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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL Semesta Teknika Martabe : Jurnal Pengabdian Kepada Masyarakat Adimas : Jurnal Pengabdian Kepada Masyarakat Abdimas Umtas : Jurnal Pengabdian kepada Masyarakat Prosiding Seminar Nasional Program Pengabdian Masyarakat
Edi Hartono
Universitas Muhammadiyah Yogyakarta
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Economics, Econometrics & Finance Education Engineering Medicine & Pharmacology Social Sciences

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Journal : Semesta Teknika

 1 
Uji Beban dan Analisis Lendutan Model Pelat Fleksibel yang Didukung Tiang-Tiang pada Tanah Pasir Edi Hartono
Semesta Teknika Vol 16, No 1 (2013): MEI 2013
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v16i1.434

Abstract

Sand commonly has a good bearing capacity. Problems may occur when sand has low density and thick deposit. Flexible plate foundation may be used in this soil but plate deflection may be still high. To reduce deflection and improving soil density, piles were used to support the plate. Installing piles made foundation system stiffer. The objectives of this study are  to studies about behavior of plates and plate with a pile of sand on the ground, influence of plate thickness , pile length and spacing of the pole deflection, and the influence of the bond between the plate and the deflection of the pile .In this study is used test box of 1.2 m depth, 1.2 m width, 1.2 m length, and 1.0 m depth filled out with sand. Plate models were made from plexiglas of rectangular and square geometry. Piles were of steel pipesof 2.5cm diameter. Some parameters were as follows : plate thickness, plate geometry, pile length (L), pile spacing (s), bounding between plate and pile (fix or free), ’piled’ and freestanding foundation, and base pile enlargement. The behavior of the plateswere observed under loading (point load). The result shows that plate deflections were affected by the method of pile installation, plate thickness and pile length. For a ticker plate, contact surface between plate and soil was wider. For the 40cmx10cm plates with fix end pile, deflectionswere founf to reduced up to 70% compared with free end pile. The ’piled foundation’ on 40cmx10cm plates, L=20cm, s=4d, deflections were reduced 83,63% compared with free standing foundation.
Penggunaan Campuran Abu Sampah Organik dan Limbah Karbit sebagai Bahan Pengganti Semen pada Mortar Edi Hartono; Siti Rofi’ah ZA; Abd Dzargifar Hemeto
Semesta Teknika Vol 12, No 1 (2009): MEI 2009
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v12i1.757

Abstract

Organic waste and calcium carbide waste can be used as replacement material for cement in mortar. Organic waste ash and calcium carbide waste are mixed with some variations and then conducted tests to obtain the characteristics of the materials used in this study. Content of mortar comparation base on weight that are organic waste-calcium carbide waste : sand : water of 1.0 : 2.75 : 1.0. Compositions of waste organic ash and calcium carbide waste have some variations, i.e., 0.9-0.1, 0.7-0.3, 0.5-0.5, 0.3-0.7 and 0.1-0.9. Control mortar also made as discussant for mixture variations of organic waste ash and calcium carbide waste in compressive strength test. Control is mortar mixed with common Portland cement. All of mortars are mold with molder that has dimension 5 cm × 5 cm × 5 cm. Compressive strength test is done when age of mortars is 3 days, 14 days, and 28 days. Based on laboratory test results, compressive strength on 14 days at the highest variation of 70 % organic waste ash and 30 % calcium carbide waste was found to be 26,7 kg/cm2. But, this result of compressive strength is lower compared to compressive strength of control mortar which was found to be 79.9 kg/cm2 on 14 days. Highest compressive strength of all mixture variation showed that mixture of waste organic ash and calcium carbide waste can be used as a mortar/mixture of brick pair in simple house type and very simple house type that needs compressive strength as much as 25 kg/cm2for wall that do not bear of load. 
Analisis Lendutan Model Pelat Fleksibel dengan Tiang Perbesaran Ujung dan Pelat Tidak Rapat Tanah Pada Tanah Pasir Edi Hartono
Semesta Teknika Vol 17, No 1 (2014): MEI 2014
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v17i1.410

Abstract

Problems in sandy soil may occur when sand has low density, uniform gradation and thick deposit. Flexible plate foundation may used in this condition but plate deflection still high. To reduce deflection and to improve soil density, piles were used to support the plate. Installing piles made foundation system stiffer. The objectives of this study are to studies about behavior of plates and plate with pile on sandy soil. Plate deflection was observed with variation of plate thickness, bottom pile enlargement, and soil-plate-pile interaction (free standing pile and piled foundation). 1,2 x 1,2 x 1,2 m box container filled with sandy soil was used as soil media. Square and rectangular plexiglass plate were used to modelled plate. Steel pipe with 2,5 cm  in diameter were used as pile model. The behavior of the plates were observed under loading (point load). The results shows that plate deflections were affected on plate thickness, bottom pile enlargement and soil-plate-pile interaction. For a ticker plate, contact surface between plate and soil was wider. For the 40 cm x 10 cm plates with base pile enlargement, deflections were found to reduced up to 21,26%. The ‘piled foundation’ on 40 cm x 10 cm plates, (installing with 20 cm pile length, and 10 cm spacing between pile), deflections were reduced 83,63% compared with free standing foundation.
Co-Authors Abd Dzargifar Hemeto Agus Setyo Muntohar Aristyasari, Yunita Furi Kartika Wulandary Muhammad Afzalurrahman restu faizah Siti Rofi’ah ZA Sumiyanto Sumiyanto Syaikul Khabir Muhyidin Virgina Dwiyas Alfaini Widodo Widodo Willis Diana