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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。
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