Asphalt Pavement Temperature Profile for Tropical Climate in Indonesia

2015 ◽  
Vol 776 ◽  
pp. 17-23 ◽  
Author(s):  
I. Made Agus Ariawan ◽  
B.S. Subagio ◽  
B.H. Setiadji

Environmental and climatic factors directly affect the temperature of asphalt pavement layers. Air temperature is one of the most important environmental factors that significantly affect the temperature distribution profile of asphalt pavement layers. It is important therefore, to comprehend the asphalt strength characteristics because of the differences in asphalt pavement designs. This study was conducted in ​​tropical area with high humidity in Indonesia. A testing method was carried out to measure both temperature and humidity using thermocouples equipped with data logger and an application program of SAGA Technology. Measurements were taken for consecutive seven sunny days in July 2014. The average values obtained ​​for hourly air temperature and humidity were ranging from 24.92 to 36.98 °C and from 50.31 to 83.69% respectively. Meanwhile, pavement surface temperatures measured at 0, 20 and 65 millimeters depths were varied from 25.29 to 45.65 °C, from 25.37 to 43.59 °C, and from 26.70 to 38.54 °C respectively. Both air and asphalt pavement temperatures are sharply increased from 10:00 a.m. to 02:00 p.m. and are gradually decreased afterward.

2020 ◽  
Vol 2020 ◽  
pp. 1-6 ◽  
Author(s):  
Xin Su ◽  
Yong Lai ◽  
Yan Liu ◽  
Daoxun Ma ◽  
Peng Wang

In the paper, the method of deicing and melting snow by the carbon fiber heating wire (CFHW) embedded in the airport asphalt pavement is proposed to improve the security of airport operation. The field experiment of deicing and melting snow on the airport asphalt pavement is conducted. Deicing and melting snow, asphalt pavement temperature, ice-free area ratio, and snow-free area ratio are analyzed. Electrical power with 350 W/m2 is input to the airport asphalt pavement for deicing and melting snow by the CFHW. In the experiment, 3 mm ice can be melted, and the average infrared ray temperature (IRT) of the airport asphalt pavement surface can achieve an increment of 13.0°C in 2.5 hours when the air temperature is from −7.5°C to −2.2°C. Snow with 3.2 mm precipitation can be melted in 2 hours when the air temperature is from −4.8°C to −3.5°C, and the asphalt pavement temperature can achieve an increment of 5.9°C at the depth of 0.5 cm. The results show that the method of deicing and melting snow on the airport asphalt pavement by the CFHW is practicable in the cold zone.


Author(s):  
Amani Al-Kalbani ◽  
Siham G. Farag

Asphalt pavement is form an integral part of any transportation system. Temperature is the significant factor that effect on the performance and life span of a pavement. This paper study the relationship between the air temperature and asphalt pavement temperature and using Excel in order to predicate surface asphalt pavement model for Muscat climate. The models were compared with the standard models SHRP and LTPP models [3]. The development models resulted the surface pavement temperature was taken more time in heating cycle than air temperature. When compared the air temperature and surface asphalt pavement temperature with the standards models SHRP and LTPP models. There was difference between them due to the standards models was design for low temperature under zero where in Muscat temperature cannot be under zero [2].


2018 ◽  
Vol 7 (1) ◽  
pp. 135
Author(s):  
I Putu Tantra Ardika ◽  
Yohanes Setiyo ◽  
Sumiyati .

Tujuan dari penelitian ini adalah untuk (1) mengetahui profil iklim mikro pada naungan plastik dengan warna plastik berbeda dan (2) mengetahui warna plastik untuk naungan yang sesuai terhadap peningkatan kualitas kentang varietas granola G0. Penelitian ini menggunakan rancangan acak lengkap masing-masing terdiri dari empat perlakuan dan tiga ulangan, yaitu perlakuan tanpa naungan, perlakuan naungan plastik warna bening, perlakuan naungan plastik warna biru dan perlakuan naungan plastik warna merah. Untuk pengukuran iklim mikro digunakan alat temperature and humidity meter dan light meter. Pengukuran iklim mikro dilakukan seminggu sekali yaitu setiap pukul 12.00 WITA. Analisis data intensitas cahaya matahari dilakukan membuat gambar dalam naungan menggunakan metose garis kontur, sedangkan data hasil pengukuran suhu udara, suhu tanah, kelembaban dan variabel kualitas yang diperoleh diolah dengan menggunakan program komputer Microsoft Excel untuk memperoleh grafik, lalu dianalisis dengan metode deskiptif, dan dilanjutkan analisis menggunakan analisis sidik ragam (ANOVA). Hasil penelitian intensitas cahaya matahari menunjukkan kontur profil saat tanaman berusia 2 minggu profil sebaran naungan warna bening 975-1025 lux, naungan warna merah 675-725 lux, naungan warna biru 575-595 lux, sedangkan pada tanaman berusia 8 minggu naungan warna bening 100-800 lux, naungan warna merah 100-700 lux, dan naungan warna biru 100-400 lux. Rata-rata suhu udara tanpa naungan 26,20C, naungan bening 26,80C, naungan merah 26,60C, naungan biru 26,20C. Rata-rata kelembaban tanpa naungan 76%, naungan bening 77%, naungan merah 78%, naungan biru 79%. Perlakuan naungan bening menunjukkan kualitas terbaik yaitu rata-rata 4,4 umbi per pohon, rata-rata berat 257,6 gram per pohon dan rata-rata 1 umbi per pohon. Kata kunci: naungan plastik, kentang varietas granola G0, iklim mikro. The purpose of this study was to (1) determine the microclimate profile of plastic shade with different plastic colors and (2) find out the color of plastic for the appropriate shade to increase the quality of granola G0 potato varieties. This study used a completely randomized design, each consisting of four treatments and three replications, namely treatment without shade,  transparent plastic shade treatment, blue plastic shade treatment and red plastic shade treatment. For microclimate measurement, the temperature and humidity meter and light meter are used. Microclimate measurement is done once a week, which is at 12.00 p.m. Analysis of sunlight intensity data was carried out to make profile image in the shade using metose contour lines, while the results of measurements of air temperature, soil temperature, humidity and quality variables obtained were processed using a Microsoft Excel computer program to obtain graphics, then analyzed using the deskiptive method and continued the analysis using variance analysis (ANOVA). The result of the intensity of sunlight is made profile countur, and the result of measurement of air temperature, soild temperature, moisture and variable quality is made graph. The results of the study of solar light intensity show the contour of the profile when the plant is two weeks old, the clear shade distribution profile is 975-1025 lux, the shade is read 675-725 lux, the shade is blue 575-595 lux, while in the eight week old plant, the clear shade is 100-800 lux, the shade is red 100-700 lux, and the shade is blue 100-400 lux. Average air temperature without shade 26,20C, clear shade 26,80C, red shade 26,60C, blue shade 26,20C, average moisture without shade 76%, clear shade 77%, red shade 78%, and blue shade 79%. The treatment of clear shade shows the best quality, that is an average of 4,4 tubers every single tree, average 257,6 grams every single tree and average of 1 tuber every single tree.   Keyword : plastic sharps, potatoes varietas granola G0, microclimate  


2012 ◽  
Vol 511 ◽  
pp. 12-15 ◽  
Author(s):  
Zhuo Hong Cong ◽  
Nan Xiang Zheng ◽  
Yan Jin

In order to choose asphalt reasonably, the asphalt pavement performance zone at Liupanshan area of Ningxia was studied according to 30 years’ climate datum. According to the statistics analysis of 30 years’ air temperature and field temperature in the hottest and coldest month, it was suggested that: the high design pavement temperature should be determined according to the average high field temperature in seven consecutive days with 98% reliability, the low design pavement temperature should be determined according to the lowest field temperature of a year with 98% reliability. This method was applied at Liupanshan area to decide the asphalt pavement’s temperature field, which was in accordance with Liupanshan area’s conditions


Author(s):  
Erland O. Lukanen ◽  
Chunhua Han ◽  
Eugene L. Skok

The Strategic Highway Research Program, conducted in the United States and Canada from 1987 to 1992, included a significant asphaltic concrete study. The study included a new grading method for asphalt binders, performance grading, resulting in what is termed PG asphalt. The grade selection process is based on air temperature distribution. Since 1994, the Long-Term Pavement Performance program has established a seasonal monitoring program that consists of a number of sites with air and pavement temperature sensors and a data logger that records the air and pavement temperatures hourly. These data are now available for prediction of the extreme temperatures that are needed for the selection of the appropriate PG asphalt binder. On the basis of the review of the recent pavement temperature studies and statistical analysis of the pavement temperature data available, an empirical prediction model has been developed from the original data set and validated from the expanded data set. The model is compared with existing prediction relationships including the heat flow model. Pavement prediction data and climatic data on high and low temperature from weather stations are used to calculate the probability that a specific asphalt temperature will be exceeded. Variations both in prediction and in annual maximum or minimum air temperature are assumed to be independent and considered in the calculation. The reliability contours for a given PG grade are presented as a convenient tool to the asphalt binder selection.


2012 ◽  
Vol 209-211 ◽  
pp. 376-379 ◽  
Author(s):  
Yu Hui Di ◽  
Jing Jiang

Through an actual test of the planting on the roof, observes the main climatic factors of roof surfaces about the the grass layer of green roof and the concrete roof.Study and analysis the variation of the temperature and the relative humidity of surface temperature and the air inside and outside during the daytime. Studies have shown that the application of green roof can change the temperature and humidity to decrease the temperature of the roof surface.Thereby reduces the indoor air temperature and drop the outdoor local relative humidity.


2019 ◽  
Vol 1 (2) ◽  
Author(s):  
Hanifa Marisa

An investigation had been done to Tetragonula (Tetragona) sp nest at Indralaya, South Sumatra to describe the Tetragonula sp nest that use streetlight pole as nest medium during April - May 2019. Purpossive sampling is used to select the target nest. Two streetlight pole found be used by Tetragonula sp as their home. The coordinate of location, heght from ground surface, diameter of streetlight pole, air temperature and humidity, and floral species around nest, were noted. Spot coordinate are S 30 14’ 19.2498’’ and E 1040 39’ 15,3288’’ ; 1,5 m above the ground surface, 12 cm diameter pole, highest air temperature was 35 o C at daylight (April and May 2019), 80 – 90 % humidity at April-May 2019; which Switenia macrophyla, Hevea brasiliensis, Zea mays, and Citrullus lanatus floral species are planted around. Air temperature in the pole is very high, around 40 0 C during daylight.


2002 ◽  
Vol 82 (3) ◽  
pp. 499-506 ◽  
Author(s):  
Zakaria M Sawan ◽  
Louis I Hanna ◽  
Willis L McCuistion

The cotton plant (Gossypium spp.) is sensitive to numerous environmental factors. This study was aimed at predicting effects of climatic factors grouped into convenient intervals (in days) on cotton flower and boll production compared with daily observations. Two uniformity field trials using the cotton (G. barbadense L.) cv. Giza 75 were conducted in 1992 and 1993 at the Agricultural Research Center, Giza, Egypt. Randomly chosen plants were used to record daily numbers of flowers and bolls during the reproductive stage (60 days). During this period, daily air temperature, temperature magnitude, evaporation, surface soil temperature, sunshine duration, humidity, and wind speed were recorded. Data, grouped into intervals of 2, 3, 4, 5, 6, and 10 d, were correlated with cotton production variables using regression analysis. Evaporation was found to be the most important climatic variable affecting flower and boll production, followed by humidity and sunshine duration. The least important variables were surface soil temperature at 0600 and minimum air temperature. The 5-d interval was found to provide the best correlation with yield parameters. Applying appropriate cultural practices that minimize the deleterious effects of evaporation and humidity could lead to an important improvement in cotton yield in Egypt. Key words: Cotton, flower production, boll production, boll retention


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