Page 80 - 水利学报2021年第52卷第11期
P. 80

5  结论


                  (1)试验成功制备水泥熟料与 PVP 形成的类细胞体,并通过场发电子显微镜与能谱仪确定形貌与
               结构,确认类细胞体为水泥熟料被 PVP 包裹形成的产物。
                  (2)通过激光粒度仪确定各组类细胞体粒径级配,各组类细胞体 45 μm 筛余量仍不大于 30%,符
               合相关国家标准。
                  (3)试验发现,类细胞体外包膜厚度随 PVP 掺入量增加而逐渐增大,最小膜厚为 3.82 μm,最大
               膜厚为 9.3 μm。
                  (4)在 0~28 d 的养护龄期中,添加类细胞体的试样抗压强度恢复与损伤程度均优于未添加试
               样,并且最优恢复期随外包膜厚度增加而逐渐推迟。
                  (5)添加类细胞体的试样在养护 28 d 后,相较于未添加类细胞体的试样,其内部孔隙组成更优,
               孔隙数量更少,孔径更小,有更加优秀的自愈性能。


               参   考   文   献:


                [ 1 ] FENG Jianhang,DONG Hua,WANG Ruixing,et al . A novel capsule by poly(ethylene glycol)granulation for
                       self-healing concrete[J]. Cement and Concrete Research,2020,133:106053 .
                [ 2 ] 王立成,武少赟 . 混凝土劈拉开裂和裂缝自愈合机理[J]. 水利学报,2019,50(7):787-797 .
                [ 3 ] 张廷毅,汪自力,郑光和,等 . 碳化与硫酸盐溶液干湿循环后混凝土断裂韧度[J]. 水利学报,2016,47
                      (8):1062-1069 .
                [ 4 ] 王立成,穆林钧,邹凯 . 裂缝对混凝土中水分传输影响研究进展[J]. 水利学报,2021,52(6):647-658
                [ 5 ] MARIO DE ROOIJ,KIM VAN TITTELBOOM,NELE DE BELIE,et al . Self-Healing Phenomena in Ce⁃
                       ment-Based Materials[M]. Springer,Dordrecht,2013 .
                [ 6 ] SINAN ALTIN,TUĞRUL TANKUT,ÖZGÜR ANIL,YUSUF DEMIREL . Response of reinforced concrete beams
                       with clamps applied externally:an experimental study[J]. Engineering Structures,2003,25(9):1217-1229 .
                [ 7 ] HUANG Haoliang,YE Guang,QIAN Chunxiang,et al . Self-healing in cementitious materials:Materials,meth⁃
                       ods and service conditions[J]. Materials & Design,2016,92:499-511 .
                [ 8 ] LI Chen,WU Mengxue,CHEN Qing,et al . Chemical and mineralogical alterations of concrete subjected to
                       chemical attacks in complex underground tunnel environments during 20-36 years[J]. Cement and Concrete Com⁃
                       posites,2018,86:139-159 .
                [ 9 ] 吕忠,陈惠苏 . 水泥基材料裂缝自主愈合研究进展[J]. 硅酸盐学报,2014,42(2):156-168 .
                [ 10] MURAKAMI T,AHN T H,HASHIMOTO T,et al . A study on new repair methods for subway tunnels using
                       crack self-healing technologies[J]. Journal of Ceramic Processing Research,2015,16(S1):95-97 .
                [ 11] SAAD Issa Sarsam,MOHAMMED Fadhel Suliman . Healing of concrete cracking with the aid of bacteria[J]. Ad⁃
                       vancements in Materials,2018,2(6):100-109 .
                [ 12] LI Wenting,DONG Biqin,YANG Zhengxian,et al . Recent Advances in Intrinsic Self-Healing Cementitious Ma⁃
                       terials[J]. Advanced Materials,2018,30(17):1705679 .
                [ 13] LI Chen,ZHU Hongbo,WU Mengxue,et al . Pozzolanic reaction of fly ash modified by fluidized bed reactor-va⁃
                       por deposition[J]. Cement and Concrete Research,2017,92:98-109 .
                [ 14] ADAM NEVILLE . Autogenous healing-a concrete miracle?[J]. Concrete International,2002,24(11):76-82 .
                [ 15] CLAUDIA Stuckrath,RICARDO Serpell,LORETO M,et al . Quantification of chemical and biological calcium
                       carbonate precipitation:Performance of self-healing in reinforced mortar containing chemical admixtures[J]. Ce⁃
                       ment and Concrete Composites,2014,50:10-15 .
                [ 16] LEE YONG-SOO,RYOU JAE-SUK . Self healing behavior for crack closing of expansive agent via granulation/
                       film coating method[J]. Construction and Building Materials,2014,71:188-193 .
                [ 17] LEE YONG-SOO,RYOU JAE-SUK,PRABIR K S . Crack healing performance of PVA-coated granules made of
                 — 1338  —
   75   76   77   78   79   80   81   82   83   84   85