摘要
采用浇注料流变仪、L型流动性测试装置和自流值测定装置,测定了加水量、分散剂(FS10)、纯铝酸钙水泥和α-Al2O3微粉对刚玉质自流浇注料的流变性和流动性的影响,并分析了流变性和流动性之间的关系.实验结果表明:随加水量增加(质量分数4.9%～5.3%),相对屈服应力、相对塑性黏度和相对平均黏度均逐渐减小,自流值和流动速度逐渐增大.随分散剂FS10加入量的增加(质量分数0.16%～0.20%),相对屈服应力、相对塑性黏度和相对平均黏度逐渐减小,自流值和流动速度逐渐增大;分散剂FS10加入量继续增大时(0.20%～0.22%),相对屈服应力、相对塑性黏度和相对平均黏度显著增大,而自流值和流动速度大幅下降.随纯铝酸钙水泥加入量增加(质量分数1%～4%),流变参数和流动参数有一定的变化,但变化不明显.随α-Al2O3微粉加入量的增加(质量分数9%～12%),相对屈服应力和相对平均黏度均减小,相对塑性黏度变化不大,自流值变化不大,流动速度加快.刚玉质自流浇注料流变参数和流动参数之间的关系为:自流值和相对屈服应力有较好的相关性,而流动速度和相对平均黏度有较好的相关性.
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-Al 2O 3 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-Al 2O 3 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.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2010年第2期239-244,共6页
Journal of University of Science and Technology Beijing
关键词
刚玉
浇注料
流变性
流动性
corundum
castable
rheological property
flowability
