文献类型：期刊文献

英文题名：A Study on the Relationship Between the Pore Characteristics of High-Performance Self-Compacting Concrete (HPSCC) Based on Fractal Theory and the Function of the Water-Binder Ratio (W/C)

作者：Xu, Guihong He, Mingwei He, Li Chen, Yongsheng Duan, Li Jiao, Weiguo

第一作者：徐桂弘

通信作者：Xu, GH[1];He, MW[1]

机构：[1]Guizhou Inst Technol, Sch Civil Engn, Guiyang 550001, Peoples R China;[2]China Railway 11th First Grp Third Engn Co Ltd, Shiyan 442000, Peoples R China

第一机构：贵州理工学院土木工程学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Civil Engn, Guiyang 550001, Peoples R China.|贵州理工学院土木工程学院;贵州理工学院;

年份：2025

卷号：9

期号：2

外文期刊名：JOURNAL OF COMPOSITES SCIENCE

收录：Scopus(收录号：2-s2.0-85218693489);WOS:【ESCI(收录号:WOS:001430790200001)】；

基金：This research was funded by The Natural Science Foundation of Guizhou Province [Grant number: QIAN KE HEJICHU-ZK [2022]-027, ZK [2022]-170], the National Natural Science Foundation of China [Grant number: 52268065 and 52268053], and the Guizhou Province innovative high-level talent project [Grant number: QIAN KE HE Platform Talents-GCCQIAN KE [2023]053]. Thanks to Guizhou Yuanyuan Building Materials Co., Ltd. (Bijie, China) and Guizhou Province Rail Transit Infrastructure Operation & Maintenance (OM) and Digital Twin Applications (DTA) Team for their experimental support.

语种：英文

外文关键词：C80 high-performance self-compacting concrete (HPSCC); micropore; fractal dimension; compressive strength; water-binder ratio (W/C)

摘要：The mechanical properties of High-Performance Self-Compacting Concrete (HPSCC) are strongly influenced by its pore structure, but the impact of varying water-binder ratios (W/C) on this relationship remains unclear. To address this, the present study investigates HPSCC with W/C ratios ranging from 0.19 to 0.23, aiming to elucidate the connection between pore structure, fractal characteristics, and mechanical performance. Through a combination of compressive strength testing, low-temperature nitrogen adsorption, and Scanning Electron Microscopy (SEM) observations, this study reveals key insights. First, compressive strength initially increases with a decreasing W/C ratio but plateaus beyond W/C = 0.21, identifying an optimal range for balancing strength and workability. Second, the pore structure of HPSCC is characterized by cylindrical, ink-bottle, and planar interstitial pores, with significant fractal characteristics. Notably, the fractal dimension decreases as the W/C ratio increases, indicating reduced pore complexity and improved homogeneity. Finally, a strong linear correlation (R-2 > 0.9) between the W/C ratio, fractal dimension, and compressive strength provides a predictive tool for assessing HPSCC performance. This study concludes that the internal pore structure is a critical determinant of HPSCC strength, and the identified optimal W/C ratio range offers guidance for mixture designs. Additionally, fractal dimension analysis emerges as a novel method to evaluate HPSCC's microstructural quality, enabling predictions of long-term performance and durability. These findings contribute to the scientific basis for designing high-performance concrete materials with improved mechanical properties and durability.