Evaluation of Moisture Susceptibility of Asphalt Mixtures Using Dynamic Modulus

2016 ◽  
Vol 45 (4) ◽  
pp. 20150136 ◽  
Author(s):  
Jaejun Lee ◽  
Sung-Je Moon ◽  
Jeonghyuk Im ◽  
Sunglin Yang
Keyword(s):  
Dynamic Modulus ◽  
Asphalt Mixtures ◽  
Moisture Susceptibility

Using Dynamic Modulus Test to Evaluate Moisture Susceptibility of Asphalt Mixtures

2009 ◽  
Vol 2127 (1) ◽  
pp. 29-35 ◽  
Author(s):  
Atish A. Nadkarni ◽  
Kamil E. Kaloush ◽  
Waleed A. Zeiada ◽  
Krishna Prapoorna Biligiri
Keyword(s):  
Dynamic Modulus ◽  
Asphalt Mixtures ◽  
Moisture Susceptibility ◽  
Dynamic Modulus Test

scholarly journals Cold In-Place Recycling Asphalt Mixtures: Laboratory Performance and Preliminary M-E Design Analysis

Materials ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2036
Author(s):  
Dongzhao Jin ◽  
Dongdong Ge ◽  
Siyu Chen ◽  
Tiankai Che ◽  
Hongfu Liu ◽  
...  
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Dynamic Modulus ◽  
Asphalt Pavement ◽  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Asphalt Emulsion ◽  
Moisture Susceptibility ◽  
Low Temperature Cracking

Cold in-place recycling (CIR) asphalt mixtures are an attractive eco-friendly method for rehabilitating asphalt pavement. However, the on-site CIR asphalt mixture generally has a high air void because of the moisture content during construction, and the moisture susceptibility is vital for estimating the road service life. Therefore, the main purpose of this research is to characterize the effect of moisture on the high-temperature and low-temperature performance of a CIR asphalt mixture to predict CIR pavement distress based on a mechanistic–empirical (M-E) pavement design. Moisture conditioning was simulated by the moisture-induced stress tester (MIST). The moisture susceptibility performance of the CIR asphalt mixture (pre-mist and post-mist) was estimated by a dynamic modulus test and a disk-shaped compact tension (DCT) test. In addition, the standard solvent extraction test was used to obtain the reclaimed asphalt pavement (RAP) and CIR asphalt. Asphalt binder performance, including higher temperature and medium temperature performance, was evaluated by dynamic shear rheometer (DSR) equipment and low-temperature properties were estimated by the asphalt binder cracking device (ABCD). Then the predicted pavement distresses were estimated based on the pavement M-E design method. The experimental results revealed that (1) DCT and dynamic modulus tests are sensitive to moisture conditioning. The dynamic modulus decreased by 13% to 43% at various temperatures and frequencies, and the low-temperature cracking energy decreased by 20%. (2) RAP asphalt incorporated with asphalt emulsion decreased the high-temperature rutting resistance but improved the low-temperature anti-cracking and the fatigue life. The M-E design results showed that the RAP incorporated with asphalt emulsion reduced the international roughness index (IRI) and AC bottom-up fatigue predictions, while increasing the total rutting and AC rutting predictions. The moisture damage in the CIR pavement layer also did not significantly affect the predicted distress with low traffic volume. In summary, the implementation of CIR technology in the project improved low-temperature cracking and fatigue performance in the asphalt pavement. Meanwhile, the moisture damage of the CIR asphalt mixture accelerated high-temperature rutting and low-temperature cracking, but it may be acceptable when used for low-volume roads.

Dynamic Properties to Evaluate Moisture Sensitivity of Asphalt Mixtures

2013 ◽  
Vol 723 ◽  
pp. 283-290
Author(s):  
Kuo Hung Tseng ◽  
Yu Sheng Lin
Keyword(s):  
Stress Relaxation ◽  
Dynamic Modulus ◽  
Dynamic Properties ◽  
Asphalt Mixture ◽  
Relaxation Modulus ◽  
Asphalt Mixtures ◽  
Loading Frequency ◽  
Prony Series ◽  
Moisture Susceptibility ◽  
Air Voids

An experimental measurement of dynamic properties, including dynamic modulus and phase angle, of asphalt mixtures with varying saturation levels of moisture has been carried out in the study. The specimens of asphalt mixture were compacted with three different air void contents and two different levels of moisture saturation. The relaxation modulus expressed by Prony series was estimated from the Prony series expression of dynamic modulus. The purpose of this study is to identify the effect of air voids on dynamic properties that affect and control moisture susceptibility of asphalt mixtures and then compare the stress relaxation behavior of asphalt mixtures between dry and moisture conditioning. The results show that dynamic properties are quite sensitive to temperature and loading frequency in dry and different saturation levels of moisture. Moreover, and the smaller the air voids and saturation level, the greater the increase in dynamic modulus and rate of stress relaxation, indicating better resistance to cracking and less moisture susceptibility.

scholarly journals Research on the Performance of Regenerant Modified Cold Recycled Mixture with Asphalt Emulsions

2021 ◽  
Vol 13 (13) ◽  
pp. 7284
Author(s):  
Decai Wang ◽  
Tengteng Guo ◽  
Haolei Chang ◽  
Xianhua Yao ◽  
Yuanzhao Chen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Dynamic Modulus ◽  
Dynamic Mechanical Properties ◽  
Moisture Susceptibility ◽  
Splitting Strength ◽  
Temperature Performance ◽  
Strength Tests ◽  
Asphalt Emulsions ◽  
Coefficient Method

In order to study the mechanical properties and effect of a regenerant on a cold recycled mixture with asphalt emulsions (CRMEs), the moisture susceptibility, high-temperature performance, low-temperature performance, dynamic mechanical properties and durability of CRMEs were analyzed and evaluated by immersion splitting strength tests, freeze-thaw splitting strength tests, rutting tests, semi-circle bending tests, uniaxial compression dynamic modulus tests and indirect tensile tests. Scanning electron microscopy (SEM) was used to analyze the micromorphology of CRMEs modified with regenerant. Finally, a comprehensive evaluation system of five different CRMEs was established based on the efficacy coefficient method to quantitatively analyze the comprehensive performance of the CRMEs. The test results showed that the regenerant can significantly improve the water immersion splitting strength, freeze-thaw splitting strength fracture energy density, and fatigue resistance of CRMEs. However, the addition of regenerant affected the high-temperature performance of the cold recycled mixture. The dynamic modulus of the CRMEs first increased and then decreased with regenerant content increasing. When the regenerant content was 8%, the dynamic modulus of the CRMEs was the highest. Adding styrene-butadiene rubber (SBR) latex can improve the high-temperature performance of CRMEs, but the moisture susceptibility, low temperature performance and fatigue resistance of the cold recycled mixture were not significantly improved, and the dynamic modulus of the mixture was reduced. Based on the efficacy coefficient method, the optimal content of regenerant is 8%. Regenerant are potential modifiers for cold recycled mixture that they can significantly improve the dynamic mechanical properties and durability.

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.

Precision Analysis of Sigmoidal Master Curve Model for Dynamic Modulus of Asphalt Mixtures

2018 ◽  
Vol 30 (11) ◽  
pp. 04018290 ◽  
Author(s):  
Ningyi Su ◽  
Feipeng Xiao ◽  
Jingang Wang ◽  
Serji Amirkhanian
Keyword(s):  
Dynamic Modulus ◽  
Master Curve ◽  
Asphalt Mixtures ◽  
Precision Analysis ◽  
Curve Model
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