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为了研究细菌诱导碳酸钙在大理石、混凝土基材表层矿化沉积形成的人工层对基材加固保护的机理及性能,用X射线衍射、扫描电镜、压汞仪及超声波研究分析了矿化晶体物相,矿化层生长,沉积晶体对基材孔隙的影响以及矿化层黏结与保护效果。结果表明:矿化晶体为方解石和球文石;Ca2+源影响碳酸钙矿化沉积晶相,细菌在晶体矿化沉积过程中充当成核位点,且晶体均匀生长在基材表面;沉积致使试样孔隙率减少,但对孔隙分布无显著影响;矿化层与基材可以形成有效黏结。
In order to study the mechanism and properties of the artificial protective layer formed by mineralization and deposition of calcium carbonate on the surface of marble and concrete substrates, the effects of mineralized crystals Phase, mineralized layer growth, the influence of deposited crystal on the porosity of the substrate, and the effect of mineralization layer bonding and protection. The results showed that the mineralized crystals were calcite and spodumene. The Ca2 + source affected the mineralized sedimentary crystalline phase of calcium carbonate. Bacteria acted as the nucleation site during the mineralization and deposition, and the crystals grew uniformly on the surface of the substrate. The sample porosity decreases but has no significant effect on the pore distribution; the mineralized layer can form an effective bond with the substrate.