Abstract SuperAbsorbent Polymers (SAPs) are a promising admixture to obtain self-sealing and self-healing cementitious materials. They are able to physically block water penetration through cracks due to their swelling ability. This is very useful in a cementitious material which is prone to cracking leading to a reduced durability. The effectiveness of counteracting water penetration is of concern. Neutron radiography was performed in order to investigate the influence of SAPs on the water permeability through healed cracks with respect to a reference material without SAPs. The gravimetrically measured capillary absorption corresponded with the obtained results after image analysis and a quantitative analysis could be made. SAPs enhance the water impermeability and are able to seal and heal a crack effectively up to 100 μm. The healing was a main factor to impede water movement through cracks. This will lead to less water ingress in building infrastructures and a possible longer service life.

中文翻译：

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通过中子射线照相研究的具有高吸水性聚合物的自修复胶结材料裂缝中的水渗透

摘要 高吸水性聚合物 (SAPs) 是一种很有前途的外加剂，可用于获得自密封和自修复胶凝材料。由于它们的膨胀能力，它们能够物理地阻止水通过裂缝渗透。这在易于开裂导致耐久性降低的胶结材料中非常有用。阻止水渗透的有效性令人担忧。进行中子射线照相是为了研究 SAPs 对没有 SAPs 的参考材料通过愈合裂缝的水渗透率的影响。重量法测量的毛细管吸收与图像分析后获得的结果一致，可以进行定量分析。SAP 增强了水的不渗透性，能够有效地密封和愈合高达 100 微米的裂缝。愈合是阻碍水通过裂缝流动的主要因素。这将减少建筑基础设施的进水量，并可能延长使用寿命。