Comparative study of different cement-based inorganic pastes towards the development of FRIP strengthening technology

Jianguo Dai, Sarfraz Munir, Zhu Ding

Research output: Journal article publicationJournal articleAcademic researchpeer-review

35 Citations (Scopus)

Abstract

The development of fiber-reinforced inorganic polymer (FRIP) composites for strengthening reinforced concrete (RC) structures has become an active field of research in recent years. Compared with fiber-reinforced polymer (FRP) strengthening systems, a FRIP strengthening system possesses improved fire resistance but its performance depends largely on appropriate inorganic paste selection. This paper presents a comparative study of four typical inorganic pastes, made from the following: (1) magnesium phosphate cement (MPC), (2) magnesium oxychloride cement (MOC), (3) geopolymer (GP) cement (i.e., alkali-activated slag cement), and (4) polymer-modified mortar (PMM). The aim was to investigate their performance both as a matrix and bonding adhesive for FRIP strengthening systems. The evaluated performance included the workability and mechanical properties of inorganic pastes, the bonding strength of these pastes with both a concrete substrate and dry fiber sheets, the tensile properties of the formed FRIP composites, and the flexural strength of FRIP-strengthened concrete beams. The microstructures of the four types of inorganic matrix and the fiber-to-matrix interface were also examined. The MPC-based and MOC-based inorganic pastes exhibit similar structural performance as commercially available PMM and are well-suited for the development of FRIP strengthening technology. Geopolymer seems to be the most brittle among the four studied inorganic pastes.
Original languageEnglish
Article numberA4013011
JournalJournal of Composites for Construction
Volume18
Issue number3
DOIs
Publication statusPublished - 1 Jun 2014

Keywords

  • Concrete structures
  • Fiber-reinforced inorganic polymer (FRIP)
  • Geopolymer (GP)
  • Magneisum phosphate cement (MPC)
  • Magnesium oxychloride cement (MOC)
  • Polymer-modified mortar (PMM)
  • Strengthening

ASJC Scopus subject areas

  • Ceramics and Composites
  • Civil and Structural Engineering
  • Building and Construction
  • Mechanics of Materials
  • Mechanical Engineering

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