scholarly journals Evaluation of stiffness to predict rutting resistance of hot-mix asphalt: a Canadian case study

2014 ◽  
Vol 9 (4) ◽  
pp. 283-296
Author(s):  
Md Safiuddin ◽  
Susan Louise Tighe ◽  
Ludomir Uzarowski
Keyword(s):  
Regression Analysis ◽  
Dynamic Modulus ◽  
Hot Mix Asphalt ◽  
Resilient Modulus ◽  
Design Method ◽  
Strong Relationship ◽  
Dynamic Moduli ◽  
Rutting Resistance ◽  
The Relationship ◽  
French Laboratory

This paper investigates the relationship between the stiffness and rutting resistance of hot-mix asphalt. Ten different types of hot-mix asphalt were examined. The Superpave mix design method was utilized to produce nine mixes; the remaining mix was designed using the Marshall method. The asphalt mixes were tested for stiffness and rutting resistance under the Centre for Pavement and Transportation Technology research program at the University of Waterloo. The stiffness was determined by the laboratory resilient and dynamic moduli tests. The dynamic modulus test was conducted at six different loading frequencies and five different temperatures. The rutting test was executed by the Hamburg Wheel Rut Tester and the French Laboratory Rutting Tester to obtain rutting depth. The regression analysis was performed to examine the relationships of resilient and dynamic moduli with rutting depth. The results of the regression analysis revealed that resilient modulus did not correlate well with rutting depth. In contrast, dynamic modulus showed strong correlation with rutting depth for a number of loading frequencies and temperatures. The strong relationship was observed at the higher temperatures of +46.1 oC and +54.4 oC. Moreover, the relationship between dynamic modulus and rutting depth was better for lower loading cycles/wheel passes applied in the rutting test. It was also noticed that dynamic modulus exhibited a better relationship with rutting depth obtained from the French Laboratory Rutting Tester. The overall findings indicate that the dynamic moduli obtained at 0.1–1.0 Hz and +46.1–(+54.4) oC are useful to predict the rutting resistance of hot-mix asphalt.

scholarly journals Performance Evaluation of Hot Mix Asphalt with Different Proportions of RAP Content

2018 ◽  
Vol 34 ◽  
pp. 01026
Author(s):  
Ahmad Kamil Arshad ◽  
Haryati Awang ◽  
Ekarizan Shaffie ◽  
Wardati Hashim ◽  
Zanariah Abd Rahman
Keyword(s):  
Hot Mix Asphalt ◽  
Resilient Modulus ◽  
Design Method ◽  
Asphalt Pavement ◽  
Cost Savings ◽  
Volumetric Analysis ◽  
Public Works ◽  
Asphalt Binders ◽  
Moisture Susceptibility ◽  
Asphalt Mixes

Reclaimed Asphalt Pavement (RAP) is old asphalt pavement that has been removed from a road by milling or full depth removal. The use of RAP in hot mix asphalt (HMA) eliminates the need to dispose old asphalt pavements and conserves asphalt binders and aggregates, resulting in significant cost savings and benefits to society. This paper presents a study on HMA with different RAP proportions carried out to evaluate the volumetric properties and performance of asphalt mixes containing different proportions of RAP. Marshall Mix Design Method was used to produce control mix (0% RAP) and asphalt mixes containing 15% RAP, 25% RAP and 35% RAP in accordance with Specifications for Road Works of Public Works Department, Malaysia for AC14 dense graded asphalt gradation. Volumetric analysis was performed to ensure that the result is compliance with specification requirements. The resilient modulus test was performed to measure the stiffness of the mixes while the Modified Lottman test was conducted to evaluate the moisture susceptibility of these mixes. The Hamburg wheel tracking test was used to evaluate the rutting performance of these mixes. The results obtained showed that there were no substantial difference in Marshall Properties, moisture susceptibility, resilient modulus and rutting resistance between asphalt mixes with RAP and the control mix. The test results indicated that recycled mixes performed as good as the performance of conventional HMA in terms of moisture susceptibility and resilient modulus. It is recommended that further research be carried out for asphalt mixes containing more than 35% RAP material.

EMPIRICAL STUDY OF FEDERALISM AND POLITICAL STABILITY IN NIGERIA

2019 ◽  
Vol 6 (2) ◽  
pp. 177-196
Author(s):  
Ugo Chuks Okolie
Keyword(s):  
Regression Analysis ◽  
Linear Regression Analysis ◽  
Political Stability ◽  
Strong Relationship ◽  
Ethnic Violence ◽  
Survey Method ◽  
Questionnaire Data ◽  
Pearson Product Moment Correlation ◽  
The Relationship ◽  
Structured Questionnaire

Federalism and Political stability are two concepts that are of significance to all modern societies. Federalism promotes pluralism and dispersal of power which is good for a multi-ethnic society like Nigeria. But in Nigeria, the practice has generated unending tensions among the individuals, communities and ethnic groups within it. However, this study argues that healthy federalism is a political panacea for ethnic violence, governance crisis and political instability in Nigeria. This study empirically examined the relationship between federalism and political stability in Nigeria. The study adopted a descriptive and casual research design as well as the survey method. In the investigation, a total of 428 respondents were sampled using a structured questionnaire. Data were analyzed using Pearson product-moment correlation and linear regression analysis. Findings revealed that federalism has a positive and significant relationship with political stability in Nigeria at (R = .732, R2 = 614 at p = 0.000). The statistical result shows that there is a strong relationship between federalism and political stability in Nigeria and that federalism accounts for 61.4% of variations in political stability in Nigeria. Requisite conclusions and recommendations were provided in the light of empirical and theoretical findings.

scholarly journals INVESTIGATION ON INDICES OF WORKABILITY AND RUTTING RESISTANCE FOR WEARING COURSE MIXTURES

2017 ◽  
Vol 12 (1) ◽  
pp. 30-37 ◽  
Author(s):  
Tran Thanh Nhat ◽  
Osamu Takahashi
Keyword(s):  
Hot Mix Asphalt ◽  
Asphalt Mixture ◽  
Energy Parameter ◽  
Resistance Index ◽  
Strong Relationship ◽  
Maximum Density ◽  
Asphalt Mixtures ◽  
Rutting Resistance ◽  
Gyratory Compaction ◽  
Index Value

Simple indices easily help to evaluate a performance of hot mix asphalt mixtures. This study aimed to develop a simple workability index and rutting resistance index for wearing course mixtures. Seven aggregate gradations were prepared to investigate dense, coarse, and fine-graded hot mix asphalt mixtures. The study used the Marshall compactor to fabricate specimens. The Superpave Gyratory Compaction was employed to measure the workability of the seven blends, namely the workability energy parameter of asphalt mixtures. The study also conducted Wheel Tracking Test to evaluate rutting resistance of those mixtures. The results showed a strong relationship between the workability index and the workability energy of hot mix asphalt mixtures, namely increasing the workability energy of mixtures with increasing the workability index value. The workability energy value of an asphalt mixture may be high when the area of continuous maximum density for a proportion of stone, which illustrates a degree of far away from the Fuller maximum density line, is low. Moreover, the rutting resistance index correlated well with rutting resistance of the hot mix asphalt mixtures.

scholarly journals CORRELATION OF SAFETY PERCEPTIONS AND SAFETY BEHAVIOR IN UNIVERSITY TEACHING LABORATORY

2020 ◽  
Vol 20 (Special1) ◽  
pp. 1-5
Author(s):  
Rahmat N ◽  
Nur Annisa F ◽  
Muhammad D ◽  
Muhammad H
Keyword(s):  
Regression Analysis ◽  
Strong Relationship ◽  
University Teaching ◽  
Safety Behavior ◽  
Teaching Laboratory ◽  
Safety Perceptions ◽  
Unsafe Behavior ◽  
And Behavior ◽  
The University ◽  
The Relationship

Chemicals usage has been reported as the cause of accidents in a laboratory. Those accidents have caused many injuries, even fatality in many sectors, one of which happened in the University Teaching Laboratory. Accidents usually happen because of unsafe behavior, while unsafe behavior is caused by bad safety perceptions. This paper investigates the correlation of perceptions and behavior in University Teaching Laboratory. The result measured by regression analysis to find out the relationship between two variables showed that there is a strong relationship between perceptions and behavior. Therefore, safe behavior can be created through creating good perception.

scholarly journals ANALISIS EFEKTIVITAS DAN KONTRIBUSI PAJAK DAERAH TERHADAP PENDAPATAN ASLI DAERAH KABUPATEN KENDAL TAHUN 2014-2018

2020 ◽  
Vol 3 (1) ◽  
pp. 65
Author(s):  
Deni Ariyanti ◽  
Resi Yudhaningsih
Keyword(s):  
Regression Analysis ◽  
Data Collection ◽  
Correlation Analysis ◽  
Strong Relationship ◽  
Know How ◽  
Local Revenue ◽  
Local Taxes ◽  
The Relationship ◽  
Positive Results ◽  
Collection Methods

<p><em>This research was conducted to find out how much the effectiveness and contribution of regional taxes on Regional Original Revenue (PAD), as well as to know how the relationship between local taxes and Kendal Regency Regional Revenue (PAD). Data collection methods used are interviews and documentation. The writing method used is description and exposition. The result of the discussion is that the level of local tax effectiveness is very effective with an average of 126.49%, the criteria for regional tax contribution to regional original income are quite good with an average of 30.47%, the results of regression analysis show positive results which means the growth in number Regional Tax revenues will result in the growth of Regional Original Income, and the results of the correlation analysis show that the regional tax on Kendal District Original Revenue (PAD) has a very strong relationship with a coefficient r of 0.89 so that if the local tax increases then the Local Revenue Kendal Regency will alsoincrease.</em><br /><em>Keywords: Regional Taxes, Regional Original Revenue, Effectiveness, and Contributions.</em></p>

scholarly journals Effect of Sodium Chloride on the Modulus and Fatigue Life of Bituminous Mixtures

Materials ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2126
Author(s):  
Luis Juli-Gándara ◽  
Ángel Vega-Zamanillo ◽  
Miguel Ángel Calzada-Pérez ◽  
Evelio Teijón-López-Zuazo
Keyword(s):  
Fatigue Life ◽  
Sodium Chloride ◽  
Dynamic Modulus ◽  
Hot Mix Asphalt ◽  
Resilient Modulus ◽  
Salt Water ◽  
Decisive Role ◽  
Bituminous Mixture ◽  
Bituminous Mixtures ◽  
Reference Mixture

Bituminous mixtures are not perfectly elastic materials, so their viscoelastic properties play a decisive role in knowing their behavior. This research aims to find out this behavior through the values of the resilient modulus, the dynamic modulus, and the fatigue life for asphalt concrete and porous mixtures when they are influenced by the presence of salt (NaCl, sodium chloride). The aforementioned influence of salt has been evaluated by utilizing three different methods: submerging specimens of bituminous mixture in salt water; introducing salt into the specimens as if it was aggregate and immersing the aggregate in salt water; and drying it and then manufacturing the bituminous mixture with it. As the results indicate, the mixtures submerged in salt water do not show large differences in comparison to the reference mixtures for hot mix asphalt and porous mixtures. However, for hot mix asphalt in which salt has been added as aggregate, the resilient modulus is greater than in the reference mixture. For the bituminous mixtures in which an aggregate saturated in salt water has been used for its manufacture, the results of the resilient modulus test, dynamic modulus test, and fatigue life test are lower than in the reference mixture, especially when the specimens are submerged.

scholarly journals Population Analysis (Total Weight, CaCO3 Total Weight and Segment Numbers) of Halimedaopuntia (Linn.) Lamouroux in Tongkeina Waters, Manado

2016 ◽  
Vol 3 (2) ◽  
pp. 68
Author(s):  
Kristianto Parera ◽  
Rene Charles Kepel ◽  
Alex D. Kambey
Keyword(s):  
Regression Analysis ◽  
Population Analysis ◽  
Strong Relationship ◽  
Total Weight ◽  
Line Transect ◽  
Caco3 Content ◽  
Wet Weight ◽  
Line Transects ◽  
Relationship Of ◽  
The Relationship

This study were aiming to know the biological aspects of H. opuntia in term of its total wet weight, CaCO3total weight and segment numbers and relationship of segment numbers with total weight (wet and CaCO3 content). Data collection was conducted in June, 2015 and samples were taken during the day light during the low tides. Line transect and quadrate of 1 x 1 meter were used in this study. In total there are 3 line transects of50 meter in length with 25 meter distant apart of each transect and were deployed perpendicular toward coastal line. To reveal the variation on total wet weight, CaCO3 wet content and segment numbers the data were plotted on bar diagram. The regression analysis and analysis of variance also were used to reveal the relationship among the parameters measured. The result of the study are as follow:  total individuals are 215 with composition of 76 individuals in transect 1; 66 individuals in transect 2 and 73 individuals in transect 3; total wet weight: 1,259.429 gram;  total weight of CaCO3: 354.551 gram; and segment numbers 82.580. The result of regression analysis shows that there is a strong relationship between number of segment and CaCO3 wet content. Keyword : Population Analysis, Halimeda opuntia   ABSTRAK   Tujuan dari penelitian ini adalah untuk mengetahui berat basah total, berat kapur total dan  jumlah segmen total serta hubungan jumlah segmen total dengan berat basah total dan hubungan jumlah segmen total dengan berat kapur total dari Halimeda opuntia. Penelitian ini dilakukan di perairan Tongkaina Kota Manado pada bulan Juni 2015.  Pengambilan sampel dilakukan pada siang hari pada saat keadaan air laut surut dengan menggunakan metode transek dan kuadrat dengan ukuran 1 x 1 meter.  Pengambilan sampel dibagi atas 3 transek dengan masing-masing transek terdiri dari 10 kuadrat dengan panjang transek masing-masing 50 m, jarak antara transek dengan lainnya 25 m dan jarak antara titik kuadrat dengan lainnya 5 m. Untuk melihat variasi ukuran berat basah total, jumlah segmen total dan berat kapur total pada sampel dari lokasi penelitian tersebut, maka dibuat diagram batang, analis hubungan dan analisis keragaman.  Hasil penelitian diperoleh 215 individu masing-masing 76 individu (transek 1), 66 individu (transek 2) dan 73 individu (transek 3).  Jumlah berat basah total yang dihitung adalah 1.259,429 gram, berat kapur total  354,551 gram dan jumlah segmen total 82.580 segmen. Hasil analisis regresi hubungan jumlah segmen menunjukan bahwa hubungan kedua variabel tersebut memiliki hubungan yang sangat kuat dan analisis regresi hubungan jumlah segmen total dan berat kapur total memiliki hubungan yang kuat. Kata kunci: Analisis Populasi, Halimeda opuntia 1Mahasiswa Program Studi MSP FPIK-UNSRAT 2Staf pengajar Fakultas Perikanan dan Ilmu Kelautan Universitas Sam Ratulangi

scholarly journals Hubungan kedisiplinan siswa terhadap hasil belajar siswa kelas VIII pada mata pelajaran PKn di SMP Negeri 1 Kabangka Kabupaten Muna

2021 ◽  
Vol 4 (2) ◽  
pp. 52
Author(s):  
La Doni ◽  
Julien Biringan ◽  
Theodorus Pangalila
Keyword(s):  
Regression Analysis ◽  
Student Learning ◽  
Learning Outcomes ◽  
Civic Education ◽  
Strong Relationship ◽  
Student Learning Outcomes ◽  
Student Discipline ◽  
Quantitative Research Methods ◽  
Class Viii ◽  
The Relationship

Masalah dalam penelitian ini dirumuskan sebagai berikut: “bagaimana hubungan kedisiplinan siswa terhadap hasil belajar siswa kelas VIII pada mata pelajaran PKn di SMP Negeri 1 Kabangka Kabupaten Muna”? Tujuan penelitian ini adalah “untuk mengetahui hubungan kedisiplinan siswa terhadap hasil belajar siswa kelas VIII pada mata pelajaran PKn di SMP Negeri 1 Kabangka Kabupaten Muna”. Metode penelitian yang digunakan adalah metode penelitian kuantitatif dengan teknik analisis regresi. Kesimpulan hasil penelitian adalah sebagai berikut: (1) Kedisiplinan siswa memiliki hubungan yang sangat kuat yakni sebesar 0,89 dengan hasil belajar siswa kelas VIII pada mata pelajaran PKn di SMP Negeri 1 Kabangka Kabupaten Muna; (2) Sumbangan atau kontribusi variabel X (kedisiplinan siswa) terhadap variabel Y (hasil belajar siswa kelas VIII pada mata pelajaran PKn di SMP Negeri 1 Kabangka Kabupaten Muna) adalah sebesar 79,21% dan sisanya 20,79% ditentukan oleh variabel lain di luar masalah penelitian; (3) Hasil analisis regresi menggambarkan bahwa persamaan regresi antara variabel X (kedisiplinan siswa) dan variabel Y (hasil belajar siswa kelas VIII pada mata pelajaran PKn di SMP Negeri 1 Kabangka Kabupaten Muna) sebagai berikut: = a + bX = 11,86 + 1,10 X; (4) Hasil analisis regresi antara variabel kedisiplinan siswa dengan hasil belajar siswa di SMP Negeri 1 Kabangka Kabupaten Muna diperoleh nilai Fhitung sebesar 102,2181, dengan taraf kepercayaan α = 0.05 dengan dk pembilang 1 dan dk penyebut 28, sehingga diperoleh Ftabel senilai 4,20. Jadi F hitung > F tabel atau F hitung = 102,2181 > F tabel = 4,20. Sesuai dengan kriteria pengujian jika F hitung > F tabel maka H0 ditolak yang berarti terima HA; dan (5) Terdapat hubungan yang signifikan kedisiplinan siswa terhadap hasil belajar siswa kelas VIII pada mata pelajaran PKn di SMP Negeri 1 Kabangka Kabupaten Muna.Kata kunci: Kedisiplinan Siswa, Hasil Belajar, Pendidikan Kewarganegaraan The relationship between student discipline and student learning outcomes in class VIII in Civics subjects at SMP Negeri 1 Kabangka Muna Regency. The problem in this study is formulated as follows: "how is the relationship between student discipline and learning outcomes of class VIII students in Civics subjects at SMP Negeri 1 Kabangka Muna Regency"? The purpose of this study was "to determine the relationship between student discipline and learning outcomes of class VIII students in Civics subjects at SMP Negeri 1 Kabangka Muna Regency". The research method used is quantitative research methods with regression analysis techniques. The conclusions of the research results are as follows: (1) Student discipline has a very strong relationship, namely 0.89 with the learning outcomes of class VIII students in Civics subjects at SMP Negeri 1 Kabangka Muna Regency; (2) The contribution or contribution of variable X (student discipline) to variable Y (class VIII student learning outcomes in Civics subjects at SMP Negeri 1 Kabangka Muna Regency) is 79.21% and the remaining 20.79% is determined by other variables in outside the research problem; (3) The results of the regression analysis illustrate that the regression equation between variable X (student discipline) and variable Y (student learning outcomes of class VIII on Civics at SMP Negeri 1 Kabangka Muna Regency) is as follows: (Y) ̂ = a + bX = 11.86 + 1.10 X; (4) The results of the regression analysis between student discipline variables and student learning outcomes at SMP Negeri 1 Kabangka Muna Regency obtained a value of Fcount of 102.2181, with a confidence level of α = 0.05 with dk numerator 1 and dk denominator 28, in order to obtain Ftable worth 4, 20. So F count> F table or F count = 102.2181> F table = 4.20. In accordance with the test criteria, if F count> F table then H0 is rejected, which means HA accepted; and (5) There is a significant relationship between student discipline and learning outcomes of class VIII students in Civics subjects at SMP Negeri 1 Kabangka Muna Regency. Keywords: Student Discipline, Learning outcomes Civic education

scholarly journals HUBUNGAN PEMBANGUNAN MANUSIA DAN PERTUMBUHAN EKONOMI DI MALUKU PADA MASA PANDEMI COVID-19

2021 ◽  
Vol 15 (4) ◽  
pp. 745-752
Author(s):  
Arnelia Palijama
Keyword(s):  
Economic Growth ◽  
Regression Analysis ◽  
Human Development ◽  
Linear Regression Analysis ◽  
Strong Relationship ◽  
Simple Linear Regression ◽  
Analysis Technique ◽  
Inferential Analysis ◽  
Per Capita ◽  
The Relationship

The economic development of a region aims to obtain high economic growth, which can encourage an increase in the income per capita of the population followed by an increase in human development. The purpose of this study was to determine the effect of economic growth on human development performance in Maluku Province during the Covid-19 pandemic period. The research uses a quantitative approach with descriptive and inferential analysis methods. Simple linear regression analysis technique was applied to determine the relationship between HDI and economic growth and mapped it on a quadrant map. The findings obtained illustrate that the HDI growth in Maluku in 2020 slowed to 0.06 percent, while economic growth contracted to 0.92 percent. There are no districts/cities whose HDI and economic growth are lower than the Maluku Province figure. Around 81 percent of districts/cities are mapped in Quadrant II (lower HDI and higher economic growth than the Maluku figure). The estimation results of the regression equation confirm a very strong relationship. The results of the study indicate that the Covid-19 pandemic has an impact on the slowdown in the HDI growth of Maluku Province in 2020.

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