scholarly journals The Variation Test And Extraction Equipment On Optimum Asphale Research By Using Gasoline Solvent

2017 ◽  
Author(s):  
Fitridawati Soehardi
Keyword(s):  
Field Study ◽  
Asphalt Mixture ◽  
Test Results ◽  
Extraction Test ◽  
Post Test ◽  
Asphalt Content ◽  
Extraction Equipment

Published Based on the Binamarga Specification 2010 at third revision, the extraction test should be carried out using the specimen from the loose asphalt mixture extracted from the back of the finisher bitumen machine. The purpose of this research is to find out the result of pretest and post test extraction asphalt content. The Extraction test using two equipment, they are Soklet and Centrifuge. The specimens used AMP, Asphalt Finisher and Core, which involved gasoline solvent. Based on the asphalt level extraction test results, the appropriate equipment was used centrifuge with the level accuracy as requirement of Binamarga Specification 2010 at third revision and the level of ease used as equipment in the field study. The asphalt content obtained for AMP 5,51%, Asphalt Finisher5,46% and Core 5.34%. As for the socket asphalt content obtained is AMP 5.55%, Asphalt Finisher 5.50% and Core core 5. 41%. The extract test value of asphalt content decreased, so it can be formulated KA JMF

scholarly journals Prediction Model of Asphalt Content of Asphalt Mixture Based on Dielectric Properties

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Yanhui Zhong ◽  
Yilong Wang ◽  
Bei Zhang ◽  
Xiaolong Li ◽  
Songtao Li ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Prediction Model ◽  
Room Temperature ◽  
Asphalt Mixture ◽  
Aggregate Size ◽  
Asphalt Pavements ◽  
Test Results ◽  
Wide Range ◽  
Asphalt Content ◽  
Ground Penetrating

The rapid detection of asphalt content in asphalt mixture is of great significance to the quality evaluation of asphalt pavement. Based on the dielectric properties of an asphalt mixture, the prediction model of asphalt content is deduced theoretically using three types of dielectric models: Lichtenecker-Rother (L-R) model, Rayleigh model, and Bottcher equation. Under the condition of laboratory mixing at room temperature (about 20–25°C), a dielectric test of asphalt mixture is conducted to verify the applicability of the model. The test results indicate that the dielectric constant of the asphalt mixture is inversely proportional to the asphalt content and directly proportional to the aggregate size of the mixture. Among the models, the Rayleigh model has a wide range of applications and exhibits a high accuracy, with an average relative error of only 1.86%. The results provide a theoretical basis for the nondestructive testing of asphalt pavements using ground-penetrating radar.

Pavement Performance of Hot In-Place Recycling for Waste Asphalt Mixtures

2013 ◽  
Vol 668 ◽  
pp. 292-296
Author(s):  
Ya Li Ye ◽  
Chuan Yi Zhuang ◽  
Jia Bo Hu
Keyword(s):  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Asphalt Pavements ◽  
Pavement Performance ◽  
Test Results ◽  
Technical Parameters ◽  
Stable Performance ◽  
Wheel Tracking Test ◽  
Asphalt Content ◽  
Wheel Tracking

With the early asphalt pavements have been into the stage of medium maintenance or overhaul, recycling is a very important way for waste asphalt mixtures. A sample was taken in the expressway from Huhhot to Baotou, and the waste mixtures were extracted from field and sieved; so that the new aggregates can be determined and mix design was carried. With the aid of the penetration, the softening point and the viscosity in 135°C test, the quantity of the regenerant and the asphalt content were ascertained. Through the high temperature stable performance, the anti-low temperature performance, the water stability and the Hamburg wheel-tracking test, the appropriate gradation and the optimum asphalt content were determined. The test results showed that the pavement performance of the waste asphalt mixture was enhanced obviously with hot in-place recycling, and it has achieved technical parameters for old asphalt mixture.

Research of Particle Contact Mechanics Behaviors and Applicative Evaluation for Asphalt Mixture

2010 ◽  
Vol 168-170 ◽  
pp. 86-93
Author(s):  
She Liang Wang ◽  
Xi Yu Zhu ◽  
Xian Tang
Keyword(s):  
Contact Stiffness ◽  
Asphalt Mixture ◽  
Contact Theory ◽  
Test Results ◽  
Dead Weight ◽  
Particle Contact ◽  
Stiffness Model ◽  
Wheel Tracking Test ◽  
Asphalt Content ◽  
Wheel Tracking

Different gradation types may have different particle contact behaviors for asphalt mixture, so that it holds diverse pavement performances. The particle contact theory explains the particle contact behaviors law during movement. A particle contact behaviors model was established, which is easy to describe and apply on the spot. A line contact stiffness model was used to simulate particle contact behaviors for gradation types of CA0.2, CA0.4, CA0.6 and CA0.8 when particle of asphalt mixture is moving with dead weight. Their pavement performances were verified with Marshall test, wheel tracking test, gyratory compacting test and the index of potential energy test under optimum asphalt content. Test results show that their service performance is identical to simulation result of particle contact during movement with dead weight. With the help of the research, it can supply some theoretical and applicative bases for an optimum mixture gradation design and indoor gradation simulating design for asphalt mixture.

Analysis Surface Structure Improvement of Runway Threshold 07-25 Using FAARFIELD

2021 ◽  
Vol 1 (2) ◽  
pp. 52-62
Author(s):  
Ir.ACO WAHYUDI EFENDI, ST., MT
Keyword(s):  
Surface Structure ◽  
Surface Deformation ◽  
Asphalt Mixture ◽  
Surface Shape ◽  
Low Density ◽  
Test Results ◽  
Internal Factors ◽  
Surface Conditions ◽  
Structure Improvement ◽  
Asphalt Content

Runway or runway is an area used by aircraft to take off. The length of the runway depends on the size of the aircraft served. Runway has a pavement structure that can withstand the weight of an aircraft when it wants to fly. This study discusses the damage to the surface structure of the Threshold 07 and Threshold 25 runways at the Sultan Aji Muhammad Sulaiman (SAMS) runway in Sepinggan Balikpapan. Damage to the pavement surface often results from significant heat temperatures from the aircraft when taking off. Visual observations show that there are problems with the Threshold 07 and Threshold 25 pavement surfaces, the damage that occurs is the change in the surface shape of some segments, where the surface deformation eleves are up to 40 mm. Test results from Coredrill samples show that there are internal problems in the asphalt mixture, namely high asphalt content and low density value. By looking at the conditions above, there are problems caused by external and internal factors of the existing pavement, especially the surface conditions namely Threshold which is a location where the load is in MTOW conditions and the aircraft is moving slowly as well as high temperatures (environment and pavement)

scholarly journals Characteristics of Mixed Porus Asphalt with Combination of LDPE, CPO and PEN 60/70

2021 ◽  
Vol 1 (4) ◽  
pp. 19-24
Author(s):  
Meidia Refiyanni ◽  
Chaira Chaira
Keyword(s):  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Test Results ◽  
Porous Asphalt ◽  
The Road ◽  
Road Pavement ◽  
Asphalt Content ◽  
Poly Ethylene ◽  
The Second Variation

The quality of the road depends on the pavement, drainage conditions, and materials. For this reason, it is necessary to make innovations in improving the quality of road pavement, one of which is increasing the material. There are many types of pavements, one of which is porous asphalt pavement. Porous asphalt has many cavities that is easy for water to pass but has a low stability value with high           permeability. This research will utilize Low Density Poly Ethylene (LDPE), as an additive, CPO, and Pen 60/70 in a porous asphalt mixture. The purpose of this study was to determine the characteristics of the porous asphalt mixture by substituting LDPE and CPO for Pen 60/70. The method used in analyzing the characteristics of the porous asphalt mixture refers to the specifications of the Australis Asphalt Pavement Association (AAPA) (2014), with parameters Camtabro Loss (CL), Asphalt Flow Down (AFD), VIM, stability and flow. The gradation used in this study is an open gradation. This research was started from determining the value of Optimum Asphalt Content (KAO), with two variations, namely Variation 1 (1% LDPE, 10% CPO, 89% pen 60/70), variation 2 (5% LDPE, 10% CPO, 85% Pens 60/70). The KAO value of variation 1 is 5.03% and the second variation is 4.75%. After obtaining the KAO value, LDPE and CPO are substituted. The test results for the porous asphalt mixture for CL values were 34.12% and 27.07%, respectively; AFD value of 0.13% and 0.12%; for the VIM value of 14.90% and 19.03%; stability value 603.24 kg and 603.19 kg; and flow values are 5.03 mm and 4.80 mm. In general, the value obtained from the test meets the required requirements. However, the durability value of the mixture did not meet the requirements, namely 60.15% and 48.22%, with the condition >90%.

Effects of 1,2-Dihydro-2,2,4-Trimethyl-Quinoline (TMQ) Antioxidant on the Marshall Characteristics of Crepe Rubber Modified Asphalt

2021 ◽  
Vol 876 ◽  
pp. 39-44
Author(s):  
Bahruddin ◽  
Arya Wiranata ◽  
Alfian Malik
Keyword(s):  
Natural Rubber ◽  
Asphalt Mixture ◽  
Test Results ◽  
Mixing Process ◽  
Rubber Content ◽  
Modified Asphalt ◽  
The Road ◽  
Asphalt Content ◽  
Marshall Stability ◽  
Rubber Product

The use of natural rubber-like crepe rubber as an asphalt additive is very susceptible to aging. Aging on asphalt crepe rubber can occur during the mixing process or its use for the road. Studies on the prevention of aging on asphalt are still being developed to produce asphalt resistance to aging and have good performance in preventing deformation. Some studies that have been done are the addition of other additives such as antioxidants. This study aims to study the effect of adding crepe rubber and the antioxidant 1,2-dihydro-2,2,4-trimethyl-quinoline (TMQ) to the Marshall characteristics of rubber asphalt. Preparation of the rubber asphalt sample begins with making crepe rubber, which is by milling raw natural rubber in the form of a cup lump using a creeper. The crepe rubber product contains dry rubber content of more than 95%. Then the crepe rubber masticated using an open mill to soften and form it with 2 mm thickness. Then the crepe rubber is melted at 200 °C before being mixed with asphalt, heated to 165 °C. The crepe rubber content in the asphalt mixture is made 10%, and during the mixing process, the TMQ was added with contents of 0%, 1%, 2%, 3% w/w. The rubber asphalt samples were then tested for their penetration and marshall characteristics, using ASTM D5 and ASTM D6927 standards. The test results show that the addition of the TMQ can improve the penetration properties and stability of the rubber asphalt in holding the load. However, the addition of the TMQ of more than 2% causes a decrease in the rubber asphalt's stability properties. The best results were obtained by adding 2% TMQ with 68.7 dmm penetration and optimum asphalt content of 5.50%. Results of the marshall test for the sample are marshall stability 1403.96 kg, void filled aggregate (VFA) 75.90%, void in a mixture (VIM) 3.07%, void mineral aggregate (VMA) 15.34%, flow 3.370 mm, and marshall quotient (MQ) 420.8 kg/mm.

scholarly journals KARAKTERISITIK MEKANIS CAMPURAN LASTON ATAS DENGAN PENAMBAHAN SERAT KARBON

2020 ◽  
Vol 3 (3) ◽  
pp. 613
Author(s):  
Ewaldo Tanton ◽  
Anissa Noor Tajudin
Keyword(s):  
Carbon Fiber ◽  
Narrow Range ◽  
Asphalt Mixture ◽  
Test Results ◽  
Road Pavement ◽  
Directorate General ◽  
Asphalt Content ◽  
The Stability ◽  
The Cost

The increasing number of vehicles but not followed by increasing the quality of pavement will cause many roads to be damaged. One of the efforts to improve the quality of road pavement is by adding various additional ingredients. For this research the method of mixing asphalt with carbon fiber uses the Dry-Mix method, where carbon fiber is directly mixed when cooking asphalt. By using a variation of 0,1%; 0,2%; 0,3% and 0,4% carbon fiber, and with asphalt content of 5,7%. After obtaining asphalt mixture data, the research continued to determine the optimum carbon fiber content using the narrow range method. Then proceed to change the stability of Marshall into modulus then included in the KENPAVE program. Then the test results can be seen in the Nd and Nf values and the Nr value requirement of <2, which values are based on General Specifications of the Directorate General of Highways 2017 Edition. The results of this study have met all the requirements that have been set and based on the value of Nd and Nf it can be concluded that the use of carbon fiber asphalt mixture additives can be used in an effort to reduce the cost of asphalt treatment.ABSTRAKPeningkatan jumlah kendaraan namun tidak diikuti dengan peningkatan kualitas perkerasan jalan akan menyebabkan banyak jalan yang mengalami kerusakan. Salah satu upaya untuk meningkatkan kualitas perkerasan jalan adalah dengan menambahkan bahan tambah yang bervariasi. Untuk penelitian ini cara pencampuran aspal dengan serat karbon menggunakan metode Dry-Mix, dimana serat karbon secara langsung dicampurkan pada saat memasak aspal. Dengan menggunakan variasi kadar serat karbon 0,1%; 0,2%; 0,3% dan 0,4%, serta dengan kadar aspal 5,7%. Setelah didapatkan data campuran aspal penelitian dilanjutkan untuk menentukan kadar serat karbon optimum dengan metode Narrow Range. Kemudian dilanjutkan mengubah stabilitas Marshall menjadi modulus kemudian dimasukkan ke dalam program KENPAVE. Kemudian hasil pengujian tersebut dapat dilihat pada nilai Nd dan Nf dan syarat nilai Nr yaitu <2, yang dimana nilai-nilai tersebut berdasarkan Spesifikasi Umum Direktorat Jendral Bina Marga Edisi 2017. Hasil dari penelitian ini telah memenuhi seluruh syarat yang telah ditetapkan dan berasarkan nilai Nd dan Nf dapat disimpulkan bahwa penggunaan serat karbon terhadap bahan tambahan campuran aspal dapat digunakan dalam usaha mengurangi biaya perawatan aspal.

The effect of formula t-shirt method for scientists taught in science lessons in secondary schools on academic success

2020 ◽  
Vol 8 (S3) ◽  
pp. 1-10
Author(s):  
Burhan Karasu ◽  
Keyword(s):  
Academic Success ◽  
Secondary School ◽  
Item Analysis ◽  
Achievement Test ◽  
Test Results ◽  
Future Studies ◽  
Learning Techniques ◽  
Post Test ◽  
Research Findings ◽  
Experimental Group

The aim of this research is to investigate whether there is a meaningful difference in the academic success, between the students who are applied the "formula t-shirt method" (experimental group) and the students who are not (in other classes of the school), in the education for the scientists wanted to be taught in the secondary school 5th, 6th and 7th grade science textbooks. Semi-experimental method was used as research method. In the 6th grade, 27 students participated in this study as experimental group (students wearing t-shirts) and 49 students in the other classes of the school that did not participate in the study. Academic achievement test including pre-test and post-test, informative observations, students’ and teacher’s interviews as well as 20 printed t-shirts were used to collect data. The pilot study of the developed achievement test was applied in another school and also the item analysis of it was performed. According to the research findings, when the experimental group’s success post-test results from the application performed, were examined in line with the interviews, significant differences were observed. It was seen that the subjects aimed to be gained with the formula t-shirt method, were adopted by the students and also increased their success. Looking at the results of the research, thanks to wearing the t-shirts prepared by using the human body on the background, and the reconciliation of the students wearing with the scientists on t-shirts, the desired learning was provided. This also contributed to such learning techniques as peer learning, active learning, social learning in terms of visuality and integrity. It is thought that these materials developed with the formula t-shirt method, will also inspire researchers for future studies in terms of their usability in other fields and subjects

THE EFFECT OF ONLINE VIDEO BLOG ON STUDENTS’ ACHIEVEMENT OF PASSIVE VOICE IN 4J OPERATION KENDARI

2020 ◽  
Vol 5 (2) ◽  
pp. 125
Author(s):  
Raden Alifian Setiawan ◽  
Hanna Hanna ◽  
Alberth Alberth
Keyword(s):  
Data Analysis ◽  
Real World ◽  
T Test ◽  
Test Design ◽  
Online Video ◽  
Test Results ◽  
Multiple Choice Questions ◽  
Passive Voice ◽  
Paired Sample ◽  
Post Test

The use of videos in education makes it possible to overcome practical real-world constraints and explore far greater possibilities provided by digital spaces, especially for the video uploaded in online platform such as blog. This study examines whether online video blog as media have a significant effect on students’ achievement of passive voice. It used pre-experimental (one group pre-test and post-test) design. The samples of this study were 10 students at 4J Operation. A pre-test and post-test were conducted by using multiple choice questions as the instruments. Data analysis was through paired-sample t-test. Results showed that there was an increase in mean score of pre-test (49,1) and post-test (63,5). Data from Paired Sample t-test showed that Sig. (2-tailed) was 0.000 which was smaller than .05 which means that there was significance difference in mean score after employing treatment.

scholarly journals Diagnostic accuracy of clinical tests for cam or pincer morphology in individuals with suspected FAI syndrome: a systematic review

2020 ◽  
Vol 6 (1) ◽  
pp. e000772 ◽  
Author(s):  
Rahel Caliesch ◽  
Martin Sattelmayer ◽  
Stephan Reichenbach ◽  
Marcel Zwahlen ◽  
Roger Hilfiker
Keyword(s):  
Systematic Review ◽  
Diagnostic Accuracy ◽  
Index Test ◽  
Test Results ◽  
Clinical Tests ◽  
Negative Test ◽  
Post Test ◽  
Pincer Morphology ◽  
Fai Syndrome ◽  
Quality Evidence

ObjectivesTo determine the diagnostic accuracy of clinical tests for cam or pincer morphology in individuals with suspected femoroacetabular impingement (FAI) syndrome and to evaluate their clinical utility.DesignA systematic review of studies investigating the diagnostic accuracy of clinical tests for cam and pincer morphology.Data sourcesPubMed, Embase, CINAHL and SPORTDiscus.Eligibility criteria for selecting studiesStudies investigating the diagnostic accuracy of clinical tests for cam, pincer or mixed morphology in symptomatic patients. Patients had to undergo an index test and a reference test able to identify cam or pincer morphology. Study results have to allow the calculation of true or false positives and/or negatives to calculate sensitivity, specificity, likelihood ratios (LR) and post-test probabilities.ResultsEight studies were included, investigating 17 tests and two test combinations. The studies reported a low specificity for all tests, ranging from 0.11 to 0.56. Sensitivity ranged from 0.11 to 1.00, with high sensitivities for the flexion-adduction-internal rotation (FADIR), foot progression angle walking (FPAW) and maximal squat tests. We estimated that negative test results on all of these three tests would result in a negative LR of 0.15. However, we judged the studies to provide low-quality evidence.ConclusionThere is low-quality evidence that negative test results reduce the post-test probability of cam or mixed morphologies and that consecutive testing with the FADIR, FPAW and maximal squat tests might be used as a clinical test combination. We would not recommend their use to confirm the diagnosis of FAI syndrome.PROSPERO registration numberCRD42018079116.

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