Effects of Compaction Temperature and Effort on the Engineering Properties of Asphalt Concrete Mixtures

2008 ◽  
pp. 48-48-19 ◽  
Author(s):  
TW Kennedy ◽  
FL Roberts ◽  
RB McGennis
Keyword(s):  
Asphalt Concrete ◽  
Engineering Properties ◽  
Compaction Temperature ◽  
Concrete Mixtures

Image Analysis Evaluation of Aggregates for Asphalt Concrete Mixtures

1998 ◽  
Vol 1615 (1) ◽  
pp. 65-71 ◽  
Author(s):  
Chun-Yi Kuo ◽  
Reed B. Freeman
Keyword(s):  
Image Analysis ◽  
Asphalt Concrete ◽  
Morphological Characteristics ◽  
Engineering Properties ◽  
Natural Sand ◽  
Coarse Aggregates ◽  
Concrete Mixtures ◽  
Fine Aggregates ◽  
Pavement Engineering ◽  
Recent Developments

The performance of asphalt concrete mixtures is influenced by the properties of the included aggregates, such as grading, shape (angularity and elongation), and texture (roughness). Complete and accurate quantification of aggregate properties is essential for understanding their influence on asphalt concrete and for selecting aggregates to produce high-quality paving mixtures. Recent developments in the use of digital image analysis techniques for quantifying aggregate morphological characteristics in asphalt concrete are summarized. Image morphological characteristics were used to quantify flatness and elongation of coarse aggregates, to estimate the proportion of natural sand in fine aggregates, and to correlate aggregate characteristics with engineering properties of asphalt concrete mixtures. Image analysis of sections also revealed information about the grading, shape, and orientation of coarse aggregates in a mixture. An overview is presented of the broad range of useful pavement engineering applications of this relatively new approach for evaluating aggregate characteristics.

scholarly journals Chemical recycling of polyethylene terephthalate (waste water bottles) for improving the properties of asphalt mixture

2018 ◽  
Vol 162 ◽  
pp. 01042 ◽  
Author(s):  
Mohammed Alzuhairi ◽  
Ahmed Al-Ghaban ◽  
Shams Almutalabi
Keyword(s):  
Polyethylene Terephthalate ◽  
Asphalt Concrete ◽  
Asphalt Mixture ◽  
Mix Design ◽  
Engineering Properties ◽  
Chemical Recycling ◽  
Air Voids ◽  
Concrete Mixtures ◽  
Penetration Tests ◽  
Property Modification

One of the most prevalent of waste materials is Polyethylene Terephthalate (PET) which is used mainly to produce the drinking water bottles. In this research, the waste plastic bottles, which are normally made from PET was used to investigate the possibility of using this material as an additive in asphalt concrete mixtures. Six different proportions (w/w %) of Degradated Polyethylene Terephthalate (DPET) (2, 4, 6, 8, 10, and 12%) have been added to bitumen to prepare the specimens. The tests include Marshall Method of mix design and coating with asphalt. The results indicated that the mixture property modification increased as the content of (DPET) increases. This additive gives maximum flexibility and rigidity of the asphalt, according to ductility and penetration tests. Marshall Method gives better resistance against permanent deformations and better engineering properties in terms of stability, flow value, air voids and water absorption comparing with non-modified mixtures.

scholarly journals Impact of the Superpave hot mix asphalt properties on its permanent deformation behavior

2018 ◽  
Vol 162 ◽  
pp. 01041
Author(s):  
Zahra Qasim ◽  
Alaa Abed ◽  
Zaynab Qasim
Keyword(s):  
Asphalt Concrete ◽  
Permanent Deformation ◽  
Asphalt Mixtures ◽  
Asphalt Pavements ◽  
Compaction Temperature ◽  
Factors Affecting ◽  
Concrete Mixtures ◽  
Pavement Performance Prediction ◽  
Wheel Tracking ◽  
Sbs Modified Asphalt

In Iraq, the severity of rutting has increased in asphalt pavements possibly due to the increase in truck axle loads, tyre pressure, and high pavement temperature in summer. As of late, Superpave has been accounted as an enhanced system for performance based design, analysis of asphalt pavement performance prediction for asphalt concrete mixes. In this research the development of permanent deformation in asphalt concrete under repeated loadings was investigated, Wheel-Tracking apparatus has been used in a factorial testing program during which 44 slab samples were tested to simulate actual pavement. The objectives of the present research include; investigating the main factors affecting rutting in asphalt concrete mixture, quantifying the effect of SBS polymer and steel reinforcement on asphalt concrete mixtures in addition to studying the effect of variables on the asphalt concrete mixes against moisture sensitivity. It has been determined that that increasing of compaction temperature from 110 to 150°C will decrease the permanent deformation by 20.5 and 15.6 percent for coarse and fine gradation control asphalt mixtures, respectively. While the permanent deformation decreases by 21.3 percent when the compaction temperature is increased from 110 to 150°C for coarse gradation SBS modified asphalt mixtures.

scholarly journals VARIASI SUHU PEMADATAN PADA CAMPURAN BETON ASPAL MENGGUNAKAN BAHAN TAMBAH ANTI STRIPPING

2019 ◽  
Vol 1 (1) ◽  
pp. 12-20
Author(s):  
Anni Susilowati ◽  
Eko Wiyono
Keyword(s):  
Asphalt Concrete ◽  
Density Level ◽  
Compaction Process ◽  
Temperature Variations ◽  
Compaction Temperature ◽  
Testing Method ◽  
Concrete Mixtures ◽  
Independent Variable ◽  
Asphalt Content ◽  
Mineral Aggregates

Suhu pemadatan merupakan faktor yang sangat penting dalam proses pemadatan karena mempengaruhi tingkat kepadatan campuran beton aspal. Penelitian ini menggunakan bahan aditif Wetfix Be, yang merupakan bahan kimia anti stripping  berguna untuk meningkatkan ikatan dan menstabilkan campuran antara agregat dan aspal terutama pada musim hujan. Tujuan penelitian untuk mendapatkan nilai properties Marshall dengan berbagai variasi suhu pemadatan dan menentukan suhu pemadatan yang optimum pada campuran beton aspal dengan menggunakan bahan tambah anti stripping. Variabel bebas pada penelitian ini adalah variasi suhu pemadatan pada pembuatan beton aspal  yaitu 700C, 900C, 1100C, 1300C, dan 1500C, dengan Kadar Aspal Optimum (KAO) 0,6%, dan Wetfix Be 0,3% terhadap kadar aspal optimum. Metode pengujian menggunakan Marshall berdasarkan SNI 06-2489-1991. Hasil penelitian menunjukkan bahwa penambahan suhu pemadatan pada aspal beton dapat meningkatkan nilai kepadatan, % Rongga Terisi Aspal, Stabilitas, dan Marshall Quotient serta menurunkan  % rongga di antara agregat, % rongga dalam campuran dan kelelehan. Didapat rentang Suhu pemadatan yang masih memenuhi parameter Marshall pada suhu 120°C sampai dengan 160°C. Adapun nilai suhu optimum pemadatan untuk campuran beton aspal yang sebesar 140°C, dengan nilai VMA 18,10%, VFB 73,09%, VIM 4,88 %, Stabilitas 1228,28 kg, kelelehan 3,93 mm dan MQ 362,14 kg/mm, memenuhi spesifikasi Bina Marga 2010.Kata kunci: Anti Stripping, Suhu, Pemadatan, Wetfix BeCompaction temperature is a very important factor in the compaction process because it affects the density level of asphalt concrete mixtures. This research uses Wetfix Be additive material, which is an anti-stripping chemical which is useful to increase bonding and stabilize the mixture between aggregates and asphalt, especially in rainy seasons. The aim of the study was to obtain Marshall properties with compaction temperature variations and determine the optimum compaction temperature in asphalt concrete mixtures using added anti-stripping materials. The independent variable in this study is the compaction temperature variations in asphalt concrete manufacturing is 70°C, 90°C, 110°C, 130°C, and 1500C with optimum asphalt content (OAC) of 6%, and Wetfix Be of 0.3% against optimum asphalt content. Testing method using Marshall based on SNI 06-2489-1991. The results showed that the addition of the compaction temperature on concrete asphalt could increase the density value, percentage of the voids filled with asphalt, stability, and Marshall quotient; and reduce the voids in the mineral aggregates, % voids in the mixture and flow. The compaction temperature range obtained which still meets Marshall Parameters was from 120°C to 160°C. The optimum compaction temperature value for asphalt concrete mixtures were 140 ° C, with VMA values of 18.10%, VFB 73.09%, VIM 4.88%, stability of 1228.28 kg, flowing of 3.93 mm and MQ of 362,14 kg/mm which meet the specifications of Bina Marga 2010.Keywords: Anti-Stripping, Compaction Temperature, Wetfix Be

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