% and 2 %) has been added .The mechanical properties of concrete ware carried out (compressive strength test for 234 cubes, flexural strength test for 39 beams and indirect tensile strength test for 39 cylinders). The results showed improvement in mechanical and durability of concrete with glass fibers and waste fiber by a valuable degree.
Index Terms: Percentages added, concrete mixes, (sisal, flax, glass fiber and Carpet wastes fiber), Coarse Aggregate (CA), Fine Aggregate (FA), compressive strength test, flexural strength test, indirect tensile strength test.
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Wind and solar energy sources has intermittent nature, there behaviour of fluctuant speed and direction for wind and solar irradiance and sunshine hours for solar vary for the same region from season to season or month to month, rather from a second to the following second. Such intermittency and unpredictability presents a rationale behind the need of battery backups for micro-scale hybrid solar and wind systems, in order to cope with such variance against the electrical load demand needs to be fulfilled.
This article utilised semi hourly wind speed observations recorded at Armidale city in New South Wales in Australia, those observations covered the period of (1993-1913) and was measured at Armidale Airport Automatic Weather Station. Utilising the Test Reference Year (TRY) calculation methodology, a data base of semi hourly wind speed values for a typical day for a typical year has been developed. Average semi hourly wind speed observations on annual basis along with TRY daily solar irradiance developed in another earlier article are studied together approaching typical houses load in Armidale in all seasons are discussed. Thus conclusions provided recommendations for battery backup sizing for micro-Scale hybrid solar and wind systems.
Keywords: - Armidale NSW, test meteorological year, test reference year, wind speed, micro-scale energy generation, micro-wind turbines, battery backup sizing.
Automatic fire-fighting systems are installed in buildings and rooms where the fire hazard is comparatively high. This paper deals with the design and implementation of a firefighting system based on a Microcontroller. The system implements an early fire detection mechanism, and communicates with its owners wirelessly over GSM networks. It should also be capable of putting out fire by means of a firefighting pump, and to justify the status of the indicator panel that provides visual feedback of the current status of the monitored environment at any given time . According to the methodology, the Wireless Firefighting System uses temperature sensors to monitor its surrounding environment and alert the system owner in case it detects smoke, fire or that the temperature has gone outside the normal parameters. The sensor signals are fed to, and processed by (ATmega32) microcontroller program by BASCOM language which polls the sensors to monitor environment and shows its status on LED status indicator panel. The ATmega32 also connects to SIM900 GSM/GPRS module which enables the system to communicate their owners over long distances and notify them the status of their protected environment. The system has a firefighting pump on standby to operate in case fire has been detected through flaming sensors.
KEYWORDS : fire-fighting system , Bascom , GSM system , LED ,ATmega 32 .
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