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Sentot Hardwiyono, Sentot
Universitas Muhammadiyah Yogyakarta
Engineering

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Pengaruh Perubahan Suhu pada Modulus Elastik Lapisan Beraspal Perkerasan Lentur dalam Pengujian Regangan yang Berbeda Hardwiyono, Sentot
Jurnal Semesta Teknika Vol 14, No 1 (2011): MEI 2011
Publisher : Jurnal Semesta Teknika

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Abstract

Flexible pavement strength (Flexible Pavement) is affected by changes in the nature around the changes in temperature affect the strength asphalt layer and seasonal changes (precipitation) affect the strength of the soil layer is not particularly asphalt base. Research to determine the effect of temperature for a layer of flexible pavement in the field can be done in two ways. The first destructive test (Destructive Test, DT) such as core-drill are routed by means of a laboratory test using Universal Testing Machine (UTM). The second test is not destructive (Non Destructive Test, NDT) such as direct field test using a Falling Weight Deflectometer (FWD) and tools Spectral Analysis of Surface Wave (SASW). Testing the temperature of use as has been mentioned with a different strain performed at the Soekarno-Hatta road and highway Cikampek-Purwakarta, Bandung, West Java, Indonesia. Testing methods and testing different strain rates produce different elastic modulus values in testing asphalt flexible pavement layer. The general conclusion, the higher the temperature imposed on the asphalt pavement layer elastic modulus flexural yield whose value has declined. Conversely the lower the temperature imposed on the asphalt pavement layer elastic flexural modulus values produce increasingly rising. Different strain rate testing (FWD, UTM and SASW) on asphalt pavement layer is influenced also by changes in temperature.
Pemanfaatan Batugamping Keprus Sebagai Campuran Agregat Pada Lapis Pondasi Agregat Kelas B Hardwiyono, Sentot; Widianti, Anita
Jurnal Semesta Teknika Vol 8, No 2 (2005): NOVEMBER 2005
Publisher : Jurnal Semesta Teknika

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Abstract

Batugamping keprus banyak terdapat di Kabupaten Gunung Kidul, Yogyakarta. Penelitian ini bertujuan untuk mengkaji kemungkinan pemakaian batugamping keprus sebagai bahan campuran agregat pada  lapis pondasi agregat kelas B. Penelitian dilakukan dengan membuat berbagai variasi persentasi campuran batugamping keprus, sirtu dan tanah. Batugamping keprus bervariasi dari 15% hingga 85%, sirtu bervariasi dari 75% hingga 5% dan tanah tetap sebesar 10% dari berat total campuran. Pada setiap campuran dilakukan uji batas cair, indeks plastisitas, CBR unsoaked dan CBR soaked pada kepadatan maksimal dengan mengacu pada SNI. Hasil penelitian menunjukkan bahwa nilai batas cair, nilai indeks plastisitas dan nilai CBR unsoaked dari berbagai persentasi campuran batugamping keprus, sirtu dan tanah (kecuali untuk campuran 85% batugamping keprus, 5% sirtu dan 10% tanah) memenuhi spesifikasi yang telah ditetapkan oleh Bina Marga,  namun nilai CBR soaked tidak memenuhi spesifikasi tersebut.  
Penghitungan Tebal Setara Metode Boussinesq-Exel dan FWD-ELMOD pada Perkerasan Lentur Hardwiyono, Sentot
Jurnal Semesta Teknika Vol 15, No 1 (2012): MEI 2012
Publisher : Jurnal Semesta Teknika

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Abstract

Calculating the Flexible Pavement System (FPS) response has initiated by Boussinesq, Burmister, Huang and more scientists around the world. Determining modulus elasticity each stratum FPS very important to note to designing the Flexible Pavement. The purpose of this study is to determine the elastic modulus of each layer in the profile Flexible Pavement Systems (FPS) with a thickness equivalent method Boussinesq-Exel and FWD-ELMOD. Tests were run on the Soekarno-Hatta Cikampek-Purwakarta-Bandung and West Java highways, Indonesia. The test results showed a good correlation between the modulus of each layer in the FWD testing with those of Boussinesq-Exel test.
Pengaruh Penambahan Parutan Karet Ban Gradasi Tipe 2 terhadap Parameter Marshall pada Campuran Hot Rolled Sheet Wearing Course Hardwiyono, Sentot
Jurnal Semesta Teknika Vol 15, No 2 (2012): NOVEMBER 2012
Publisher : Jurnal Semesta Teknika

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Abstract

The provision of road infrastructure cannot be separated with the pavement construction itself. One of the materials used is asphalt that is really related to natural resources. Using asphalt is not durable in many cases because of the oxidation process, mainly due to heating. This can lead the road (flexible pavement) to fast deformation, including cracking. Nowadays, there are many additives to improve the asphalt quality. One of them is adding rubber to the asphalt which can give more durability under high temperatures, increase its adhesion, and improve its flexibility. This study used the additives in the form of shredded rubber with the content of 20%, 21%, and 22% of the total mass of asphalt. The shredded rubber was mixed with the asphalt, and then heated at least 45 minutes before mixing it with the aggregates. The HRS WC mixture with the tire rubber was compared in term of optimum asphalt content and Marshall results. The results show that adding shredded tire rubber in HRS WC mixture can decrease the flow. This shows that the addition of shredded rubber can decrease of the sample deformation, so that the mix will not be too plastic and easily deformed under the loading. It can also increase the VIM and decrease the VFA, so that it can reduce the bleeding possibility.
Pengaruh Perubahan Suhu pada Modulus Elastik Lapisan Beraspal Perkerasan Lentur dalam Pengujian Regangan yang Berbeda Hardwiyono, Sentot
Semesta Teknika Vol 14, No 1 (2011): MEI 2011
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v14i1.587

Abstract

Flexible pavement strength (Flexible Pavement) is affected by changes in the nature around the changes in temperature affect the strength asphalt layer and seasonal changes (precipitation) affect the strength of the soil layer is not particularly asphalt base. Research to determine the effect of temperature for a layer of flexible pavement in the field can be done in two ways. The first destructive test (Destructive Test, DT) such as core-drill are routed by means of a laboratory test using Universal Testing Machine (UTM). The second test is not destructive (Non Destructive Test, NDT) such as direct field test using a Falling Weight Deflectometer (FWD) and tools Spectral Analysis of Surface Wave (SASW). Testing the temperature of use as has been mentioned with a different strain performed at the Soekarno-Hatta road and highway Cikampek-Purwakarta, Bandung, West Java, Indonesia. Testing methods and testing different strain rates produce different elastic modulus values in testing asphalt flexible pavement layer. The general conclusion, the higher the temperature imposed on the asphalt pavement layer elastic modulus flexural yield whose value has declined. Conversely the lower the temperature imposed on the asphalt pavement layer elastic flexural modulus values produce increasingly rising. Different strain rate testing (FWD, UTM and SASW) on asphalt pavement layer is influenced also by changes in temperature.
Penghitungan Tebal Setara Metode Boussinesq-Exel dan FWD-ELMOD pada Perkerasan Lentur Hardwiyono, Sentot
Semesta Teknika Vol 15, No 1 (2012): MEI 2012
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v15i1.446

Abstract

Calculating the Flexible Pavement System (FPS) response has initiated by Boussinesq, Burmister, Huang and more scientists around the world. Determining modulus elasticity each stratum FPS very important to note to designing the Flexible Pavement. The purpose of this study is to determine the elastic modulus of each layer in the profile Flexible Pavement Systems (FPS) with a thickness equivalent method Boussinesq-Exel and FWD-ELMOD. Tests were run on the Soekarno-Hatta Cikampek-Purwakarta-Bandung and West Java highways, Indonesia. The test results showed a good correlation between the modulus of each layer in the FWD testing with those of Boussinesq-Exel test.
Co-Authors Anita Widianti