工程科学学报，第38卷，第5期：595601,2016年5月 Chinese Journal of Engineering,Vol.38,No.5:595-601,May 2016 D0l:10.13374/j.issn2095-9389.2016.05.001:http://journals.ustb.edu.cn 泵送剂对膏体抗压强度的影响试验研究及机理分析 李公成2》，王洪江12》，吴爱祥2》，杨鹏》 1)北京科技大学土木与环境工程学院，北京100083 2)北京科技大学金属矿山高效开采与安全教有部重点实验室，北京100083 3)中色非洲矿业有限公司，基特韦22592，赞比亚 ☒通信作者，E-mail:wanghj1988@126.com 摘要泵送剂能有效改善膏体料浆流动性能，然而其对膏体料浆凝结性能的影响机理尚未明确。针对这一问题，本文进行 泵送剂的抗压强度试验和环境扫描电镜观察.强度试验结果表明：泵送剂可有效改善膏体料浆凝结性能，泵送剂掺量越高不 同龄期的膏体凝结性越好.环境扫描电镜观察结果表明：泵送剂添加后，大尺寸絮团减少，料浆内孔隙减少，改变了膏体微观 结构.基于应用计算机图像处理技术和分形理论，计算膏体微观结构计盒维数，量化分析膏体微观结构.最终对泵送剂改善 膏体凝结性能的机理进行分析，认为泵送剂通过改变絮团大小和数量、孔隙率、水化反应等方面影响膏体凝结性能. 关键词膏体：药剂：凝结性；微观结构：分形维数 分类号TD853 Experimental study and mechanism analysis on the effect of pumping agents on the compressive strength of paste slurries LI Gong-cheng,WANG Hongjiang,WU Ai-xiang,YANG Peng 1)School of Civil and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China 2)Key Laboratory of the Ministryof Education for High Efficient Mining and Safety of Metal Mines,University of Science and Technology Beijing,Beijing 100083,China 3)Africa Mining Public Limited Company,China Nonferrous Metals Co.,Lid.,Kitwe 22592,Zambia Corresponding author,E-mail:wanghj1988@126.com ABSTRACT Pumping agents can improve the fluidity of paste slurries.However,the effecting mechanism of pumping agents on the coagulability of paste slurries is not made clear.To solve this problem,a pumping agent was added for compression strength tests and environmental scanning electron microscopy (ESEM)observations.Compression strength test results indicate that the pumping agent can improve the coagulability of paste slurries,and the more the pumping agent amount,the better the coagulability of paste slurries. ESEM observation results show that large size floccules and pores decrease after adding the pumping agent,and the paste's micro- structure is changed.The fractal dimensions of the paste's microstructure images were calculated based on the image processing tech- nology and fractal theory,and the structure was quantitatively analyzed.The mechanism of improving the coagulability of paste slurries was discussed.It is found that the coagulability of paste slurries is affected by changing the size and number of flocculants,the porosi- ty and the hydration reaction. KEY WORDS pastes;agents:coagulability:microstructure;fractal dimension 收稿日期：2015-10-26 基金项目：国家自然科学基金项目资助项目(51374034)：国家“十二五”科技支撑计划资助项目(2012BAB08B02):国家自然科学基金资助项 目(51304011)工程科学学报，第 38 卷，第 5 期: 595--601，2016 年 5 月 Chinese Journal of Engineering，Vol． 38，No． 5: 595--601，May 2016 DOI: 10． 13374 /j． issn2095--9389． 2016． 05． 001; http: / /journals． ustb． edu． cn 泵送剂对膏体抗压强度的影响试验研究及机理分析 李公成1，2) ，王洪江1，2) ，吴爱祥1，2) ，杨 鹏3) 1) 北京科技大学土木与环境工程学院，北京 100083 2) 北京科技大学金属矿山高效开采与安全教育部重点实验室，北京 100083 3) 中色非洲矿业有限公司，基特韦 22592，赞比亚  通信作者，E-mail: wanghj1988@ 126． com 摘 要 泵送剂能有效改善膏体料浆流动性能，然而其对膏体料浆凝结性能的影响机理尚未明确． 针对这一问题，本文进行 泵送剂的抗压强度试验和环境扫描电镜观察． 强度试验结果表明: 泵送剂可有效改善膏体料浆凝结性能，泵送剂掺量越高不 同龄期的膏体凝结性越好． 环境扫描电镜观察结果表明: 泵送剂添加后，大尺寸絮团减少，料浆内孔隙减少，改变了膏体微观 结构． 基于应用计算机图像处理技术和分形理论，计算膏体微观结构计盒维数，量化分析膏体微观结构． 最终对泵送剂改善 膏体凝结性能的机理进行分析，认为泵送剂通过改变絮团大小和数量、孔隙率、水化反应等方面影响膏体凝结性能． 关键词 膏体; 药剂; 凝结性; 微观结构; 分形维数 分类号 TD853 收稿日期: 2015--10--26 基金项目: 国家自然科学基金项目资助项目( 51374034) ; 国家“十二五”科技支撑计划资助项目( 2012BAB08B02) ; 国家自然科学基金资助项 目( 51304011) Experimental study and mechanism analysis on the effect of pumping agents on the compressive strength of paste slurries LI Gong-cheng1，2) ，WANG Hong-jiang1，2)  ，WU Ai-xiang1，2) ，YANG Peng3) 1) School of Civil and Environmental Engineering，University of Science and Technology Beijing，Beijing 100083，China 2) Key Laboratory of the Ministryof Education for High Efficient Mining and Safety of Metal Mines，University of Science and Technology Beijing，Beijing 100083，China 3) Africa Mining Public Limited Company，China Nonferrous Metals Co． ，Ltd． ，Kitwe 22592，Zambia  Corresponding author，E-mail: wanghj1988@ 126． com ABSTＲACT Pumping agents can improve the fluidity of paste slurries． However，the effecting mechanism of pumping agents on the coagulability of paste slurries is not made clear． To solve this problem，a pumping agent was added for compression strength tests and environmental scanning electron microscopy ( ESEM) observations． Compression strength test results indicate that the pumping agent can improve the coagulability of paste slurries，and the more the pumping agent amount，the better the coagulability of paste slurries． ESEM observation results show that large size floccules and pores decrease after adding the pumping agent，and the paste’s micro￾structure is changed． The fractal dimensions of the paste’s microstructure images were calculated based on the image processing tech￾nology and fractal theory，and the structure was quantitatively analyzed． The mechanism of improving the coagulability of paste slurries was discussed． It is found that the coagulability of paste slurries is affected by changing the size and number of flocculants，the porosi￾ty and the hydration reaction． KEY WOＲDS pastes; agents; coagulability; microstructure; fractal dimension