KARAKTERISTIK MARSHALL QUOTIENT PADA HOT MIX ASPHALT MENGGUNAKAN AGREGAT ALAM SUNGAI OPAK

ABSTRACTThe purpose of this study is to determine the Marshall Quotient (MQ) value of hot mix asphalt (HMA), which uses natural aggregates from the Opak river. In addition to the MQ value in this study also examines the value of stability and flow in concrete asphalt mixtures with asphalt content of 6.5%. The research method used was an experimental method in the JPTSP FT UNY road construction laboratory. The testing standard used refers to the Indonesian National Standard (SNI). In addition to testing Marshall values, preliminary testing is also carried out to determine the quality of the material used. Material testing includes aggregate quality testing and asphalt quality testing. Based on the test results, the stability, flow and MQ values were 1177.01 kg, 3.20 mm and 384.05 kg/mm respectively. When compared with the requirements in the RSNI 03-1737-1989, only the flow values do not meet the requirements.Keywords: hot mix asphalt (HMA), stability, flow, marshall quotient ABSTRAK Penelitian ini bertujuan untuk mengetahui nilai Marshall/Marshall Quotient (MQ)dari campuran aspal panas/hot mix asphalt (HMA), yang menggunakan agregat alami dari kali Opak. Selain nilai MQ pada penelitian ini juga mengkaji nilai stabilitas dan kelelehan (flow) pada campuran aspal beton dengan kadar aspal 6,5%. Metode penelitian yang digunakan yaitu metode eksperimental di laboratorium konstruksi jalan JPTSP FT UNY. Standar pengujian yang digunakan mengacu Standar Nasional Indonesia (SNI). Selain pengujian nilai Marshall juga dilakukan pengujian pendahuluan untuk mengetahui mutu material yang digunakan. Pengujian material yang dilakukan meliputi pengujian mutu agregat dan pengujian mutu aspal yang digunakan untuk campuran aspal beton. Bersarkan hasil pengujian diperoleh nilai stabilitas, kelelehan, dan nilai Marshall berturut-turut sebesar 1171,01 kg, 3,20 mm, dan 384,05 kg/mm. Jika dibandingkan dengan persyaratan nilai stabilitas, kelelehan, dan nilai marshal yang tercantum pada RSNI 03-1737-1989, hanya nilai kelehan saja yang tidak memenuhi persyaratan. Kata kunci: hot mix asphalt (HMA), stabilitas, kelelehan, nilai marshall

CRUSHED-STONE AND MASTIC ASPHALT WITH CELLULOSE CONTAINING ADDITIVE

High-quality and durable asphalt pavement ensures safe and comfortable traffic, optimal logistics costs, territory attractiveness to construction investments, and industrial development. With constantly increasing loads on road pavements, it is necessary to improve the asphalt quality by introducing additives into the mixture, design methodology, scientific justification for the selection and preparation of raw materials. The paper proposes the development algorithm of crushed-stone and mastic asphalt modified by the new stabilizing additive, which consists of 90 % of cellulose fiber from waste paper, 5 % rubber powder, and 5 % bitumen. The optimal particle size distribution of the mineral component in the crushed-stone and mastic asphalt is considered to be 73% of crushed stone with fractions of 15–20, 10–15 and 5–10 mm, 16 % of dolomite sand from crushing screenings, 11 % of mineral powder, 0.4 % of stabilizing additive and 5.5 % of bitumen. The compressive strength of the developed composition is 2.3 times higher than that meeting the requirements of GOST 31015–2002 for the climatic zone II. The research results are confirmed by pilot-industrial tests in constructing the road pavement in Tyumen.

PENGARUH PENAMBAHAN PLASTIK HIGH DENSITY POLY ETHYLENE PADA LAPISAN PERKERASAN ASPAL BETON AC-BC

Increased population growth is accompanied by an increase in the volume of traffic. These conditions must be supported by good pavement quality. Bending hardening is the most preferred pavement on highway pavement structures. A common way to increase asphalt quality to repair damage is by adding additives, one of them is plastic. This research tries to use additives in the form of High Density Poly Ethylene plastic seed which is expected to add stability value and even able to overcome the weakness of asphalt pavement asphalt pavement layer against damage. This study used an experimental method to obtain a comparison result between normal asphalt mixture and HDPE-asphalt plastics, it will be seen that the utilization of HDPE plastic seed will influence the characteristics of concrete asphalt mixture with variation of plastic addition of 3% and 6% calculated from the asphalt weight of the plan. From the analysis of normal asphalt mixture and asphalt mixture of HDPE 3% and 6% asphalt found the optimum asphalt content (KAO) that test results obtained values of mixed characteristic parameters for the normal mixture of VIM (4.46%), VMA (16.42%), VFB (72.78%), Stability (1155 Kg), Flow (3.56 Mm), MQ (325 Kg / mm); HDPE plastic meet the specification of Bina Marga 2010 revision III that is 5.9%, 5% and 5.8%. From the analysis process of Marshall asphalt mixture 3% VIM (3.98%), VMA (14.67%), VFB (72.88%), Stability (1417 Kg), Flow (3.49 mm), MQ (406 Kg / mm ) And HDPE 6% mixture of HDPE 6% VIM (3.71%), VMA (15.60%), VFB (76.28%), Stability (1408 Kg), Flow (3.71 mm), MQ (379, 60 Kg / mm). Overall on the stability value with the added 3% and 6% HDPE plastic content, the stability value of the normal asphalt value increases.

UJI TITIK NYALA DAN TITIK BAKAR SEMARBUT ASPAL TIPE 4 BERDASARKAN SNI 2433:2011

ABSTRACTAsphalt is a filtering material of crude oil used as a pavement material. Asphalt quality becomes a very important and must be considered for pavement material, especially in its nature that can be burning and burning. Flash point and asphalt burn point is very important to know as planning of pavement material so that at certain condition of asphalt does not burn. This test aims to determine the point of flame and asphalt burn point. The asphalt samples were taken from asphalt inventory in the laboratory of pavement material of Department of Civil Engineering Education and Planning of FT UNY. The method used is to compare the result of flash point test and burn the emulsion asbuton extract using a modified solar refinery with penetration asphalt 60/70 (asphalt semarbut type 4) with flame point test and asphalt burn 60/70 regular penetration without modification with cleveland cup with regulation of SNI 2433: 2011. Data processing and graphics program used MS Exel 2010 application. Based on the test results concluded that the testing point and point of burning asphalt has been done obtained average flame point value at 250 ° C in an average time of 1.193 minutes, while the value of fuel point occurs when the asphalt temperature is 280 ° C in an average time of 3.48 minutes.Keywords: asphalt, flash point, fuel point ABSTRAK Aspal merupakan material hasil penyaringan minyak mentah yang digunakan sebagai bahan perkerasan jalan. Kualitas aspal menjadi suatu yang sangat penting dan harus diperhatikan untuk bahan perkerasan, terutama dalam sifatnya yang bisa menyala dan terbakar. Titik nyala dan titik bakar aspal sangat penting diketahui sebagai perencanaan bahan perkerasan jalan agar pada saat kondisi tertentu aspal tidak terbakar. Pengujian ini bertujuan untuk mengetahui titik nyala dan titik bakar aspal. Sampel aspal diambil dari aspal persediaan di laboratorium bahan perkerasan jalan Jurusan Pendidikan Teknik Sipil dan Perencanaan FT UNY. Metode yang digunakan adalah membandingkan hasil pengujian titik nyala dan bakar ekstrak asbuton emulsi menggunakan peremaja solar yang dimodifikasi dengan aspal penetrasi 60/70 (semarbut aspal tipe 4) dengan pengujian titik nyala dan bakar aspal penetrasi 60/70 biasa tanpa modifikasi dengan alat cleveland cup sesuai dengan peraturan SNI 2433:2011. Pengolahan data dan grafik digunakan program aplikasi MS Exel 2010. Berdasar hasil pengujian disimpulkan bahwa pada pengujian titik nyala dan titik bakar aspal yang telah dilakukan diperoleh rata-rata nilai titik nyala pada suhu 250°C dalam waktu rata rata 1,193 menit, sedangkan nilai titik bakar terjadi ketika suhu aspal 280°C dalam waktu rata rata 3,48 menit. Kata kunci: aspal, titik nyala, titik bakar

Management of Highway Projects in Egypt through Identifying Factors Influencing Quality Performance

While project management success focuses upon the processes and the successful accomplishments of cost and time objectives, product success deals with the quality of the final product. Recently, quality of the constructed highway has been considered highly important reason for the pavement response and its design life. The main objective of this paper is to improve the management of highway projects in Egypt by determining the most important factors influencing the quality performance of this industry. In total, 39 factors that may influence the quality of highway projects have been defined through a detailed literature review. The factors are tabulated in a questionnaire form, which is sent out to 13 owners of divided highways, 27 owners of regional roads, and 15 consultants. The analysis of the respondents’ perspectives using fuzzy triangle approach shows that the most important factors affecting the quality are availability of experienced staff in the owner’s and contractor’s teams during the project execution; efficiency of the owner’s inspection team; clarity of responsibilities and roles for each owner, consultant, and contractor; pavement which is not designed according to the regional conditions (e.g., soil type, temperature, and traffic volume); and asphalt quality and type used in the construction process.

A study on pothole repair in Canada through questionnaire survey and laboratory evaluation of patching materials

To investigate the current pothole repair practices in Canada, a questionnaire was distributed to Canadian transportation agencies. Outcomes showed a large portion of pothole repairs were performed during the summer season. Conventional cold mix, hot mix asphalt, Quality Pavement Repair, and Innovative Asphalt Repair were identified as commonly used patching materials. Moreover, the ‘throw-and-go’ method was the most common patching procedure and durability of repaired patches in winter was significantly less than repaired patches in summer. To evaluate the performance of patching materials, a laboratory testing program was conducted on cold mixes identified by the survey as being most commonly used. The laboratory results showed that curing time and temperature had a significant effect on strength gain for all cold mixes. Conventional cold mix showed higher stability and cohesion properties, while Quality Pavement Repair showed better moisture resistance and adhesion properties. All the cold mixes were sensitive to freeze–thaw damage.

A Simple Permittivity Calibration Method for GPR-Based Road Pavement Measurements

Cylindrical resonator principle can be used in GPR asphalt quality measurement calibration. This method relies on ordinary drill core samples that are regularly taken from measured road sections, but now only analyzed for dimensions, density and sometimes chemically. If such a drill sample is covered with proper conductive surfaces, a cylindrical cavity resonator is formed. The baseline of the GPR permittivity recordings can so be found by measuring the resonance behaviour of this covered sample, which can later still be used for those traditional analyses. A clear benefit is the resonator’s 1–2 GHz frequency range which equals that of common commercial GPR systems. Example results and reference readings from known dielectric material are shown. The obtained uncertainty in this case study is 0.02 units of permittivity, when measuring the same sample repeatedly.