Effect of Alkali Metals on the Activation of GGBFS

• Main Authors: Chang，Hung-Ming, 張宏銘
• Other Authors: Ran Huang
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/91421402719845717254

碩士 === 國立臺灣海洋大學 === 河海工程學系 === 105 === The study aims to investigate the influence on adding Alkali metal to mortar and its degree of effect on activating Ground Granulated Blast Furnace Slag(GGBFS). Through the control group and adding different portion of GGBFS as well as different portion of Alkali metal experiment data to compare its degree of effect both on its strength and its fluidity, this study tried to figure out the best proportion of replacement of Alkali metal and GGBFS in the mortar. GGBFS added to an alkali metal compressive strength for 28 days, with 120 BF ballast powder (with 60% quantity), which is higher than the average compressive strength of cement mortar strength test, adding 120 BF ballast powder (with 60% quantity) 0.1% alkali metal is the best. Blast furnace ballast powder 100 level (fineness of 4200 cm2/g) and 120 level (fitness of 5200 cm2/g) as well as after activating Alkali metal, in this study, the best result is known to be the 60% quantity of blast furnace ballast powder. When cement mortar is replaced by blast furnace ballast powder, the fluidity of cement mortar will decrease and Alkali metal is able to elevate the fluidity of cement mortar.. Also, the quantity of Alkali metal over 0.2 is considered to increase considerably. Conversely, after the hydration of blast furnace ballast powder and Alkali metal, the fluidity of cement mortar is lower than the general concrete. However, it also revealed that the quantity of Alkali metal has its effect on increasing the fluidity of cement mortar. This study, after the hydration of blast furnace ballast powder and Alkali metal, the result of fluidity is not considered to be satisfactory. As a result, it is recommended to add different kinds of Alkali metal for further research to investigate adding different kinds of Alkali metal and its best fluidity.