Flexural Performance of Alkali-Activated Slag Cements under Quasi-Static and Impact Loading
Publication: Journal of Materials in Civil Engineering
Volume 29, Issue 1
Abstract
Effects of silicate modulus (Ms) of an activator solution and the matrix components of alkali-activated slag cement (AASC) on the flexural parameters of AASC mortars were investigated under static and low-velocity impact loadings. AASC mixtures in two different Ms () ratios were prepared by the partial replacement of ground granulated blast-furnace slag (GGBFS) with fly ash (FA), metakaolin (MK), and silica fume (SF). Impact load was generated by a free-fall of a hammer onto the simply supported notched beams from different heights. Test results showed that SF-incorporating AASC had similar impact resistance to the control AASC mixture at all tested velocities while the MK-incorporating AASC had significantly lower impact resistance with an Ms ratio of 0.8. The increase of Ms ratio had a profound effect only in the MK series. The dynamic increase factors (DIF) in AASC mixtures increased with impact velocity. Dynamic increase factors were found to be higher in the AASC mixtures having porous and fissured microstructures than the well-packed and compact ones. AASC mixtures having similar quasi-static flexural performance to a portland cement mortar presented higher low-velocity impact resistance, fracture energy, and ductility index values under impact conditions.
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Acknowledgments
This study is a part of a research project supported by the Scientific and Technological Research Council of Turkey (TÜBİTAK, Project No: 112M262). The authors gratefully acknowledge the support provided by TÜBİTAK. In addition, the authors acknowledge Mr. Uğur Karabayraktar from KARCİMSA Cement Factory for the material support.
References
Asprone, D., Cadoni, E., Iucolano, F., and Prota, A. (2014). “Analysis of the strain-rate behavior of a basalt fiber reinforced natural hydraulic mortar.” Cem. Concr. Comp., 53(10), 52–58.
ASTM. (2002). “Standard specification for flow table for use in tests of hydraulic cement.” ASTM C230/C230-M-98, West Conshohocken, PA.
ASTM. (2004). “Standard test method for density, absorption, and voids in hardened concrete.” ASTM C642-97, West Conshohocken, PA.
Aydın, S. (2013). “A ternary optimisation of mineral additives of alkali activated cement mortars.” Constr. Build. Mater., 43(6), 131–138.
Aydın, S. (2010). “Development of a fiber reinforced composite with alkali activated ground granulated blast furnace slag.” Ph.D. thesis, Dept. of Civil Engineering, Dokuz Eylul Univ., İzmir, Turkey.
Bakharev, T., Sanjayan, J. G., and Cheng, Y. B. (1999). “Alkali activation of Australian slag cements.” Cem. Concr. Res., 29(1), 113–120.
Bakharev, T., Sanjayan, J. G., and Cheng, Y. B. (2002). “Sulfate attack on alkali-activated slag concrete.” Cem. Concr. Res., 32(2), 211–216.
Bakharev, T., Sanjayan, J. G., and Cheng, Y. B. (2003). “Resistance of alkali-activated slag concrete to acid attack.” Cem. Concr. Res., 33(10), 1607–1611.
Banthia, N., Mindess, S., Bentur, A., and Pigeon, M. (1989). “Impact testing of concrete using a drop-weight impact machine.” Exp. Mech., 29(1), 63–69.
Bazant, Z. P., and Planas, J. (1998). Fracture and size effect in concrete and other quasi-brittle materials, CRC Press, Boca Raton, FL.
Bernal, S. A. (2015). “Effect of the activator dose on the compressive strength and accelerated carbonation resistance of alkali silicate-activated slag/metakaolin blended materials.” Constr. Build. Mater., 98, 217–226.
Beygi, M. H. A., Kazemi, M. T., Nikbin, I. M., and Amiri, J. V. (2013). “The effect of water to cement ratio on fracture parameters and brittleness of self-compacting concrete.” Mater. Des., 50(9), 267–276.
Bindiganavile, V., Banthia, N., and Aarup, B. (2002). “Impact response of ultra-high-strength fiber-reinforced cement composite.” ACI Mater. J., 99(6), 543–548.
Cadoni, E. (2013). “Fracture behavior of concrete at high strain rate.” Proc., VIII Int. Conf. on Fracture Mechanics of Concrete and Concrete Structures (FraMCoS-8), Univ. of Castilla La-Mancha, Toledo, Spain.
CEB (Comité Euro-International du Béton). (1988). “Concrete structures under impact and impulsive loading.”, Lausanne, Switzerland.
Chakradhara, R. M., Bhattacharyya, S. K., and Barai, S. V. (2011). “Behaviour of recycled aggregate concrete under drop weight impact load.” Constr. Build. Mater., 25(1), 69–80.
Cheng, H., Lin, K. L., Cui, R., Hwang, C. L., Chang, Y. M., and Cheng, T. W. (2015). “The effects of molar ratio on the characteristics of alkali-activated waste catalyst-metakaolin based geopolymers.” Constr. Build. Mater., 95, 710–720.
Chiaia, B., Van Mier, J. G. M., and Vervuurt, A. (1998). “Crack growth mechanisms in four different concretes: Microscopic observations and fractal analysis.” Cem. Concr. Res., 28(1), 103–114.
Collins, F. G., and Sanjayan, J. G. (1999). “Workability and mechanical properties of alkali activated slag concrete.” Cem. Concr. Res., 29(3), 455–458.
Cusatis, G. (2011). “Strain-rate effects on concrete behavior.” Int. J. Impact Eng., 38(4), 162–170.
Dancygier, A., Katz, A., Yardımcı, M. Y., and Yankelevsky, D. Z. (2012). “Behavior of high ductility cement composite beams under low impact.” Int. J. Protect Struct., 3(2), 177–192.
Dey, V., Bonakdar, A., and Mobasher, B. (2014). “Low-velocity flexural impact response of fiber-reinforced aerated concrete.” Cem. Concr. Comp., 49(4), 100–110.
European Standard. (2006). “Methods of testing cement—Part 1: Determination of strength.” EN 196–1.
Fernandez-Jimenez, A., Palomo, J. G., and Puertas, F. (1999). “Alkali-activated slag mortars: Mechanical strength behavior.” Cem. Concr. Res., 29(8), 1313–1321.
Gao, K., et al. (2013). “Effect of nano- on the alkali-activated characteristics of metakaolin-based geopolymers.” Constr. Build. Mater., 48, 441–447.
Glukhovsky, V. D., and Pakhomov, V. A. (1978). Slag-alkali cements and concretes, Budivelnik Publishers, Kiev, Ukraine.
Gupta, T., Sharma, R. K., and Chaudhary, S. (2005). “Impact resistance of concrete containing waste rubber fiber and silica fume.” Int. J. Impact Eng., 83(9), 76–87.
Li, Z., and Liu, S. (2007). “Influence of slag as additive on compressive strength of fly ash-based geopolymer.” J. Mater. Civ. Eng., 470–474.
Malvar, L. J., and Ross, C. A. (1998). “Review of strain rate effects for concrete in tension.” ACI Mater. J., 95(6), 735–739.
Mindess, S., Banthia, N., and Yan, C. (1987). “Fracture toughness of concrete under impact loading.” Cem. Concr. Res., 17(2), 231–241.
Mindess, S., Young, J. F., and Darwin, D. (2003). Concrete, 2nd Ed., Prentice Hall, Upper Saddle River, NJ.
Mo, K. H., Yap, S. P., Alengaram, U. J., Jumaat, M. Z., and Bu, C. H. (2014). “Impact resistance of hybrid fibre-reinforced oil palm shell concrete.” Constr. Build. Mater., 50, 499–507.
Neville, A. M. (1995). Properties of concrete, Longman, New York.
Pu, X. C., Gan, C. C., Wang, S. D., and Yang, C. H. (1988). “Summary reports of research on alkali-activated slag cement and concrete.” Chongqing Institute of Architecture and Engineering, Chongqing, China.
Puertas, F., Amat, T., Fernandez-Jimenez, A., and Vazquez, T. (2003). “Mechanical and durable behaviour of alkaline cement mortars reinforced with polypropylene fibres.” Cem. Concr. Res., 33(12), 2031–2036.
Puertas, F., and Fernandez-Jimenez, A. (2003). “Mineralogical and microstructural characterisation of alkali-activated fly ash/slag pastes.” Cem. Concr. Comp., 25(3), 287–292.
Rao, G. A., and Prasad, B. K. R. (2002). “Fracture energy and softening behavior of high-strength concrete.” Cem. Concr. Res., 32(2), 247–252.
RILEM (International Union of Laboratories and Experts in Construction Materials, Systems and Structures). (1985). “Draft recommendation: Determination of the fracture energy of mortar and concrete by means of three point bend test on notched beams.” Mater. Struct., 18(4), 287–290.
Shi, C., Krivenko, P. V., and Roy, D. (2006). Alkali-activated cements and concretes, Taylor and Francis, New York.
Shi, C., and Xie, P. (1998). “Interface between cement paste and quartz sand in alkali-activated slag mortars.” Cem. Concr. Res., 28(6), 887–896.
Wang, N., Mindess, S., and Ko, K. (1996). “Fibre reinforced concrete beams under impact loading.” Cem. Concr. Res., 26(3), 363–376.
Yan, A., Wu, K. R., Zhang, D., and Yao, W. (2001). “Effect of fracture path on the fracture energy of high-strength concrete.” Cem. Concr. Res., 31(11), 1601–1606.
Zhang, X. X., Ruiz, G., and Yu, R. C. (2008). “A new drop weight impact machine for studying fracture process in structural concrete.” Anales de Mecanica de la Fractura, 25(2), 655–659.
Zhang, X. X., Ruiz, G., Yu, R. C., and Tarifa, M. (2009). “Fracture behavior of high-strength concrete at a wide range of loading rates.” Int. J. Impact. Eng., 36(10-11), 1204–1209.
Zivica, V. (2007). “Effects of type and dosage of alkaline activator and temperature on the properties of alkali-activated slag mixtures.” Constr. Build. Mater., 21(7), 1463–1469.
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Published In
Journal of Materials in Civil Engineering
Volume 29 • Issue 1 • January 2017
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© 2016 American Society of Civil Engineers.
History
Received: Jan 5, 2016
Accepted: May 27, 2016
Published online: Aug 12, 2016
Published in print: Jan 1, 2017
Discussion open until: Jan 12, 2017
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