Evaluation of the Aging of Styrene-Butadiene-Styrene Modified Asphalt Binder with Different Polymer Additives

Abstract

A wide variety of polymer additives have been widely used in recent years. However, the effect of different polymer additives on the durability of asphalt binders has not been investigated thoroughly. To evaluate the aging property of styrene-butadiene-styrene (SBS) asphalt binder with different polymer additives, three polymer modifiers, namely high modulus modifier (HMM), anti-rutting agent (ARA), and high viscosity modifier (HVM), were added to it. First, the Thin Film Over Test (TFOT) and Pressure Aging Vessel (PAV) was performed on the asphalt binders. The rheological properties of the four asphalt binders before and after aging were then checked by the Dynamic Shear Rheometer Test (DSR). The chemical compositions of the asphalt binders were determined by the Fourier Transform Infrared Spectrometer (FTIR) test. Several aging indicators were adopted to reflect the aging degree of the asphalt binders. The results show that when polymer additives are added to the SBS asphalt binder, the complex modulus, storage modulus, loss modulus, and rutting factor substantially increase and the phase angle decreases. All the test parameters become higher after aging. The phase angle of the SBS asphalt binder is the highest at both unaged and aged states, while its other parameters values are the smallest. Moreover, the Carbonyl Aging Indicator (CAI) of SBS with polymer additives becomes lower under both TFOT and PAV conditions, indicating that polymer additives can improve the aging resistance of SBS asphalt, of which HVM modifies the aging resistance best. Complex Modulus Aging Indicator (CMAI) and Storage Modulus Aging Indicator (SMAI) have the best correlation coefficients with CAI, and the two aging indicators can be used to predict the aging degree of polymer modified asphalt binders.

Study on the high-temperature and aging properties of agricultural waste-modified asphalt based on rheology

“…The close physical properties of the four AW powder, such as particle size and density, indicates that the addition of AW did not alter the molecular properties of SBSMA. Hence, the spectra of the modified asphalt binders are very similar to the original SBSMA binder [ 57 – 59 ]. In addition, no new characteristic absorption peak appeared.…”

Analysis of Modulus Properties of High-Modulus Asphalt Mixture and Its New Evaluation Index of Rutting Resistance

“…Zhu et al tested the dynamic modulus of HMAM prepared from low-grade asphalt with different reclaimed asphalt pavement (RAP) contents and found that HMAM with 40% content of RAP had the best modulus properties [25]. The mechanical properties of additive-based HMAM were also evaluated using the dynamic modulus index in studies by Ma [2], Xiao [26,27], Moghaddam [28], and other scholars, and it was found that the dynamic modulus of HMAM with high = modulus agent particles showed a large increase compared to SBS = modified asphalt and normal asphalt mixtures, and the increase in modulus was related to the additive brand, with the average value around 16 GPa [1,[29][30][31]. It can be seen that existing studies have only used the dynamic modulus for the evaluation of HMAM modulus performance, and the correlation between road performance and dynamic modulus of HMAM has not been clarified.…”

Influence of Gradation on the Mechanical Properties of Aged Hot-Mix Asphalts

“…Complete states of knowledge that are useful as background can be consulted in [1,4,[7][8][9]. A great portion of these studies have focused on modifying or improving asphalt binder properties (using polymers, additives, and rejuvenating agents of adherence enhancers, among others) [10][11][12][13]. On several occasions, some of these studies forget that HMAs are materials, whose properties depend on the interaction between asphalt binder-aggregate.…”