Prediction of Tensile Strength of Asphalt Concrete

2012 ◽  
Author(s):  
N. Li ◽  
A. A. A. Molenaar
Keyword(s):  
Tensile Strength ◽  
Asphalt Concrete

scholarly journals Effects of Using Limestone as a Filler and Starbit E-55 Asphalt as a Binder on the Performance of AC-WC Mixture

2019 ◽  
Vol 258 ◽  
pp. 04005
Author(s):  
Faizul Chasanah ◽  
Fajariesta Arta Putra
Keyword(s):  
Tensile Strength ◽  
Asphalt Concrete ◽  
Indirect Tensile Strength ◽  
Permeability Test ◽  
Second Stage ◽  
Performance Requirements ◽  
Indirect Tensile ◽  
Asphalt Content ◽  
Properties Of Materials ◽  
Last Stage

Asphalt concrete can be made through several methods including hot mix using Starbit E-55 asphalt as a binder and limestone as filler. This research aimed to determine the feasibility of the use of limestone as filler in AC-WC mixture and to identify the effects of limestone addition on the Marshall Characteristics, Durability, Indirect Tensile Strength (ITS), and Permeability. The first stage was to test the properties of materials consisting of aggregate, asphalt, and limestone. The second stage was to determine the optimum asphalt content with 0%, 25%, 50%, 75%, and 100% filler proportions, and the last stage was to conduct the Marshall, Immersion, ITS, and Permeability tests. The results showed that limestone has been in accordance with the performance requirements specified for a filler of AC-WC mixture using Starbit E-55 asphalt as a binder. There was a change in the Marshall characteristics of optimum asphalt content. The durability increased, and the ITS values of AC-WC mixture improved along with the increase in limestone proportion. However, the permeability test indicated that the mixture has a poor drainage feature towards water after variation in filler proportions was performed.

New Class of Reactive Polymer Modifiers for Asphalt: Mitigation of Moisture Damage

2000 ◽  
Vol 1728 (1) ◽  
pp. 52-59 ◽  
Author(s):  
Glen Crossley ◽  
Simon Hesp
Keyword(s):  
Molecular Weight ◽  
Tensile Strength ◽  
Asphalt Concrete ◽  
Lower Cost ◽  
Water Immersion ◽  
Polymerization Process ◽  
Reactive Polymer ◽  
New Class ◽  
Added Benefit ◽  
Polymer Modifiers

A new class of reactive polymer modifiers designed to improve binder-aggregate adhesion in asphalt concrete was evaluated. Using a controlled free radical polymerization process, polyisoprene was prepared with short blocks of reactive amino- or silane-functional monomer at one end of the polymer chain. The reactive polymers so synthesized were tested with a modified version of the Tunnicliff-Root method (ASTM D4867) for measuring retained tensile strengths after water immersion moisture conditioning at 60°C for 24 h. It was found that the retained tensile strength of the unmodified samples was 53 percent, and the retained tensile strength of the regular polyisoprene-modified control samples was between 57 and 69 percent, depending on the polymer molecular weight and content. The best retained tensile strengths of 86 and 90 percent, respectively, were obtained with samples modified with 3 and 5 percent by weight of the higher-molecular-weight silane-functional polyisoprene. The method for obtaining the desired effect is flexible; lower-cost monomers, such as butadiene, and more common polymerization methods, such as emulsion or anionic polymerization techniques, may be used equally well to produce polymers with similar or better performance characteristics. An added benefit is that the tested polymers imparted significant improvements in low-temperature performance measured with the thermal stress restrained cooling test.

Preliminary Development of Indirect Tensile Tester Cooperated with Industrial Computered Tomography for Asphalt Mixture

2010 ◽  
Vol 168-170 ◽  
pp. 2654-2657
Author(s):  
Xiao Jun Li ◽  
Li Hua Jiang ◽  
Yun Xian Wang
Keyword(s):  
Tensile Strength ◽  
Asphalt Concrete ◽  
Hoop Stress ◽  
Asphalt Mixture ◽  
Cylindrical Sample ◽  
Vertical Stress ◽  
Test Results ◽  
Tensile Tester ◽  
Indirect Tensile ◽  
Mixture Sample

In this paper, a new Indirect tensile tester (IDT) which can be cooperated with Industrial Computered Tomography (IDT) is developed. The new tester uses a set of sliders to transfer the vertical stress to hoop stress which applied to a hollow cylindrical sample. The micro-crack will be appeared and propagated in the weakest direction of hollow cylindrical sample with the increase of vertical stress and tensile strength can calculated with the maximum vertical stress. Due to the existence of central slider, the stress state of hollow cylindrical sample will be kept even after unloading and the mixture sample would not have recovery when it is moved for scanning with ICT. The test results show that the combination of the developed ICT with IDT will help obtain more useful information on understanding the nature of asphalt concrete with different tensile damage stages.

The Influence of Coconut Shell as Coarse Aggregates in Asphalt Mixture

2016 ◽  
Vol 700 ◽  
pp. 227-237 ◽  
Author(s):  
Siti Nur Amiera Jeffry ◽  
Ramadhansyah Putra Jaya ◽  
Norhafizah Manap ◽  
Nurfatin Aqeela Miron ◽  
Norhidayah Abdul Hassan
Keyword(s):  
Tensile Strength ◽  
Asphalt Concrete ◽  
Resilient Modulus ◽  
Asphalt Mixture ◽  
Indirect Tensile Strength ◽  
Coconut Shell ◽  
Engineering Properties ◽  
Modified Bitumen ◽  
Coarse Aggregates ◽  
Indirect Tensile

Significant quantities of coconut shell (CS), a by-product of agriculture, can be used as an artificial source of coarse aggregates. In this study, four CSs were used as coarse aggregates replacement in asphalt concrete with 0%, 10%, 20%, 30%, and 40% weight volumes. The particle sizes of the CSs used as main coarse aggregates range from 5 mm to 20 mm. The Marshall Stability test shows that the optimum bitumen content for asphalt mixtures is 5.1%. The engineering properties investigated include the volumetric, dynamic creep, indirect tensile strength, and resilient modulus. Test results show that stability decreases with increasing CS content because of high water absorption. Considering that CSs absorb bitumen, a further detailed investigation is needed to assess the performance of modified bitumen on mixture. Furthermore, the use of CSs as coarse aggregates in asphalt concrete help increase the resilient modulus, stiffness, and indirect tensile strength up to 30%. Generally, a 10% replacement of coarse aggregates with CSs is the optimal limit.

scholarly journals The Effect of Using Sustainable Materials on the Performance-Related Properties of Asphalt Concrete Mixture

2019 ◽  
Vol 5 (12) ◽  
pp. 2727-2737
Author(s):  
Amjad H. Albayati ◽  
Waleed Arrak Turkey
Keyword(s):  
Tensile Strength ◽  
Fatigue Life ◽  
Asphalt Concrete ◽  
Asphalt Mixture ◽  
Concrete Pavements ◽  
Strength Ratio ◽  
Damage Resistance ◽  
Reclaimed Asphalt ◽  
Production Temperature ◽  
Materials Used

Sustainability is very important in this world at this time. One of the best materials used for sustainability in asphalt concrete pavements is the warm mix asphalt (WMA) as well as the reclaimed asphalt pavement (RAP). WMA technology has the ability to reduce production temperature to reduce the fuel usage and emissions. RAP is the old concrete asphalt mixture that is out of service and using it again leads to preservation of the virgin material. This search studied the viability of using WMA with different percentages of RAP (10%, 30%, and 50%) and compared them with control hot mix asphalt (HMA) and WMA. The Marshall properties, Tensile strength ratio (TSR), rut depth and fatigue life were determined in this work. The results showed that the tensile strength ratio (TSR) for HMA was better than that for WMA by 6%, rut depth for HMA was (4.37 mm) lower than that for WMA was (6.5mm), better fatigue life was obtained for WMA was (700 cycle) as compared to HMA was (500 cycle). In case of WMA with RAP (WMA-RAP), when the percentage of RAP increased with WMA, the moisture damage resistance improved by 2.5%, 13.3% and 15.4% for G1, G3 and G5 respectively, also the rutting resistance improved by 34.6%, 48% and 62.3% for G1, G3 and G5 respectively, but deteriorated of fatigue life by 45.8%, 74% and 88.5% for G1, G3 and G5 respectively.

scholarly journals Selecting warm mix asphalt additives by the properties of warm mix asphalt mixtures - China experience

2015 ◽  
Vol 10 (1) ◽  
pp. 79-88 ◽  
Author(s):  
Xinsheng Li ◽  
Zhaoxing Xie ◽  
Wenzhong Fan ◽  
Lili Wang ◽  
Junan Shen
Keyword(s):  
Tensile Strength ◽  
Dynamic Stability ◽  
Asphalt Concrete ◽  
Warm Mix Asphalt ◽  
Asphalt Mixtures ◽  
Air Voids ◽  
Mastic Asphalt ◽  
Stone Mastic Asphalt ◽  
Crushed Aggregate ◽  
Marshall Stability

The objective of this research was to select the most effective warm asphalt additives for mix practice based on a series of laboratory testing programs such as density, Marshall stability, freeze-thaw splitting strength, dynamic stability, and bending beam strain. The experimental design of warm mix asphalt included the use of three commonlyused additives, two typical aggregate gradations, one crushed aggregate, and one modified asphalt. Results showed that: (1) the bulk specific gravity and air voids of all the mix specimens were similar to those of controls; (2) the Marshall stability and flow values of the warm stone mastic asphalt were 6.8%–26.6% and 3.5%–10.3%% higher than those of controls, respectively, and those of the warm asphalt concrete were 6.1%–15.6% and 6.5%–9.7% higher than those of controls, respectively; (3) the indirect tensile strength of two types of mixtures was 1.7%–14.4% lower than that of controls, and the average tensile strength ratio of the warm stone mastic asphalt and asphalt concrete was 4.3% and 1.3% higher than that of controls, respectively; (4) the dynamic stability of warm mix specimens was 10.8%–16.6% lower than that of the controls; (5) the average bending failure strain of warm stone mastic asphalt was 7.6% higher than that of the controls, and that of warm asphalt concrete was 12.8% lower than that of the controls; (6) Overall, warm asphalt mixtures with Sasobit and Rediset had relatively best performances required in Southeast China, where rutting and stripping are the main failures of asphalt pavements.

scholarly journals Evaluating Marination Effect of Diluted Zycothermon Hot Mix Asphalt

2017 ◽  
Vol 3 (3) ◽  
pp. 18
Author(s):  
Ilham I. Mohammed
Keyword(s):  
Tensile Strength ◽  
Asphalt Concrete ◽  
Hot Mix Asphalt ◽  
Asphalt Mixture ◽  
Strength Test ◽  
Stability Test ◽  
Test Results ◽  
Great Range ◽  
Tensile Strength Test ◽  
Moisture Conditions

Sinceasphalt concrete undergo different failure problems at different temperature and moisture conditions and for years many scientists and researchers used different kinds of materials and variety of methods for improving the properties of asphalt concrete made with either basalt or limestone.So it became necessary to provide the best possible way to get rid of these failure problems.In this study diluted zycotherm nanomaterial at three different percentages by weight of aggregate used with two aggregate types, basalt and limestone, and asphalt concrete made with the marinated aggregate and later the properties of asphalt concrete were investigated after the marination.Indirect tensile strength test and retained stability test results were used to evaluate the marinating effect.As a result zycotherm dilution by weight of aggregate has changed the properties of asphalt mixture and improved to a great extent. From the results it can be concluded that rutting and fatigue problems decreased with a great range.

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