Gampong Leuhan is one of the areas in West Aceh district where most of the people still use ground water as a source of daily necessities. Some people have used artesian wells or drilled wells, but if we look at the cost of manufacture is very expensive. If more use of ground water from the drilling system, then will be inflict an impact of land subsidence. with these conditions, to overcome the problem of the need for clean water and lack of water for people's lives, it needs more effective and efficient system. One of proses is to make rainwater harvesting system from the rooftop of the building/housing by maximizing high rainfall. Field survey indicate building area in Gampong Leuhan already in good condition and livable with dominant house rooftop made of zinc, that this condition will be very maximum in rainwater harvesting process. The analysis of rain harvesting potential in Gampong Leuhan shows 887.892 liters/day, with average rainwater harvesting potential for each house is 862,031 liters/day. The ratio between the total amount of water harvested is 887.892 liters/day with the total use of water for the needs of the people of Gampong Leuhan amounted to 482.346,90 liters/day, indicates that with rainwater harvesting techniques will be sufficient and able to become one of the alternatives in the supply of clean water. Keywords: Clean water, Rainfall, Potential of rain water, Rainwater harvesting.
Transport infrastructure is one element of the regional development is indispensable for the smooth access to the existing facilities in the region. The material used in the construction of highways, among others, aggregates, asphalt and filler. During this time the filler material that is often used in asphalt mixtures are cement, lime, stone dust, fly ash. However, these filler materials inventory is limited and relatively expensive. Accordingly, the need to find alternative cheap and easily obtained. One alternative is the utilization of local natural resources. The ash of coconut fiber can not be used anymore and are usually thrown away by society. By using the principles of reuse, recycle and recovery, coconut husk ash is expected to be recovered thus reducing the waste bin. The purpose of this study was to determine the effect of the use of coconut husk ash as filler to mix asphalt Retona Blend 55 and to find out the coconut husk ash can be used as a substitute for the filler material mixture highway or not. The method in this study using laboratory experiments. The research showed that most of the physical properties meet the requirements prescribed specifications. Examination of the physical nature of asphalt Retona Blend 55 which includes examination density, penetration, ductility, and the softening point indicates that the asphalt can be used for fulfilling the requirements set. The composition of the mixture that the best results are with the composition of the mixture by using coconut husk ash as filler by 4.5% with the optimum asphalt at 6.25%. The use of optimum asphalt of 6.25% resulted in a value of 1295.47 kg stability, flow plastically 4.0 mm, MQ 328.51 kg, density of 2.21 g / cm3, VIM 5.43%, 17.89% VMA, VFB 70.17%. Those values have been in accordance with the standard specifications of the Department of Public Works.Keywords: filler, coconut husk ash, Retona Blend 55, mixture of asphalt
This study was to determine the influence of fiber bamboo on the split tensile strength of concrete and to know the relationship between compressive and tensile strength. In the concrete mixture, fibre bamboo is added with a percentage of 0%, 0.5%, 1% and 1.5% of cement. Concrete strength of the design is 60 MPa with w/cvalue of 0.25. The coarse aggregate used had a maximum diameter of 12 mm, while the plasticizer used was 2% of cement. Testing was carried out at 28 days. For 0% fiber bamboo, the obtained strength was 62.47 MPa and a split tensile strength was 4.15 MPa. For 0.5% fiber, the obtained strength was 59.83 MPa and a split tensile strength was 5.12 MPa. For 1% fiber, the obtained strength value was 59.07 MPa and a split tensile strength was 5.91 MPa. For 1.5% fiber, the obtained strength value was 54.92 MPa and a split tensile strength was 6.48 MPa. Using fiber bamboo of the test shows a decrease in compressive strength, where the use of 0.5% fiber bamboo in concrete was the most optimal value. The use of the highest-fiber bamboo content of 1.5% achieved the optimum value of split tensile strength of 6.48 MPa.
Indonesia is an agricultural country where the livelihood of the majority of the population is farming. Geographically, Indonesia is an archipelagic country that has enormous natural potential, both in the marine and agricultural fields. The agricultural sector is a sector that has an important role in improving the welfare of the entire population of Indonesia. Rice fields in Blang Beurandang Village still rely on irrigation from using rainwater to meet irrigation water needs. To increase rice yields, an irrigation network is needed that can flow water to the rice fields. It is necessary to conduct a feasibility study on the irrigation to be built so that it can be calculated from an economic point of view whether the project is feasible or not. This feasibility study is equipped with an analysis using the first method; Net Present Value (NPV), the second is the Benefit Cost Ratio (BCR) analysis, the third is the Internal Rate of Return (IRR), and the fourth is the Break Event Point (BEP). The results of this study are the value of the investment cost of the construction project or the initial capital of the irrigation canal which is IDR. 2,088,058,500, and the value of the operational and maintenance costs is IDR. 9,578,250 per year. The results obtained that NPV was IDR. 30,614,330, BCR was 1.01%, IRR was 5.88% > 5% and BEP occurred in the 22nd year and the 7th month. Based on the calculation results obtained from these four methods, it shows that the irrigation channel construction project has met the eligibility requirements and the project can be implemented or built. This means that the construction of irrigation networks in the village is feasible.
The palm oil clinkers has a high silica content to use in high strength concrete mixtures as additives. In the study to replace silica fume used fly ash which is made from the palm clinkres and mashing then filtered with a No. #200 sieve. The study used a tested beam with 15 × 30 × 220 cm sized with concrete strength design (f’c) 60 MPa and (w/c) is 0.25. The main reinforced used 15.8 mm diameter with yield strength (fy) 446.34 MPa and shear reinforced used 11.9 mm diameter with yield strength (fy) 381.72 MPa. The compressive strength test at 28 days of 3 pieces of control specimens showed average value of 58.77 MPa. The maximum deflection in the middle of reinforced concrete beams is 31,8 mm at the maximum load 260.00 kN. The maximum deflection that happened is bigger than theoretical deflection with with two load points 17,126 mm. While the ductility produced by high quality reinforced concrete blocks with additives of palm oil clinkers is 2.313. Strain that occurs in tensile reinforcement and shear reinforcement under maximum loading conditions is 569,911 μm and 8,967 μm. The palm oil clinkers as a substitute for silica fume in high quality reinforced concrete is effectively used to increase concrete ductility.
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