Engineering >> 2022, Volume 17, Issue 10 doi: 10.1016/j.eng.2020.08.025
Nanomechanical Characteristics of Interfacial Transition Zone in Nano-Engineered Concrete
a School of Civil Engineering, Dalian University of Technology, Dalian 116024, China
b School of Material Science and Engineering, Dalian University of Technology, Dalian 116024, China
c Department of Materials and Environment (Microlab), Faculty of Civil Engineering and Geoscience, Delft University of Technology, Delft 2628 CN, Netherlands
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Abstract
This study investigates the effects of nanofillers on the interfacial transition zone (ITZ) between aggregate and cement paste by using nanoindentation and statistical nanoindentation techniques. Moreover, the underlying mechanisms are revealed through micromechanical modeling. The nanoindentation results indicate that incorporating nanofillers increases the degree of hydration in the ITZ, reduces the content of micropores and low-density calcium silicate hydrate (LD C-S-H), and increases the content of high-density C-S-H (HD C-S-H) and ultrahigh-density C-S-H (UHD C-S-H). In particular, a new phase, namely nano-core-induced low-density C-S-H (NCILD C-S-H), with a superior hardness of 2.50 GPa and an indentation modulus similar to those of HD C-S-H or UHD C-S-H was identified in this study. The modeling results revealed that the presence of nanofillers increased the packing density of LD C-S-H and significantly enhanced the interaction (adhesion and friction) among the basic building blocks of C-S-H gels owing to the formation of nano-core-shell elements, thereby facilitating the formation of NCILD C-S-H and further improving the performance of the ITZ. This study provides insight into the effects of nanofillers on the ITZ in concrete at the nanoscale.
Keywords
Concrete ; Nanofiller ; Interfacial transition zone ; Nanoindentation ; Micromechanical modeling ; Nano-core effect
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References
[ 1 ] Scrivener KL, Crumbie AK, Laugesen P. The interfacial transition zone (ITZ) between cement paste and aggregate in concrete. Interface Sci 2004;12 (4):411–21.
[ 2 ] Hu J, Stroeven P. Properties of the interfacial transition zone in model concrete. Interface Sci 2004;12(4):389–97.
[ 3 ] Maso JC, editor. Interfacial transition zone in concrete. London: CRC Press; 2014.
[ 4 ] Chen H, Sun W, Stroeven P. Interfacial transition zone between aggregate and paste in cementitious composites (II): mechanism of formation and degradation of interfacial transition zone microstructure and its influence factors. J Chin Ceram Soc 2004;32(1):70–9.
[ 5 ] Xiao J, Li W, Corr DJ, Shah SP. Effects of interfacial transition zones on the stress–strain behavior of modeled recycled aggregate concrete. Cem Concr Res 2013;52:82–99.
[ 6 ] Setiawan Y, Gan BS, Han AL. Modeling of the ITZ zone in concrete: experiment and numerical simulation. Comput Concr 2017;19(6):641–9.
[ 7 ] Hong Li, Gu X, Lin F. Influence of aggregate surface roughness on mechanical properties of interface and concrete. Constr Build Mater 2014;65:338–49.
[ 8 ] Zhang L, Zhang Y, Liu C, Liu L, Tang K. Study on microstructure and bond strength of interfacial transition zone between cement paste and highperformance lightweight aggregates prepared from ferrochromium slag. Constr Build Mater 2017;142:31–41.
[ 9 ] Hussin A, Poole C. Petrography evidence of the interfacial transition zone (ITZ) in the normal strength concrete containing granitic and limestone aggregates. Constr Build Mater 2011;25(5):2298–303.
[10] Gao Y, Hu C, Zhang Y, Li Z, Pan J. Investigation on microstructure and microstructural elastic properties of mortar incorporating fly ash. Cem Concr Compos 2018;86:315–21.
[11] Wu K, Shi HS, Xu LL. Effect of mineral admixture on mechanical properties of concrete by adjusting interfacial transition zone microstructure. J Chin Ceram Soc 2017;5:623–30.
[12] Rossignolo JA, Rodrigues MS, Frias M, Santos SF, Junior HS. Improved interfacial transition zone between aggregate-cementitious matrix by addition sugarcane industrial ash. Cem Concr Compos 2017;80:157–67.
[13] Zhang M-H, Islam J, Peethamparan S. Use of nano-silica to increase early strength and reduce setting time of concretes with high volumes of slag. Cem Concr Compos 2012;34(5):650–62.
[14] Zhang M-H, Islam J. Use of nano-silica to reduce setting time and increase early strength of concretes with high volumes of fly ash or slag. Constr Build Mater 2012;29:573–80.
[15] Wang X, Zheng Q, Dong S, Ashour A, Han B. Interfacial characteristics of nanoengineered concrete composites. Constr Build Mater 2020;259:119803.
[16] Khaloo A, Mobini MH, Hosseini P. Influence of different types of nano-SiO2 particles on properties of high-performance concrete. Constr Build Mater 2016;113:188–201.
[17] Noorvand H, Abang Ali AA, Demirboga R, Farzadnia N, Noorvand H. Incorporation of nano TiO2 in black rice husk ash mortars. Constr Build Mater 2013;47:1350–61.
[18] Wang X, Dong S, Ashour A, Zhang W, Han B. Effect and mechanisms of nanomaterials on interface between aggregates and cement mortars. Constr Build Mater 2020;240:117942.
[19] Du H, Pang SD. Enhancement of barrier properties of cement mortar with graphene nanoplatelet. Cem Concr Res 2015;76:10–9.
[20] Gupta S, Gonzalez JG, Loh KJ. Self-sensing concrete enabled by nanoengineered cement-aggregate interfaces. Struct Health Monit 2017;16 (3):309–23.
[21] García-Macías E, D’Alessandro A, Castro-Triguero R, Pérez-Mira D, Ubertini F. Micromechanics modeling of the uniaxial strain-sensing property of carbon nanotube cement-matrix composites for SHM applications. Compos Struct 2017;163:195–215.
[22] Ubertini F, Laflamme S, Ceylan H, Luigi Materazzi A, Cerni G, Saleem H, et al. Novel nanocomposite technologies for dynamic monitoring of structures: a comparison between cement-based embeddable and soft elastomeric surface sensors. Smart Mater Struct 2014;23(4):984–6.
[23] Han B, Zhang L, Zeng S, Dong S, Yu X, Yang R, et al. Nano-core effect in nanoengineered cementitious composites. Composites Pt A 2017;95:100–9.
[24] Han B, Ding S, Wang J, Ou J. Nano-engineered cementitious composites: principles and practices. Berlin: Springer; 2018.
[25] Wang XH, Jacobsen S, He JY, Zhang ZL, Lee SF, Lein HL. Application of nanoindentation testing to study of the interfacial transition zone in steel fiber reinforced mortar. Cem Concr Res 2009;39(8):701–15.
[26] Sorelli L, Constantinides G, Ulm FJ, Toutlemonde F. The nano-mechanical signature of ultra high performance concrete by statistical nanoindentation techniques. Cem Concr Res 2008;38(12):1447–56.
[27] Lee H, Vimonsatit V, Chindaprasirt P. Mechanical and micromechanical properties of alkali activated fly-ash cement based on nano-indentation. Constr Build Mater 2016;107:95–102.
[28] Xu J, Corr DJ, Shah SP. Nanomechanical investigation of the effects of nanoSiO2 on C–S–H gel/cement grain interfaces. Cem Concr Compos 2015;61:7–17.
[29] Luo Z, Li W, Gan Y, Mendu K, Shah SP. Maximum likelihood estimation for nanoindentation on sodium aluminosilicate hydrate gel of geopolymer under different silica modulus and curing conditions. Composites Pt B 2020;198:108185.
[30] Luo Z, Li W, Gan Y, Mendu K, Shah SP. Applying grid nanoindentation and maximum likelihood estimation for N-A-S-H gel in geopolymer paste: investigation and discussion. Cem Concr Res 2020;135:106112.
[31] Konsta-Gdoutos MS, Metaxa ZS, Shah SP. Multi-scale mechanical and fracture characteristics and early-age strain capacity of high performance carbon nanotube/cement nanocomposites. Cem Concr Compos 2010;32(2):110–5.
[32] Long W-J, Xiao B-X, Gu Y-C, Xing F. Micro-and macro-scale characterization of nano-SiO2 reinforced alkali activated slag composites. Mater Charact 2018;136:111–21.
[33] Muthu M, Santhanam M. Effect of reduced graphene oxide, alumina and silica nanoparticles on the deterioration characteristics of Portland cement paste exposed to acidic environment. Cem Concr Compos 2018;91:118–37.
[34] Sáez de Ibarra Y, Gaitero JJ, Erkizia E, Campillo I. Atomic force microscopy and nanoindentation of cement pastes with nanotube dispersions. Phys Status Solidi A 2006;203(6):1076–81.
[35] Long W-J, Gu Y-C, Xiao B-X, Zhang Q-M, Xing F. Micro-mechanical properties and multi-scaled pore structure of graphene oxide cement paste: synergistic application of nanoindentation, X-ray computed tomography, and SEM-EDS analysis. Constr Build Mater 2018;179:661–74.
[36] Arun S, Rama Sreekanth PS, Kanagaraj S. Mechanical characterisation of PMMA/SWNTs bone cement using nanoindenter. Mater Technol 2014;29 (Suppl 1):B4–9.
[37] Zhao S, Sun W. Nano-mechanical behavior of a green ultra-high performance concrete. Constr Build Mater 2014;63:150–60.
[38] Xu J, Wang B, Zuo J. Modification effects of nanosilica on the interfacial transition zone in concrete: a multiscale approach. Cem Concr Compos 2017;81:1–10.
[39] Constantinides G, Ulm FJ. The nanogranular nature of C–S–H. J Mech Phys Solids 2007;55(1):64–90.
[40] Xu L, Deng F, Chi Y. Nano-mechanical behavior of the interfacial transition zone between steel-polypropylene fiber and cement paste. Constr Build Mater 2017;145:619–38.
[41] Oliver WC, Pharr GM. An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments. J Mater Res 1992;7(6):1564–83.
[42] Ulm F-J, Vandamme M, Jennings HM, Vanzo J, Bentivegna M, Krakowiak KJ, et al. Does microstructure matter for statistical nanoindentation techniques? Cem Concr Compos 2010;32(1):92–9.
[43] DeJong MJ, Ulm FJ. The nanogranular behavior of C–S–H at elevated temperatures (up to 700 C). Cem Concr Res 2007;37(1):1–12.
[44] Vandamme M, Ulm F-J, Fonollosa P. Nanogranular packing of C–S–H at substochiometric conditions. Cem Concr Res 2010;40(1):14–26.
[45] Bentz DP, Stutzman PE. Evolution of porosity and calcium hydroxide in laboratory concretes containing silica fume. Cem Concr Res 1994;24 (6):1044–50.
[46] Jennings HM. A model for the microstructure of calcium silicate hydrate in cement paste. Cem Concr Res 2000;30(1):101–16.
[47] Jennings HM, Thomas JJ, Gevrenov JS, Constantinides G, Ulm FJ. A multitechnique investigation of the nanoporosity of cement paste. Cem Concr Res 2007;37(3):329–36.
[48] Jennings HM. Refinements to colloid model of C–S–H in cement: CM-II. Cem Concr Res 2008;38(3):275–89.
[49] Sanahuja J, Dormieux L, Chanvillard G. Modelling elasticity of a hydrating cement paste. Cem Concr Res 2007;37(10):1427–39.
[50] Cariou S, Ulm FJ, Dormieux L. Hardness-packing density scaling relations for cohesive-frictional porous materials. J Mech Phys Solids 2008;56(3):924–52.
[51] Chen JJ, Sorelli L, Vandamme M, Ulm FJ, Chanvillard GC. A coupled nanoindentation/SEM-EDS study on low water/cement ratio Portland cement paste: evidence for C–S–H/Ca(OH)2 nanocomposites. J Am Ceram Soc 2010;93 (5):1484–93.