|Table of Contents|

Early decay characteristics of micro-texture of SMA-10 ultra-thin wearing course(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2026年2期
Page:
28-42
Research Field:
道路工程
Publishing date:

Info

Title:
Early decay characteristics of micro-texture of SMA-10 ultra-thin wearing course
Author(s):
REN Wan-yan1; 2; 3;  WANG Hao-quan1;  WANG Xin-ya1;  YANG Chen1;  WANG Jia-ni1; 2; 3
(1. School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture,Beijing 100044, China; 2. Future Urban Resilient Transportation Infrastructure Research Center,Beijing University of Civil Engineering and Architecture, Beijing 100044, China; 3. Beijing Urban Transportation Infrastructure Engineering Technology Research Center, Beijing University of Civil Engineering and Architecture, Beijing 100044, China)
Keywords:
pavement engineering;  ultra-thin wearing course;  SMA-10;  micro-texture decay;  integral of power spectral density;  fractal dimension;  skid resistance
PACS:
U416.217
DOI:
10.19721/j.cnki.1671-8879.2026.02.003
Abstract:
To address the problem of insufficient skid resistance of SMA-10 ultra-thin wearing course at early service stage, laboratory accelerated loading tests were carried out combined with 3D laser texture scanning and British pendulum number testing. The integral value of power spectral density and fractal dimension were used to characterize the micro-texture characteristics, and the British pendulum number was used to represent the skid resistance. The correlation between micro-texture and skid resistance of SMA-10 ultra-thin wearing course was systematically investigated, and the effects of asphalt viscoelasticity and mixture gradation on the micro-texture and skid resistance decay of SMA-10 ultra-thin wearing course were analyzed. The research results show that in the initial state, the correlation coefficient between the integral value of power spectral density and fractal dimension reaches 0.97, indicating an extremely strong correlation. However, their correlation coefficients with the British pendulum number are only 0.07-0.14. They cannot be directly used to evaluate the difference in the initial skid resistance of SMA-10 ultra-thin wearing course. During the loading process, the correlation coefficients of the three indicators are all greater than 0.7, showing a strong positive correlation. This suggests that the micro-texture evolution of SMA-10 ultra-thin wearing course can effectively reflect the decay trend of skid resistance. The effects of asphalt viscoelasticity and fine-to-coarse aggregate ratio on the micro-texture decay of SMA-10 ultra-thin wearing course exhibit obvious stage-specific characteristics. High-viscosity asphalt can delay the initial texture attenuation but aggravate the later attenuation. Moreover, the texture complexity represented by fractal dimension is retained, while the roughness characterized by the integral value of power spectral density is lost. This indicates that the asphalt viscoelasticity cannot fundamentally improve the skid resistance of SMA-10 ultra-thin wearing course. Increasing the fine aggregates can restrain the early deterioration but accelerate the middle stage attenuation, while increasing the coarse aggregates leads to rapid texture abrasion. Adjusting the fine-to-coarse aggregate ratio can only optimize the lower limit of skid resistance at early stage but cannot reverse the attenuation trend of skid resistance. The early decay of micro-texture in SMA-10 ultra-thin wearing course can be divided into three stages: an initial rapid decline, followed by a recovery to peak at the middle stage, and a continuous attenuation at the later stage.13 tabs, 15 figs, 37 refs.

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Last Update: 2026-04-20