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Uniaxial Stress-Strain Behavior for Material Pavement Stabilization by Using Zeolite Hamzani Hamzani; Munirwansyah Munirwansyah; Muttaqin Hasan; Sugiarto Sugiarto; Burhanuddin Burhanuddin; Yovi Chandra
International Journal of Engineering, Science and Information Technology Vol 3, No 1 (2023)
Publisher : Malikussaleh University, Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52088/ijesty.v3i1.435

Abstract

The characteristics of semi-flexible pavement (SFP) are strongly influenced by the proportion of cement mortar content filling the voids in the mixture. SFP behavior due to repeated traffic loads causes the pavement structure to experience stress and strain around the wheel axis, resulting in a rapid decline in performance with cracks and permanent defects. Evaluation of the properties of the mixture on the stress-strain parameters of the influence of additives and substitution of many SFP mixture-forming materials has been carried out. The purpose of this study was to determine the stress-strain models of SFP with the effect of waste tire rubber (WTR) additives in asphalt and Aceh natural zeolite substitution in cement mortar under uniaxial compressive load. The porous asphalt mixture is designed in accordance with the optimum asphalt content and open graded aggregate based on the specifications of Bina Marga Regulation 2010 and Australian Asphalt Pavement (AAPA) 2004. The composition of zeolite in SFP mixture can affect the stress behavior, where zeolite can inprove quality of the mortar cement so that it can slow down the development of the SFP mixture flatness and the maximum stress obtained is 17 MPa at 5% zeolite composition. The bilinear model of stress-strains was proposed the results show a good agreement with experimental results.
TEGANGAN DAN REGANGAN DINAMIS PERKERASAN SEMI FLEKSIBEL DENGAN MODIFIKASI REOLOGI ASPAL DAN SUBSTITUSI ZIOLIT PADA SEMEN MORTAR Hamzani Hamzani; Munirwansyah Munirwansyah; Sugiarto Sugiarto; Muttaqin Hasan
Teras Jurnal : Jurnal Teknik Sipil Vol. 11 No. 1 (2021): Maret 2021
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v11i1.405

Abstract

Abstrak Ketahanan struktur perkerasan akibat timbulnya tegangan dan regangan menyebabkan retak awal saat terjadinya deformasi permanent sehingga kegagalan perkerasan akibat kelelahan umur tidak dihindarkan. Fenomena tersebut dapat dikurangi dengan perkerasan yang memiliki cukup kekakuan, kelenturan. Modifikasi material dilakukan untuk meningkatkan nilai kekakuan dan kelenturan campuran dengan menggunakan jenis campuran,gradasi, dan modifikasi aspal yang tepat sebagai usaha pengembangan campuran perkerasan beraspal. Tujuan dari penelitian ini  mempelajari tegangan dan regangan tarik campuran PSF  terhadap beban berulang dengan tambahan WTR dan menggunakan ziolit alam sebagai pengganti sebagian semen untuk mortar yang dinjeksi ke dalam rongga aspal porous. Desain campuran aspal berpori dimulai dengan penentuan proporsi aspal optimal dengan agregat bergradasi terbuka sebagaimana ditentukan dalam sepesifikasi (AAPA) 2004. Uji Marshall dilakukan untuk mengetahui spesifikasi yang disyaratkan dan dilanjutkan dengan uji specimen yang telah diinjeksi mortar semen dengan pengujian lentur metode pembebanan empat titik untuk evaluasi tegangan dan regangan tarik. Nilai tegangan dan regangan dinamis dianalisis pada setiap variasi ziolit dalam mortar semen. Substitusi ziolit alam pada semen mortar dapat mempengaruhi tegangan dan regangan dinamis campuran PSF, di mana semakin besar komposisi ziolit dalam semen mortar nilai tegangan dan regangan yang dihasilkan semakin tinggi. Kata kunci: perkerasan semi-fleksibel, ziolit alam, reologi aspal, tegangan dan regangan, beban dinamis  Abstract The resistance of the pavement structure due to the consequence of stress and strain causes the initial reset when the occurrence of permanent deformation so that pavement failure due to age is avoided. This phenomenon can be reduced by a pavement that has sufficient stiffness and flexibility. Material modification is carried out to increase the value of the stiffness and flexibility of the mixture by using the right type of mixture, gradation, and asphalt modification as an effort to develop an asphalt pavement mixture. The purpose of this study was to study the stress and tensile strain of the semi-flexible pavement (SFP) mixture against repeated loads with the addition of rubber tire waste (WTR) and to use natural zeolite as a part of cement for mortar injected into the porous asphalt cavity. The design of a porous asphalt mixture begins with the determination of the optimal proportion of asphalt with an open grade aggregate specified in the Asphalt Pavement Association Australia (AAPA) 2004.Marshall test is carried out to see the required specifications and test specimens that have been injected with cement with a four-point loading bending method test for stress evaluation and tensile strain. The values of dynamic stress and strain were analyzed for each variation of ziolite in cement mortar. Substitution of natural ziolite in cement mortar can affect the dynamic stress and strain of the PSF mixture, where the greater the ziolite composition in cement mortar, the higher the resulting stress and strain. Keywords: Pavement semi-flexible, natural zeolite, asphalt rheology, dynamic stress and strain  
SENSITIVITAS KELAYAKAN EKONOMI PADA RENCANA PEMBANGUNAN JEMBATAN LAWE ALAS - PEDESI KABUPATEN ACEH TENGGARA PROVINSI ACEH M. Isya; Sugiarto Sugiarto; Jetno Harja
Teras Jurnal : Jurnal Teknik Sipil Vol. 11 No. 1 (2021): Maret 2021
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v11i1.411

Abstract

Abstrak Elemen-elemen dasar biaya dan  manfaat dalam analisis kelayakan proyek jarang diwakili oleh hanya satu nilai yang benar dan pasti. Dengan demikian hasil studi kelayakan ekonomi proyek juga bukanlah kepastian. Untuk itu perlu dilihat sejauh mana perubahan elemen biaya dan manfaat terhadap kelayakan ekonomi proyek. Cara sederhana untuk melakukan hal tersebut adalah dengan melakukan analisis sensitivitas. Pada analisis sensitivitas kelayakan ekonomi ini dilihat sejauh mana perubahan tingkat kelayakan jika terjadi perubahan pada komponen biaya dan manfaat. Analisis sensitivitas pada kajian ini dilakukan pada rencana proyek pembangunan jembatan Lawe Alas - Pedesi di Kabupaten Aceh Tenggara Provinsi Aceh. Skenario sensitivitas yang dilakukan di sini mencoba melihat pengaruh pertambahan biaya dan berkurangnya manfaat terhadap kelayakan ekonomi proyek pembangunan jembatan tersebut. Dengan demikian tingkat resiko kelayakan ekonomi dapat diketahui. Kata kunci: Study kelayakan, kelayakan ekonomi, analisis sensitivitas   Abstract The basic elements of costs and benefits in a project feasibility analysis are not  represented by a single one as a definite value. Consequently, the results of the project's economic feasibility study are also uncertain. Based on that reason, it is necessary to see the influence of variability of the elements of costs and benefits to the economic feasibility of the project. A simple way to determine the feasibility variability  is by doing sensitivity analysis scenario. In this feasibility sensitivity analysis, the variability of costs and benefitsare done by increasing the cost and lowering the benefit. The sensitivity analysis in this study was applied to the new  Lawe Alas - Pedesi bridge construction project in Aceh Tenggara District Aceh Province. The sensitivity scenario done in order to determined the effect of increased costs and reduced benefits on the economic feasibility. Thus the level of risk of economic feasibility can be also determined. Keywords: feasibility study, economic feasibility, sensitivity analysis