[5] [5] HUANG Y, LIN Z S. Investigation on phosphogypsum-steel slag-granulated blast-furnace slag-limestone cement[J]. Construction and Building Materials, 2010, 24(7): 1296-1301.

[8] [8] ZHANG J X, CUI K, CHANG J, et al. Phosphogypsum-based building materials: resource utilization, development, and limitation[J]. Journal of Building Engineering, 2024, 91: 109734.

[9] [9] SUN T, XIAO X Y, OUYANG G S, et al. Utilization of waterglass coatings to improve the carbonization resistance of excess-sulphate phosphogypsum slag plastering mortar[J]. Construction and Building Materials, 2023, 408: 133644.

[10] [10] XU J, XU F, JIANG Y, et al. Mechanical properties and soluble phosphorus solidification mechanism of a novel high amount phosphogypsum-based mortar[J]. Construction and Building Materials, 2023, 394: 132176.

[11] [11] DING C, SUN T, SHUI Z H, et al. Physical properties, strength, and impurities stability of phosphogypsum-based cold-bonded aggregates[J]. Construction and Building Materials, 2022, 331: 127307.

[12] [12] OUYANG G S, CHEN J J, WANG Z Y, et al. Valorization of alkali-activated fly ash-slag claddings to enhance the mechanical and leaching properties of phosphogypsum-based cold-bonded aggregates[J]. Developments in the Built Environment, 2024, 18: 100464.

[13] [13] OUYANG G S, SUN T, WANG Z Y, et al. Consecutive pozzolanic layerings to depress internal-sulfate-attack corrosion of OPC by phosphogypsum-based cold bonded aggregates[J]. Corrosion Science, 2024, 240: 112458.

[14] [14] LIU G, HE M H, CHEN H, et al. Study on the curing conditions on the physico-mechanical and environmental performance of phosphogypsum-based artificial aggregates[J]. Construction and Building Materials, 2024, 415: 135030.

[15] [15] SUN T, XU D, OUYANG G S, et al. Mechanical properties and environmental implications of excess-sulfate cement concrete with phosphogypsum-based cold-bonded fine aggregates[J]. Journal of Building Engineering, 2024, 95: 110008.

[16] [16] OUYANG G S, SUN T, GUO Y H, et al. Study on the composite compatibility and interfacial properties of excess sulfate phosphogypsum cementing system to OPC and CSˉ A[J]. Composite Structures, 2024, 345: 118389.

[17] [17] SUN T, LI W M, XU F, et al. A new eco-friendly concrete made of high content phosphogypsum based aggregates and binder: mechanical properties and environmental benefits[J]. Journal of Cleaner Production, 2023, 400: 136555.

[19] [19] LIANG Y S, GUAN B, CAO T W, et al. Study on the properties of an excess-sulphate phosphogypsum slag cement stabilized base-course mixture containing phosphogypsum-based artificial aggregate[J]. Construction and Building Materials, 2023, 409: 134095.

[20] [20] LIU G, GUAN B, LIANG Y S, et al. Preparation of phosphogypsum (PG) based artificial aggregate and its application in the asphalt mixture[J]. Construction and Building Materials, 2022, 356: 129218.

[21] [21] QIN X T, CAO Y H, GUAN H W, et al. Resource utilization and development of phosphogypsum-based materials in civil engineering[J]. Journal of Cleaner Production, 2023, 387: 135858.

[22] [22] SUN T, HE J T, MO Z L, et al. Groutability prediction model of coral sand reinforced by excess-sulfate phosphogypsum slag grouting material under permeation grouting[J]. Construction and Building Materials, 2024, 451: 138697.

[23] [23] GU K, CHEN B, PAN Y J. Utilization of untreated-phosphogypsum as filling and binding material in preparing grouting materials[J]. Construction and Building Materials, 2020, 265: 120749.

[24] [24] WANG Z Y, SUN T, OUYANG G S, et al. Simultaneous enhanced phosphorus removal and hydration reaction: utilisation of polyaluminium chloride and polyaluminium ferric chloride to modify phosphogypsum-based excess-sulphate slag cement[J]. Journal of Cleaner Production, 2024, 476: 143712.

[25] [25] MURALI G, AZAB M. Recent research in utilization of phosphogypsum as building materials: review[J]. Journal of Materials Research and Technology, 2023, 25: 960-987.

[26] [26] COSTA A R D, MATOS S R C, CAMARINI G, et al. Hydration of sustainable ternary cements containing phosphogypsum[J]. Sustainable Materials and Technologies, 2021, 28: e00280.

[27] [27] BELLEFQIH H, BOURGIER V, BILAL E, et al. Effect of HPO2-4 and brushite on gypsum reactivity and implications for utilization of phosphogypsum in plaster production[J]. Journal of Cleaner Production, 2024, 451: 142013.

[28] [28] ENNACIRI Y, BETTACH M. Procedure to convert phosphogypsum waste into valuable products[J]. Materials and Manufacturing Processes, 2018, 33(16): 1727-1733.

[29] [29] SINGH M. Effect of phosphatic and fluoride impurities of phosphogypsum on the properties of selenite plaster[J]. Cement and Concrete Research, 2003, 33(9): 1363-1369.

[31] [31] LIU S H, FANG P P, REN J, et al. Application of lime neutralised phosphogypsum in supersulfated cement[J]. Journal of Cleaner Production, 2020, 272: 122660.

[32] [32] CHEN Q S, SUN S Y, WANG Y M, et al. In-situ remediation of phosphogypsum in a cement-free pathway: utilization of ground granulated blast furnace slag and NaOH pretreatment[J]. Chemosphere, 2023, 313: 137412.

[33] [33] WU Y, XU F, WU X T, et al. Retardation mechanism of phosphogypsum in phosphogypsum-based excess-sulfate cement[J]. Construction and Building Materials, 2024, 428: 136293.

[35] [35] HAN S, ZHAO Z M, CHENG Y H, et al. On pretreatment experimental study of Yunnan phosphorus building gypsum[J]. Advanced Materials Research, 2014, 1025/1026: 837-841.

[36] [36] WANG Z Y, SHUI Z H, SUN T, et al. Reutilization of gangue wastes in phosphogypsum-based excess-sulphate cementitious materials: effects of wet co-milling on the rheology, hydration and strength development[J]. Construction and Building Materials, 2023, 363: 129778.

[37] [37] MASHIFANA T P. Chemical treatment of phosphogypsum and its potential application for building and construction[J]. Procedia Manufacturing, 2019, 35: 641-648.

[38] [38] LIU S H, WANG L, YU B Y. Effect of modified phosphogypsum on the hydration properties of the phosphogypsum-based supersulfated cement[J]. Construction and Building Materials, 2019, 214: 9-16.

[39] [39] LI X B, ZHANG Q. Dehydration behaviour and impurity change of phosphogypsum during calcination[J]. Construction and Building Materials, 2021, 311: 125328.

[40] [40] CAO W X, YI W, LI J, et al. A facile approach for large-scale recovery of phosphogypsum: an insight from its performance[J]. Construction and Building Materials, 2021, 309: 125190.

[41] [41] LV X F, XIANG L. Investigating the novel process for thorough removal of eutectic phosphate impurities from phosphogypsum[J]. Journal of Materials Research and Technology, 2023, 24: 5980-5990.

[42] [42] MESHRI D T. The modern inorganic fluorochemical industry[J]. Journal of Fluorine Chemistry, 1986, 33(1/2/3/4): 195-226.

[43] [43] SINGH M, GARG M, REHSI S S. Purifying phosphogypsum for cement manufacture[J]. Construction and Building Materials, 1993, 7(1): 3-7.

[47] [47] PARK H, JEONG Y, JUN Y B, et al. Strength enhancement and pore-size refinement in clinker-free CaO-activated GGBFS systems through substitution with gypsum[J]. Cement and Concrete Composites, 2016, 68: 57-65.

[48] [48] PENG Z C, ZHOU Y, WANG J W, et al. The impediment and promotion effects and mechanisms of lactates on the hydration of supersulfated cements-Aiming at a performance enhancement[J]. Journal of Cleaner Production, 2022, 341: 130751.

[49] [49] GIJBELS K, PONTIKES Y, SAMYN P, et al. Effect of NaOH content on hydration, mineralogy, porosity and strength in alkali/sulfate-activated binders from ground granulated blast furnace slag and phosphogypsum[J]. Cement and Concrete Research, 2020, 132: 106054.

[50] [50] XING J R, ZHOU Y, PENG Z C, et al. The influence of different kinds of weak acid salts on the macro-performance, micro-structure, and hydration mechanism of the supersulfated cement[J]. Journal of Building Engineering, 2023, 66: 105937.

[51] [51] GIJBELS K, NGUYEN H, KINNUNEN P, et al. Feasibility of incorporating phosphogypsum in ettringite-based binder from ladle slag[J]. Journal of Cleaner Production, 2019, 237: 117793.

[53] [53] SUN T, LI Z W, WANG Z Y, et al. Optimization on hydration efficiency of an all-solid waste binder: carbide slag activated excess-sulphate phosphogypsum slag cement[J]. Journal of Building Engineering, 2024, 86: 108851.

[56] [56] OUYANG G S, LI Z W, SUN T, et al. Greener phosphogypsum-based all-solid-waste cementitious binder with steel slag activation: hydration, mechanical properties and durability[J]. Journal of Cleaner Production, 2024, 443: 140996.

[58] [58] GRACIOLI B, ANGULSKI DA LUZ C, BEUTLER C S, et al. Influence of the calcination temperature of phosphogypsum on the performance of supersulfated cements[J]. Construction and Building Materials, 2020, 262: 119961.

[59] [59] MATSCHEI T, BELLMANN F, STARK J. Hydration behaviour of sulphate-activated slag cements[J]. Advances in Cement Research, 2005, 17(4): 167-178.

[62] [62] MUN K J, HYOUNG W K, LEE C W, et al. Basic properties of non-sintering cement using phosphogypsum and waste lime as activator[J]. Construction and Building Materials, 2007, 21(6): 1342-1350.

[64] [64] MASOUDI R, HOOTON R D. Examining the hydration mechanism of supersulfated cements made with high and low-alumina slags[J]. Cement and Concrete Composites, 2019, 103: 193-203.

[65] [65] GRUSKOVNJAK A, LOTHENBACH B, HOLZER L, et al. Hydration of alkali-activated slag: comparison with ordinary Portland cement[J]. Advances in Cement Research, 2006, 18(3): 119-128.

[66] [66] WANG Y B, HU Y, HE X Y, et al. Hydration and compressive strength of supersulfated cement with low-activity high alumina ferronickel slag[J]. Cement and Concrete Composites, 2023, 136: 104892.

[67] [67] JUENGER M C G, WINNEFELD F, PROVIS J L, et al. Advances in alternative cementitious binders[J]. Cement and Concrete Research, 2011, 41(12): 1232-1243.

[68] [68] WANG Z Y, SHUI Z H, SUN T, et al. Recycling utilization of phosphogypsum in eco excess-sulphate cement: synergistic effects of metakaolin and slag additives on hydration, strength and microstructure[J]. Journal of Cleaner Production, 2022, 358: 131901.

[69] [69] WANG Z Y, SHUI Z H, SUN T, et al. An eco-friendly phosphogypsum-based cementitious material: performance optimization and enhancing mechanisms[J]. Frontiers in Physics, 2022, 10: 892037.

[70] [70] CHEN W, LUO Z P, SUN T, et al. Utilization of high-volume phosphogypsum in artificial aggregate by compaction granulation: effects of muck on physical properties, strength and leaching stability[J]. Journal of Sustainable Cement-Based Materials, 2023, 12(8): 951-961.

[72] [72] XIAO Y, SUN W J, TAN Y Z, et al. Enhancement of phosphogypsum-based solid waste cementitious materials via seawater and metakaolin synergy: strength, microstructure, and environmental benefits[J]. Sustainable Materials and Technologies, 2024, 41: e01029.

[73] [73] LIU X, TANG P, CHEN W. Development of an ettringite-based low carbon binder by promoting the nucleation and Ostwald ripening process[J]. Construction and Building Materials, 2024, 427: 136282.

[74] [74] CHEN W, LI B, LI Q, et al. Effect of polyaluminum chloride on the properties and hydration of slag-cement paste[J]. Construction and Building Materials, 2016, 124: 1019-1027.

[76] [76] SCRIVENER K L, TAYLOR H F W. Delayed ettringite formation: a microstructural and microanalytical study[J]. Advances in Cement Research, 1993, 5(20): 139-146.

[77] [77] TANG P, WEN J Q, FU Y B, et al. Improving the early-age properties of eco-binder with high volume waste gypsum: hydration process and ettringite formation[J]. Journal of Building Engineering, 2024, 86: 108988.

[79] [79] LV X D, YANG L, WANG F Z, et al. Hydration, microstructure characteristics, and mechanical properties of high-ferrite Portland cement in the presence of fly ash and phosphorus slag[J]. Cement and Concrete Composites, 2023, 136: 104862.

[80] [80] ZHANG K C, SHEN P L, YANG L, et al. Development of high-ferrite cement: toward green cement production[J]. Journal of Cleaner Production, 2021, 327: 129487.

[81] [81] EMANUELSON A, HENDERSON E, HANSEN S. Hydration of ferrite Ca2AlFeO5 in the presence of sulphates and bases[J]. Cement and Concrete Research, 1996, 26(11): 1689-1694.

[82] [82] HUANG X, HU S G, WANG F Z, et al. Enhanced sulfate resistance: the importance of iron in aluminate hydrates[J]. ACS Sustainable Chemistry & Engineering, 2019, 7(7): 6792-6801.

[83] [83] NOGUCHI N, SIVENTHIRARAJAH K, CHABAYASHI T, et al. Hydration of ferrite-rich Portland cement: evaluation of Fe-hydrates and Fe uptake in calcium-silicate-hydrates[J]. Construction and Building Materials, 2021, 288: 123142.

[84] [84] FUKUHARA M, GOTO S, ASAGA K, et al. Mechanisms and kinetics of C4AF hydration with gypsum[J]. Cement and Concrete Research, 1981, 11(3): 407-414.

[85] [85] DILNESA B Z, LOTHENBACH B, RENAUDIN G, et al. Synthesis and characterization of hydrogarnet Ca3(AlxFe1-x)2(SiO4)y(OH)4(3-y)[J]. Cement and Concrete Research, 2014, 59: 96-111.

[86] [86] DILNESA B Z, WIELAND E, LOTHENBACH B, et al. Fe-containing phases in hydrated cements[J]. Cement and Concrete Research, 2014, 58: 45-55.

[87] [87] MSCHNER G, LOTHENBACH B, WINNEFELD F, et al. Solid solution between Al-ettringite and Fe-ettringite (Ca6 ［Al1-xFex(OH)6］2(SO4)3·26H2O)[J]. Cement and Concrete Research, 2009, 39(6): 482-489.

[88] [88] GIJBELS K, NGUYEN H, KINNUNEN P, et al. Radiological and leaching assessment of an ettringite-based mortar from ladle slag and phosphogypsum[J]. Cement and Concrete Research, 2020, 128: 105954.

[89] [89] CODY A M, LEE H, CODY R D, et al. The effects of chemical environment on the nucleation, growth, and stability of ettringite ［Ca3Al(OH)6］2(SO4)3·26H2O[J]. Cement and Concrete Research, 2004, 34(5): 869-881.

[90] [90] WAN D W, ZHANG W Q, TAO Y, et al. The impact of Fe dosage on the ettringite formation during high ferrite cement hydration[J]. Journal of the American Ceramic Society, 2021, 104(7): 3652-3664.

[91] [91] MSCHNER G, LOTHENBACH B, ROSE J, et al. Solubility of fe-ettringite (Ca6 ［Fe(OH)6］2(SO4)3·26H2O)[J]. Geochimica et Cosmochimica Acta, 2008, 72(1): 1-18.

[92] [92] WANG Z Y, SUN T, OUYANG G S, et al. Role of polyferric sulphate in hydration regulation of phosphogypsum-based excess-sulphate slag cement: a multiscale investigation[J]. Science of the Total Environment, 2024, 948: 173750.

[95] [95] WANG Z Y, SHUI Z H, LI Z W, et al. Hydration characterization of Mg2+ blended excess-sulphate phosphogypsum slag cement system during early age[J]. Construction and Building Materials, 2022, 345: 128191.

[96] [96] WANG Z Y, OUYANG G S, LI Z W, et al. Excess-sulphate phosphogypsum slag cement blended with magnesium ion: part Ⅱ-the long-term microstructure characterisation and phase evolution[J]. Construction and Building Materials, 2024, 431: 136513.

[97] [97] XIE Y F, SUN T, SHUI Z H, et al. The impact of carbonation at different CO2 concentrations on the microstructure of phosphogypsum-based supersulfated cement paste[J]. Construction and Building Materials, 2022, 340: 127823.

[99] [99] WANG Z Y, SHUI Z H, SUN T, et al. Effect of MgO and superfine slag modification on the carbonation resistance of phosphogypsum-based cementitious materials: based on hydration enhancement and phase evolution regulation[J]. Construction and Building Materials, 2024, 415: 134914.