Characteristics of Ceramic Fiber Modified Asphalt Mortar

Abstract

Ceramic fiber, with a major composition of Al 2 O 3 and SiO 2 , has advantages of stability at relatively high temperature, big specific surface area and resistance to external mechanical vibration. It has the potential contribution of improving the rutting resistance and temperature sensitivity of modified asphalt binder by proper modification design. In this research, ceramic fiber was introduced into both pen 60/80 and pen 80/100 asphalt binder by different weight ratios. An asphalt penetration test, softening point test, ductility test and dynamic viscoelastic behavior were conducted to characterize and predict the ceramic fiber modified asphalt mortar (CFAM). Research results indicated that the ceramic fiber has a great effect on reinforcement of asphalt, which makes the asphalt stiffer so that the asphalt can only undertake less strain under the same stress. The heat insulation effect of the ceramic fiber will improve the temperature stability. Complex modulus and phase angle results indicate that the ceramic fiber can significantly enhance the high temperature resistance of soft binder.

Mechanical performance of fibers in hot mix asphalt: A review

“…Mineral fibers present a more rigid structure as compared to the more flexible carbon fibers [57]. In general, ceramic fibers present a smooth surface, so not requiring additional asphalt binder when they are added to the asphalt mixture [58]. Because of the shape, several fibers can interlock together and form a network with the asphalt, which results in stronger connections and lower risk of crack propagation.…”

“…Because of the shape, several fibers can interlock together and form a network with the asphalt, which results in stronger connections and lower risk of crack propagation. The fact that the images do not have coalescence should be taken into account as it means that the fibers can be distributed in asphalt binder homogenously [58]. Finally, Gao and Wu [59] stated that the lipophilicity of basalt fibers as well as their coating ability (by bitumen) are very strong.…”

Investigation of the Performance of Ceramic Fiber Modified Asphalt Mixture

“…e dynamic stability improves by 27.3% and the rut depth decreases by 23.1% compared with that of the asphalt mixtures with no fiber, indicating that CFs can significantly improve the high-temperature stability of asphalt mixtures. CFs in asphalt mixture can absorb light components of Advances in Civil Engineering asphalt and transform the free asphalt to structural asphalt; thus, the temperature sensitivity of asphalt is reduced and the stiffness of asphalt is enhanced [24]. Furthermore, the CFs form a three-dimensional network structure in asphalt mixture, which can limit the relative slippage of the aggregates and improve the deformation resistance of the asphalt mixture.…”

“…Furthermore, the CFs form a three-dimensional network structure in asphalt mixture, which can limit the relative slippage of the aggregates and improve the deformation resistance of the asphalt mixture. Compared with basalt fibers and glass fibers, CFs have lower thermal conductivity and lower density; therefore, CFs have good thermal stability and a larger specific surface area at the same content, thus mitigating heat transfer in asphalt mixtures and absorbing more light components of asphalt [24]. Figure 10 presents the Marshall stability, immersion Marshall stability, and immersion residual stability of asphalt mixtures with different CF contents.…”

“…Su et al [23] used the split Hopkinson pressure bar system to evaluate the dynamic properties of CF-reinforced concrete and found that ceramic fibers significantly enhanced the dynamic strength and elastic modulus of concrete. Wan et al [24] used CFs to modify asphalt binders and reported that the CFs enhanced the high-temperature stability and stiffness of the asphalt binder. Arabani et al [25] performed dynamic shear rheometer and bending beam rheometer tests and found that the addition of CFs significantly improved the high-temperature performance but slightly deteriorated the low-temperature performance of the asphalt binder.…”