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"Design thickness of pavement by mechanistic method may allow use of many types of pavement materials. Cement Treated Asphalt Mixture (CTAM) is one type of pavement surfacing layer which is a composite mixture consist of aggregates, asphalt and mortar cement. CTAM made from open graded and mortar cement as air void grouting agent resulted a new type of asphaltic mixture with a unique characteristic. So far, use of CI?AM is not too popular since its chart or constitutive model for determination of its rutting resistance (WTRCTAM) is not available yet. The aim of this study was to formulate the constitutive models of WTRCTAM.. For meet this purpose, laboratory experiments of Wheel-Tracking-Test using CTAM madeby varied types of asphalt; petroleum asphalt Pert 60 (AM), AM plus 3% latex type KKK-60 and AM plus Asbuton type of Retona-60 by ratio 4: 1, and three different of compressive strength of mortars cement. This test was conducted at four different temperatures. Constitutive modelsof WTRCrAM, either in term of DocTAM, RdCTAM or DSCTAM were formulate as a function of CTAM stiffiness modulus (SCTAM). By use of 86 experimentals data, a quite feasible constitutive models of WTRCTAM was derived."

"Lawele Granular Asphalt (LGA) merupakan aspal alam, yaitu aspal buton yang berada di Pulau Buton, Indonesia. Namun, penggunaan LGA dinilai belum maksimal, sehingga teknologi dalam pemanfaatan LGA masih terus dikembangkan. Penelitian ini dilakukan untuk mengoptimalkan penggunaan LGA dengan memaksimalkan proses ekstraksi LGA dalam campuran menggunakan oli bekas dan meningkatkan ketahanan campuran terhadap perubahan suhu dengan menggunakan Nano Crumb Rubber (NCR). Penambahan aditif ONCR dilakukan dengan nilai 5%, 10%, 15%, dan 20% terhadap kandungan aspal minyak serta 0% sebagai campuran pembanding. Stabilitas pada pengujian marshall menunjukan penurunan seiring dengan bertambahnya kadar ONCR. Berdasarkan spesifikasi pembanding, spesifikasi CPHMA, didapatkan KAO sebesar 8,55% pada penambahan ONCR 10% dan 8,92% pada penambahan ONCR 0%. Pengujian lebih lanjut dilakukan untuk mengetahui stabilitas dinamis campuran menggunakan Wheel Tracking Machine (WTM) pada suhu pengujian 26 °C, 35 °C, 45 °C, dan 60 °C. Campuran dengan penambahan aditif ONCR 0% menunjukan kinerja yang lebih baik dibandingkan campuran dengan penambahan ONCR 10%. Selain itu, performa ketahanan terhadap suhu ONCR 0% memiliki hasil yang lebih baik dibandingkan dengan ONCR 10%, yang ditandai dengan nilai deformasi alur yang lebih kecil pada setiap seuhu pengujiannya. Penambahan aditif ONCR dengan komposisi 85% oli bekas dan 15 % NCR tidak bisa meningkatkan kualitas campuran aspal. Penggunaan oli bekas pada campuran berperan signifikan dalam meningkatkan fleksibilitas aspal, yang ditandai dengan penurunan titik lembek campuran.

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Lawele Granular Asphalt (LGA) is natural asphalt, namely with buton asphalt that stored in Buton Island, Indonesia. However, the use of LGA is considered not optimal, so that, the technology to optimize the use of LGA still being developed. This research was conducted to optimize the use of LGA by maximalizing the LGA extraction process using used oil and increasing the mixture resistance to temperature change by using Nano Crumb Rubber (NCR). The addition of ONCR additive was carried out with value of 5%, 10%, 15%, and 20% to the content of oil asphalt also 0% for the comparison mixture. Stability in marshall testing showed a decrease with the increasing content of ONCR. Based on the comparison specifications, CPHMA specification, the value of optimum asphalt content obtained on the amount of 8,55% for the addition of 10% ONCR and 8,92% for the addition of 0% ONCR. Further test was carried out to determine the dynamic stability of the mixture by using the wheel tracking machine (WTM) at 26 °C, 35 °C, 45 °C, and 60 °C test temperatures. Mixture with the addition of 0% ONCR showed better performance than the 10% ONCR mixture. In addition, the 0% ONCR mixture temperature resistance performance showed better result compared to the 10% ONCR mixture, which is characterized by smaller rutting deformation values at each test temperature. The addition of ONCR additives with a composition of 85% of used oil and 15% of NCR could not improve the quality of the asphalt mixture. The use of used oil in the mixture has a significant role in increasing the flexibility of the asphalt mixture, which is characterized by a decrease in the softening point of the mixture."

"The most pavement type in Indonesia is flexible pavement, of which rutting as one of the pavement defect is caused by heavy load and high temperature . Rutting can cause the decrease of road service and followed by crack which leading to worse damage of pavement. The purpose of the study is to find out the performance of Stone Mastic Asphalt using asphalt cement pen 60 mixed with semi extraction of asbuton and the method of the research is laboratory experiments. The results showed that the addition of semi extraction asbuton significantly increases the resistance of the SMA mixtures to rutting, increasing modulus of asphalt mixtures and improve drain down and flushing. However the the resistance of mixture to particle loose decreases even though it is still in the limit requirement and it tends to become less brittle. As the addition of semi extraction asbuton increases some Stone Mastic Asphalt performance, and decreases the others, so that the determination of semi extraction asbuton proportion has to be minimum but still meet the requirement os asphalt mixture, by carrying further research about fatigue resistance of Stone Mastic Asphalt."

"ABSTRAKPerkerasan jalan raya dirancang dengan ketentuan mampu memenuhi faktor ketahanan terhadap deformasi akibat pengulangan beban roda. Deformasi alur terjadi ketika terjadi peningkatan tegangan tarik pada suhu tinggi akibat beban roda. Hubungan antara jumlah lintasan roda dengan tegangan permanen dapat diketahui melalui uji alur roda. Penelitian ini untuk mengetahui pengaruh nano crumb rubber dalam upaya peningkatan ketahanan aspal campuran panas terhadap pengaruh suhu akibat beban roda kendaraan khususnya pada jalan lalu lintas berat. Limbah ban bekas yang telah dihaluskan sampai butiran ukuran nano yang disebut dengan nano crumb rubber (NCR). Material ini ditambahkan pada agregat halus, pada umumnya disebut dengan pencampuran kering. Penambahan NCR sebesar 0%, 25%, 50%, 75%, dan 100% terhadap kandungan filler pada campuran aspal panas (ACWC). Dengan metode ini didapatkan bahwa terjadi penurunan dari segi kualitas, dilihat dari hasil stabilitas yang menurun cukup jauh. Penelitian dilanjutkan dengan melakukan penambahan NCR sebanyak 2,5% dan 5% dari berat aspal. Sehingga dapat diketahui pengaruh penambahan Nano Crumb Rubber yang didapat melalui uji Wheel Tracking Machine. Dari pengujian WTM didapatkan bahwa penambahan NCR dalam campuran beraspal akan meningkatkan kualitas dari campuran tersebut, pada suhu rendah peningkatan kualitas 2,5% NCR tidak setinggi penambahan 5% NCR, akan tetapi penambahan 5% NCR lemah terhadap suhu yang tinggi. Pada suhu pengujian 60°C 2,5% merupakan yang terbaik.

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ABSTRACT

Highway Pavement is designed with the provision of being able to meet the resistance factor to deformation due to repetition of wheel load. Rutting occurs when there is an increase in tensile stress at high temperatures due to wheel load. The relationship between the number of trajectories of wheels with permanent stress can be known through the wheel tracking test. This study was to determine the effect of nano crumb rubber in an effort to increase the resistance of hot mix asphalt to the influence of temperature due to vehicle wheel loads, especially on heavy traffic roads. Waste from used tires to nano-size granules called nano crumb rubber (NCR). This material is subtitute to fine aggregates, generally called dry mixing. The addition of NCR is 0%, 25%, 50%, 75%, and 100% of the filler content in hot asphalt mixtures (ACWC). With this method, it was found that there was a decrease in quality, from the results of the stability which decreased quite far. The research was continued by adding NCR as much as 2.5% and 5% of the asphalt weight. So that it can be seen the effect of adding Nano Crumb Rubber obtained through the Wheel Tracking Machine test. From the WTM test it was found that the addition of NCR in the asphalt mixture would improve the quality of the mixture, at low temperatures the increase in the quality of 2.5% NCR was not as high as the addition of 5% NCR, but the addition of 5% NCR was weak to high temperatures. At the test temperature 60 ° C 2.5% is the best."