论文标题
原材料的超养生火山性质对罗马海洋混凝土延展性的重要性
The Importance of the Ultra-alkaline Volcanic Nature of the Raw Materials to the Ductility of Roman Marine Concrete
论文作者
论文摘要
罗马时代的混凝土是长期物理化学弹性的标志性体现。我们通过在罗马海洋混凝土（RMC）对意大利和以色列的罗马海洋混凝土（RMC）上的结构显微镜和化学光谱进行宏观机械应力的延时（4-D）层析成像来研究跨观测量表的基础。应力 - 应变测量结果表明，RMC蠕变并表现出延性变形模式。由于基质 - 聚集键的增加，发现来自意大利标本的渗透性很低。结构和化学成像显示存在富含硫的富含硫的纤维矿物质，这些矿物质与钙 - 铝硅酸盐 - 硅酸盐水合物和地理聚合物的化学性质相互交织和嵌入。后者可能反映了主要原始材料的超养生火山性质。我们假设该杂交基质中富含硫的纤维的精细交织增强了聚集键合，这完全有助于RMC的耐用性。
Roman-era concrete is the iconic embodiment of long-term physicochemical resilience. We investigated the basis of this behavior across scales of observations by coupling time-lapse (4-D) tomographic imaging of macroscopic mechanical stressing with structural microscopy and chemical spectroscopy on Roman marine concrete (RMC) from ancient harbors in Italy and Israel. Stress-strain measurements revealed that RMC creeps and exhibits a ductile deformation mode. The permeability of specimens from Italy were found to be low due to increased matrix-aggregate bonding. Structural and chemical imaging shows the presence of well-developed sulfur-rich, fibrous minerals that are intertwined and embedded in a crossbred matrix having the chemical traits of both a calcium-aluminum-silicate-hydrate and a geopolymer. This latter likely reflects the ultra-alkaline volcanic nature of the primary source materials. We hypothesize that the fine interweave of sulfur-rich fibers within this crossbred matrix enhances aggregate bonding, which altogether contributes to the durability of RMC.
