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剛玉質自流澆注料流變性和流動性的關系

Relationship between rheological properties and flowability of a corundum based self-flow castable

  • 摘要: 采用澆注料流變儀、L型流動性測試裝置和自流值測定裝置,測定了加水量、分散劑(FS10)、純鋁酸鈣水泥和α-Al2O3微粉對剛玉質自流澆注料的流變性和流動性的影響,并分析了流變性和流動性之間的關系.實驗結果表明:隨加水量增加(質量分數4.9%~5.3%),相對屈服應力、相對塑性黏度和相對平均黏度均逐漸減小,自流值和流動速度逐漸增大.隨分散劑FS10加入量的增加(質量分數0.16%~0.20%),相對屈服應力、相對塑性黏度和相對平均黏度逐漸減小,自流值和流動速度逐漸增大;分散劑FS10加入量繼續增大時(0.20%~0.22%),相對屈服應力、相對塑性黏度和相對平均黏度顯著增大,而自流值和流動速度大幅下降.隨純鋁酸鈣水泥加入量增加(質量分數1%~4%),流變參數和流動參數有一定的變化,但變化不明顯.隨α-Al2O3微粉加入量的增加(質量分數9%~12%),相對屈服應力和相對平均黏度均減小,相對塑性黏度變化不大,自流值變化不大,流動速度加快.剛玉質自流澆注料流變參數和流動參數之間的關系為:自流值和相對屈服應力有較好的相關性,而流動速度和相對平均黏度有較好的相關性.

     

    Abstract: With the castable rheometer,L-box flowability test apparatus and self-flow test apparatus,the influence of water addition,dispersant content (FS10),aluminate cement content and α-Al2O3 content on the rheology and flowability of a corundum-based self-flow castable were researched,and the relationship between rheological properties and flowability of the castable were analyzed.The results show that with the increase of water addition (4.9% to 5.3%,mass fraction),the relative yield stress,relative plastic viscosity and relative average viscosity decrease,but the self-flow value and flow velocity increase.With the increase of dispersant FS10 (0.16% to 0.20%,mass fraction),the relative yield stress,relative plastic viscosity and relative average viscosity decrease,but the self-flow value and flow velocity increase.With more dispersant FS10 additions (0.20% to 0.22%),the relative yield stress,relative plastic viscosity and relative average viscosity increase markedly,but the self-flow value and self-flow velocity decrease remarkably.With the increase of aluminate cement (1% to 4%,mass fraction),the rheology and flowability parameters have some change,but not obvious.With the increase of α-Al2O3 addition (9% to 12%,mass fraction),the relative yield stress and relative average viscosity decrease,the relative plastic viscosity and self-flow value have little change,but the self-flow velocity increase.The relationship between rheology parameters and flowability parameters of the corundum-based self-flow castable is shown as the following:the self flow value and relative yield stress have good relevance;the flow velocity and relative average viscosity have good relevance.

     

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