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Tjitjik Wasiah Suroso
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Civil Engineering, Building, Construction & Architecture

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PENGARUH PENAMBAHAN PLASTIK LDPE (LOW DENSITY POLY ETHILEN) DENGAN CARA BASAH DAN CARA KERING TERHADAP KINERJA CAMPURAN BERASPAL Tjitjik Wasiah Suroso
Jurnal Jalan-Jembatan Vol 26 No 2 (2009)
Publisher : Direktorat Bina Teknik Jalan dan Jembatan

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Abstract

One of method tos increase the characteristic of asphalt mixture is to add plastic in chemical term know as polymer. Generally, plastic is in pellet form so that additional equipment is needed to mix with asphalt . This equipment is not available in all regions or in Asphalt Mixing Plant Unit . Therefore, solution is required to add polymer without additional equipment. There are two kinds of mixing methods with polymer without equipment .There are two kinds of mixing methods with polymer to increase the quality of asphalt mixture i.e wet and dry process. Wet process can be performed by adding polymer into hot asphalt then mixed uniformly . Mean while, dry process can be conducted by adding polymer into hot aggregate. The purpose of the research is to compare the effects of the two mixing methods of low quality polymer (LDPE type) on asphalt mix performance with optimum asphalt content which similar to optimum asphalt content of asphalt pen 60 resulted from Marshall Test. Polymer content is 3.5% asphalt weight taken from test result of addition of polymer content variation added to asphalt (wet process). The same amount of LDPE content is also added to hot aggregate (dry process) mixed for 35 – 40 second. The laboratory result showed that the dry process has greather Marshall caracteristics, dynamic stability and Resilient Modulus greater than asphalt pen 60, but lower than wet process. Economically Dry process is cheaper because of faster mixing time, easer to handle compared to wet and no mixer required. Key words: asphalt, dry process , wet process, optimum asphalt content, polymer, characteristic of asphalt mixture.
MENINGKATKAN MUTU ASPAL DI PERKERASAN JALAN YANG TELAH LAPUK DENGAN CARA DINGIN Tjitjik Wasiah Suroso
Jurnal Jalan-Jembatan Vol 26 No 1 (2009)
Publisher : Direktorat Bina Teknik Jalan dan Jembatan

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The quality of asphalt in road pavement is decreasing due to oxidation process and polymerization. Moreover, Indonesia is a tropical country where climatic factor can accelereate asphalt aging. There are two methods to improve the quality of asphalt, Firstly, by crack filling using asphalt or by emulsion asphalt with rejuvenated materials when road damage caused by hair cracks commanly called surface dressing. The second method is scrap materials from pavement added by additives or using fresh bitumen and aggregate commonly called recycling. The research showed that crack filling method increase asphalt quality in pavement and asphalt penetration from 10-11 to be 33-35 and ductility of asphalt from 14-15 cm to be 140cm, therefore pavement can arise two year service life. Cold recycling method increases the service life of pavement in moderate traffic up to 4 years. Keyword : Recycling, Additive materials, Aging, Asphalt mixture
FAKTOR-FAKTOR PENYEBAB KERUSAKAN DINI PADA PERKERASAN JALAN Tjitjik Wasiah Suroso
Jurnal Jalan-Jembatan Vol 25 No 3 (2008)
Publisher : Direktorat Bina Teknik Jalan dan Jembatan

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Early damage of pavement occurs when one of the factors does not meet specified requirements. Factors that cause pavement damage are quantity and quality of asphalt, numbers of passing in compaction, mixing and compaction temperature, etc. Therefore, research on pavement damage factors is required as early pavement damage occurred in many locations. The paper deals with the laboratory research results and the result of road improvement in several locations where early pavement damage occurred (less than a year). Research result shows that the causes of pavement damage are the lack of asphalt content (3.5 – 5.3%) and inadequate compaction so that asphalt easily hardened (penetration value of asphalt 20) as a result of high void content and low asphalt content. Laboratory research indicated that when mix temperature is lower than temperature of viscosity 270 ± 20cSt and low asphalt mix temperature will influence asphalt mix performance such as voids between aggregates are bigger, voids filled with asphalt are low. Those factors are also the causes of early damage. Keywords : Asphalt Content, Void Content, Asphalt Hardening
PENINGKATAN KINERJA CAMPURAN BERASPAL DENGAN KARET ALAM DAN KARET SINTETIS. Tjitjik Wasiah Suroso
Jurnal Jalan-Jembatan Vol 24 No 1 (2007)
Publisher : Direktorat Bina Teknik Jalan dan Jembatan

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One of the efforts in improving asphalt quality is intended to prevent deformation on pavement by adding rubber to asphalt. There are two types of rubber i.e. natural and synthetic rubbers. Natural rubber mostly can be found in rubber plantation in Indonesia. Therefore, the effective use of either natural or synthetic rubber can reduce the impact of heavy traffic load on road pavements which is currently occurred in some parts of Indonesia. Natural rubber has commonly been used, however, it is an organic substance that easily oxidized and polymerized by ultraviolet resulting in the reduction of its elasticity. On the other hand, synthetic rubber is less susceptible against oxidation and temperature. This paper describes a research result regarding the influence of addition a natural and synthetic rubber on asphalt quality and the performance of asphalt mix using Marshall test, Modulus resilient using UMATTA, dynamic stability and rate of deformation using Wheel Tracking Machine. The result showed that the addition of synthetic rubber to asphalt resulted in a better properties compared to the addition of natural asphalt especially in its resistance to aging, softening point, dynamic stability and rate of deformation. Keywords : Asphalt, Natural and synthetic rubber, Dynamic stability, Rate of deformation, Resilient modulus
PENGARUH PENAMBAHAN MODIFIER ASPAL YANG MENGANDUNG MANGAN (Mn) TERHADAP SIFAT REOLOGI DAN KARAKTERISTIK CAMPURAN Tjitjik Wasiah Suroso
Jurnal Jalan-Jembatan Vol 24 No 3 (2007)
Publisher : Direktorat Bina Teknik Jalan dan Jembatan

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Abstract

The solution to cases of road pavement failure in accommodating traffic loads and densed traffic is needed. One of materials needed to increase the quality of road pavement is that the addition of additive containing Manganese component. The article describes the laboratory and field research result and the influence of the addition of additives containing manganese component on asphalt Rheological properties and asphalt mix performance both in the laboratory and field. The result showed that at early stage, the addition of additive decreased asphalt penetration value and decreased Marshall stability of asphalt mixture. Rheological properties and performance increased over time. Field experiment experiment conducted by Daniels (1990) cs showed that asphalt mix performance using additive containing manganese compound increased during service, and decreased layer thickness ranging between 20 to 30%. In another location film thickness increased about 30 – 45 % than conventional asphalt, and appeared crocodile cracks on the location with modifier, therefore experiment in different location should be conducted to gain effective result of the material. It is suggested that the materialis used in stable pavements when additive is used, the process and the influence of it on asphalt mixture should be studied. Key word : Modifier, Asphalt, Asphalt mixture, stability
Hubungan antara Komposisi Kimia Aspal dan Sifat Rheologi Aspal Tjitjik Wasiah Suroso
Jurnal Jalan-Jembatan Vol 22 No 1 (2005)
Publisher : Direktorat Bina Teknik Jalan dan Jembatan

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The article presents the research result on the relationship between chemical properties and rheological properties of several asphalt samples as road pavement materials. The research was conducted in the following ways 1) chemical analysis to determine the content of asphalten and the parameters of malten composition as the comparison between the number of nitrogen fraction base plus acidafit I and Acidafit II plus paraffin before and after heating. 2) to determine rheological properties of asphalt, asphalt penetration, weight decrease (evaporation of light fraction) before and after heating, asphalt penetration ratio (ageing). Determination of asphalt malten composition parameters was done by solubility and precipitation method developed by Stenberg Rostler. The result showed that there is a relationship between malten composition parametr, asphalten content, penetration before and after heating. Asphalten content is indentical to asphalt penetration value (asphalt hardness), high content of asphalten, low asphalt penetration. Asphalt Weight decrease (fraction evaporation) does not parallel with the parameter of malten conposition value eventhough light fraction changed into densed fraction due to heating. In general, there is no significant relationship between the change of asphalt chemical properties as a result of heating and asphalt ageing. In Other words, the change of chemical properties indefinitely parallel with the change of rheological asphalt properties. Therefore, asphalt durability cannot be determined from malten composition value or asphalt chemical composition and cannot be used as a reference in the evaluation of road pavement failure. Further research is required to find out the relationship between asphalt chemical properties and mechanical properties of asphalt mixes so that the findings can be used to predict the durability of road pavements.
HASIL PENELITIAN PENGARUH PEMANASAN BERULANG TERHADAP MUTU ASPAL KERAS tjitjik wasiah suroso
Jurnal Jalan-Jembatan Vol 9 No 4 (1993)
Publisher : Direktorat Bina Teknik Jalan dan Jembatan

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Penggunaan aspal sebagai bahan konstruksi jalan makin lama makin meningkat, dilain pihak banyak ditemuiperkerasanjalan yang telah mengalami kerusakan sebelum umurrencana dicapai. Banyak faktorpenyebab kerusakan perkerasanjalan sebelum umur tercapai antara lain mutuaspal tidak memenuhi syarat. Agar mutu perkerasan jalan yang dihasilkan sesuai yang diharap maka mutlak pengendalian mutu bahan kontruksi jalan, misal pengendalian mutu aspal. Pada saat ini pengiriman aspal dari pabrik/tangki penimbunan melalui dua cara yaitu langsung dalam drum atau melalui tangki mobil. Pengiriman melalui tangki mobil disertai pemanasan karena untuk menghindari penyumbatan atau untuk memudahkan pemindahan aspal dari tangki ke AMP atau dalam drum-drum di lokasi tujuan. Untuk mengetahui sejauh mana pengaruh pemanasan berulang terhadap penurunan mutu aspal sehingga tidak memenuhi persyaratan, perlu dilakukan penelitian. Dari hasil penelitian pengaruh pemanasan terhadap mutu aspal diperoleh hasil sebagai berikut : Pada pemanasan tscf - 16cf C secara terbuka/ dengan adanya oksidasi 02, maka hanya dapat dilakukan 2 kali, 3 jam , sifat fisik dan kimianya tidak menunjukkan penurunan mutu. Pada pemanasan tscf - 16cf C secara tertutup/ tanpa adanya oksidasi maka pemanasan hanya diijinkan sampai 4 x 3 jam, mutu aspal pada batas Pada pemanasan 95' C secara tertutup/ tanpa adanya oksidasi secara berulang tidak terjadi perubahan mutu
HASIL PENELITIAN KADAR ASPHALTENE DALAM ASPAL tjitjik wasiah suroso
Jurnal Jalan-Jembatan Vol 10 No 2 (1993)
Publisher : Direktorat Bina Teknik Jalan dan Jembatan

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Aspal ideal adalah aspal yang mempunyai kadar asphaltene antara 15 - 25 % (rata-rata 20 %) karena telah diketahui bahwa suatu aspal sangat ditentukan oleh jumlah asphaltene. Kadar asphaltene tinggi menghasilkan penetrasi rendah. Apabila pen terlalu rendah maka life time aspal dapat diperkirakan akan rendah karena aspal dikatakan dalam keadaan kritis apabila penetrasi aspal = 20, duktilitas < 15. Oleh karena itu perlu diketahui kadar asphaltene dalam aspal yang beredar di pasaran sehingga dapat diketahui salah satu faktor penyebab kerusakan-kerusakan secara dini pada perkerasan jalan. Dari hasil penelitian diperoleh ; Pada aspal 60 yang beredar di pasaran mempunyai kadar asphaltene di atas 20 % sebanyak 30 %, yaitu : Aspal ex A ± 23 % Aspal ex B ± 23 % Aspal ex C ± 25 % Aspal ex 0 ± 15 % Aspal ex E ± 15 % Aspal ex F ± 15 % Aspal ex G ± 17 % Pada aspal pen. 80 yang beredar di pasaran mempunyai kadar asphaltene yang di atas 20 % sebanyak 25 %, yaitu : Aspal ex A ± 18 % Aspal ex B ± 18 % Aspal ex C± 24 % Aspal ex 0 ± 15 % Aspal ex E ± 15 % Aspal ex F ± 15 % Aspal ex G ± 17 % Aspal ex H ± 24 % Mengingat tingginya kadar asphaltene merupakan salah satu faktor tingginya kerusakan jalan sebelum waktunya maka disarankan disiplin untuk melakukanpengujian sesuai dengan ketentuan yang ada sebelum digunakan pada pelaksanaan pembangunan jalan.
HASIL PENELITIAN KEAWETAN ASPAL YANG BEREDAR DI PASARAN Sebelum tahun 1988 dan tahun 1988 sampai saat ini tjitjik wasiah suroso
Jurnal Jalan-Jembatan Vol 11 No 1 (1994)
Publisher : Direktorat Bina Teknik Jalan dan Jembatan

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Banyak faktor penyebab kerusakan jalan sebelum umur rencana dipenuhi antara lain mutu aspal. Dari segi mutu fisik tidak terjadi masalah (memenuhi syarat). Oleh karena itu Penulis mencoba meneliti mutu aspal dari segi komposisi kimia, menurut Rost/er and white aspal yang awet bi/a mempunyai parameter komposisi maltene (chemical reactivity) 0,4 - 1,2 dari hasil penelitian aspal yang beredar dipasar sebelum tahun 1988 mempunyai chemical reactivity 0,59 - 0,94. Dari tahun 1988 sampai dengan saat ini mempunyai chemical reactivity 1,03 - 1,17 (aspal diambang batas tidak awet) sehingga kemungkinan faktor inifah yang merupakan salah satu penyebab pendeknya umur perkerasan jala n. Oleh karena itu agar aspal mempunyai umur panjang (awet) sebaiknya aspal dibuat dengan campuran yang tepat (jumlah resin seimbang dengan asphltene) dan dibuat dari hidrokarbon yang mempunyai BM > 400 sehingga aspal mempunyai nilai chemical reactivity < 1.
Bahan peremaja untuk proses daur ulang perkerasan beraspal yang dapat diperoleh dengan mudah. tjitjik wasiah suroso
Jurnal Jalan-Jembatan Vol 19 No 3 (2002)
Publisher : Direktorat Bina Teknik Jalan dan Jembatan

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Pemanfaatan kembali perkerasan beraspal yang telah rusak yang dikenal dengan nama daur ulang perkerasan beraspal dimana aspal pada perkerasan lama dapat diperbaiki kembali dengan penambahan bahan peremaja. Saat ini bahan peremaja untuk daur ulang perkerasan aspal diperoleh dari luar negeri ataupun dari dalam negeri dimana mutunya belum sesuai dengan yang kita harapkan. Oleh karena itu Puslitbang Prasarana Transportasi mencoba membuat bahan dasar produksi dalam negeri. Komposisi bahan peremaja yang dapat digunakan salah satunya adalah dari campuran olie SAE 10 dan aspal dengan perbandingan 17,5% : 82,5% campuran tersebut mempunyai ketahanan pelapukan yang kecil serta harga yang relatif murah dan memenuhi kriteria (persyaratan) sebagai bahan peremaja tipe Medium (M). Formula tersebut bisa dibuat dengan mudah serta bahan mudah diperoleh sehingga ekonomis dan praktis, dapat dilakukan dengan kemampuan/pendidikan yang rendah sekalipun.
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