1,720,993 research outputs found
Sistem Buka Tutup Atap Otomatis Rumah Kaca dengan Kontrol Cuaca Berbasis Mikrokontroler Arduino Nano
No full textA tool has been designed for an automatic greenhouse opening and closing system with weather control based on the Arduino nano microcontroller. This tool is designed to keep plants in the greenhouse, where these principles when the weather sensor reads analog signals that occur in the surrounding area, then converts them into digital signals, servo motors act as roof drivers and then processed in the system, the data will be displayed on the LCD. . Open the roof lid automatically based on the weather sensor, the weather sensor will read the weather conditions around, the weather is sunny or bright at a temperature of 28-30 °C and when it rains above 100% then the roof opens, the weather is cloudy or rainy when the temperature is below 28° C and rainfall is below 100% then the roof is closed and the weather is hot or hot when the temperature is above 31 °C and the rainfall is above 100% then the roof is closed too. From the results of testing and measurement of sensor tools that can work well and can measure according to what has been determined.55 HalamanKertas Karya Diplom
Karakterisasi Papan Komposit Berbahan Serbuk Gergaji Kayu dan Serat Daun Nanas dengan Resin Polyester
Get PDFResearch has been carried out on the characterization of composite boards made from pineapple leaf fiber wood sawdust and polyester resin, with the characterization carried out including physical tests, mechanical tests and microstructural tests. Composite boards are made with 6 different composition variations. Then printed on a hot press for 30 minutes at 90°C. The physical characteristics test consists of density test values, porosity, and water absorption test values. Mechanical property testing consists of elastic modulus test, fracture modulus test, and microstructure analysis with SEM-EDX. produces maximum and minimum density values of 1.275 gr/cm³ and 0.309 gr/cm³, maximum and minimum porosity values of 0.356% and 0.282%, maximum and minimum water absorption values of 0.345% and 0.269%, maximum elastic modulus values found in the sample B is 15,377 MPa and the minimum value in sample A is 3,457 MPa. The maximum modulus of fracture is 12.791 MPa for sample B, the minimum value for sample A is 3.457 MPa, the maximum compressive strength value is 1.5413 MPa for sample B, and the minimum value for sample A is 0.5591 MPa. With testing density, porosity, and modulus of fracture that has met the standards of SNI 03 - 2105 - 2006, while testing the modulus of elasticity and compressive strength still does not meet the standards of SNI 03 - 2105 - 2006.73 HalamanSkripsi Sarjan
Characterization of Thermoplastic Polypropylene (PP) with Rice Husk Ash Silica Filler Synthesized using the Sol Gel Method
No full textThe manufacture of thermoplastic polypropylene with rice husk ash filler has been
carried out using the sol gel method. Preparation and synthesis of rice husk ash
silica was carried out using HCl IM and NaOH IM solvents. The composition of each
thermoplastic was varied and mechanical tests (tensile test, elongation break and
Modulus of Elasticity (MOE)) and characterization (X-Ray Diffraction, Scanning
Electron Microscopyand X-Ray Fluorescence) were carried out. In this study, five
variations of the addition of rice husk ash silica filler were used, namely (0,1,3,5,7
%wt) then pressed with a hotpress machine with an ASTM D638. The prepared rice
husk ash silica was then characterized using XRD (X-Ray Diffraction) to determine
the crystal size. SEM (Scanning Electron Microscopy) to determine the morphology
of thermoplastics. XRF (X-Ray Fluorescence) to determine the elements in
thermoplastics. The most optimum composition was obtained at a variation of 5%wt
with a tensile strength value of 29.41 MPa. Elongation Break 2.91 mm and MOE of
407.4 MPa. The XRD (X-Ray Diffraction) characterization results show that the
silica produced from the preparation of rice husk ash is amorphous and has a size of
0.1 µm. SEM(Scanning Electron Microscopy) results show that the morphology of
the sampel is agglomerated, causing clumps og particles in the thermoplastic
sampel. XRF (X-Ray Fluorescence) results show that the elements contained in
thermoplastic contain 53.99% SiO2, 9.21% K2O, 7.97% Al2O3, 6.13% MgO, 6.10%
CaO, and 5.53% Fe2O3.73 PagesSkripsi Sarjan
Pembuatan dan Karakterisasi Beton dengan Campuran Abu Sekam Padi dan Serat Daun Nanas terhadap Sifat Fisis dan Mekanik Pada Beton
No full textResearch on the manufacture of construction concrete based on rice husk ash and pineapple leaf fiber by the method of cast in situ. The concrete made in this study had several variations, namely 0%, 2,5%, 5%, and 7,5% with the addition of rice husk ash and pineapple leaf fiber as the cement reduction materials. This research was conducted with a comparison of concrete quality mixture materials K-225, namely cement : sand : crushed stone 3/4 was 1 : 2 : 3, and rice husk ash and pineapple leaf fiber enough. The parameters tested include physical tests (density, porosity, and water absorption), mechanical tests flexible strength and compressive strength) using the Universal Testing Machine and Material Testing Equipment as well as microstructure and elemental content tests using the SEM-EDX. From the research results, the results of the density test was 2,510 × 103 kg/m³ - 2,451 × 103 kg/m3, the porosity test was 7,64% - 5,73%, and the water absorption was 0,296% - 0,243%, and the compressive strength test was 23,66 MPa – 16,45 MPa, and the flexural strength was 33,3 MPa – 25,3 MPa. Based on the morphological analysis, there was a structure of rice husk ash and pineapple leaf fiber in the concrete. The concrete produced in this study had pores and based on the results of the EDX analysis, element C (carbon) had the highest percentage.79 HalamanSkripsi Sarjan
Manufacture and Characterization Tests of Composite Boards Based on Corn Husk Fiber - Water Hyacinth Fibers and Sawdust Using Epoxy Resin
No full textComposite board has been made with corn husk fiber, water hyacinth fiber and wood sawdust with epoxy resin as an adhesive. The composition of each fiber was varied and physical tests (density, porosity, water absorption and thickness expansion) and mechanical tests (MOE, MOR and compressive strength) were carried out, and microstructure was analyzed using SEM-EDX. The results of testing the physical and mechanical properties with optimum results were density of 1.03 gr/cm3, porosity of 10.48%, water absorption capacity of 10.22%, thickness expansion of 2.91%, MOR 256.05 kgf/cm2, MOE 228 kgf/cm2, and compressive strength of 3.19 MPa and obtained SEM-EDX test results on samples where pores were visible at 1000x magnification and increasingly clear at 10,000x magnification. The results showed that the physical (porosity, absorption and thickness expansion) and mechanical (MOR and compressive strength) tests met the standards of SNI 03-2105-2006, while the MOE test did not meet the standards. For density testing, it complies with SNI 01-4449-2006 standards. The composite board can be used as a substitute for wood for furniture materials.78 PagesSkripsi Sarjan
Pembuatan dan Karakterisasi Beton dengan Campuran Abu Sekam Padi dan Serat Daun Nanas terhadap Sifat Fisis dan Mekanik Pada Beton
No full textResearch on the manufacture of construction concrete based on rice husk ash and pineapple leaf fiber by the method of cast in situ. The concrete made in this study had several variations, namely 0%, 2,5%, 5%, and 7,5% with the addition of rice husk ash and pineapple leaf fiber as the cement reduction materials. This research was conducted with a comparison of concrete quality mixture materials K-225, namely cement : sand : crushed stone 3/4 was 1 : 2 : 3, and rice husk ash and pineapple leaf fiber enough. The parameters tested include physical tests (density, porosity, and water absorption), mechanical tests flexible strength and compressive strength) using the Universal Testing Machine and Material Testing Equipment as well as microstructure and elemental content tests using the SEM-EDX. From the research results, the results of the density test was 2,510 × 103 kg/m³ - 2,451 × 103 kg/m3, the porosity test was 7,64% - 5,73%, and the water absorption was 0,296% - 0,243%, and the compressive strength test was 23,66 MPa – 16,45 MPa, and the flexural strength was 33,3 MPa – 25,3 MPa. Based on the morphological analysis, there was a structure of rice husk ash and pineapple leaf fiber in the concrete. The concrete produced in this study had pores and based on the results of the EDX analysis, element C (carbon) had the highest percentage.79 HalamanSkripsi Sarjan
Analysis The Effect of Variations of Layers of Sandwich Composite Board from Coconut Coir Waste and Blood Clam Shell on Physical, Mechanical, and Acoustic Properties
No full textThis research was conducted to determine the effect of variations in the layers of sandwich composite boards from coconut coir fibre waste and blood clam shells on physical, mechanical, and acoustic properties as one of the developments of composite boards for alternative solutions in the use of wood with optimal use of waste. Based on the tests carried out, the best test results were obtained in sample 2 (S2) with a layer variation of 25% blood clam shell (face); 50% coconut fibre (core); 25% blood clam shell (back) due to the use of a mixture of blood clam shell powder and epoxy resin in the skin layer (face and back) which is denser so as to produce physical properties with density test results (0.99 gr/cm3); water absorption (5.05%) and porosity (5%); and porosity (5%) and stronger mechanical properties with tensile strength test results (316.88 kgf/cm2) and flexural strength (935.89 kgf/cm2), and produce good acoustic properties with the highest transmission loss test results of 63 dB in the low frequency range (125-1000 Hz) and and 53 dB in the medium frequency range (1000-4000 Hz) with the best Sound Transmission Class (STC) value STC 42 in sample 1 (S1) and STC 30 in Sample 2 (S2). SEM-EDS microstructure test results show the elements of C, O, Ca, and Si spread the most in order in sample 1 (S1) and sample 2 (S2).103 PagesSkripsi Sarjan
Characterization of Thermoplastic Low Density Polyethylene (LDPE) with Rice Husk Ash (RHA) Nano Silica Filler Synthesized using the Coprecipitation Method
No full textLDPE thermoplastics have been made with rice husk ash nanosilica filler which is
synthesized using the coprecipitation method. Nanosynthesis of rice husk ash (RHA)
silica was carried out with HCl 2M and NaOH 2.5M solvents with a ratio of 1:3. The
synthesized nanosilica was then characterized using XRD and obtained an average size
of 23.09 nm. Based on the results of XRF characterization, it is known that there are
92.99% SiO2 and the most abundant element, namely Si 43.47%. The composition of
each LDPE/nanosilica RHA was varied (100/0, 98/2, 96/4, 94/6 and 92/8 % by weight)
and mechanical properties in the form of tensile strength, elongation at break and
modulus of elasticity were tested using ASTM D638 standard. The results of the
mechanical test were obtained with the optimum tensile strength value in the
composition (96/4% by weight) of 10.53 MPa, the optimal elongation value at break
in the composition (100/0% by weight) of 201.5%, and the optimum elastic modulus
value in the composition (96/4% by weight) of 226.57 MPa. The addition of RHA
nanosilica as a filler is proven to be able to improve the mechanical properties of LDPE
thermoplastic in terms of tensile strength and modulus of elasticity compared to LDPE
without filler material (100/0% by weight).73 PagesSkripsi Sarjan
Pemanfaatan Serbuk Cangkang Kelapa Sawit dan Serat Cangkang Kulit Kopi dalam Pembuatan Beton Polymer dengan Resin Epoxy sebagai Perekat
Get PDFResearch has been carried out on polymer concrete using palm oil shell powder, coffee shell fiber, with epoxy resin. This research aims to determine the effect of adding palm oil shell powder and coffee shell fiber on the physical and mechanical properties of polymer concrete. The results showed that the physical properties were the highest density in the sample composition (60;15;0;25), porosity in the sample composition (60;0;15;30) and water absorption (60;0;15;30) and the lowest are density (60;0;15;25), porosity (60;10;0;30) and water absorption (60;10;0;30). The research results on the highest mechanical properties were compressive strength (60;15;0;25), tensile strength (60;15;0;25) and flexural strength (60;10;0;30). And the lowest is the compressive strength of the sample composition (60;0;15;30), tensile strength (60;0;15;30) and flexural strength (60;0;15;30). SEM test results show that the microstructure of polymer concrete shows differences between concrete sample A2 and polymer concrete sample B2. In concrete sample A1, the SEM test results show that the dark surface color in the image is a mixture of materials that are close to homogeneous, which uses materials from sand, palm oil shell powder and coffee shell fiber powder which are roasted until black and during kneading all the sample materials are produced. The dark color and visible white lumps are epoxy resin caused by lack of stirring in mixing the ingredients. In sample B2, there were visible large lumps of resin which was caused by a lack of stirring in mixing the ingredients. From the image results, it can also be seen that there are few pores on the surface of the sample.71 HalamanSkripsi Sarjan
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