粉煤灰–水泥基膏体微观结构分形表征及动力学特征

doi:10.13722/j.cnki.jrme.2015.1607

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摘要粉煤灰在促进膏体料浆物相发育及强度增长方面缺乏微观量化指标。通过电镜扫描和能谱分析实验，同时结合分形理论和反应动力学对膏体微观结构进行分析。结果表明：粉煤灰与水泥水化产物结合有利于促进膨胀相钙矾石的生成。在一定范围内，粉煤灰增加，钙矾石相增多，微观结构密实，强度随计盒维数先大幅增长后趋于稳定。当粉煤灰中钙含量过高时，钙矾石过量生成，盒维数表现为先增大后减小，宏观上则表现出强度劣化现象。建立的粉煤灰膏体水化动力学模型将水化过程划分为溶解期、浸润期和凝结硬化期，将凝胶颗粒的发育分解为晶体核化和晶体生长两个过程，并据此求出了凝胶晶体速率增长公式。

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	程海勇
	吴爱祥
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	王少勇

关键词 ：采矿工程, 膏体充填, 粉煤灰, 分形维数, 水化反应, 微观结构

Abstract：There are not many indicators to quantify the effect of fly ash on promoting the development of objects and enhancing strength in paste in micro scale. Based on SEM and energy spectrum analysis experiment，paste micro structure research is conducted with the help of Fractal Theory and Reaction kinetics. Results show that combination of fly ash and cement hydrated products are beneficial to promote the produce of Ettringite of expansion phase. In a certain range，with the increasing input of fly ash，the production of Ettringite phase increase correspondingly，and the micro structure of paste is more and more compact. As the Box-counting Dimension increasing，the strength of paste increase dramatically at the beginning and remain stable at last. If the fly ash contains too much calcium，the production amount of Ettringite will be excessively and the Box-counting Dimension increase and then decrease，which acts as strength deterioration in macroscopic view. The established fly ash paste hydration reaction model divides its process into dissolution period，soakage period and setting and hardening period. Based on the two courses(named crystal nucleation and crystal growth)，into which the develop procedure of gel particles are analyzed，the formula of cementing crystal growth rate is obtained.

Key words： mining engineering paste backfilling fly ash fractal dimension hydration reaction microstructure

引用本文:

程海勇，吴爱祥，王贻明，王洪江，王少勇. 粉煤灰–水泥基膏体微观结构分形表征及动力学特征[J]. 岩石力学与工程学报, 2016, 35(S2): 4241-4248.
CHENG Haiyong，WU Aixiang，WANG Yiming，WANG Hongjiang，WANG Shaoyong. Fractal features and dynamical characters of the microstructure of paste backfill prepared from fly ash based binder. , 2016, 35(S2): 4241-4248.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2015.1607 或 https://rockmech.whrsm.ac.cn/CN/Y2016/V35/IS2/4241

[1]	古德生，周科平. 现代金属矿业的发展主题[J]. 金属矿山，2012，41(7)：1-8.(GU Desheng，ZHOU Keping. Development theme of the modern metal mining[J]. Mental Mine，2012，41(7)：1-8.(in Chinese))
[2]	LEE N K，LEE H K. Reactivity and reaction products of alkali-activated，fly ash/slag paste[J]. Construction and Building Materials，2015，81：303-312.
[3]	吴爱祥，程海勇，王贻明，等. 考虑管壁滑移效应膏体管道的输送阻力特性[J]. 中国有色金属学报，2016，26(1)：180-187.(WU Aixiang，CHENG Haiyong，WANG Yiming，et al. Transport resistance characteristic of paste pipeline considering effect of wall slip[J]. The Chinese Journal of Nonferrous Metals，2016，26(1)：180-187.(in Chinese))
[4]	王洪江，李辉，吴爱祥，等. 基于全尾砂级配的膏体新定义[J]. 中南大学学报：自然科学版，2014，45(2)：557-562.(WANG Hongjiang，LI Hui，WU Aixiang，et al. New paste definition based on grading of full taillings[J]. Journal of Central South University：Science and Technology，2014，45(2)：557-562. (in Chinese))
[5]	杨志强，高谦，王永前，等. 金川全尾砂-棒磨砂混合充填料胶砂强度与料浆流变特性研究[J]. 岩石力学与工程学报，2014，33(增2)：3985-3991.(YANG Zhiqiang，GAO Qian，WANG Yongqian，et al. Research on filling body strength and rheological properties of mixed filling mortar with unclassified tailings and rod milling sand in Jinchuan mine[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(Supp.2)：3985-3991.(in Chinese))
[6]	HU CL. Microstructure and mechanical properties of fly ash blended cement pastes[J]. Construction and Building Materials，2014，73：618-625.
[7]	FILLENWARTH B A，SASTRY S M. Development of a predictive optimization model for the compressive strength of sodium activated fly ash based geopolymer pastes[J]. Fuel，2015，147：141-146.
[8]	钱觉时. 粉煤灰特性与粉煤灰混凝土[M]. 北京：科学出版社，2002：15-25.(QIAN Jueshi. Characteristics of fly ash and fly ash concrete[M]. Beijing：Science Press，2002：15-25.(in Chinese))
[9]	杜明泽，康天合，尹博，等. 粉煤灰充填材料早龄期物理力学特性及其水化过程分析[J]. 岩石力学与工程学报，2016，35(4)：826-836.(DU Mingze，KANG Tianhe，YIN Bo，et al. Study on early age physical and mechanical properties of fly ash filling material and its hydration process[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(4)：826-836.(in Chinese))
[10]	陈琳，潘如意，沈晓冬，等. 粉煤灰-矿渣-水泥复合胶凝材料强度和水化性能[J]. 建筑材料学报，2010，13(3)：380-384.(CHEN Lin，PAN Ruyi，SHEN Xiaodong，et al. Strength and hydration property of fly ash-slag-cement composite cementitious material[J]. Journal of Building Materials，2010，13(3)：380-384.(in Chinese))
[11]	戚庭野，冯国瑞，郭育霞，等. 煤矿膏体充填材料性能随龄期变化的试验研究[J]. 采矿与安全工程学报，2015，32(1)：42-48.(QI Tingye，FENG Guorui，GUO Yuxia，et al. Experimental study on the changes of coal paste backfilling material performance during hydrationprocess[J]. Journal of Mining andSafety Engineering，2015，32(1)：42-48.(in Chinese))
[12]	赵明华，戴杰，张玲，等. 基于分形理论的粉煤灰渗透率研究[J]. 湖南大学学报：自然科学版，2015，42(1)：75-80.(ZHAO Minghua，DAI Jie，ZHANG Ling，et al. Fractal theory-based study of the permeability of fly ash[J]. Journal of Hunan University：Natural Science，2015，42(1)：75-80.(in Chinese))
[13]	胡家国. 电厂粉煤灰矿山充填胶凝机理研究及水化反应动力学特性[博士学位论文][D].长沙：中南大学，2004.(HU Jiaguo. Investigations onthe cementing mechanism of fly-ashfrompower plants and its hydration reaction kineticsperformance in minefilling[Ph. D. Thesis][D].Changsha：Cential South University，2004.(in Chinese))
[14]	刘超，韩斌，孙伟，等. 高寒地区废石破碎胶结充填体强度特性试验研究与工业应用[J].岩石力学与工程学报，2015，34(1)：139-147.(LIU Chao，HAN Bin，SUN Wei，et al.Experimental study of strength of backfillings of cemented rock debris and its application under low temperature condition[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(1)：139-147.(in Chinese))
[15]	DURDZI?SKI P T，DUNANT C F，HAHA M B，et al. A new quantification method based on SEM-EDS to assess fly ash composition and study the reaction of its individual components in hydrating cement paste[J]. Cement and Concrete Research，2015，73：111-122.
[16]	彭瑞东，谢和平，鞠杨. 二维数字图像分形维数的计算方法[J].中国矿业大学学报，2004，33(1)：19-24.(PENG Ruidong，XIE Heping，JU Yang. Computation method of fractal dimension for 2d digital image[J]. Journal of China University of Mining andTechnology，2004，33(1)：19-24.(in Chinese))
[17]	朱华，姬翠翠. 分形理论及其应用[M]. 北京：科学出版社，2011：5-13.(ZHU Hua，JI Cuicui. Fractal theory and its applications[M]. Beijing：Science Press，2011：5-13.(in Chinese))
[18]	汪澜. 水泥混凝土——组成·性能·应用[M]. 北京：中国建材工业出版社，2004：30-35.(WANG Lan. Composition，performance and application of Cement concrete[M]. Beijing：China building industry press，2004：30-35.(in Chinese))
[19]	HANJITSUWAN S，HUNPRATUB S，THONGBAI P，et al. Effects of NaOH concentrations on physical and electrical properties of high calcium fly ash geopolymer paste[J]. Cement and Concrete Composites，2014，45：9-14.
[20]	何龙庆，林继成，石冰. 菲克定律与扩散的热力学理论[J].安庆师范学院学报：自然科学版，2006，12(4)：38-39.(HE Longqing，LIN Jicheng，SHI Bing.Fick Lawand the diffusion's thermodynamicstheory[J]. Journal of Anqing Teachers College：Natural Science，2006，12(4)：38-39.(in Chinese))
[21]	黄勇，周志芳，高正夏.基于水化学动力学方法的水文地质参数确定[J].岩石力学与工程学报，2007，26(增1)：2988-2991.(HUANG Yong，ZHOU Zhifang，GAO Zhengxia. Determination of hydrogeological parameters based on hydrochemical kinetics method[J].Chinese Journal of Rock Mechanics and Engineering，2007，26(Supp.1)：2988-2991.(in Chinese))