High performance cementitious composite from alkali-activated ladle slag reinforced with polypropylene fibers

被引：82

作者：

Hoang Nguyen ^{[1
]}

Carvelli, Valter ^{[2
]}

Adesanya, Elijah ^{[1
]}

Kinnunen, Paivo ^{[1
,3
]}

Illikainen, Mirja ^{[1
]}

机构：

[1] Univ Oulu, Fibre & Particle Engn Unit, Pentti Kaiteran Katu 1, Oulu 90014, Finland

[2] Politecn Milan, Dept ABC, Piazza Leonardo Da Vinci 32, I-20133 Milan, Italy

[3] Imperial Coll London, Dept Civil & Environm Engn, London SW7 2BU, England

来源：

CEMENT & CONCRETE COMPOSITES | 2018年 / 90卷

关键词：

Alkali-activated slag; Polypropylene fiber; High-performance concrete; Mechanical properties; Strain hardening; STRAIN-HARDENING BEHAVIOR; MECHANICAL-PROPERTIES; GEOPOLYMER COMPOSITES; FRACTURE-MECHANICS; MATRIX DESIGN; CONCRETE; STEEL; MODEL; ECC;

D O I：

10.1016/j.cemconcomp.2018.03.024

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Alkali-activated ladle slag (AALS) is a promising cementitious material with environmental benefits. However, the brittleness of material has been limiting the use in construction. Therefore, in this experimental investigation, different polypropylene (PP) fibers were employed as a short randomly reinforcement in cementitious matrix in order to improve mechanical performance of the AALS composites. The study reveals that the AALS composite could gain very high ductility with an appropriate fibrous reinforcement. Fracture energy and fracture toughness of PP fiber reinforced AALS mortars increased by approximately 150 and 7.6 times, respectively, compared to the unreinforced material. Additionally, the flexural strength of the composite increased by roughly 300%. Pseudo strain hardening (PSH) behavior was observed along with multiple cracks under uniaxial tensile test. Scanning electron microscope (SEM) images confirmed the local fiber bridging effect, which resulted in the high mechanical performance of the PP-reinforced AALS.

引用

页码：150 / 160

页数：11

共 65 条

[1] Alkali Activation of Ladle Slag from Steel-Making Process [J].