Effects of Coal Metakaolin on the Mechanical Properties and Microstructure of High-belite Sulphoaluminate Cement

Abstract

The effects of coal metakaolin on the mechanical properties of high-belite sulphoaluminate cement under compressive loading were investigated. The composition and microstructure of hydration products at different hydration times were analyzed by X-ray diffraction and scanning electronic microscopy. The hydration process of blended cement was studied via electrochemical impedance spectroscopy. In particular, replacing a part of cement with CMK (10%, 20%, and 30%) was found to promote the hydration process, to refine the pore size, and to improve the compressive strength of the composite. The best compressive strength of the cement was achieved at a CMK content of 30% after 28 days hydration, being improved by 20.13 MPa, or 1.44 times relative to that of undoped specimens. Furthermore, the compressive strength is shown to correlate with the impedance parameter R_CCP, which allows the latter to be used for nondestructive assessment of the compressive strength of blended cement materials.

References

[1] NasrMS, HasanZA, AbedM K, et al.. Utilization of High Volume Fraction of Binary Combinations of Supplementary Cementitious Materials in the Production of Reactive Powder Concrete[J]. Periodica Polytechnica Civil Engineering, 2020, 65: 335-343

[2] QuéréCL, JacksonRB, JonesMW, et al.. Temporary Reduction in Daily Global CO₂ Emissions during the COVID-19 Forced Confinement[J]. Nature Climate Change, 2020, 10: 647-653

[3] ForsterPM, ForsterHI, EvansMJ, et al.. Current and Future Global Climate Impacts Resulting From COVID-19[J]. Nature Climate Change, 2020, 10: 913-919

[4] ShubbarAA, JaferH, AbdulredhaM, et al.. Properties of Cement Mortar Incorporated High Volume Fraction of GGBFS and CKD from 1 day to 550 Days[J]. Journal of Building Engineering, 2020, 30: 101 327

[5] NasrMS, ShubbarAA, AbedZAR, et al.. Properties of Eco-friendly Cement Mortar Contained Recycled Materials from Different Sources[J]. Journal of Building Engineering, 2020, 31: 101 444

[6] LiuC, LuoJL, LiQY, et al.. Calcination of Green High-belite Sulphoaluminate Cement (GHSC) and Performance Optimizations of GHSC-based Foamed Concrete[J]. Materials & Design, 2019, 182: 107 986

[7] ZhangWQ, ZhuXX, XuSX, et al.. Experimental Study on Properties of a New Type of Grouting Material for the Reinforcement of Fractured Seam Floor[J]. Journal of Materials Research and Technology, 2019, 8: 5 271-5 282

[8] GartnerE, SuiTB. Alternative Cement Clinkers[J]. Cement and Concrete Research, 2018, 114: 27-39

[9] LiJStudy on High Belite-sulphoaluminate Cement[D], 2013, Wuhan, Wuhan University of Technology(In chinese)

[10] IacobescuRI, PontikesY, KoumpouriD, et al.. Synthesis, Characterization and Properties of Calcium Ferroaluminate Belite Cements Produced with Electric Arc Furnace Steel Slag as Raw Material[J]. Cement and Concrete Composites, 2013, 44: 1-8

[11] Raupp-PereiraF, BallRJ, RochaJ, et al.. New Waste Based Clinkers: Belite and Lime Formulations[J]. Cement and Concrete Research, 2008, 38: 511-521

[12] GongYF, FangYH. Preparation of Belite Cement from Stockpiled High-carbon Fly Ash using Granule-hydrothermal Synthesis Method[J]. Construction and Building Materials, 2016, 111: 175-181

[13] Martín-SedeñoMC, CuberosAJM, De la TorreG, et al.. Aluminum-rich Belite Sulfoaluminate Cements: Clinkering and Early Age Hydration[J]. Cement and Concrete Research, 2010, 40: 359-369

[14] CaiLX, LiXG, MaBG, et al.. Effect of Binding Materials on Carbide Slag Based High Utilization Solid-wastes Autoclaved Aerated Concrete (HUS-AAC): Slurry, Physic-mechanical Property and Hydration Products[J]. Construction and Building Materials, 2018, 188: 221-236

[15] SiddiqueR, KlausJ. Influence of Metakaolin on the Properties of Mortar and Concrete: A Review[J]. Applied Clay Science, 2009, 43: 392-400

[16] WangLH, LiXY, ChengY, et al.. Effects of Coal-bearing Metakaolin on the Compressive Strength and Permeability of Cemented Silty Soil and Mechanisms[J]. Construction and Building Materials, 2018, 186: 174-181

[17] WangLH, LiXY, ChengY, et al.. Effects of Coal-metakaolin on the Properties of Cemented Sandy Soil and Its Mechanisms[J]. Construction and Building Materials, 2018, 166: 592-600

[18] ZhangAY. Effect of Epoxy Resin on Mechanical Properties of Metakaolin Based Geopolymer and Microscopic Analysis[J]. Journal of Wuhan University of Technology-Mater. Sci. Ed., 2020, 35: 431-434

[19] WuZL, DengYF, LiuSY, et al.. Strength and Micro-structure Evolution of Compacted Soils Modified by Admixtures of Cement and Metakaolin[J]. Applied Clay Science, 2016, 127–128: 44-51

[20] ZhangTW, YueXB, DengYF, et al.. Mechanical Behaviour and Micro-structure of Cement-stabilised Marine Clay with a Metakaolin Agent[J]. Construction and Building Materials, 2014, 73: 51-57

[21] DongBQ, LiG, ZhangJC, et al.. Non-destructive Tracing on Hydration Feature of Slag Blended Cement with Electrochemical Method[J]. Construction and Building Materials, 2017, 149: 467-473

[22] SongGL. Equivalent Circuit Model for AC Electrochemical Impedance Spectroscopy of Concrete[J]. Cement and Concrete Research, 2000, 30: 1 723-1 730

[23] PuXC. Study on the Pozzolanic Effect of Active Mineral Admixtures in Cement and Concrete by Using Specific Strength Index[J]. China Concrete and Cement Products, 1997, 3: 6-14(In chinese)

[24] WildS, KhatibJM, JonesA. Relative Strength, Pozzolanic Activity and Cement Hydration in Superplasticised Metakaolin Concrete[J]. Cement and Concrete Research, 1996, 26: 1 537-1 544

[25] GoergensJ, ManningerT, Goetz-NeunhoefferF. In-situ XRD Study of the Temperature-dependent Early Hydration of Calcium Aluminate Cement in a Mix with Calcite[J]. Cement and Concrete Research, 2020, 136: 106160

[26] WinnefeldF, MartinLHJ, MüllerCJ, et al.. Using Gypsum to Control Hydration Kinetics of CSA Cements[J]. Construction and Building Materials, 2017, 155: 154-163

[27] MorinV, TermkhajornkitP, HuetB, et al.. Impact of Quantity of Anhydrite, Water to Binder Ratio, Fineness on Kinetics and Phase Assemblage of Belite-ye’elimite-ferrite Cement[J]. Cement and Concrete Research, 2017, 99: 8-17

[28] GastaldiD, PaulG, MarcheseL, et al.. Hydration Products in Sulfoalu-Minate Cements: Evaluation of Amorphous Phases by XRD/Solid-state NMR[J]. Cement and Concrete Research, 2016, 90: 162-173

[29] MatscheiT, LothenbachB, GlasserFP. The AFm Phase in Portland Cement[J]. Cement and Concrete Research, 2007, 37: 118-130

[30] MuratM. Hydration Reaction and Hardening of Calcined Clays and Related Minerals. I. Preliminary Investigation on Metakaolinite[J]. Cement and Concrete Research, 1983, 13: 259-266

[31] Niu SW, Sun FN, Xie RZ, et al. Study on the Hydration Processes of High Belite Sulphoaluminate Cement using Electrochemical Impedance Spectroscopy[J]. International Journal of Electrochemical Science, 2020: 12 264–12 280

[32] HuX, ShiCJ, LiuXJ, et al.. A Review on Microstructural Characterization of Cement-based Materials by AC Impedance Spectroscopy[J]. Cement and Concrete Composites, 2019, 100: 1-14

[33] Niu SW, Han PJ, Sun FN, et al. Study of the Cement Hydration Processes in Coal Metakaolin and Cement Blends by Electrochemical Impedance Spectroscopy[J]. International Journal of Electrochemical Science, 2020: 9428–9445

[34] MadejD, KrukA. Tracing the Early and Long-term Hydration of Fast Setting Cementitious Material (Ca7ZrAl6O18) and Calcium Alumínate Cement (CAC) Pastes by Means of Electrochemical Impedance Spectroscopy and Other Methods[J]. Construction and Building Materials, 2018, 164: 94-102

[35] FordSJ, HwangJH, ShaneJD, et al.. Dielectric Amplification in Cement Pastes[J]. Advanced Cement Based Materials, 1997, 5: 41-48

[36] GuP, XieP, FuY, et al.. AC Impedance Phenomena in Hydrating Cement Systems: Frequency Dispersion Angle and Pore Size Distribution[J]. Cement and Concrete Research, 1994, 24: 86-88

[37] XieP, GuP, XuZZ, et al.. A Rationalized AC Impedence Model for Microstructural Characterization of Hydrating Cement Systems[J]. Cement and Concrete Research, 1993, 23: 359-367

[38] GuP, XieP, BeaudoinJJ, et al.. AC Impedance Spectroscopy (I): A New Equivalent Circuit Model for Hydrated Portland Cement Paste[J]. Cement and Concrete Research, 1992, 22: 833-840

[39] HusainA, Kupwade-PatilK, Al-AibaniAF, et al.. In situ Electrochemical Impedance Characterization of Cement Paste with Volcanic Ash to Examine Early Stage of Hydration[J]. Construction and Building Materials, 2017, 133: 107-117

[40] ZhangYJ, WangS, LiLP, et al.. A Preliminary Study of the Properties of Potassium Phosphate Magnesium Cement-based Grouts Admixed with Metakaolin, Sodium Silicate and Bentonite[J]. Construction and Building Materials, 2020, 262: 119893

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