倾斜管实验的膏体流变特性规律研究
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摘要
针对膏体流变特性难以真实测量的现象,自制一套能够有效还原工业现场的倾斜管道实验装置,对膏体流变特性参数进行测量,运用通径分析法探究膏体浓度、灰砂比对流变特性的影响规律。结果表明:膏体浓度、灰砂比对膏体流变参数的影响均为正相关,其中,浓度对屈服应力的影响水平比灰砂比对其影响水平大一个数量级,当灰砂比接近1∶25时,灰砂比的增大与减小并不能引起屈服应力明显的单调递增递减现象;浓度对塑性黏度的影响水平比灰砂比对其影响水平大,但在同一个数量级,膏体浓度较低时,会产生浓度低黏度大的现象。
Aiming at the phenomenon that the rheological behavior of paste is difficult to be measured factually,an inclined pipeline test device which can rebuild the industrial sites effectively was manufactured to survey the rheological parameters of the paste.The influencing law of paste concentration and cement-sand ratio on the rheological properties of the pastes was investigated by path analysis method.The result showed that: the influence of paste concentration and cement-sand ratio on the rheological parameters of the paste is positive correlation; The influence of concentration on yield stress is an order of magnitude larger than that of cement-sand ratio; When the cement-sand ratio approaches to 1 ∶ 25,the increase and decrease of cement-sand ratio does not cause obvious monotonically increasing and decreasing phenomenon of yield stress; The influence of concentration on plastic viscosity is higher than that of cement-sand ratio,under the same order of magnitude; When the paste concentration is low,a phenomenon of low concentration with large viscosity will be generated.
Aiming at the phenomenon that the rheological behavior of paste is difficult to be measured factually,an inclined pipeline test device which can rebuild the industrial sites effectively was manufactured to survey the rheological parameters of the paste.The influencing law of paste concentration and cement-sand ratio on the rheological properties of the pastes was investigated by path analysis method.The result showed that: the influence of paste concentration and cement-sand ratio on the rheological parameters of the paste is positive correlation; The influence of concentration on yield stress is an order of magnitude larger than that of cement-sand ratio; When the cement-sand ratio approaches to 1 ∶ 25,the increase and decrease of cement-sand ratio does not cause obvious monotonically increasing and decreasing phenomenon of yield stress; The influence of concentration on plastic viscosity is higher than that of cement-sand ratio,under the same order of magnitude; When the paste concentration is low,a phenomenon of low concentration with large viscosity will be generated.
引文
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[9]Angels Aragonès,Oriol Guasch.Conditions for transmission path analysis in energy distribution models[J].Mechanical Systems and Signal Processing,2016,12:68-69.
[2]王新民,张德明,张钦礼,等.基于FLOW-3D软件的深井膏体管道自流输送性能[J].中南大学学报:自然科学版,2011,42(7):2102-2108.Wang Xinmin,Zhang Deming,Zhang Qinli,et al.Pipeline self-flowing transportation property of paste based on FLOW-3D software in deep mine[J].Journal of Central South University:Science and Technology,2011,42(7):2102-2108.
[3]陈绍杰,刘小岩,韩野,等.充填膏体蠕变硬化特征与机制实验研究[J].岩石力学与工程学报,2016,35(3):570-578.Chen Shaojie,Liu Xiaoyan,Han Ye,et al.Experimental study of creep hardening characteristic and mechanism of filling paste[J].Chinese Journal of Rock Mechanics and Engineering,2016,35(3):570-578.
[4]NabasséJ F,Koupouli,Tikou Belem,et al.Direct shear tests on cemented paste backfill-rock wall and cemented paste backfill-backfill interfaces[J].Journal of Rock Mechanics and Geotechnical Engineering,2016,8(4):472-479.
[5]Jian Ouyang,Hongyan Li,Baoguo Han.The rheological properties and mechanisms of cement asphalt emulsion paste with different charge types of emulsion[J].Construction and Building Materials,2017,147:566-575.
[6]GB/T 14976—2012流体输送用不锈钢无缝钢管[S].北京:中国标准出版社,2012.GB/T 14976—2012 Seamless Stainless Steel Pipes for Fluid Transport[S].Beijing:Standards Press of China,2012.
[7]刘超,王洪江,吴爱祥,等.铜钼矿细粒全尾膏体浓度范围确定[J].岩石力学与工程学报,2015,34(S1):3432-3438.Liu Chao,Wang Hongjiang,Wu Aixiang,et al.Determination of concentration range of fine unclassified tailings paste in copper-molybdenum mine[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(S1):3432-3438.
[8]崔增娣,孙恒虎.煤矸石凝石似膏体充填材料的制备及其性能[J].煤炭学报,2010,35(6):896-899.Cui Zengdi,Sun Henghu.The preparation and properties of coal gangue based sialite paste-like backfill material[J].Journal of China Coal Society,2010,35(6):896-899.
[9]Angels Aragonès,Oriol Guasch.Conditions for transmission path analysis in energy distribution models[J].Mechanical Systems and Signal Processing,2016,12:68-69.