scholarly journals Influence of association of “EVA-NBR” on indirect tensile strength of modified bituminous concrete

2016 ◽  
Author(s):  
M. Chinoun ◽  
K. Soudani ◽  
S. Haddadi
Keyword(s):  
Tensile Strength ◽  
Indirect Tensile Strength ◽  
Indirect Tensile ◽  
Bituminous Concrete

Study on Strength Characteristics Improvement of Polyethylene Modified Bituminous Concrete Mixes

2019 ◽  
Vol 803 ◽  
pp. 216-221
Author(s):  
Khwairakpam Lakshman Singh ◽  
Debjani Panda
Keyword(s):  
Tensile Strength ◽  
Permanent Deformation ◽  
Indirect Tensile Strength ◽  
Strength Characteristics ◽  
Strength Ratio ◽  
Modified Binders ◽  
Indirect Tensile ◽  
Modified Binder ◽  
Marshall Stability ◽  
Bituminous Concrete

The present study shows an investigation on improvement of bituminous binder and its mixes using modified binders with different percentage (1% to 7%) of domestic waste polyethylene (PE).The temperature susceptibility and penetration index (PI) of the modified binders were calculated. It is observed that PI value of modified binder is found higher than unmodified binder. The strength characteristics in terms of Marshall Stability and moisture susceptibility expressed in terms of indirect tensile strength ratio (ITSR) of bituminous concrete were determined in the present study. Marshall stability of the bituminous mixture containing 3% PE increased by 34.2% as compare to mixture containing unmodified binder. The addition of 3% PE to neat bitumen, results in an increase of 20% in indirect tensile strength ratio. Using PE modified binder in bituminous concrete mixes increases stability, indirect tensile strength which turn in provide better resistance against permanent deformation.

scholarly journals Characteristics of Bituminous Concrete Mixtures Utilizing Copper Slag

2021 ◽  
Vol 10 (1) ◽  
pp. 1-10
Author(s):  
Chavan Ravishankar ◽  
M.S. Nagakumar ◽  
H.K. Krishnegowda ◽  
Abhilash R Prasad
Keyword(s):  
Tensile Strength ◽  
Copper Slag ◽  
Indirect Tensile Strength ◽  
Concrete Mixtures ◽  
Static Tensile ◽  
Indirect Tensile ◽  
High Level ◽  
Mineral Fillers ◽  
By Products ◽  
Bituminous Concrete

Study work on the effectiveness and use of Industrial by-products (IBP) in flexible pavements is restricted. Several factors however need to be analyzed specifically before a greater proportion of industrial by-products can be used in bituminous concrete mixtures with a high level of confidence. Effects of copper slag on volumetric and strength parameters such as Marshall Parameters, static tensile properties, and moisture resistivity of bituminous concrete mixtures using copper slag as mineral fillers need to be examined and thoroughly analyzed. Quantitative analyses of the elements and the morphology of the copper slag have been studied by Energy Dispersive X-ray Analyzer (EDX) and Scanning Electron Microscope (SEM). The use of copper slag as a mineral filler in bituminous concrete grade-2 mixtures showed an increase in stability, indirect tensile strength, and moisture resistance compared to traditional mixtures. Keywords— Industrial by-products (IBP), Indirect Tensile Strength, Moisture resistivity, SEM, EDX

scholarly journals Study on Indirect Tensile Strength of Plastic Waste Bituminous Concrete for Road Construction

2018 ◽  
Vol 7 (1) ◽  
pp. 93-106
Author(s):  
Anurag V. Tiwari ◽  
Y R M Rao
Keyword(s):  
Tensile Strength ◽  
Road Construction ◽  
Plastic Waste ◽  
Indirect Tensile Strength ◽  
Combined Process ◽  
Waste Plastic ◽  
Dry Process ◽  
Wet Process ◽  
Indirect Tensile ◽  
Bituminous Concrete

Abstract The rutting and cracking of pavements has become very common problem in India. Also the quantity of plastic waste has significantly increased in the recent year due to industrialization and population growth. Improper disposal of these plastic wastes has caused various environmental problems, hence the alternative use of waste plastic in bituminous concrete for road construction has been encouraged by the community. In the present study the Indirect Tensile Strength Test has been carried out on Marshall Samples confirming to ASTM D6931-12. Three different processes (dry process, wet process and combined process) of mixing of waste plastic were used during experimentation. It was found that the indirect tensile strength (ITS) and tensile strength ratio (TSR) of sample significantly increase up to 8%, 6% and 12% for dry process, wet process and combined process respectively for LDPE and HDPE type of waste plastic.

scholarly journals Rejuvenation Mechanism of Asphalt Mixtures Modified with Crumb Rubber

CivilEng ◽  
2021 ◽  
Vol 2 (2) ◽  
pp. 370-384
Author(s):  
Hossein Noorvand ◽  
Kamil Kaloush ◽  
Jose Medina ◽  
Shane Underwood
Keyword(s):  
Tensile Strength ◽  
Dynamic Loading ◽  
Creep Compliance ◽  
Asphalt Mixture ◽  
Crumb Rubber ◽  
Indirect Tensile Strength ◽  
Laboratory Evaluation ◽  
Strength Testing ◽  
Noise Mitigation ◽  
Indirect Tensile

Asphalt aging is one of the main factors causing asphalt pavements deterioration. Previous studies reported on some aging benefits of asphalt rubber mixtures through laboratory evaluation. A field observation of various pavement sections of crumb rubber modified asphalt friction courses (ARFC) in the Phoenix, Arizona area indicated an interesting pattern of transverse/reflective cracking. These ARFC courses were placed several years ago on existing jointed plain concrete pavements for highway noise mitigation. Over the years, the shoulders had very noticeable and extensive cracking over the joints; however, the driving lanes of the pavement showed less cracking formation in severity and extent. The issue with this phenomenon is that widely adopted theories that stem from continuum mechanics of materials and layered mechanics of pavement systems cannot directly explain this phenomenon. One hypothesis could be that traffic loads continually manipulate the pavement over time, which causes some maltenes (oils and resins) compounds absorbed in the crumb rubber particles to migrate out leading to rejuvenation of the mastic in the asphalt mixture. To investigate the validity of such a hypothesis, an experimental laboratory testing was undertaken to condition samples with and without dynamic loads at high temperatures. This was followed by creep compliance and indirect tensile strength testing. The results showed the higher creep for samples aged with dynamic loading compared to those aged without loading. Higher creep compliance was attributed to higher flexibility of samples due to the rejuvenation of the maltenes. This was also supported by the higher fracture energy results obtained for samples conditioned with dynamic loading from indirect tensile strength testing.

scholarly journals Evaluations of Nano-Sized Hydrated Lime on the Moisture Susceptibility of Hot Mix Asphalt Mixtures

2012 ◽  
Vol 174-177 ◽  
pp. 82-90 ◽  
Author(s):  
Ju Nan Shen ◽  
Zhao Xing Xie ◽  
Fei Peng Xiao ◽  
Wen Zhong Fan
Keyword(s):  
Tensile Strength ◽  
Experimental Design ◽  
Hot Mix Asphalt ◽  
Hydrated Lime ◽  
Asphalt Mixtures ◽  
Indirect Tensile Strength ◽  
Moisture Resistance ◽  
Strength Ratio ◽  
Moisture Susceptibility ◽  
Indirect Tensile

The objective of this study was to evaluate the effect of nano-sized hydrated lime on the moisture susceptibility of the hot mix asphalt (HMA) mixtures in terms of three methodologies to introduce into the mixtures. The experimental design for this study included the utilizations of one binder source (PG 64-22), three aggregate sources and three different methods introducing the lime. A total of 12 types of HMA mixtures and 72 specimens were fabricated and tested in this study. The performed properties include indirect tensile strength (ITS), tensile strength ratio (TSR), flow, and toughness. The results indicated that the nano-sized lime exhibits better moisture resistance. Introducing process of the nano-sized lime will produce difference in moisture susceptibility.

scholarly journals Laboratory Evaluation of the Use of Florida Washed Shell in Open-Graded Asphalt Mixtures

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7060
Author(s):  
Mohammad Alharthai ◽  
Qing Lu ◽  
Ahmed Elnihum ◽  
Asad Elmagarhe
Keyword(s):  
Tensile Strength ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Indirect Tensile Strength ◽  
Laboratory Evaluation ◽  
Void Content ◽  
Coarse Aggregates ◽  
Significant Difference ◽  
Indirect Tensile ◽  
Marshall Stability

This study investigates the substitution of conventional aggregate with a Florida washed shell in open-graded asphalt mixtures and evaluates the optimal substitution percentage in aggregate gradations of various nominal maximum aggregate sizes (NMASs) (i.e., 4.75, 9.5, and 12.5 mm). Laboratory experiments were performed on open-graded asphalt mixture specimens with the coarse aggregate of sizes between 2.36 and 12.5 mm being replaced by the Florida washed shell at various percentages (0, 15, 30, 45, and 100%). Specimen properties relevant to the performance of open-graded asphalt mixtures in the field were tested, evaluated, and compared. Specifically, a Marshall stability test, Cantabro test, indirect tensile strength test, air void content test, and permeability test were conducted to evaluate the strength, resistance to raveling, cracking resistance, void content, and permeability of open-graded asphalt mixtures. The results show that there is no significant difference in the Marshall stability and indirect tensile strength when the coarse aggregates are replaced with Florida washed shell. This study also found that the optimum percentages of Florida washed shell in open-graded asphalt mixture were 15, 30, and 45% for 12.5, 9.5, and 4.75 mm NMAS gradations, respectively.

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