Influence of tobermorite formation on mechanical properties of hydrothermally solidified blast furnace slag
Influence of tobermorite formation on mechanical properties of hydrothermally solidified blast furnace slag
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DOI：
10.1007/s10853-007-2025-8
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发表时间：
2008-04
影响因子：
4.5
通讯作者：
Z. Jing;F. Jin;T. Hashida;N. Yamasaki;E. H. Ishida
中科院分区：
文献类型：
--
作者：
Z. Jing;F. Jin;T. Hashida;N. Yamasaki;E. H. Ishida
采用水热法固化高炉水冷渣（BFWS），在200 °C、1.56 MPa的饱和蒸汽压下，加入石英或粉煤灰，在反应釜中固化12 h。结果表明，石英或粉煤灰的加入有利于雪硅钙石的形成，雪硅钙石的形成对材料的抗拉强度有显著影响。强度发展取决于雪硅钙石的形成和形成的雪硅钙石的密度。过量添加石英会影响固化体中雪硅钙石的形成，从而导致强度劣化。粉煤灰可作为水热固化高炉水玻璃的添加剂，既节能又降低成本。
A hydrothermal processing method has been used to solidify blast furnace water-cooled slag (BFWS), in which the BFWS could be solidified in an autoclave under saturated steam pressure (1.56 MPa) at 200 °C for 12 h by the additions of quartz or coal fly ash. The experimental results showed that the addition of the quartz or fly ash was favorable to the formation of tobermorite, and the tobermorite formation in turn exerted a signifiant influence on tensile strength. The strength development depended on both tobermorite formation and the density of the tobermorite formed. The excessive addition of quartz appeared to cause strength deterioration due to the fact that the residual quartz affected the formation of tobermorite in the solidified specimens. Fly ash could be used as an additive for the hydrothermal solidification of BFWS, which may offer both energy saving and cost reduction.