Shrinkage behavior enhancement of infra-lightweight concrete through FRP grid reinforcement and development of their shrinkage prediction models

Liu, Yue and Tafsirojjaman, T. ORCID: https://orcid.org/0000-0002-4801-6744 and Dogar, Attiq Ur Rahman and Huckler, Alexander (2020) Shrinkage behavior enhancement of infra-lightweight concrete through FRP grid reinforcement and development of their shrinkage prediction models. Construction and Building Materials, 258:119649. pp. 1-12. ISSN 0263-8223

[img] Text (Accepted Version)
Shrinkage behavior enhancement of infra-lightweight concrete through FRP grid reinforcement and development of their shrinkage prediction models.pdf
Restricted - Available after 20 October 2022.


Abstract

Infra-lightweight concrete (ILC) is an efficient alternative of normal concrete (NC) for structural applications with low strength but high thermal performance requirements. Three types of ILCs with dry densities 600, 700 and 800 kg/m3 have been manufactured by using high water to cement ratio (w/c) and expanded clay lightweight aggregates (ECLAs). Experimental studies showed that shrinkage strains in ILCs can be up-to 1.51 mm/m as compared to 0.2–0.8 mm/m for NCs, which affects the structural durability of ILCs. To control shrinkage strains of ILCs, ILCs have been then reinforced with two types of fiber reinforced polymers (FRPs): carbon fiber reinforced polymer (CFRP) and glass fiber reinforced polymer (GFRP). For each type of FRP, two different grid arrangements of size 21 × 21 mm and 25 × 25 mm have been used. Although all FRP grid reinforcements are effective as they reduced the shrinkage strains significantly and close to the shrinkage strains of NCs, CFRP reinforcement with 25 × 25 mm grid is most effective as it reduced the shrinkage strains up-to the maximum level. Also, experimental shrinkage strains have been compared with five commonly used prediction models and it has been found that each model failed to accurately predict the shrinkage strains. Therefore, a new prediction model has been developed by modifying one of the existing model i.e. B3 model for shrinkage prediction of ILC which considers the effect of water content, compressive strength and dry density. Another prediction model for FRP reinforced ILCs has also been developed to incorporate the influence of any type of reinforcement in ILC. A comparison of modified prediction models with experimental results has shown that the models can predict shrinkage accurately and can be utilized for normal ILCs as well as reinforced ILCs.


Statistics for USQ ePrint 42061
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 03 Aug 2021 04:15
Last Modified: 09 Sep 2021 04:49
Uncontrolled Keywords: Infra-lightweight concrete (ILC), shrinkage strains, FRP reinforced ILC, shrinkage prediction model of ILC, shrinkage prediction model of reinforced ILC
Fields of Research (2008): 09 Engineering > 0905 Civil Engineering > 090599 Civil Engineering not elsewhere classified
09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
09 Engineering > 0905 Civil Engineering > 090504 Earthquake Engineering
Fields of Research (2020): 40 ENGINEERING > 4005 Civil engineering > 400506 Earthquake engineering
40 ENGINEERING > 4005 Civil engineering > 400599 Civil engineering not elsewhere classified
40 ENGINEERING > 4005 Civil engineering > 400510 Structural engineering
40 ENGINEERING > 4016 Materials engineering > 401602 Composite and hybrid materials
Identification Number or DOI: https://doi.org/10.1016/j.conbuildmat.2020.119649
URI: http://eprints.usq.edu.au/id/eprint/42061

Actions (login required)

View Item Archive Repository Staff Only