Simulation analysis of rubber cement stabilization gravel dry shrinkage based on Fick's diffusion law
HAN Yanji
FENG Changbiao
LI Zhihao
DAI Guangwei
GUO Shiteng
Abstract：Most of the base cracks are caused by their own internal factors or the non-load stress gener-ated under the action of environmental temperature and humidity changes.Water diffusion forms a relative humidity gradient in cement-stabilized gravel,leading to uneven shrinkage of water-stabilized gravel.This paper considers the effect of water diffusion on rubber water-stabilized gravel,the early humidity field inside is simulated.The results show that the shrinkage of the beam model is smaller than the shrinkage of the suspended dense structure.The 15 d dry shrinkage of the cement stabilized gravel beam model is linearly reduced.The shrinkage was minimized when the rubber powder was 1.5％of the aggregate mass.When the rubber dosage is certain,the random polygon shrinkage resist-ance is the best,and the oval aggregate shrinkage resistance is the worst.Among the three particle si-zes,the rubber particles with 2 mm particle size have the best resistance to shrinkage,so it can be speculated that a reasonable rubber particle size range is the most beneficial for the shrinkage resist-ance of rubber water stabilized gravel.
Keywords：cement stabilized gravelrubber powderdry shrinkage performancewater diffusion
Publication Date：2025-10-01
Online Publishing Date：2025-09-22(First online date of this platform, not the publication date of the document)
Pages：6( 56-61 )