Assessing the effect of fillers on LVE properties of asphalt mastics at intermediate temperatures
- PDF / 1,301,935 Bytes
- 16 Pages / 547.087 x 737.008 pts Page_size
- 64 Downloads / 194 Views
(0123456789().,-volV) ( 01234567 89().,-volV)
ORIGINAL ARTICLE
Assessing the effect of fillers on LVE properties of asphalt mastics at intermediate temperatures Mohit Chaudhary . Nikhil Saboo . Ankit Gupta . Bernhard Hofko . Michael Steineder
Received: 28 January 2020 / Accepted: 8 July 2020 RILEM 2020
Abstract This study aims at examining the performance of asphalt mastics in the Linear Viscoelastic (LVE) domain incorporating three Indian and three Austrian fillers. The various physical, morphological, and chemical properties of the fillers were analyzed with the help of respective characterization tests. In addition to the particle size distribution curve and fineness modulus, a new parameter called Filler Grain Coefficient (FGC) has been introduced in this study to quantify the distribution of particles in the system. This paper also attempts to find a correlation between various physical parameters. There are two variables i.e., jG jLVE and jG jratio in order to quantify the Linear Viscoelastic complex modulus. The effects of both volume and surface area of fillers have been manifested by three ratios denoted as V/FM, V/FGC, and V/ M. Chaudhary (&) N. Saboo A. Gupta Department of Civil Engineering, IIT (BHU), Varanasi 221005, India e-mail: [email protected] N. Saboo e-mail: [email protected] A. Gupta e-mail: [email protected] B. Hofko M. Steineder Institute of Transportation, Vienna University of Technology, 1040 Vienna, Austria e-mail: [email protected] M. Steineder e-mail: [email protected]
RV. To compare the outcome of the study, the Strategic Highway Research Program Linear Viscoelastic strain criteria is also included, which examines the applicability of the criteria to the asphalt mastics. The research incorporates a wide range of fillers with variable properties, as confirmed by the test results. Filler parameters Rigden Voids and Filler Grain Coefficient were found to be strongly correlated with almost all physical properties. On the grounds of variation in LVEM with volume concentration of filler, the highest rank can be attributed to Red Mud and LimeStone, respectively, followed by other fillers with Marble Dust being the lowest. The reinforcing effect of fillers and higher surface area contributed to the exponential increase in jG jLVE , with an increase in volumetric concentration. The variation of both variables: jG jLVE and jG jratio , presented V/FM as the most worthy parameter, as it illustrated variation at different temperatures. The Linear Viscoelastic limits obtained from the study were relatively conservative compared to those from the SHRP study, this confirms the unsuitability of applying SHRP equations to the asphalt mastics. Moreover, the relationship instigated in the study can be used to reckon the LVE strain limit and to further analyse asphalt mastics. Keywords Linear viscoelastic Filler grain coefficient LVEM Mastic SHRP
96
Page 2 of 16
1 Introduction The particles finer than 75 micrometers, i.e
Data Loading...
