| 激发剂对SCM-Ⅰ型炉渣基胶凝材料强度特性的影响 |
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| 引用本文： | 何哲祥,魏真,李翔,肖威.激发剂对SCM-Ⅰ型炉渣基胶凝材料强度特性的影响[J].有色金属科学与工程,2017,8(5):52-57. |
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| 作者姓名： | 何哲祥 魏真 李翔 肖威 |
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| 作者单位： | 1.中南大学冶金与环境学院环境工程研究所，长沙 410083 |
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| 基金项目： | 国家“十二五”科技支撑计划项目2012BAC09B02 |
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| 摘 要： | 以炉渣基复合胶凝材料为主要原料, 研究不同激发剂对SCM-Ⅰ型胶凝材料的激发效果并通过XRD与SEM分析, 从微观结构与水化产物的角度探讨不同激发剂对SCM-Ⅰ型胶凝材料强度的影响.结果表明:碱激发剂中氢氧化钠与氢氧化钙均具有一定的激发效果，添加氢氧化钙比未添加激发剂的28 d抗压强度提高了34.77 %，而硅酸钠对强度的提高起到了抑制作用，在其掺量为0.75 %时，抗压强度下降了45.15 %，添加0.50 %硫酸钠的28 d抗压强度提高7.90 %，激发效果并不明显.氯盐激发剂中，添加1.00 %的氯化钙与氯化钠，分别比未添加激发剂的28 d抗压强度提高了68.08 %与5.62 %.添加氯化钙后促水化反应的进一步进行，并生成大量的钙矾石；添加硅酸钠后抑制了C-S-H凝胶的生成，降低了胶凝材料的强度.
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| 关 键 词： | 炉渣 激发剂 胶凝材料 水化产物 微观结构 |
| 收稿时间： | 2017-02-15 |
Impacts of different activators on the strength properties of SCM-Ⅰ furnace slag based cementing materials |
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| Affiliation: | 1.Institute of Environment Engineering, School of Metallurgy and Environment, Central South University, Changsha 410083, China2.Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution, Changsha 410083, China |
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| Abstract: | With the cementing materials based on furnace slag used as main raw material, this study analyzed the effects of different kinds of activators on SCM-Ⅰ cementing materialsbased on furnace slag. The analysis of SEM and XRD, and perspectives of microscopic and hydration products were added to the study. The results show that alkali-activators like Ca(OH)2, NaOH have certain activation effect. The addition of Ca(OH)2 has increased the 28 d compressive strength of cementing materials by 34.77 %. Na2SiO3 has inhibitory effect on the strength when the mixing amount is 0.75 % and the strength has depressed by 45.15 %. The compressive strength increases 7.90 % when 0.50 % of Na2SO4 is added, which shows that the activation effect is insignificant. When 1.00 % of the mixing amount of chloride activators such as NaCl and CaCl2 is added, the compressive strength increasesby 68.08 % and 5.62 % respectively. CaCl2 promotes the hydration reaction and a lot of ettringite is formed. The addition of Na2SiO3 inhibits the formation of C-S-H gels, which declines the strength of the cementing materials |
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