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Production of antibacterial cement composites containing ZnO/lignin and ZnO–SiO2/lignin hybrid admixtures
Cement and Concrete Composites ( IF 10.8 ) Pub Date : 2021-09-10 , DOI: 10.1016/j.cemconcomp.2021.104250
Izabela Klapiszewska 1 , Anna Parus 2 , Łukasz Ławniczak 2 , Teofil Jesionowski 2 , Łukasz Klapiszewski 2 , Agnieszka Ślosarczyk 1
Affiliation  

Inorganic–organic systems based on ZnO or ZnO–SiO2 and lignin were used for the first time to counteract the biodeterioration of cement composites. The stability of the oxide–lignin and interoxide–lignin combinations was confirmed by Fourier transform infrared spectroscopy, while electrokinetic studies confirmed the stability of the systems in the alkaline environment of the cement matrix. Moreover, lignin-enriched admixtures showed very good water wettability, which enabled their uniform dispersion in the cement matrix. Physical and mechanical tests confirmed the retarding effect of zinc oxide on the hydration of the cement binder in the initial setting period, which was manifested by lower mechanical parameters up to the 7th day of setting. The use of interoxide systems with silica balanced this adverse effect. The designed systems based on ZnO and lignin caused the inactivation of both bacterial and fungal pathogens, the effect being weaker in the case of the systems with silica.



中文翻译:

生产含有 ZnO/木质素和 ZnO-SiO2/木质素混合外加剂的抗菌水泥复合材料

基于 ZnO 或 ZnO-SiO 2 的无机-有机体系和木质素首次用于抵消水泥复合材料的生物降解。氧化物-木质素和氧化物-木质素组合的稳定性通过傅里叶变换红外光谱得到证实,而电动研究证实了系统在水泥基质碱性环境中的稳定性。此外,富含木质素的外加剂表现出非常好的水润湿性,这使得它们能够均匀地分散在水泥基体中。物理和机械测试证实了氧化锌在初凝期对水泥粘结剂水化的延缓作用,这表现为直到凝结第 7 天的较低机械参数。使用含有二氧化硅的中间氧化物系统平衡了这种不利影响。

更新日期:2021-09-15
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