Dynamic elastic modulus of cement paste at early age based on nondestructive test and multiscale prediction model

Abstract

This paper introduced a nondestructive testing method to evaluate the dynamic elastic modulus of cement paste. Moreover, the effect of water-cement ratio and conventional admixtures on the dynamic elastic modulus of cement paste was investigated, in which three kinds of admixtures were taken into account including viscosity modifying admixture (VMA), silica fume (SF), and shrinkage-reducing admixture (SRA). The experimental results indicate that the dynamic elastic modulus of cement paste increases with decreasing water-cement ratio. The addition of SF increases the dynamic elastic modulus, however, the overdosage of VMA causes its reduction. SRA reduces the dynamic elastic modulus at early age without affecting it in later period. Finally, a multiscale micromechanics approach coupled with a hydration model CEMHYD3D and percolation theory is utilized to predict the elastic modulus of cement paste, and the predictive results by the model are in accordance with the experimental data.

Keywords

dynamic elastic modulus / nondestructive test / viscosity modifying admixture / silica fume / shrinkage-reducing admixture / multiscale model

References

[1] Sanahuja J, Dormieux L, Chanvillard G Modelling Elasticity of a Hydrating Cement Paste[J]. Cem. Concr. Res., 2007, 37(10): 1 427-139.

[2] Chen X, Wu S Influence of Water-to-cement Ratio and Curing Period on Pore Structure of Cement Mortar[J]. Constr. Build. Mater., 2013, 38: 804-812.

[3] Chen X, Wu S, Zhou J Influence of Porosity on Compressive and Tensile Strength of Cement Mortar[J]. Constr. Build. Mater., 2013, 40: 804-812.

[4] Lee K-M, Kim D-S, Kim J-S Determination of Dynamic Young’s Modulus of Concrete at Early Ages by Impact Resonance Test[J]. Struct. Eng., 1997, 1(1): 11-18.

[5] Sun Z, Ye G, Shah SP Microstructure and Early-Age Properties of Portland Cement Paste-Effects of Connectivity of Solid Phases[J]. ACI Mater. J., 2005, 102(2): 122-129.

[6] Azenha M, Faria R, Magalhaes F, . Measurement of the E-modulus of Cement Pastes and Mortars Since Casting Using a Vibration Based Technique[J]. Materials and Structures, 2012, 45(1–2): 81-92.

[7] Maia L, Azenha M, Faria R, . Influence of the Cementitious Paste Composition on the E-modulus and Heat of Hydration Evolutions[J]. Cem. Concr. Res., 2011, 41(8): 799-807.

[8] Saric-Coric M, Khayat KH, Tagnit-Hamou A Performance Characteristics of Cement Grouts Made with Various Combinations of High-Range Water Reducer and Cellulose-Based Viscosity Modifier[J]. Cem. Concr. Res., 2003, 33(12): 1 999-2 008.

[9] Mazloom M, Ramezanianpour AA, Brooks JJ Effect of Silica Fume on Mechanical Properties of High-Strength Concrete[J]. Cem. Concr. Res., 2004, 26(4): 347-57.

[10] Passuello A, Moriconi G, Shah SP Cracking Behavior of Concrete with Shrinkage Reducing Admixtures and PVA Fbers[J]. Cem. Concr. Compos., 2009, 31(10): 699-704.

[11] ASTM Standard Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency[S], 1999

[12] Subramaniam KV, Popovics JS, Shah SP Determining Elastic Properties of Concrete Using Vibrational Resonance Frequencies of Standard Test Cylinders[J]. Cement. Concrete. Aggr., 2000, 22(2): 81-89.

[13] Wang X, Subramaniam KV Ultrasonic Monitoring of the Capillary Porosity and Elastic Properties in Hydrating Cement Paste[J]. Cem. Concr. Res., 2011, 33(3): 389-401.

[14] Bentz DP Influence of Water-to-Cement Ratio on Hydration Kinetics: Simple Models Based on Spatial Considerations[J]. Cem. Concr. Res., 2006, 36: 238-244.

[15] Lachemi M, Hossain KMA, Lambros V, Nkinamubanzi P-C, Bouzoubaa N Performance of New Viscosity Modifying Admixtures in Enhancing the Rheological Properties of Cement Paste[J]. Cem. Concr. Res., 2004, 34(2): 185-193.

[16] Mohammed Sonebi. Rheological Properties of Grouts with Viscosity Modifying Agents as Diutan Gum and Welan Gum Incorporating Pulverized Fly Ash[J]. Cem. Concr. Res., 2006, 36(9): 1 609-1 618.

[17] Sonebi M, Lachemi M, Hossain KMA Optimization of Rheological Parameters and Mechanical Properties of Superplasticised Cement Grouts Containing Metakaolin and Viscosity Modifying Admixture[J]. Constr. Build. Mater., 2013, 38: 126-138.

[18] Rajabipour F, Sant G, Weiss J Interactions between Shrinkage Reducing Admixtures(SRA) and Cement Paste’s Pore Solution[J]. Cem. Concr. Res., 2008, 38(5): 606-615.

[19] Weiss J, Lura P, Rajabipour F, Sant G Performance of Shrinkage-Reducing Admixtures at Different Humidities and at Early Ages[J]. ACI Mater. J., 2008, 105(5): 478-486.

[20] Bentz DP Influence of Shrinkage-Reducing Admixtures on Early-Age Properties of Cement Pastes[J]. J. Advan. Concr. Tech., 2006, 4(3): 423-429.

[21] Bernard O, Ulm F-J, Lemarchand E A multiscale Micromechanics-Hydration Model for the Early-Age Elastic Properties of Cement-Based Materials[J]. Cem. Concr. Res., 2003, 33(9): 1 293-1 309.

[22] Smilauer V, Bittnar Z Microstructure-Based Micromechanical Prediction of Elastic Properties in Hydrating Cement Paste[J]. Cem. Concr. Res., 2006, 36(9): 1 708-1 718.

[23] ZHAO H, WU S, HUANG D, . A multi-scale Percolation-based Approach for the Prediction of Elasticity of Earlyage Cement Paste[J]. European Journal of Environmental and Civil Engineering, 2013, 17(S1): S304-320.

[24] Bentz DP CEMHYD3D: A Three-Dimensional Cement Hydration and Microstructure Development Modeling Package[M], 2005

[25] Ulm F-J, Constantinides G Is Concrete a Poromechanics Materials? A Multiscale Investigation of Poroelastic Properties[J]. Materials and Structures, 2004, 37(1): 43-58.