Short Fiber Reinforced Geopolymer Composites Manufactured by Extrusion
Publication: Journal of Materials in Civil Engineering
Volume 17, Issue 6
Abstract
Geopolymer composites reinforced with short polyvinyl alcohol (PVA) fibers have been manufactured using the extrusion technique. The extruded products were thin plates with thickness. It was demonstrated that short fiber reinforced geopolymer composites (SFRGCs) could be extruded without additional rheological modifier. Bending tests have been conducted with the extruded samples to investigate their mechanical properties. The fiber failure patterns in SFRGCs with various formulations were examined by scanning electron microscope and energy dispersive x-ray analysis techniques. The experimental results showed that the addition of PVA fiber could largely increase the ductility of SFRGCs, resulting in fiber failure modes changing from brittle to ductile. The effects of varying the amount of fly ash on the flexural behavior of various SFRGCs were also investigated. The SFRGCs incorporating small percentage of fly ash showed higher flexural strengths but smaller defections, while the SFRGCs incorporating a large percentage of fly ash had lower flexural strengths, but larger deflections. This could be attributed to the change of the bonding between fiber and matrix that led the change of failure mode from fiber fracture to fiber pullout.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgment
The financial support from Hong Kong Research Grant Council under Grant No. UNSPECIFIEDHKUST 6226/01E is gratefully acknowledged.
References
Akkaya, Y., Peled, A., and Shah, S. P. (2000). “Parameters related to fiber length and processing in cement composites.” Mater. Struct., 33(232), 515–524.
American Society for Testing and Materials (ASTM). (2003). “ASTM C947-97 Standard test method for flexural properties of thin-section glass-fiber-reinforced concrete (using simple beam with third-point loading).” Annual Book of ASTM Standards, ASTM C947-97, 04(05), Philadelphia, 626–628.
Benbow, J., and Bridgwater, J. (1993). Paste flow and extrusion, Clarendon Oxford, U.K., 153–153.
Corina, A., Marikunte, S., and Shah, S. P. (1998). “Extruded fiber reinforced cement pressure pipe.” Adv. Cem. Based Mater., 8(2), 47–55.
Davidovits, J. (1988). “Geopolymer chemistry and properties.” Proc., 1st European Conf. on Soft Mineralogy, J. Davidovits and J. Orlinsl, eds., Vol. 1, The Geopolymer Institute, Compiegne, France, 25–48.
Davidovits, J. (1989). “Geopolymers and geopolymeric new materials.” J. Therm. Anal., 35(2), 429–441.
Davidovits, J. (1993). “Geopolymer cement to minimize carbon-dioxide greenhouse-warming.” M. Moukwa, S. L. Sarkar, K. Luke, and M. W. Grutzeck eds., Cement-based materials: present, future, and environmental aspects, ceramic transactions, Vol. 37, American Ceramic Society, Westerville, 165–182.
Davidovits, J. (1994a). “High alkali cements for 21st Century concretes.” Concrete technology, past, present, and future, SP-144, K. Mehta, ed., American Concrete Institute, Detroit, 383–397.
Davidovits, J. (1994b). “Properties of geopolymer cement.” Proc., 1st Int. Conf. on Alkaline Cements and Concretes, F. Škvára, ed., Scientific Research Institute on Binders and Materials, Kiev State Technical Univ., Kiev, Ukraine, 131–149.
Davidovits, J., and Davidovits, M. (1991). “Geopolymer: Ultrahigh-temperature tooling material for the manufacture of advanced composites.” R. Adsit and F. Gordaninejad, eds., Proc., 36th Ann. SAMPE Symp. and Exhibition, Vol. 36, Covina, Calif., 1939–1949.
Igarashi, S., Bentur, A., and Mindess, S. (1996). “The effect of processing on the bond and interfaces in steel fiber reinforced cement composites.” Cem. Concr. Compos., 18(5), 313–322.
Li, Z., and Mu, B. (1998). “Application of extrusion for manufacture of short fiber reinforced cementitious composite.” J. Mater. Civ. Eng., 10(1), 2–4.
Li, Z., Mu, B., and Chui, St. N. C. (1999). “Systematic study of properties of extrudates with incorporated metakaolin or silica fume.” ACI Mater. J., 96(5), 574–579.
Li, Z., Mu, B., and Chui, St. N. C. (2001). “Static and dynamic behavior of extruded sheets with short fibers.” J. Mater. Civ. Eng., 13(4), 248–254.
Lyon, R. E., Foden, A., Balaguru, P. N., Davidovits, M., and Davidovits, J. (1997). “Fire-resistant aluminosilicate composites.” Fire Mater., 21(2), 67–73.
Peled, A., Cyr, M. F., and Shah, S. P. (2000). “High content of fly ash (Class F) in extruded cementitious composites.” ACI Mater. J., 97(5), 509–517.
Peled, A., and Shah, S. P. (2003). “Processing effects in cementitious composites: Extrusion and casting.” J. Mater. Civ. Eng., 15(2), 192–199.
Shao, Y., Qin, J., and Shah, S. P. (2001). “Microstructure of extruded cement-bonded fiberboard.” Cem. Concr. Res., 31(8), 1153–1161.
Shao, Y., and Shah, S. P. (1997). “Mechanical properties of PVA fiber reinforced cement composites fabricated by extrusion processing.” ACI Mater. J., 94(6), 555–564.
Zhou, X., and Li, Z., (2004). “Characterization of rheology of fresh fiber reinforced cementitious composites through ram extrusion.” Mater. Struct., in press.
Information & Authors
Information
Published In
Copyright
© 2005 ASCE.
History
Received: Jul 27, 2004
Accepted: Dec 21, 2004
Published online: Dec 1, 2005
Published in print: Dec 2005
Notes
Note. Associate Editor: Kiang-Hwee Tan
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.