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来源：百度知道 编辑：UC知道 时间：2024/05/28 06:26:27
Abstract
The chemical interactions between natural siliceous aggregates and a low-Ca alkali-activated cement (geopolymer) were studied. By leaching ideal aluminosilicate minerals such as kaolinite and albite in various alkaline solutions with or without soluble silicates, it was found that addition of 0.5 M SiO2 to a highly alkaline activating solution ([OH−]0=5 to 10 M) was responsible for the formation of an Al-enriched aluminosilicate surface through the initial non-stoichiometric and Si preferential dissolution of the parent aluminosilicates. This then facilitated soluble silicate deposition from the activating solutions onto the Al-rich surfaces, which resulted in the formation of a dense deposited aluminosilicate gel
interfacial layer. This aluminosilicate interface formed during albite leaching ([OH−]0=5 to 10 M and [SiO2]0=0.5 M) was found to possess a
similar Si/Al ratio to the real interface between a siliceous aggregate slice (basalt or siltstone)
The chemical interactions between natural siliceous aggregates and a low-Ca alkali-activated cement (geopolymer) were studied. By leaching ideal aluminosilicate minerals such as kaolinite and albite in various alkaline solutions with or without soluble silicates, it was found that addition of 0.5 M SiO2 to a highly alkaline activating solution ([OH−]0=5 to 10 M) was responsible for the formation of an Al-enriched aluminosilicate surface through the initial non-stoichiometric and Si preferential dissolution of the parent aluminosilicates. This then facilitated soluble silicate deposition from the activating solutions onto the Al-rich surfaces, which resulted in the formation of a dense deposited aluminosilicate gel
interfacial layer. This aluminosilicate interface formed during albite leaching ([OH−]0=5 to 10 M and [SiO2]0=0.5 M) was found to possess a
similar Si/Al ratio to the real interface between a siliceous aggregate slice (basalt or siltstone)
摘要
化学相互作用自然硅质总量和低钙碱水泥（地聚合物）进行了研究。理想的浸铝硅酸盐矿物，如高岭石和钠长石在不同碱性解决或不可溶性硅酸盐，发现增加了0.5米的高度，以二氧化硅活化碱性溶液（ [羟] 0 = 5 10米）负责成立一个基地丰富铝表面通过最初的非化学计量和Si优惠解散母公司aluminosilicates 。这就促进可溶性硅酸盐沉积从激活的解决办法上富铝表面，从而形成了一个密集交存硅酸铝凝胶
界面层。这期间形成的硅酸铝钠界面浸出（ [羟] 0 = 5 10米和[二氧化硅] 0 = 0.5米）被发现藏有
类似硅/ Al比的实际之间的相互关系硅质骨料片（玄武岩或粉砂岩）和低钙粉煤灰/高岭石矿物聚合物，激活
一个激活解决[羟] 0 = 10米和[二氧化硅] 0 = 2.5先生由于相似之处激活解决方案，用于和接口
成立，这是假定，一个类似的形成机制是分担交存硅酸铝界面形成的浸出和
'真正的'地聚合物混凝土合成。没有可溶性硅酸盐此外，如果解决低碱度（ [羟] 0 = 0.6米和[二氧化硅] 0 = 0和
0.5米）的使用，在Al -丰富反应表面没有形成，没有交存硅酸铝界面观察到这些系统。
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关键词：骨料;碱水泥;界面过渡区;微观结构