Steel fiber reinforced geopolymer matrix (S-FRGM) composites applied to reinforced concrete structures for strengthening applications: A preliminary study

被引：69

作者：

Carabba, Lorenza ^{[1
]}

Santandrea, Mattia ^{[2
]}

Carloni, Christian ^{[2
]}

Manzi, Stefania ^{[1
]}

Bignozzi, Maria Chiara ^{[1
]}

机构：

[1] Univ Bologna, Dept Civil Chem Environm & Mat Engn, Via Terracini 28, I-40131 Bologna, Italy

[2] Univ Bologna, Dept Civil Chem Environm & Mat Engn, Viale Risorgimento 2, I-40136 Bologna, Italy

来源：

COMPOSITES PART B-ENGINEERING | 2017年 / 128卷

关键词：

Geopolymer; Fly ash; Fiber -reinforced cementitious matrix; Bond; FLY-ASH; BOND BEHAVIOR; OPC; PERFORMANCE; MORTARS;

D O I：

10.1016/j.compositesb.2017.07.007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Steel fiber reinforced geopolymer matrix (S-FRGM) composites are explored as a new tool in strengthening applications of reinforced concrete (RC) structures. The suitability of fly ash geopolymers as the matrix employed in S-FRGMs is investigated in this paper. Geopolymer matrix is used to embed galvanized steel fibers and bond the composite to a concrete substrate. By varying the molar concentration of the NaOH activating solution, three different geopolymer matrices are obtained and the influence of the alkaline environment on the bond behavior between fibers and matrix is examined. Physical, mechanical, and microstructural properties of the three matrices are measured and related to the interfacial bond behavior of S-FRGM-concrete joints. Results show that the decrease of the molar concentration of the NaOH activating solution leads to an increase of the interfacial bond behavior between matrix and fibers, which in turn improves the effectiveness of the composite action of the strengthening system. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：83 / 90

页数：8

共 41 条

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