Prefabiracted geopolymer concrete sandwich wall with FRP shear connectors for building construction

Jian-Guo Dai

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic research


Prefabricated concrete sandwich panels (PCSP), consisting of two concrete wythes and a thermal insulation layer in between, have great potential in use for industrialized building construction. This presentation is concerned with a research project on the development of a new precast sandwich concrete wall system, for which the two exterior wythes are made of geopolymer concrete while the composite action is realized through the use of fiber-reinforced polymer (FRP) shear connectors. The work reported here includes three aspects: (1) evaluation and optimization of the performance of FRP shear connectors; (2) tests on the stiffness and strength performance of FRP/steel reinforced geopolymer concrete slabs; and (3) composite action of geopolymer sandwich wall panels. Both experimental and analytical results demonstrated the efficiency of FRP tubular shear connectors, which have been newly developed in the presenter’s research group. The FRP/steel reinforced geopolymer concrete slabs were found to exhibit similar structural performance with their Portland cement concrete counterparts. As a consequent, the PCSP system developed based on the FRP tubular shear connectors and the reinforced geopolymer concrete wythes could exhibit satisfactory composite action in terms of both the strength and the stiffness. Due to its low carbon and durable feature in addition to its thermal and structural efficiency, the developed PCSP system is expected to have wider applications in prefabricated building industry which is now very popular in Hong Kong as well as the rest of China.
Original languageEnglish
Title of host publicationRAIS, Proceedings of the RISUD Annual International Symposium 2017
Subtitle of host publicationNew Frontiers in Urban Development
EditorsJ.G. Teng, X.L. Ding, Geoffrey Q.P. Shen
PublisherThe Hong Kong Polytechnic University
Number of pages1
ISBN (Print)978-988-14480-4-0
Publication statusPublished - 2017
EventRISUD Annual International Symposium 2017 - Hong Kong, China
Duration: 24 Aug 201725 Aug 2017


Forum/SymposiumRISUD Annual International Symposium 2017
Abbreviated titleRAIS2017
CityHong Kong


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