Ultrasonic Shear Wave Reflection Method for Direct Determination of Porosity and Shear Modulus in Early-Age Cement Paste and Mortar
Publication: Journal of Engineering Mechanics
Volume 142, Issue 9
Abstract
An ultrasonic technique for measuring reflection of horizontally polarized shear (SH) waves at different angles of incidence from early-age hydrating mortar and cement paste is described. Measurements from mortar with varying sand content are presented. A poroelastic formulation for predicting wave reflection from hydrating mortar, which considers mortar as a two-phase, water-filled solid skeleton, is developed. In this representation, the solid phase in early-age hydrating mortar consists of sand, products of hydration and unhydrated cement. Reflection at the mortar interface is predicted using the poroelastic theory. Changes in the reflected amplitude of SH waves are used to obtain changes in the water-filled pore space and the shear modulus of the porous skeleton within the two-phase poroelastic idealization. The water-filled pore space in mortar is identified with the porosity in the two-phase poroelastic material. The porosity of mortar obtained from the poroelastic idealization when referring to the volume of cement paste within the mortar is comparable to the results obtained by directly applying the two-phase idealization to cement paste with identical water-to-cement ratio. The reflection of SH waves is strongly influenced by the absolute porosity of the material at any given time. A methodology for real-time, nondestructive monitoring of evolution of porosity in hydrating cement paste and mortar is established.
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References
Achenbach, J. D., Komsky, I. N., Lee, Y. C., and Angel, Y. C. (1992). “Self-calibrating ultrasonic technique for crack depth measurement.” J. Nondestruct. Eval., 11(2), 103–108.
Akkaya, Y., Voigt, T., Subramaniam, K. V., and Shah, S. P. (2003). “Nondestructive measurement of concrete strength by an ultrasonic wave reflection method.” Mater. Struct., 36(262), 507–514.
Bernard, O., Ulm, F. J., and Lemarchand, E. (2003). “A multiscale micromechanics-hydration model for the early-age elastic properties of cement-based materials.” Cem. Concr. Res., 33(9), 1293–1309.
Berryman, J. (1980). “Confirmation of Biot theory.” Appl. Phys. Lett., 37(4), 382.
Biot, M. (1956a). “Theory of propagation of elastic waves in a fluid-saturated porous solid. I. Low-frequency range.” J. Acoust. Soc. Am., 28(8), 168–178.
Biot, M. (1956b). “Theory of propagation of elastic waves in a fluid-saturated porous solid. II. Higher frequency range.” J. Acoust. Soc. Am., 28(2), 179.
Biot, M. (1962). “Mechanics of deformation and acoustic propagation in porous media.” J. Appl. Phys., 33(4), 1482.
Chung, C.-W., Suraneni, P., Popovics, J. S., and Struble, L. J. (2012). “Setting time measurement using ultrasonic wave reflection.” ACI Mater. J., 109(1), 109–118.
Cui, L., and Cahyadi, J. H. (2001). “Permeability and pore structure of OPC paste.” Cem. Concr. Res., 31(2), 277–282.
Hansen, T. C. (1986). “Physical structure of hardened cement paste, a classical approach.” Mater. Struct., 19(6), 423–436.
Johnson, D., and Plona, T. (1982). “Acoustic slow waves and the consolidation transition.” J. Acoust. Soc. Am., 72(2), 556.
Öztürk, T., Rapoport, J., Popovics, J. S., and Shah, S. P. (1999). “Monitoring the setting and hardening of cement-based materials with ultrasound.” Concr. Sci. Eng., 1(2), 83–91.
Plona, T. (1980). “Observation of a second bulk compressional wave in a porous medium at ultrasonic frequencies.” Appl. Phys. Lett., 36(4), 259.
Popovics, J. S., and Subramaniam, K. V. (2015). “Review of ultrasonic wave reflection applied to early-age concrete and concrete cementitious materials.” J. Nondestruct. Eval., 34(1), 266–278.
Powers, T. C. (1958). “Structure and physical properties of hardened Portland cement paste.” J. Am. Ceram. Soc., 41(1), 1–6.
Powers, T. C., and Brownyard, T. L. (1947). “Studies of the physical properties of hardened Portland cement paste.” ACI J., 18(8), 972–990.
Rapaport, J. R., Subramaniam, K. V., Popovics, J. P., and Shah, S. P. (2000). “Using ultrasound to monitor the stiffening of concrete with admixtures.” ACI Mater. J., 97(6), 675–683.
Stepišnik, J., Lukač, M., and Kocuvan, I. (1981). “Measurement of cement hydration by ultrasonics.” Ceram. Bull., 60(4), 481–483.
Subramaniam, K. V., and Lee, J. (2007). “Ultrasonic assessment of early-age changes in the material properties of cementitious materials.” Mater. Struct., 40(3), 301–309.
Subramaniam, K. V., Lee, J., and Christensen, B. (2005). “Monitoring the setting behavior of cementitious materials using one-sided ultrasonic measurements.” Cem. Concr. Res., 35(5), 850–857.
Subramaniam, K. V., Mohsen, J. P., Shaw, C., and Shah, S. P. (2002). “An ultransonic technique for monitoring concrete strength gain at early ages.” ACI Mater. J., 99(5), 458–462.
Subramaniam, K. V., and Wang, X. (2010). “An investigation of microstructure evolution in hydrating cement paste through setting using ultrasonic and rheological measurements.” Cem. Concr. Res., 40(1), 33–44.
Ulm, F. J., Constantinides, G., and Heukamp, F. H. (2004). “Is concrete a poromechanics material?—A multiscale investigation of poroelastic properties.” Mater. Struct., 37(265), 43–58.
Valič, M. I. (2000). “Hydration of cementitious materials by pulse echo USWR method, apparatus and application examples.” Cem. Concr. Res., 30(10), 1633–1640.
Valič, M. I., and Stepišnik, J. (1998). “A study of hydration of cement pastes by reflection of ultrasonic shear waves. Part I: Apparatus, experimental method and application examples.” Kovine Zlitine Tehnologije, 32(6), 551–560.
Valič, M. I., and Stepišnik, J. (1999). “Applications of pulsed USWR method for materials studies.” Kovine Zlitine Tehnologije, 33(5), 341–344.
Valič, M. I., Stepišnik, J., Gabrijelčič, M., Vuk, T., and Reščič, L. (1999). “Setting times measurements of Portland cements with pulsed USWR method.” Kovine Zlitine Tehnologije, 33(1–2), 83–86.
Voigt, T., Akkaya, Y., and Shah, S. P. (2002). “Determination of early age concrete strength by a reflective ultrasonic technique.” Proc., 6th Int. Symp. on Utilization of High Strength/High Performance Concrete, G. König, F. Dehn, and T. Faust, eds., Leipzig, Germany, 1489–1501.
Voigt, T., and Shah, S. P. (2004). “Properties of early age Portland cement mortar monitored with a shear wave reflection method.” ACI Mater. J., 101(6), 473–482.
Wang, X., and Subramaniam, K. V. (2011). “An ultrasonic procedure for continuous monitoring of capillary porosity and elastic properties in hydrating cement paste.” Cem. Concr. Compos., 33(3), 389–401.
Wang, X., Subramaniam, K. V., and Lin, F. (2010). “Ultrasonic measurement of viscoelastic shear modulus development in hydrating cement paste.” Ultrasonics, 50(7), 726–738.
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© 2016 American Society of Civil Engineers.
History
Received: Jul 25, 2015
Accepted: Mar 14, 2016
Published online: May 5, 2016
Published in print: Sep 1, 2016
Discussion open until: Oct 5, 2016
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