Fractal characteristics of pore structure of hybrid Basalt-Polypropylene fibre-reinforced concrete

被引：125
作者：
Li, Dan [1 ]
Niu, Ditao [2 ]
Fu, Qiang [1 ,2 ]
Luo, Daming [1 ,2 ]
机构：
[1] Xian Univ Architecture & Technol, Sch Civil Engn, Xian 710055, Peoples R China
[2] Xian Univ Architecture & Technol, State Key Lab Green Bldg Western China, Xian 710055, Peoples R China
来源：
CEMENT & CONCRETE COMPOSITES | 2020年 / 109卷
基金：
中国国家自然科学基金;
关键词：
Pore characteristics; Basalt fibre; Polypropylene fibre; Pore surface fractal dimension; MERCURY INTRUSION POROSIMETRY; INTERFACIAL TRANSITION ZONE; NANO-MECHANICAL BEHAVIOR; CALCIUM SILICATE HYDRATE; SELF-COMPACTING CONCRETE; CEMENT-BASED MATERIALS; COMPRESSIVE STRENGTH; STEEL FIBER; TEXTURAL CHARACTERIZATION; IMAGE-ANALYSIS;
D O I：
10.1016/j.cemconcomp.2020.103555
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The pore characteristics of hybrid basalt-polypropylene fibre-reinforced concrete (HBPRC) are investigated using mercury intrusion porosimetry. The research results indicate that the cumulative pore volume of concrete increases with fibre addition. The pore surface fractal dimension (D-s) of HBPRC in gel, capillary, and large pore regions decreases sequentially although it has no physical characteristics in a transition pore region. The incorporation of fibres has an insignificant effect on D-s in gel and capillary pore regions; however, it has a reducing effect on D-s in the large pore region. Furthermore, the greater the concrete strength, the larger D-s becomes and the greater the reducing effect of fibres on D-s in the large pore region. Through microscopic and mesoscopic analyses, it has been suggested that bubbles introduced by fibres and the weak dispersion of such fibres are the main reasons for the deterioration of the large pore structure of HBPRC.
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页数：11
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