A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Durability Evaluation of Inorganic Micro Powder-Modified Asphalt and Its Mixtures
The effects of inorganic micro powder particle size and type on the water stability, low-temperature crack resistance, and fatigue performance of asphalt and its mixtures were evaluated through various tests, including asphalt foundation, freeze–thaw splitting, low-temperature bending beam, and indirect tensile fatigue tests. The evaluation results show that the addition of inorganic micro powder particles, specifically, hydrated lime and cement, resulted in significant improvement of the asphalt mixture splitting strengths and freeze–thaw splitting strength ratio. Moreover, a decrease in the additive particle size increased its specific surface area, further enhancing the asphalt mixture splitting strength and freeze–thaw splitting strength ratio. Under the same stress level, the smaller the additive particle size, the better the fatigue performance of the asphalt mixture. Although micro powder particles have an adverse effect on the low-temperature performance of asphalt mixtures, this effect gradually decreases with the micro powder particle size. Furthermore, compared with cement, hydrated lime exhibited better fatigue performance but poor water stability.
Durability Evaluation of Inorganic Micro Powder-Modified Asphalt and Its Mixtures
The effects of inorganic micro powder particle size and type on the water stability, low-temperature crack resistance, and fatigue performance of asphalt and its mixtures were evaluated through various tests, including asphalt foundation, freeze–thaw splitting, low-temperature bending beam, and indirect tensile fatigue tests. The evaluation results show that the addition of inorganic micro powder particles, specifically, hydrated lime and cement, resulted in significant improvement of the asphalt mixture splitting strengths and freeze–thaw splitting strength ratio. Moreover, a decrease in the additive particle size increased its specific surface area, further enhancing the asphalt mixture splitting strength and freeze–thaw splitting strength ratio. Under the same stress level, the smaller the additive particle size, the better the fatigue performance of the asphalt mixture. Although micro powder particles have an adverse effect on the low-temperature performance of asphalt mixtures, this effect gradually decreases with the micro powder particle size. Furthermore, compared with cement, hydrated lime exhibited better fatigue performance but poor water stability.
Durability Evaluation of Inorganic Micro Powder-Modified Asphalt and Its Mixtures
Xiaodong Jia (author) / Naixing Liang (author) / Yiwen Peng (author)
2022
Article (Journal)
Electronic Resource
Unknown
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