Nanoindentation Characteristics of Calcium Hydroxide-metakaolin Blended with Sodium Hydroxide Solutions
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2014年第1期
论文作者：何智海 钱春香 ZHANG Yi ZHAO Fei
文章页码：185 - 189
摘 要：In order to determine the active mechanism of metakaolin（MK） as partial replacement of cement in concrete from the nanoscale structure perspective, nanoindentation characteristics of calcium hydroxide（CH）-MK blended with 5 M sodium hydroxide（NaOH） solutions simulating the condition of MK in concrete has been studied. The results indicate that three distinct phases are found by the nanoindentation and BSE tests, such as HD C-S-H gel, LD C-S-H gel and the reaction products with the network structure, the residual unreacted MK and CH, respectively. The volume fraction of HD C-S-H gel is about 96% of all reaction product phases. This means that the use of MK in concrete can increase the volume fraction of HD C-S-H gel and thus will improve the properties of concrete.
何智海1,2，钱春香1,2，ZHANG Yi1,2，ZHAO Fei1,2
1. College of Materials Science and Engineering, Southeast University2. Jiangsu Key Lab of Construction Materials
摘 要：In order to determine the active mechanism of metakaolin（MK） as partial replacement of cement in concrete from the nanoscale structure perspective, nanoindentation characteristics of calcium hydroxide（CH）-MK blended with 5 M sodium hydroxide（NaOH） solutions simulating the condition of MK in concrete has been studied. The results indicate that three distinct phases are found by the nanoindentation and BSE tests, such as HD C-S-H gel, LD C-S-H gel and the reaction products with the network structure, the residual unreacted MK and CH, respectively. The volume fraction of HD C-S-H gel is about 96% of all reaction product phases. This means that the use of MK in concrete can increase the volume fraction of HD C-S-H gel and thus will improve the properties of concrete.
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