This paper examines a rapid repair material for cement concrete pavement based on magnesium phosphate cement (MPC) blended with fly ash (FA). Three kinds of stress forms for rapid repair of Portland cement concrete pavement (PCCP) were evaluated and the role of FA in the repair interface was studied. The optimal mixture ratio of FA-MPC mortar was determined, and the compressive and flexural strength tested. The composite specimens were then designed to test the interfacial bonding, tensile, and plain shear strength. Finally, the multi-scale mechanism of FA in the interface was analyzed by a pull-off adhesion test, nanoindentation test, scanning electron microscope (SEM)/energy dispersive spectrometer (EDS), Raman spectrum, and molecular dynamics simulation. The optimal content of FA in MPC mortar was 20%. The laminated beam structure had the maximum strength, and the interface load bearing capacity was the lowest. For further multi-scale analysis, the results of the pull-off adhesion test showed the adhesion strength of interface was increased by the curing age and loading rate. Adhesion capacity of basalt aggregate and FA-MPC was stronger than that of Portland cement mortar and FA-MPC. The elastic modulus of MPC-aggregate interface was more than that of MPC-OPC mortar. SEM/EDS and Raman spectrum results showed that the MPC blended with FA had cracks and defects at the interface formed with cement mortar. Less FA formed near the interface. The good adhesion ability of FA and basalt aggregate was verified by molecular dynamics simulation. By contrast, poor adhesion strength with cement mortar was confirmed.
CoxB. C.FloydW. C.RushingJ. F.RutlandC. A.Rapid Inductive Heating of Asphalt Concrete to Hot Mix Temperatures for All-Season Pothole Patching: Feasibility Study. Transportation Research Record: Journal of the Transportation Research Board, 2019. 2673(6): 477–491. https://doi.org/10.1177/0361198119848707
2.
ShiJ.LiuB.TanJ.DaiJ.ChenJ.JiR.Experimental Studies and Microstructure Analysis for Rapid-Hardening Cement Emulsified Asphalt Mortar. Journal of Construction Engineering and Management, Vol. 146, No. 12, 2020, p. 04020130. https://doi.org/10.1061/(asce)co.1943-7862.0001933
3.
GholamiS.HuJ.KimY. R.MamirovM.Performance of Portland Cement-Based Rapid-Patching Materials with Different Cement and Accelerator Types, and Cement Contents. Transportation Research Record: Journal of the Transportation Research Board, Vol. 2673, No. 11, 2019, 172–184. https://doi.org/10.1177/0361198119852330
4.
LiuY.JiaM.SongC.LuS.WangH.ZhangG.YangY.Enhancing Ultra-Early Strength of Sulphoaluminate Cement-Based Materials by Incorporating Graphene Oxide. Nanotechnology Reviews, Vol. 9, No. 1, 2020, pp. 17–27. https://doi.org/10.1515/ntrev-2020-0002
5.
ZengX.YuH.Research on Technology of Performance Improvement of Basic Magnesium Sulfate Cement—BMS. Structural Concrete, Vol. 24, No. 3, 2020, pp. 4313–4321. https://doi.org/10.1002/suco.202000165
6.
XunX.ZongyueH.LilingD.YudongZ.YulongX.WeichaoL.Investigation of High Volume of CFBC Ash on Performance of Basic Magnesium Sulfate Cement. Journal of Environmental Management, Vol. 256, 2020, p. 109878. https://doi.org/10.1016/j.jenvman.2019.109878
7.
XuX.XuY.DuanL.Effect of Fineness and Components of CFBC Ash on Performance of Basic Magnesium Sulfate Cement. Construction and Building Materials, Vol. 170, 2018, pp. 801–811. https://doi.org/10.1016/j.conbuildmat.2018.03.054
8.
XuB.WinnefeldF.LothenbachB.Effect of Temperature Curing on Properties and Hydration of Wollastonite Blended Magnesium Potassium Phosphate Cements. Cement and Concrete Research, Vol. 142, 2021, p. 106370. https://doi.org/10.1016/j.cemconres.2021.106370
9.
GardnerL. J.CorkhillC. L.WallingS. A.VigorJ. E.MurrayC. A.TangC. C.ProvisJ. L.HyattN. C.Early Age Hydration and Application of Blended Magnesium Potassium Phosphate Cements for Reduced Corrosion of Reactive Metals. Cement and Concrete Research, Vol. 143, 2021, p. 106375. https://doi.org/10.1016/j.cemconres.2021.106375.
10.
YangN.ShiC.YangJ.ChangY.Research Progresses in Magnesium Phosphate Cement–Based Materials. Journal of Materials in Civil Engineering, Vol. 26, No. 10, 2014, pp. 1–8. https://doi.org/10.1061/(ASCE)MT.1943-5533.0000971
11.
YangJ.WangL.ZhangJ.Experimental Study on the Deformation Characteristics of Magnesium Potassium Phosphate Cement Paste at Early Hydration Ages. Cement and Concrete Composites, Vol. 103, 2019, pp. 175–182. https://doi.org/10.1016/j.cemconcomp.2019.05.003
12.
SinclairG. BBartonF. G.KennedyL. J.Military Engineering in the Falkland Islands 1982-83. Proceedings of the Institution of Civil Engineers, Vol. 76, No. 1, 1985, pp. 269–277.
13.
SeehraS. S.GuptaS.KumarS.Rapid Setting Magnesium Phosphate Cement for Quick Repair of Concrete Pavements–Characterisation and Durability Aspects. Cement and Concrete Research, Vol. 23, No. 2, 1993, pp. 254–266. https://doi.org/10.1016/0008-8846(93)90090-V
14.
ZhangQ.CaoX.MaR.SunS.FangL.LinJ.LuoJ.Solid Waste-Based Magnesium Phosphate Cements: Preparation, Performance and Solidification/Stabilization Mechanism. Construction and Building Materials, Vol. 297, 2021, p. 123761. https://doi.org/10.1016/j.conbuildmat.2021.123761
15.
GaoM.ChenB.LangL.MuhammadR. A.Influence of Silica Fume on Mechanical Properties and Water Resistance of Magnesium–Ammonium Phosphate Cement. Journal of Materials in Civil Engineering, Vol. 32, No. 3, 2020, p. 04019368. https://doi.org/10.1061/(asce)mt.1943-5533.0003035
16.
Le RouzicM.ChaussadentT.PlatretG.StefanL.Mechanisms of K-Struvite Formation in Magnesium Phosphate Cements. Cement and Concrete Research, Vol. 91, 2017, pp. 117–122. https://doi.org/10.1016/j.cemconres.2016.11.008
17.
FengH.LiZ.WangW.LiuG.ZhangZ.GaoD.Deflection Hardening Behaviour of Ductile Fibre Reinforced Magnesium Phosphate Cement-Based Composite. Cement and Concrete Composites, Vol. 121, 2021, p. 104079. https://doi.org/10.1016/j.cemconcomp.2021.104079
18.
XuB.LothenbachB.LiZ.Properties and Hydrates of Seawater-Mixed Magnesium Potassium Phosphate Cements with High Magnesium-to-Phosphate Ratio. Cement and Concrete Composites, Vol. 134, 2022, p. 104807. https://doi.org/10.1016/j.cemconcomp.2022.104807
19.
LiuF.PanB.ZhouC.Experimental Study on a Novel Modified Magnesium Phosphate Cement Mortar Used for Rapid Repair of Portland Cement Concrete Pavement in Seasonally Frozen Areas. Journal of Materials in Civil Engineering, Vol. 34, No. 3, 2022, p. 04021483. https://doi.org/10.1061/(asce)mt.1943-5533.0004121
20.
AroraA.SinghB.KaurP.Novel Material i.e., Magnesium Phosphate Cement (MPC) as Repairing Material in Roads and Buildings. Materials Today: Proceedings, Vol. 17, 2019, pp. 70–76. https://doi.org/10.1016/j.matpr.2019.06.402
21.
TonelliM.GelliR.RidiF.BaglioniP.Magnesium Phosphate-Based Cements Containing Halloysite Nanotubes for Cracks Repair. Construction and Building Materials, Vol. 301, 2021, p. 124056. https://doi.org/10.1016/j.conbuildmat.2021.124056
QiaoF.ChauC. K.LiZ.Property Evaluation of Magnesium Phosphate Cement Mortar as Patch Repair Material. Construction and Building Materials, Vol. 24, No. 5, 2010, pp. 695–700. https://doi.org/10.1016/J.CONBUILDMAT.2009.10.039
24.
DongQ.PhD.GaoJ.ChenX.PhD.WangX.Development of a Turpentine Cutback Asphalt Mixture for Porous Pavement Pothole Repair. Journal of Materials in Civil Engineering, Vol. 32, No. 3, 2020, pp. 2–6. https://doi.org/10.1061/(ASCE)MT.1943-5533.0003075
25.
Zhen-L. I.WangB.Performance of Polymer Modified Basic Magnesium Sulfate Cement for Pavement Crack Repair. Bulletin of the Chinese Ceramic Society, Vol. 36, 2017, pp. 3268–3672. https://doi.org/10.16552/j.cnki.issn1001-1625.2017.10.009
26.
JiaL.ZhaoF.YaoK.DuH.Bond Performance of Repair Mortar Made with Magnesium Phosphate Cement and Ferroaluminate Cement. Construction and Building Materials, Vol. 279, 2021, p. 122398. https://doi.org/10.1016/j.conbuildmat.2021.122398
27.
LiuS.YuL.HanH.PanF.WuK.YangZ.Effect of Vehicle–Bridge Coupled Vibration on the Performance of Magnesium Phosphate Cement Repair Materials. Materials, Vol. 14, No. 24, 2021, p. 7743. https://doi.org/10.3390/ma14247743
28.
QinJ.QianJ.YouC.FanY.LiZ.WangH.Bond Behavior and Interfacial Micro-Characteristics of Magnesium Phosphate Cement onto Old Concrete Substrate. Construction and Building Materials, Vol. 167, 2018, pp. 166–176. https://doi.org/10.1016/j.conbuildmat.2018.02.018
29.
WangL.ChenL.GuoB.TsangD. C. W.HuangL.SikY.Red Mud-Enhanced Magnesium Phosphate Cement for Remediation of Pb and As Contaminated Soil. Journal of Hazardous Materials, Vol. 400, 2020, p. 123317.
30.
PandeyA.SchwabP.LittleD. N.Optimization of Magnesium Phosphate Cement: Stabilization of a Kaolinitic Soil. Transportation Geotechnics, Vol. 37, 2022, p. 100854. https://doi.org/10.1016/j.trgeo.2022.100854
31.
YuJ.QianJ.WangF.LiZ.JiaX.Preparation and Properties of a Magnesium Phosphate Cement with Dolomite. Cement and Concrete Research, Vol. 138, 2020, p. 106235. https://doi.org/10.1016/j.cemconres.2020.106235
32.
XuB.LothenbachB.MaH.Properties of Fly Ash Blended Magnesium Potassium Phosphate Mortars: Effect of the Ratio between Fly Ash and Magnesia. Cement and Concrete Composites, Vol. 90, 2018, pp. 169–177. https://doi.org/10.1016/j.cemconcomp.2018.04.002
33.
JTG E30-2005. Test Methods of Cement and Concrete for Highway Engineering. Ministry of Transport Highway Scientific Research Institute, China Communication Press, Beijing, 2005.
34.
LiuX.ZhouC.FengD.FanX.XieS.Experimental Study on Interlayer Shear Properties of ERS Pavement System for Long-Span Steel Bridges. Construction and Building Materials, Vol. 143, 2017, pp. 198–209. https://doi.org/10.1016/j.conbuildmat.2017.03.144
35.
ASTM International. ASTM E2546-15(2023) Standard Practice for Instrumented Indentation Testing. ASTM, West Conshohocken, Vol. 3, No. 1, 2023, pp. 1–24. http://doi.org/10.1520/E2546-15R23.
36.
OliverW. C.PharrG. M.An Improved Technique for Determining Hardness and Elastic Modulus Using Load and Displacement Sensing Indentation Experiments. Journal of Material Research, Vol. 7, 1992, pp. 1564–1583. https://doi.org/10.1557/JMR.1992.1564
37.
HayJ. C.BolshakovA.PharrG. M.A Critical Examination of the Fundamental Relations Used in the Analysis of Nanoindentation Data. Journal of Materials Research, Vol. 14, 1999, pp. 2296–2305. https://doi.org/10.1016/j.matlet.2008.01.105
38.
YuJ.HouD.ZhangJ. R.Molecular Dynamics Study on Ultra-Confined NaCl Solution in the Silane Coupling Agent Modified Rubber Calcium Silicate Hydrate Nano-Pore. Construction and Building Materials, Vol. 270, 2021, p. 121418. https://doi.org/10.1016/j.conbuildmat.2020.121418
39.
HouD.YanH.ZhangJ.WangP.LiZ.Experimental and Computational Investigation of Magnesium Phosphate Cement Mortar. Construction and Building Materials, Vol. 112, 2016, pp. 331–342. https://doi.org/10.1016/j.conbuildmat.2016.02.200
40.
LiW.HuangZ.CaoF.SunZ.ShahS. P.Effects of Nano-Silica and Nano-Limestone on Flowability and Mechanical Properties of Ultra-High-Performance Concrete Matrix. Construction and Building Materials, Vol. 95, 2015, pp. 366–374. https://doi.org/10.1016/j.conbuildmat.2015.05.137
41.
LiJ.ZhangW.CaoY.Laboratory Evaluation of Magnesium Phosphate Cement Paste and Mortar for Rapid Repair of Cement Concrete Pavement. Construction and Building Materials, Vol. 58, 2014, pp. 122–128. https://doi.org/10.1016/j.conbuildmat.2014.02.015
42.
DuanH.ChenB.LangL.Novel Plastering Mortar Incorporating Cenospheres for Autoclaved Aerated Concrete Based on Magnesium Phosphate Cement. Journal of Materials in Civil Engineering, Vol. 33, 2021, p. 04021020. https://doi.org/10.1061/(ASCE)MT.1943-5533.0003646
43.
YangQ.ZhangS.WuX.Deicer-Scaling Resistance of Phosphate Cement-Based Binder for Rapid Repair of Concrete. Cement and Concrete Research, Vol. 32, No. 1, 2002, pp. 165–168. https://doi.org/10.1016/S0008-8846(01)00651-2
44.
XuB.WinnefeldF.KaufmannJ.LothenbachB.Influence of Magnesium-to-Phosphate Ratio and Water-to-Cement Ratio on Hydration and Properties of Magnesium Potassium Phosphate Cements. Cement and Concrete Research, Vol. 123, 2019, p. 105781. https://doi.org/10.1016/j.cemconres.2019.105781
45.
LiuX.LiY.Plain Concrete Prisms Externally Strengthened by CFRP Bonded with Graphene Oxide–Modified Magnesium Phosphate Cement. Journal of Materials in Civil Engineering, Vol. 32, No. 5, 2020, p. 04020069. https://doi.org/10.1061/(asce)mt.1943-5533.0003134
46.
WangA.YuanZ.ZhangJ.LiuL.LiJ.LiuZ.Effect of Raw Material Ratios on the Compressive Strength of Magnesium Potassium Phosphate Chemically Bonded Ceramics. Materials Science and Engineering: C, Vol. 33, No. 8, 2013, pp. 5058–5063. https://doi.org/10.1016/J.MSEC.2013.08.031
47.
LiY.BaiW.ShiT.A Study of the Bonding Performance of Magnesium Phosphate Cement on Mortar and Concrete. Construction and Building Materials, Vol. 142, 2017, pp. 459–468. https://doi.org/10.1016/j.conbuildmat.2017.03.090
48.
FengH.ZhaoX.LiL.ZhaoX.GaoD.Water Stability of Bonding Properties between Nano-Fe2O3-Modified Magnesium-Phosphate-Cement Mortar and Steel Fibre. Construction and Building Materials, Vol. 291, 2021, p. 123316. https://doi.org/10.1016/j.conbuildmat.2021.123316
49.
StefovV.CahilA.ŠoptrajanovB.NajdoskiM.SpirovskiF.EngelenB.LutzH. D.KolevaV.Infrared and Raman Spectra of Magnesium Ammonium Phosphate Hexahydrate (Struvite) and Its Isomorphous Analogues. VII: Spectra of Protiated and Partially Deuterated Hexagonal Magnesium Caesium Phosphate Hexahydrate. Journal of Molecular Structure, Vol. 924–926, No. C, 2009, pp. 100–106. https://doi.org/10.1016/j.molstruc.2008.12.009
50.
LiuF.PanB.ZhouC.Multilayer Microstructure Characterization of the Interfacial Transition Zone between Polymer-Modified Magnesium Phosphate Cement and Portland Cement. Journal of Materials in Civil Engineering, Vol. 34, No. 4, 2022, p. 04022004. https://doi.org/10.1061/(asce)mt.1943-5533.0004137
51.
GardnerL. J.WallingS. A.LawsonS. M.SunS.BernalS. A.CorkhillC. L.ProvisJ. L.et al. Characterization of and Structural Insight into Struvite-K, MgKPO4·6H2O, An Analogue of Struvite. Inorganic Chemistry, Vol. 60, No. 1, 2021, pp. 195–205. https://doi.org/10.1021/acs.inorgchem.0c02802
52.
NataliM. E.WhiteC. E.BignozziM. C.Elucidating the Atomic Structures of Different Sources of Fly Ash Using X-Ray and Neutron PDF Analysis. Fuel, Vol. 177, 2016, pp. 148–156. https://doi.org/10.1016/j.fuel.2016.03.017
53.
DingY.HuangB.ShuX.ZhangY.WoodsM. E.Use of Molecular Dynamics to Investigate Diffusion between Virgin and Aged Asphalt Binders. Fuel, Vol. 174, 2016, pp. 267–273. https://doi.org/10.1016/j.fuel.2016.02.022
54.
LiuF.PanB.ZhouC.WangB.Investigation of Interface Fracture between BFPMPC and Cement Concrete. Transportation Research Record: Journal of the Transportation Research Board, 2023: 0(0). https://doi.org/10.1177/03611981231203223
55.
WangX.DingS.QiuL.AshourA.WangY.HanB.OuJ.Improving Bond of Fiber-Reinforced Polymer Bars with Concrete through Incorporating Nanomaterials. Composites Part B: Engineering, Vol. 239, 2022, p. 109960. https://doi.org/10.1016/j.compositesb.2022.109960
56.
WangX.DongS.LiZ.HanB.OuJ.Nanomechanical Characteristics of Interfacial Transition Zone in Nano-Engineered Concrete. Engineering, Vol. 17, 2022, pp. 99–109. https://doi.org/10.1016/j.eng.2020.08.025
