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首页> 外文会议>International conference on recent advances in concrete technology and sustainability issues >Investigation of the Foamed Concrete Properties Containing Nanosilica, as Compared with the Foamed Concrete Containing Microsilica
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Investigation of the Foamed Concrete Properties Containing Nanosilica, as Compared with the Foamed Concrete Containing Microsilica

机译：含纳米二氧化硅的发泡混凝土与含微二氧化硅的发泡混凝土的比较研究

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This paper investigates the properties of the foamed concrete containing Nano silica, as compared with the foamed concrete containing micro silica, as well as comparing the properties of these two concretes with the concrete witness concrete. To conduct this study, Nano silica with an average size of 12nm and 1 to 6% of the cement weight was used; in addition, micro silica with an average size of 230nm and 1 to 6% of the cement weight was utilized. In this study the size of the air-voids in the hardened concrete ranged from 0.1 to 1 mm. The air voids were due to the protein- based foaming agent. The Type 1 cement used in this project was based upon ASTM C 150 .The samples were produced in two forms, that is, with and without sand. The compressive strength test was conducted for the samples at the ages of 7 and 28 with an approximately dried density of 600 and 1600 kg/m3.The SEM images were obtained from the failure section. The results indicated that in initial days, samples containing Nano silica have greater compressive strength than those containing micro silica and also the no-sand samples containing Nano silica show a greater increase in the amount of compressive strength than those containing micro silica and witness samples. The micro structural examination of the foamed concrete by using the SEM images suggests the improvement in the concrete micro structure and mechanical properties containing Nano silica.
机译：与含微硅石的泡沫混凝土相比，本文研究了含纳米硅石的泡沫混凝土的性能，并将这两种混凝土与混凝土见证混凝土的性能进行了比较。为了进行这项研究，使用了平均粒径为12nm，水泥重量为1-6％的纳米二氧化硅。此外，还使用了平均粒径为230nm且水泥重量为1-6％的微二氧化硅。在这项研究中，硬化混凝土中气孔的大小范围为0.1到1毫米。气孔归因于基于蛋白质的发泡剂。本项目中使用的1型水泥基于ASTM C150。样品以两种形式生产，即有沙和无沙。对7和28岁的样品进行了抗压强度测试，干燥密度分别约为600和1600 kg / m3。结果表明，在最初的几天中，含有纳米二氧化硅的样品的抗压强度要比含有微量二氧化硅的样品的抗压强度高，并且含有纳米二氧化硅的无砂样品的抗压强度的增加量也要比含有微量二氧化硅和证人样品的抗压强度增加得更多。通过使用SEM图像对泡沫混凝土的微观结构检查表明，含纳米二氧化硅的混凝土微观结构和力学性能得到了改善。

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