[1] [1] LEFEVER G, VAN HEMELRIJCK D, AGGELIS D G, et al. Evaluation of self-healing in cementitious materials with superabsorbent polymers through ultrasonic mapping[J]. Constr Build Mater, 2022, 344: 128272.

[5] [5] WU M, JOHANNESSON B, GEIKER M. A review: self-healing in cementitious materials and engineered cementitious composite as a self-healing material[J]. Constr Build Mater, 2012, 28(1): 571-583.

[8] [8] HONG G, CHOI S. Rapid self-sealing of cracks in cementitious materials incorporating superabsorbent polymers[J]. Constr Build Mater, 2017, 143: 366-375.

[9] [9] WANG C Y, BU Y H, GUO S L, et al. Self-healing cement composite: Amine- and ammonium-based pH-sensitive superabsorbent polymers[J]. Cem Concr Compos, 2019, 96: 154-162.

[10] [10] FENG J H, DONG H, WANG R X, et al. A novel capsule by poly (ethylene glycol) granulation for self-healing concrete[J]. Cem Concr Res, 2020, 133: 106053.

[11] [11] WANG J Y, MIGNON A, TRENSON G, et al. A chitosan based pH-responsive hydrogel for encapsulation of bacteria for self-sealing concrete[J]. Cem Concr Compos, 2018, 93: 309-322.

[12] [12] HU M M, GUO J T, DU J B, et al. Development of Ca2+-based, ion-responsive superabsorbent hydrogel for cement applications: self-healing and compressive strength[J]. J Colloid Interface Sci, 2019, 538: 397-403.

[13] [13] MIGNON A, VERMEULEN J, GRAULUS G J, et al. Characterization of methacrylated alginate and acrylic monomers as versatile SAPs[J]. Carbohydr Polym, 2017, 168: 44-51.

[16] [16] GARTNER E M, TANG F J, WEISS S J. Saturation factors for calcium hydroxide and calcium sulfates in fresh Portland cement pastes[J]. J Am Ceram Soc, 1985, 68(12): 667-673.

[17] [17] SCHWEINS R, HUBER K. Collapse of sodium polyacrylate chains in calcium salt solutions[J]. Eur Phys J E, 2001, 5(1): 117-126.

[18] [18] LEE H X D, WONG H S, BUENFELD N R. Self-sealing of cracks in concrete using superabsorbent polymers[J]. Cem Concr Res, 2016, 79: 194-208.

[19] [19] LEE H D, WONG H S, BUENFELD N R. Potential of superabsorbent polymer for self-sealing cracks in concrete[J]. Adv Appl Ceram, 2010, 109(5): 296-302.

[20] [20] BOSE B, DAVIS C R, ERK K A. Microstructural refinement of cement paste internally cured by polyacrylamide composite hydrogel particles containing silica fume and nanosilica[J]. Cem Concr Res, 2021, 143: 106400.

[21] [21] HE R, TAN Y W, CHEN H X, et al. Preparation and properties of novel superabsorbent polymer (SAP) composites for cementitious materials based on modified metakaolin[J]. Constr Build Mater, 2020, 258: 119575.

[23] [23] DENG H W, LIAO G Y. Assessment of influence of self-healing behavior on water permeability and mechanical performance of ECC incorporating superabsorbent polymer (SAP) particles[J]. Constr Build Mater, 2018, 170: 455-465.

[24] [24] SNOECK D, DEBO J, DE BELIE N. Translucent self-healing cementitious materials using glass fibers and superabsorbent polymers[J]. Dev Built Environ, 2020, 3: 100012.

[25] [25] LEFEVER G, SNOECK D, AGGELIS D G, et al. Evaluation of the self-healing ability of mortar mixtures containing superabsorbent polymers and nanosilica[J]. Materials, 2020, 13(2): 380.

[26] [26] WYRZYKOWSKI M, IGARASHI S I, LURA P, et al. Recommendation of RILEM TC 260-RSC: using superabsorbent polymers (SAP) to mitigate autogenous shrinkage[J].Mater Struct, 2018, 51(5): 1-7.

[27] [27] GRUYAERT E, DEBBAUT B, SNOECK D, et al. Self-healing mortar with pH-sensitive superabsorbent polymers: testing of the sealing efficiency by water flow tests[J]. Smart Mater Struct, 2016, 25(8): 084007.

[29] [29] OLAWUYI B J, BABAFEMI A J, BOSHOFF W P. Early-age and long-term strength development of high-performance concrete with SAP[J]. Constr Build Mater, 2021, 267: 121798.

[30] [30] SNOECK D, VELASCO L F, MIGNON A, et al. The effects of superabsorbent polymers on the microstructure of cementitious materials studied by means of sorption experiments[J]. Cem Concr Res, 2015, 77: 26-35.

[31] [31] SUN B B, WU H, SONG W M, et al. Design methodology and mechanical properties of Superabsorbent Polymer (SAP) cement-based materials[J]. Constr Build Mater, 2019, 204: 440-449.

[32] [32] ZHANG X, QIAN C X. Effects of the crack geometric features on the probability density of spherical healing agent particles in concrete[J]. Constr Build Mater, 2021, 301: 124083.

[34] [34] WOYCIECHOWSKI P, KALINOWSKI M. The influence of dosing method and material characteristics of superabsorbent polymers (SAP) on the effectiveness of the concrete internal curing[J]. Materials, 2018, 11(9): 1600.

[35] [35] TAN Y W, CHEN H X, WANG Z D, et al. Performances of cement mortar incorporating superabsorbent polymer (SAP) using different dosing methods[J]. Materials, 2019, 12(10): 1619.

[36] [36] SNOECK D, SCHAUBROECK D, DUBRUEL P, et al. Effect of high amounts of superabsorbent polymers and additional water on the workability, microstructure and strength of mortars with a water-to-cement ratio of 0.50[J]. Constr Build Mater, 2014, 72: 148-157.

[37] [37] CHINDASIRIPHAN P, YOKOTA H, PIMPAKAN P. Effect of fly ash and superabsorbent polymer on concrete self-healing ability[J]. Constr Build Mater, 2020, 233: 116975.

[38] [38] SULEIMAN A R, ZHANG L V, NEHDI M L. Quantifying crack self-healing in concrete with superabsorbent polymers under varying temperature and relative humidity[J]. Sustainability, 2021, 13(24): 13999.

[39] [39] MIGNON A, SNOECK D, DUBRUEL P, et al. Crack mitigation in concrete: superabsorbent polymers as key to success?[J]. Materials, 2017, 10(3): 237.

[40] [40] BALOCH H, USMAN M, RIZWAN S A, et al. Properties enhancement of super absorbent polymer (SAP) incorporated self-compacting cement pastes modified by nano silica (NS) addition[J]. Constr Build Mater, 2019, 203: 18-26.

[42] [42] BENTZ D P, JENSEN O M. Mitigation strategies for autogenous shrinkage cracking[J]. Cem Concr Compos, 2004, 26(6): 677-685.

[43] [43] CRAEYE B, GEIRNAERT M, DE SCHUTTER G. Super absorbing polymers as an internal curing agent for mitigation of early-age cracking of high-performance concrete bridge decks[J]. Constr Build Mater, 2011, 25(1): 1-13.

[44] [44] YANG Y Z, LEPECH M D, YANG E H, et al. Autogenous healing of engineered cementitious composites under wet-dry cycles[J]. Cem Concr Res, 2009, 39(5): 382-390.

[45] [45] ZHANG C C, GUAN X C, TIAN J L, et al. Corrosion resistance of RC/UHTCC beams with various healing promoters in marine environment[J]. Cem Concr Compos, 2022, 131: 104604.

[46] [46] SNOECK D, DE BELIE N. Autogenous healing in strain-hardening cementitious materials with and without superabsorbent polymers: an 8-year study[J]. Front Mater, 2019, 6: 48.

[47] [47] LEPECH M D, LI V C. Water permeability of engineered cementitious composites[J]. Cem Concr Compos, 2009, 31(10): 744-753.

[48] [48] HOU S L, LI K, WU Z M, et al. Quantitative evaluation on self-healing capacity of cracked concrete by water permeability test-A review[J]. Cem Concr Compos, 2022, 127: 104404.

[49] [49] VAN MULLEM T, GRUYAERT E, DEBBAUT B, et al. Novel active crack width control technique to reduce the variation on water permeability results for self-healing concrete[J]. Constr Build Mater, 2019, 203: 541-551.

[50] [50] PARK B, CHOI Y C. Self-healing capability of cementitious materials with crystalline admixtures and super absorbent polymers (SAPs)[J]. Constr Build Mater, 2018, 189: 1054-1066.

[51] [51] TENRIO FILHO J R, VERMOESEN E, MANNEKENS E, et al. Enhanced durability performance of cracked and uncracked concrete by means of smart in-house developed superabsorbent polymers with alkali-stable and-unstable crosslinkers[J]. Constr Build Mater, 2021, 297: 123812.

[52] [52] GWON S, AHN E, SHIN M. Water permeability and rapid self-healing of sustainable sulfur composites using superabsorbent polymer and binary cement[J]. Constr Build Mater, 2020, 265: 120306.

[53] [53] SNOECK D, VAN DEN HEEDE P, VAN MULLEM T, et al. Water penetration through cracks in self-healing cementitious materials with superabsorbent polymers studied by neutron radiography[J]. Cem Concr Res, 2018, 113: 86-98.

[54] [54] SNOECK D, STEUPERAERT S, VAN TITTELBOOM K, et al. Visualization of water penetration in cementitious materials with superabsorbent polymers by means of neutron radiography[J]. Cem Concr Res, 2012, 42(8): 1113-1121.

[55] [55] VAN MULLEM T, ANGLANI G, DUDEK M, et al. Addressing the need for standardization of test methods for self-healing concrete: an inter-laboratory study on concrete with macrocapsules[J]. Sci Technol Adv Mater, 2020, 21(1): 661-682.

[56] [56] TANG W, KARDANI O, CUI H Z. Robust evaluation of self-healing efficiency in cementitious materials-A review[J]. Constr Build Mater, 2015, 81: 233-247.

[57] [57] HOMMA D, MIHASHI H, NISHIWAKI T. Self-healing capability of fibre reinforced cementitious composites[J]. J Adv Concr Technol, 2009, 7(2): 217-228.

[58] [58] NISHIWAKI T, KODA M, YAMADA M, et al. Experimental study on self-healing capability of FRCC using different types of synthetic fibers[J]. J Adv Concr Technol, 2012, 10(6): 195-206.

[59] [59] WIKTOR V, JONKERS H M. Quantification of crack-healing in novel bacteria-based self-healing concrete[J]. Cem Concr Compos, 2011, 33(7): 763-770.

[60] [60] SNOECK D, DEWANCKELE J, CNUDDE V, et al. X-ray computed microtomography to study autogenous healing of cementitious materials promoted by superabsorbent polymers[J]. Cem Concr Compos, 2016, 65: 83-93.

[61] [61] VAN TITTELBOOM K, SNOECK D, VONTOBEL P, et al. Use of neutron radiography and tomography to visualize the autonomous crack sealing efficiency in cementitious materials[J]. Mater Struct, 2013, 46(1): 105-121.

[62] [62] HONG G, CHOI S. Modeling rapid self-sealing of cracks in cementitious materials using superabsorbent polymers[J]. Constr Build Mater, 2018, 164: 570-578.

[64] [64] LEFEVER G, DANNY V H, DIDIER S, et al. Self-healing assessment of cementitious mortars through ultrasonic monitoring[J]. Cem Concr Compos, 2022, 133: 104683.

[65] [65] ZHU Y, ZHANG Z C, CHEN X, et al. Non-destructive methods to evaluate the self-healing behavior of engineered cementitious composites (ECC)[J]. Constr Build Mater, 2020, 230: 116753.

[66] [66] AGGELIS D G, SHIOTANI T. Repair evaluation of concrete cracks using surface and through-transmission wave measurements[J]. Cem Concr Compos, 2007, 29(9): 700-711.

[67] [67] LIU S K, BUNDUR Z B, ZHU J Y, et al. Evaluation of self-healing of internal cracks in biomimetic mortar using coda wave interferometry[J]. Cem Concr Res, 2016, 83: 70-78.