Effects of Regular and Nano Sized Hydrated Lime Fillers on Fatigue and Bond Strength Behavior of Asphalt Mastic

2018 ◽  
Vol 2672 (28) ◽  
pp. 31-41 ◽  
Author(s):  
Aditya Kumar Das ◽  
Dharamveer Singh
Keyword(s):  
Fatigue Life ◽  
Bond Strength ◽  
Fatigue Damage ◽  
Asphalt Binder ◽  
Hydrated Lime ◽  
Moisture Damage ◽  
Test Results ◽  
Asphalt Mastic ◽  
Asphalt Mastics ◽  
Number Of Cycles

The present study evaluates effects of regular sized hydrated lime (RHL) and nano sized hydrated lime (NHL) on fatigue and bond strength of asphalt mastic. The asphalt mastics were produced in the laboratory using AC-30 binder with different combinations of basalt–RHL, and basalt–NHL fillers. The dosages of RHL and NHL were selected as 0%, 5%, 10%, 15%, and 20% by weight of asphalt binder, and the percentage of basalt filler was adjusted accordingly. Filler to binder (F/B) ratio was selected as 0.8 (by mass ratio) for all mastic sample preparation. The fatigue damage behavior (number of cycles to fatigue damage/failure) of asphalt mastic was evaluated using a linear amplitude sweep (LAS) test. Further, the interfacial bond strengths of asphalt mastic and aggregate samples were evaluated using the bitumen bond strength (BBS) test. Overall test results indicate that mineralogy, surface area, and interaction properties of RHL and NHL fillers have a significant effect on fatigue, bond strength, and moisture damage performance of asphalt mastic. The results from the LAS test showed that NHL filler predominantly enhanced the fatigue life of asphalt mastic as compared with RHL filler. BBS test results imply that the contribution of NHL filler is significant over RHL filler in improving the bond strength and moisture damage resistance of asphalt mastic. Overall asphalt mastic with 20% NHL filler had better fatigue life, bond strength, and moisture damage performance over mastic with other percentages of RHL or NHL fillers.

scholarly journals Interfacial bond strength and moisture induced damage characteristics of asphalt mastic-aggregate system composed of Nano hydrated lime filler

2020 ◽  
Vol 13 (6) ◽  
pp. 665-672
Author(s):  
Aditya Kumar Das ◽  
Dharamveer Singh
Keyword(s):  
Bond Strength ◽  
Asphalt Binder ◽  
Hydrated Lime ◽  
Moisture Damage ◽  
Interfacial Bond ◽  
Interfacial Bond Strength ◽  
Damage Potential ◽  
Damage Resistance ◽  
Asphalt Mastic ◽  
Asphalt Mastics

AbstractThe present study was undertaken to investigate the impact of a unique combination of fillers on interfacial bond strength and moisture-induced damage potential of asphalt mastic. One asphalt binder (AC-30), three fillers including Basalt (B), Hydrated Lime (HL), and Nano-Hydrated lime (NHL) were selected to prepare asphalt mastics for a wide range of filler-binder (f/b) ratio (0.6 to 1.2). The dosages of HL and NHL were considered 0%, 5%, 10%, 15%, and 20% by weight of asphalt binder, and the dosage of B filler was adjusted to meet the respective f/b ratio. The interfacial bond strength and moisture-induced damage potential of asphalt mastic specimens were determined using the Bitumen Bond Strength (BBS) test. The BBS test parameters inferred that both B-HL and B-NHL filler combinations can enhance the bond strength and moisture damage resistance of asphalt mastic. Besides, asphalt mastic composed of B-NHL filler can be less susceptible to bond failure and moisture damage with improved adhesion and cohesion properties than B-HL filler. Additionally, asphalt mastic composed of a lower percentage (10%–15%) of NHL filler showed better bond strength and moisture damage resistance over mastic composed of a higher percentage (15%–20%) of HL filler. Asphalt mastic prepared with an f/b ratio less than 1.0 was found to be suitable to achieve better performance considering the moisture-induced damage properties. Grey relational analysis (GRA) method was used to analyze the correlation degree between filler properties and moisture damage properties of asphalt mastics. Based on the GRA results, Rigden voids and specific surface area are suggested to be the two most influential properties on the moisture-induced damage potential of asphalt mastic.

Effects of Hydrated Lime on Consistency Properties of Asphalt Binders

2011 ◽  
Vol 97-98 ◽  
pp. 214-219
Author(s):  
Aaron D. Mwanza ◽  
Pei Wen Hao ◽  
Hai Nian Wang
Keyword(s):  
Asphalt Binder ◽  
Hydrated Lime ◽  
Linear Functions ◽  
Asphalt Binders ◽  
Asphalt Mastic ◽  
Lime Content ◽  
Concrete Mixtures ◽  
Asphalt Mastics ◽  
Pertinent Information ◽  
Consistency Properties

Although the addition of hydrated lime to mineral aggregates at asphalt production plants has become mandatory for use in all asphalt concrete mixtures, the consequences of such additives at asphalt binder- mineral aggregate contact in the hot bin have shown a great effect on the consistency properties of the resulting asphalt mastics as compared to that of a neat asphalt binder. Considering that many highway agencies in developing countries still use asphalt binders consistency properties to verify material specifications for acceptance and construction practices control to build sustainable highways, it is eminent that asphalt mastic other than neat asphalt binder should provide pertinent information for consistency characterization of the neat asphalt binder in question. Fundamental consistency properties of asphalt binder containing hydrated lime to a conventional No. 70 asphalt binder (Penetration Grade) designed to meet the JTG F40-2004 specification of China were investigated. Hydrated lime was dry mixed with neat asphalt binder at hydrated lime to binder ratio’s ranging from 0.0 to 1.5 in ratio increments of 0.3% by weight of asphalt. Analyses of test results show that asphalt mastic consistency properties are well-defined linear functions of hydrated lime content. Penetration and ductility shows a linear reduction at increased hydrated lime content estimated at 14 (0.1mm) and 15cm per 0.1% of hydrated lime increment respectively while softening point and apparent viscosity increases at the rate of 6oC and 0.1 centipoises per 0.1% of hydrated lime increment respectively.

scholarly journals Impact of Graphene Oxide on Zero Shear Viscosity, Fatigue Life and Low-Temperature Properties of Asphalt Binder

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3073
Author(s):  
Abbas Mukhtar Adnan ◽  
Chaofeng Lü ◽  
Xue Luo ◽  
Jinchang Wang
Keyword(s):  
Graphene Oxide ◽  
Fatigue Life ◽  
Low Temperature ◽  
Shear Viscosity ◽  
Storage Stability ◽  
Asphalt Binder ◽  
Asphalt Binders ◽  
Test Results ◽  
Zero Shear Viscosity ◽  
Modified Asphalt

This study has investigated the impact of graphene oxide (GO) in enhancing the performance properties of an asphalt binder. The control asphalt binder (60/70 PEN) was blended with GO in contents of 0%, 0.5%, 1%, 1.5%, 2%, and 2.5%. The permanent deformation behavior of the modified asphalt binders was evaluated based on the zero shear viscosity (ZSV) parameter through a steady shear test approach. Superpave fatigue test and the linear amplitude sweep (LAS) method were used to evaluate the fatigue behavior of the binders. A bending beam rheometer (BBR) test was conducted to evaluate the low-temperature cracking behavior. Furthermore, the storage stability of the binders was investigated using a separation test. The results of the ZSV test showed that GO considerably enhanced the steady shear viscosity and ZSV value, showing a significant contribution of the GO to the deformation resistance; moreover, GO modification changed the asphalt binder’s behavior from Newtonian to shear-thinning flow. A notable improvement in fatigue life was observed with the addition of GO to the binder based on the LAS test results and Superpave fatigue parameter. The BBR test results revealed that compared to the control asphalt, the GO-modified binders showed lower creep stiffness (S) and higher creep rate (m-value), indicating increased cracking resistance at low temperatures. Finally, the GO-modified asphalt binders exhibited good storage stability under high temperatures.

Effect of Healing on Fatigue Law Parameters of Asphalt Binders

2012 ◽  
Vol 2293 (1) ◽  
pp. 96-105 ◽  
Author(s):  
Arianna Stimilli ◽  
Cassie Hintz ◽  
Zhijun Li ◽  
Raul Velasquez ◽  
Hussain U. Bahia
Keyword(s):  
Fatigue Life ◽  
Asphalt Binder ◽  
Rest Period ◽  
Power Laws ◽  
Asphalt Binders ◽  
Traffic Loading ◽  
Damage Level ◽  
Rest Periods ◽  
Pavement Structure ◽  
Number Of Cycles

Asphalt binder has the ability to self-heal during rest periods when repetitive loading is applied. Studying the effect of rest on fatigue law parameters provides useful insight into the healing capabilities of asphalt binders. Currently, standard testing and analysis procedures to quantify asphalt binder healing capability are limited and difficult to implement in practice. Fatigue is known to depend on both traffic loading and pavement structure. Power law relations (e.g., Nf = Aγ−B) are commonly used for fatigue analysis of pavement materials. Power laws are used to estimate fatigue life (i.e., number of cycles to failure, Nf) as a function of load amplitude (e.g., strain, γ), which is a reflection of the pavement structure. In this study, testing consisted of strain-controlled time sweeps in the dynamic shear rheometer with a single rest period inserted at a specified damage level. With the selected test, the effect of healing on the relationship between fatigue life and strain was investigated. Nine neat and modified binders were tested. Healing testing was conducted at multiple age levels and strains. Healing that resulted from a single rest period had an insignificant effect on fatigue performance compared with modification and oxidative aging. Although this paper highlights the challenges of using few rest periods to predict healing potential, preliminary results of testing with multiple rest periods show the importance of healing. Further investigation is needed to verify the effect of multiple rest periods on binder fatigue.

Research on Interaction between Asphalt and Filler Based on DSR Test

2013 ◽  
Vol 723 ◽  
pp. 480-487 ◽  
Author(s):  
Jiu Peng Zhang ◽  
Jian Zhong Pei ◽  
Yan Wei Li
Keyword(s):  
Shear Modulus ◽  
Volume Fraction ◽  
Hydrated Lime ◽  
Interaction Coefficient ◽  
Complex Shear Modulus ◽  
Volume Fractions ◽  
Asphalt Mastic ◽  
Complex Shear ◽  
Asphalt Mastics ◽  
Einstein Coefficient

To explain the interactive effect between asphalt and fillers in the asphalt mastic, it is probably to start with an assessment of the rheology properties, since asphalt mastics are viscoelastic materials. In this study, firstly prepare the asphalt mastics with different dosage of limestone filler, and the volume fractions of fillers were 0, 14, 24, 32, 39 and 45%. And then, the same asphalt is mixed with different fillers, such as cement and hydrated lime, and the volume fractions of fillers were 18, 23, 28and 33%. DSR test was conducted on all of the asphalt mastic specimens to measure the complex shear modulus G* at different temperature. The volume filling effects and interaction between asphalt and filler are discussed on the analysis of complex shear modulus coefficient and Nielsens model model. It is obviously that G* of asphalt mastics decrease with the test temperature, but increase with the volume fraction of filler. A function relation between complex shear modulus coefficient and volume fraction of fillers is established, and the interaction coefficient α is proposed. For limestone, cement and hydrated lime filler, the interaction coefficient α values are 0.301, 0.317 and 0.429 respectively. Based on Nielsens model and DSR test data, the Einstein coefficient KE is calculated, and Einstein coefficients are 3.761, 5.09 and 7.44 for asphalt-limestone mastic, asphalt-cement mastic and asphalt-hydrated lime mastic respectively. Both the interaction coefficient α and Einstein coefficient KE can be used to represent the interaction between asphalt binder and filler. The bigger value means the better interaction.

Fatigue Tests on Aluminum Specimens Subjected to Constant and Random Amplitude Loadings

2016 ◽  
Vol 138 (4) ◽  
Author(s):  
Morteza Rahimi Abkenar ◽  
David P. Kihl ◽  
Majid T. Manzari
Keyword(s):  
Fatigue Life ◽  
Aluminum Alloys ◽  
Cyclic Stress ◽  
Fatigue Tests ◽  
Test Results ◽  
Number Of Cycles ◽  
Mechanical Devices ◽  
Cycles To Failure ◽  
Amplitude Versus ◽  
Weight Structures

Increasing interest in using aluminum as the structural component of light-weight structures, mechanical devices, and ships necessitates further investigations on fatigue life of aluminum alloys. The investigation reported here focuses on characterizing the performance of cruciform-shaped weldments made of 5083 aluminum alloys in thickness of 9.53 mm (3/8 in.) under constant, random, and bilevel amplitude loadings. The results are presented as S/N curves that show cyclic stress amplitude versus the number of cycles to failure. Statistical procedures show good agreements between test results and predicted fatigue life of aluminum weldments. Moreover, the results are compared to the results obtained from previous experiments on aluminum specimens with thicknesses of 12.7 mm (1/2 in.) and 6.35 mm (1/4 in.).

Based on the Theory of the Miner Fatigue Damage of Fuzziness Analysis and Mathematical Modeling

2013 ◽  
Vol 437 ◽  
pp. 124-128 ◽  
Author(s):  
Xiao Fen Liu ◽  
Zhuo Wu ◽  
Ming Song ◽  
Min Zheng
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
Fatigue Life ◽  
Fatigue Damage ◽  
Membership Function ◽  
Test Results ◽  
Fuzzy Analysis ◽  
Loading Sequence ◽  
The Membership Function

In this paper, based on Miner rule, fuzzy analysis was carried out on predicting the fatigue damage, and mathematical model was established by considering loading sequence and interaction between loads and introducing the membership function. The analysis results show that the predicting fatigue life via the "Blurredregion" extension methods is closer to the test results.

Application of Surface Roughness Parameters to the Evaluation of Low Cycle Fatigue Damage in Austenitic Stainless Steel

2013 ◽  
Author(s):  
Nao Fujimura ◽  
Takashi Nakamura ◽  
Hiroyuki Oguma
Keyword(s):  
Surface Roughness ◽  
Fatigue Life ◽  
Fatigue Damage ◽  
Crack Detection ◽  
Low Cycle Fatigue ◽  
Roughness Parameter ◽  
Strain Range ◽  
Maximum Height ◽  
Roughness Parameters ◽  
Number Of Cycles

Changes in the surface roughness of SUS316NG during cyclic loadings were investigated, and the relations between those changes and the crack initiation and propagation processes are discussed on the basis of microscopic observations and cellulose acetate replica observations. Strain-controlled fatigue tests were conducted at three constant strain ranges. Surface roughness was measured periodically during the tests, and three roughness parameters were calculated: arithmetic mean roughness Ra, surface profile maximum height Rmax, and maximum valley depth Rv. Until the middle of fatigue life, all three increased linearly with the number of cycles regardless of the strain range, and their rates of increase became smaller with decreasing strain range. Surface observation revealed that small cracks initiated very early in fatigue life, propagated slowly until the middle of fatigue life, and then grew rapidly. Changes in surface roughness are therefore sensitive to fatigue loading even when cracks are very small and crack detection is difficult. The results suggest that surface roughness can probably be used to assess fatigue damage because until the middle of fatigue life it increases linearly with the number of cycles. The definition of each roughness parameter and the changes show that Rmax and Rv are suitable for damage assessment.

Design of welded structures working under random loading

2002 ◽  
Vol 216 (2) ◽  
pp. 191-201 ◽  
Author(s):  
R Kouta ◽  
M Gungad ◽  
D Play
Keyword(s):  
Fatigue Life ◽  
Statistical Analysis ◽  
Design Method ◽  
Test Results ◽  
Random Loading ◽  
Matrix Representations ◽  
Fatigue Lifetime ◽  
Random Loads ◽  
Number Of Cycles ◽  
Cycles To Failure

This paper presents a design method for prediciting the fatigue life of T-joint assemblies loaded by random loads, based on a statistical analysis of tests. This sduty was on the correclation between the types of loading observed in practive and test results obtained for fatigue life determination. The work follows three steps: analysis tof the statistical distributions of random loads that illustrate extremen value from Markov matrix representations; statistical analysis of lifetimes obtained when the specimens are sbumitted to random loads defined earlier; design of a set of endurance curves [stress-number of cycles to failure ( S-N) curves], called ‘random’ S-N curves. These SN curves. These S-N curves are shifted compared with that obtained under sinusoidal loading. Random S-N curve positions in the S-N plane are obtimized depending on the lifetime able to take into account the damege due to the small cycles that are often present in actual loading. The use of random S-N curves for fatigue life calculations gives results matching with theral fatigue lifetime obtained with a T-joint assembly of a bogie chassis used for railway applications. Different analyses show the robustness of the proposed approach.

Determination of Hydrated Lime Content in Asphalt Mastic Incorporating High Temperature Performances

2014 ◽  
Vol 912-914 ◽  
pp. 81-84
Author(s):  
Liang Zhou
Keyword(s):  
High Temperature ◽  
Asphalt Mixture ◽  
Hydrated Lime ◽  
Test Results ◽  
Dynamic Shear ◽  
Addition Agent ◽  
Asphalt Mastic ◽  
Lime Content ◽  
Different Content

Different hydrated lime content in asphalt mastic greatly influences the performances of asphalt mixture. The aim of this paper is to study asphalt mastic made with different content of hydrated lime was used in Dynamic Shear Rheological and Viscosity Tests. The optimum hydrated lime content was proposed in terms of test results above. The results illustrated that hydrated lime was an appropriate addition agent which can improve asphalt mastic properties greatly, however, too much hydrated lime may result in the decrease of asphalt mixture performances.

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