https://hdl.handle.net/20.500.12852/136 2026-04-05T16:42:42Z https://hdl.handle.net/20.500.12852/2252 A study on the improvement of potable water supply system in Sitio Paradahan Barangay Toyungan, Calinog, Iloilo Mamon, Bonifacio V. This study is conducted because of the need to know whether it is feasible to upgrade the system from level 2 to level 3. The study is limited only to the technical feasibility. Financial and economic viability were not considered. The present demand is projected to fifteen (15) years and the supply is evaluated whether it can cater the demand. The existing facilities are also examined whether it can be utilized for upgrading the system. Hydraulic principles and formulas are used in the design and computations of the data. Abstract only 2004-01-01T00:00:00Z https://hdl.handle.net/20.500.12852/2251 Performance evaluation of concrete produced using recycled concrete as both fine and coarse aggregates Paloma, Jonah S. Infrastructure is at the top of list of factors that influence competitiveness due to rapid economic development in cities and has developed concrete into the most significant construction material in the world. This is due to the fact that concrete is produced from natural materials such as sand and gravel; available in all parts of the globe, and that concrete is a versatile material, giving architectural freedom. The production of concrete annually amounts to 1.5 to 3 tons per capita in the manufacturing world, making the concrete industry with all of its suppliers a major player in the building sector. In the last two decades, there has been increasing awareness on environmental concerns in the concrete industry, aiming at reducing the total environmental impact of using natural materials to a minimum, with the emphasis of sustainability on how to deal with the issues of limited resources. A lot of different tools have been developed in order to reduce the environmental impact of concrete and concrete structures and to promote the production of "green concrete". Improvement or rehabilitation of older or ageing infrastructure is also given importance and that includes the demolition of the existing structure to be replaced by a new one. Demolished materials should be utilized productively and should not add to the problem of environment Demolished concrete is one of the recyclable materials but some debris gleaned from demolition sites are left piled on the roads and causes environmental hazard; some are transported to municipal landfill and minimizes the area where fast growing population could build their houses for; and some are additional waste and causes problem on solid waste disposal. Substitution of waste materials in concrete will conserve diminishing resources, and will avoid the environmental and ecological damages caused by quarrying and exploitation of the raw materials for making concrete. To some extent, it will help to solve the problem otherwise encountered in disposing of the wastes. Concrete may be defined as mixture of water, cement or binder, and aggregates, where the water and cement or binder form the paste and the aggregates form the inert filler. In absolute volume terms the aggregate amounts to 60-80 percent of the volume of concrete and is, therefore, the major constituent (Majid, 2000). The aggregate type and volume influences the properties of concrete, its mix proportion and its economy. Conventional concrete aggregate consists of sand (fine aggregate) and various sizes and shapes of gravel or stones (coarse aggregate). Recycled waste materials such as plastic, glass and recycled concrete are potential substitutes as alternative fine and coarse aggregate materials. Tests are needed to be performed in order to investigate the mechanical properties and durability characteristics of the concrete containing recycled constituents. The essential requirement for an aggregate for concrete is that it remains stable within the concrete and in the particular environment throughout the design life of the concrete. The characteristics of aggregate must not affect adversely the performance of the concrete in either the fresh or hardened state. Aggregate parameters such as hardness, strength, and durability are known to be important for engineered-use concrete. The aggregate must be "clean," without absorbed chemicals, clay coatings, and other fine materials in concentrations that could alter the hydration and bond of the cement paste. These potential aggregates are to be evaluated on their compatibility with other materials, concrete properties and economy. Successful utilization of waste material as aggregate depends on ensuring that the properties of concrete will remain unchanged. There is a growing interest in substituting alternative aggregate materials, largely as a potential use for recycled materials. Significant research has been done on many different materials for use as alternative aggregate such as bagasse, plastic, glass, fiberglass, rubber, coconut and palm kernel shells, and recycled concrete. Compressive strength and modulus of elasticity of concrete containing recycled fine aggregate are lower than in concrete containing sand. Substitution of sand for the fines of recycled concrete aggregates does not result in improved strengths. They are used to a limited extent and require some processing. There are lots of information gaps that need to be answered. Among these are the compressive strength of the concrete containing recycled concrete as both fine and coarse aggregates, how is it compared to the compressive strength of conventional concrete, and what are the characteristics of concrete using recycled concrete as both fine and coarse aggregates. It is for these reasons that this study is proposed. Objectives of the Study This study was conducted to test and evaluate concrete produced using recycled concrete as both fine and coarse aggregates. Specifically, this study aimed: 1. To test and evaluate the concrete produced using the conventional and recycled concrete aggregates in terms of the following: a. workability; b. compressive strength; and, c. flexural strength 2. To compare the concrete produced using the conventional and recycled concrete aggregates in different proportions. 3. To determine the acceptability of the concrete produced using recycled concrete aggregates in different proportions. 4. To determine the applicability of the concrete produced using recycled concrete in an infrastructure. Abstract only 2010-01-01T00:00:00Z https://hdl.handle.net/20.500.12852/2250 Design of a 20-kilowatt micro-hydro power system for the electrification of Barangays Rosal and Rivera in Libacao, Aklan Militar, Jeriel G. Electrification is vital to the government’s rural development program. However, electrification of remote and isolated barangays via grid extension is currently rendered almost impossible by economic and technical barriers. The alternative to extending the grid to these barangays, as determined by the Department of Energy, is the putting up of a stand-alone community-based power plant. But considering the low income level and the lack of technical know-how of the people in most of these communities, such a plant should be simple enough that it can be operated and maintained by the local people, and should have low operation and maintenance cost such that it can be sustained by the community. This study looked into the feasibility of putting up a micro-hydro power system as an alternative to extending the grid to energize Barangays Rosal and Rivera in Libacao, Aklan, two very remote unenergized barangays which are adjacent to a common waterfall. It was found that installation of a 20-kW micro-hydro power system using locally fabricated turbine, penstock and load controller to serve both barangays was technically feasible; that although the initial installation cost was beyond the paying capacity of the beneficiaries in the two barangays, the project could qualify for a funding from the Department of Energy under the “O Ilaw” Program. Abstract only 2003-01-01T00:00:00Z https://hdl.handle.net/20.500.12852/2249 Industrial motor control trainer Palomo, Rene P. The study of an Industrial Motor Control Trainer for the students is a contribution to the Electrical Engineering Department of Western Visayas College of Science and Technology. It is a solution to the students’ problem on industry application particularly for the fresh graduates looking for a job. Industries of today are highly advanced when it comes to electric motors. They have come up to many types of motor controls. It is high time that hands on for motor starting and motor controls be made available to the students. The study of electricity is like a study of air. You don’t learn by merely looking at it, rather, by feeling it or sensing its presence. It is with the recognition of the importance of the power of electricity. In every tertiary level institution, be it of technological, engineering or vocational advocacy, subjects in electricity or electric power are often part of the curriculum. With the demands of vocational courses, as well as professional electrical courses, the curricula offerings for electrical subjects are being strengthened, either by the provision of competent instructional staff, or the establishment of adequately functional laboratory and skill facilities to cater the needs of the industry and to achieve the instructional goals of the institution. To answer this problem, the proponent of this study aims to design and construct an industrial motor control trainer as an instructional device in teaching motor controls in the electrical engineering program. The findings of the study show that: 1. The trainer could perform more than twenty laboratory exercises efficiently. 2. The trainer can be use in applying the principles, theories and functions of industrial motor control trainer. 3. The trainer can be use as a demonstration unit to the students by showing the different electrical circuits that the trainer could perform. 4. The trainer can be use to discover, create or formulate new electrical circuit in the motor control. 5. The trainer can perform as a fault simulator to develop students’ skills and knowledge in electrical circuits or trouble shooting. 6. The device is economical in terms of construction and maintenance. 7. The trainer is made of light material to facilitate transferring and mobility. 8. Necessary precautions have been observed to insure maximum effectiveness and safety. Based on the findings of the study, the conclusion is given: The industrial Motor Control Trainer can be designed and constructed. Based on the conclusions drawn, it is recommended that: 1. The result of this study be disseminated to the field in order that administration and electrical engineering instructors will be informed of its use. 2. The Industrial Motor Control Trainer should be used as an instructional device in the teaching of Electric Motor Control. 3. The preparation of modules and instructional manuals be encouraged among electrical engineering instructors to improve classroom instruction. 4. Electrical Engineering instructors be encouraged to construct and improve the model using electronically controlled system for advancement of instructional process in electrical engineering. 5. A rack of electric motor be provided to further improve the gadget. 6. Financial support from government and non-government agency for the mass production of the trainer be extended to those who desire to undertake the job. 7. A replication of this study be made using another sample in a different setting. Abstract only 2005-01-01T00:00:00Z