The flexural behaviors and mechanism of wollastonite microfiber modified ultra-high performance concrete with steel fiber from micro to macro scale

• Autorzy: Zeng Deming , Cao Mingli

Identyfikatory

DOI

10.1007/s43452-021-00340-1

• Języki publikacji: EN

Abstrakty

EN

Wollastonite microfiber (WF) is a naturally occurring calcium silicate (CaSiO3) produced in fibrous form and often used in ceramic industry as a cheap and valuable mineral. It is tried to be applied in ultra-high performance concrete (UHPC) in this study with expectation to improve the flexural performance and compensate for the deficiencies of steel fiber in enhancing UHPC from micro scale. The effects of WF on the flexural behaviors of UHPC with or without steel fibers were explored. The bonding behaviors of steel fiber in WF-modified ultra-high performance concrete (WFMUHPC) under different curing conditions were researched combined with single fiber pull-out tests. The results showed that WFs could significantly resist and delay the formation of microcracks in UHPC. When WFs were added to UHPC with steel fiber, the flexural properties of concrete were significantly improved from micro to macro scale. Accelerated curing contributed to the flexural strengths but deteriorate the toughness of WFMUHPC with steel fiber. The presented load–deflection curves proved that WFs had a significant improvement of first crack load and there were post-peak curve gaps because of the reinforcing effect of WFs on the frictional sliding behavior of steel fiber. The results of X-ray diffraction and scanning electron microscope showed that WFs had the bridging and filling effect and improved the interfacial transition zone between WFs and matrix. Meanwhile, the combined effect between WFs and high temperature that WFs provided sites for hydration products from cement particles and active minerals including silica fume and fly ash further improved the flexural behaviors. Moreover, a flexural strength model established could accurately describe the reinforcing effect of WFs on this particular UHPC and was expected to provide guidance for practical engineering applications.

Słowa kluczowe

EN

wollastonite microfiber; ultra-high performance concretes; flexural behavior; single fiber pull-out test; reinforcing mechanisms; strength model

PL

mikrofibra; beton; zgniatanie; model wytrzymałościowy

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2022
• Tom: Vol. 22, no. 1
• Strony: art. no. e32, 2022
• Opis fizyczny: Bibliogr. 31 poz., rys., tab., wykr.

Twórcy

autor

Zeng Deming

• School of Civil Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China

autor

Cao Mingli

• School of Civil Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China

• https://orcid.org/0000-0002-5320-4993

Bibliografia

• 1. de Larrard F, Sedran T. Optimization of ultra-high-performance concrete by the use of a packing model. Cem Concr Res. 1994;24(6):997–1009.
• 2. Shen P, Lu L, He Y, Wang F, Lu J, Zheng H, et al. Investigation on expansion effect of the expansive agents in ultra-high performance concrete. Cem Concr Compos. 2020;105:103425.
• 3. Su Y, Li J, Wu C, Wu P, Li Z. Influences of nano-particles on dynamic strength of ultra-high performance concrete. Compos Pt B Eng. 2016;91:595–609.
• 4. Dong S, Zhou D, Ashour A, Han B, Ou J. Flexural toughness and calculation model of super-fine stainless wire reinforced reactive powder concrete. Cem Concr Compos. 2019;104:103367.
• 5. Wu Z, Shi C, He W, Wu L. Effects of steel fiber content and shape on mechanical properties of ultra high performance concrete. Constr Build Mater. 2016;103:8–14.
• 6. Dugat J, Roux N, Bernier G. Mechanical properties of modified reactive powder concrete. Mater Struct. 1996;29(5):233–40.
• 7. Yu R, Spiesz P, Brouwers HJH. Static properties and impact resistance of a green ultra-high performance hybrid fibre reinforced concrete (UHPHFRC): experiments and modeling. Constr Build Mater. 2014;68:158–71.
• 8. Li Y, Yang EH, Tan KH. Flexural behavior of ultra-high performance hybrid fiber reinforced concrete at the ambient and elevated temperature. Constr Build Mater. 2020;250:118487.
• 9. He B, Zhu X, Ren Q, Jiang Z. Effects of fibers on flexural strength of ultra-high-performance concrete subjected to cryogenic attack. Constr Build Mater. 2020;265:120323.
• 10. Reda MM, Shrive NG, Gillott JE. Microstructural investigation of innovative UHPC. Cem Concr Res. 1999;29:323–9.
• 11. Sbia LA, Peyvandi A, Soroushian P, Lu J, Balachandra AM. Enhancement of ultra high performance concrete material properties with carbon nanofiber. Adv Civ Eng. 2014;2014:1–10.
• 12. Jung M, Park J, Hong S, Moon J. Electrically cured ultra-high performance concrete (UHPC) embedded with carbon nanotubes for field casting and crack sensing. Mater Des. 2020;196:109127.
• 13. Wille K, Kim DJ, Naaman AE. Strain-hardening UHP-FRC with low fiber contents. Mater Struct. 2011;44:583–98.
• 14. Azarov GM, Maiorova EV, Oborina MA, Belyakov AV. Wollastonite raw materials and their applications (a review). Glass Ceram. 1995;52:9–10.
• 15. ASTM C1437/C1437−15. Standard test method for flow of hydraulic cement Mortar. American Society of Testing and Materials, 2007. pp. 1–2.
• 16. CECS Standard (2009) Standard test methods for fiber reinfored concrete, CECS 21:2009, China (in Chinese).
• 17. JCI-SF. Methods of tests for flexural strength and flexural toughness of fiber reinforced concrete, JCI standards for test methods of fiber reinforced concrete. Japan Concrete Institute, Japan; 1983. pp. 45–51.
• 18. Cao YYY, Yu QL. Effect of inclination angle on hooked end steel fiber pullout behavior in ultra-high performance concrete. Compos Struct. 2018;201:151–60.
• 19. Wille K, Naaman AE. Pullout behavior of high-strength steel fibers embedded in ultra-high-performance concrete. Aci Mater J. 2012;109(4):479–88.
• 20. Ding X, Zhao M, Li C, Li J, Zhao X. A multi-index synthetical evaluation of pull-out behaviors of hooked-end steel fiber embedded in mortars. Constr Build Mater. 2021;276:122219.
• 21. Lee Y, Kang S, Kim J. Pullout behavior of inclined steel fiber in an ultra-high strength cementitious matrix. Constr Build Mater. 2010;24:2030–41.
• 22. Li L, Cao M, Yin H. Comparative roles between aragonite and calcite calcium carbonate whiskers in the hydration and strength of cement paste. Cem Concr Compos. 2019;104:103350.
• 23. Krahl PA, de Miranda Saleme Gidrão G, Neto RB, Carrazedo R. Effect of curing age on pullout behavior of aligned and inclined steel fibers embedded in UHPFRC. Constr Build Mater. 2021;266:121188.
• 24. Deng F, Ding X, Chi Y, Xu L, Wang L. The pull-out behavior of straight and hooked-end steel fiber from hybrid fiber reinforced cementitious composite: experimental study and analytical modelling. Compos Struct. 2018;206:693–712.
• 25. Zhang R, Cheng X, Hou P, Ye Z. Influences of nano-TiO 2 on the properties of cement-based materials: hydration and drying shrinkage. Constr Build Mater. 2015;81:35–41.
• 26. Helmi M, Hall MR, Stevens LA, Rigby SP. Effects of high-pressure/temperature curing on reactive powder concrete microstructure formation. Constr Build Mater. 2016;105:554–62.
• 27. Mao J, Zhang HC. Effect of curing regime on mechanical properties of reactive powder concrete. Low Temp Archit Technol. 2011;7:9–10.
• 28. Huang H, Gao X, Khayat KH. Contribution of fiber alignment on flexural properties of UHPC and prediction using the composite theory. Cem Concr Compos. 2021;118:103971.
• 29. Kang ST, Lee BY, Kim J, Kim YY. The effect of fibre distribution characteristics on the flexural strength of steel fibre-reinforced ultra high strength concrete. Constr Build Mater. 2011;25:2450–7.
• 30. Hannant P. Fiber cements and fiber concretes. Chichester: Wiley; 1978.
• 31. Han B, Dong S, Ou J, Zhang C, Wang Y, Yu X, et al. Microstructure related mechanical behaviors of short-cut super-fine stainless wire reinforced reactive powder concrete. Mater Des. 2016;96:16–26.

Uwagi

PL

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023)