改性粉煤灰材料固沙特性试验研究

doi:10.13722/j.cnki.jrme.2023.0966

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (2431 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要粉煤灰是火力发电的主要废弃物，在中国西部地区广泛存在，受交通影响，处置成本高，西部宁夏甘肃地区沙漠化问题严重，基于两者供需关系开展粉煤灰改性材料固沙应用研究。基于固沙效果制定参考固沙标准，针对改性粉煤灰固沙材料，通过单轴抗压强度试验、含水率试验、扫描电镜试验(SEM)、X射线衍射试验(XRD)、剪切试验等多种分析方法对改性粉煤灰材料的力学性质、水化产物和微观结构进行研究。结果表明，改性粉煤灰材料单轴抗压强度和胶结效果均得到显著提高，改性粉煤灰材料水化后形成的水化硅酸钙凝胶是解释保水性差异的关键；10%碱激发剂改性粉煤灰胶结体黏聚力提升为原来的3倍以上，30%镁渣改性粉煤灰胶结体抗剪强度显著提高。建议采用低剂量碱激发剂(2.5%左右)或高剂量(＞30%)镁渣改性粉煤灰，并适当提高灰沙比，以获得更好的经济效益和固沙效果。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	卢海峰1
	2
	李中洋1
	张凯1

关键词 ：土力学, 粉煤灰, 镁渣, 固沙特性, X射线衍射, 扫描电镜

Abstract：Fly ash is a byproduct of thermal power generation that requires proper disposal. While it is abundant in western China，transportation and disposal costs can be significant. Furthermore，the regions of western Ningxia and Gansu are facing a severe desertification problem. This research aims to explore the potential of fly ash modified materials for sand fixation，while considering the balance between supply and demand. To develop reference and fixation standards based on the effect of sand fixation，the mechanical properties，hydration products，and microstructure of modified fly ash sand fixation materials were studied through various analytical methods，including uniaxial compressive strength test，water content test，scanning electron microscope test (SEM)，X-ray diffraction test(XRD)，and shear test. The results suggest a noteworthy enhancement in the uniaxial compressive strength and cementation effect of the modified fly ash materials. The hydrated calcium silicate gel formed after the hydration of the modified fly ash materials appears to be the key factor in explaining the difference in water retention. Additionally，the cohesive force of the 10% alkali exciter-modified fly ash cement increased to more than three times the original，and the shear strength of the 30% magnesium slag-modified fly ash cement was significantly improved. The article suggests considering the use of a low-dose alkali exciter，approximately 2.5%，or a high-dose magnesium slag modified fly ash，greater than 30%，while adjusting the ash-to-sand ratio accordingly to optimize both economic benefits and sand fixation effects.

Key words： soil mechanics fly ash magnesium slag sand fixation properties X-ray diffraction scanning electron microscope

引用本文:

卢海峰1，2，李中洋1，张凯1. 改性粉煤灰材料固沙特性试验研究[J]. 岩石力学与工程学报, 2024, 43(S1): 3374-3384.
LU Haifeng1，2，LI Zhongyang1，ZHANG Kai1. Experimental study on sand fixation characteristics of modified fly ash materials. , 2024, 43(S1): 3374-3384.

链接本文:

http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2023.0966 或 http://rockmech.whrsm.ac.cn/CN/Y2024/V43/IS1/3374

[16]	PORBAHA A，PRADHAN T B，KISHIDA T. Static response of fly ash columnar improved ground[J]. Canadian Geotechnical Journal，38(2)：276-286.
[22]	唐洋洋，李林波，王超，等. 镁渣资源化利用新进展[J]. 现代化工，2020，40(12)：63-67.(TANG Yangyang，LI Linbo，WANG Chao，et al. New progress in resource utilization of magnesium slag[J]. Modern Chemical Industry，2020，40(12)：63-67.(in Chinese))
[1]	HEMALATHA T，RAMASWAMY A. A review on fly ash characteristics-Towards promoting high volume utilization in developing sustainable concrete. Journal of Cleaner Production[J]. Journal of Cleaner Production，2017，147：546-559.
[3]	TIAN Y，WANG L P，Y ANG B，et al. Comparative evaluation of energy and resource consumption for vacuum carbothermal reduction and Pidgeon process used in magnesium production[J]. Journal of Magnesium and Alloys，2022，10(3)：697-706.
[5]	WANG X，SONG J L，XIAO Z Q，et al. Desertification in the Mu Us Sandy Land in China：Response to climate change and human activity from 2000 to 2020[J]. Geography and Sustainability，2022，3(2)：177-189.
[6]	刘传义. 林永昌提出粉煤灰固沙设想[J]. 粉煤灰综合利用，1992，(4)：29.(LIU Chuanyi. The idea of sand fixation by fly ash proposed by Y. C. Lin[J]. Comprehensive Utilization of Fly Ash，1992，(4)：29.(in Chinese))
[9]	周乃武. 利用工业固体废物制备高强度土壤固化剂的试验研究[硕士学位论文][D]. 北京：中国地质大学(北京)，2006.(ZHOU Naiwu. Experimental study on the preparation of high-strength soil curing agent using industrial solid waste[M. S. Thesis][D]. Beijing：China University of Geosciences(Beijing)，2006.(in Chinese))
[11]	曲烈，乐俐，杨久俊，等. 水泥-粉煤灰基植生固沙材料的正交优化和氮、磷、钾初期释放速率研究[J]. 水土保持研究，2010，17(3)：148-152.(QU Lie，LE Li，YANG Jiujun，et al. Orthogonal optimization and initial release rate of nitrogen，phosphorus and potassium from cement and fly ash based plantation sand fixation materials[J]. Soil and Water Conservation Research，2010，17(3)：148-152.(in Chinese))
[13]	叶陈雷，田凯悦. 粉煤灰改良沙漠土壤的风洞试验研究[C]// 北京力学会第二十三届学术年会论文集. 北京：[s. n.]，2017：806-807.(YE Chenlei，TIAN Kaiyue. Wind tunnel experimental study on the improvement of desert soil by fly ash[C]// Proceedings of the Twenty-third Annual Academic Conference of the Beijing Mechanics Society. Beijing：[s. n.]，2017：806-807.(in Chinese))
[15]	陈艺文. 不同物理材料配施组合对风沙土理化与重金属特征的影响[硕士学位论文][D]. 泰安：山东农业大学，2021.(CHEN Yiwen. Effects of different combinations of physical materials on physicochemical and heavy metal characteristics of wind-sand soil[M. S. Thesis][D]. Tai?an：Shandong Agricultural University，2021.(in Chinese))
[19]	BRYSON L S，MAHMOODABADI M，ADU-GYAMFI K. Prediction of consolidation and shear behavior of fly ash-soil mixtures using mixture Theory[J]. Journal of Materials in Civil Engineering，2017，29(11)：04017222.
[20]	DEHGHANBANADAKI A，AREFNIA A，KESHTKARBAN- AEEMOGHADAM A，et al. Evaluating the compression index of fibrous peat treated with different binders[J]. Bulletin of Engineering Geology and the Environment，2017，76(2)：575-586.
[24]	TAN Y S，YU H F，YANG D Y. Basic magnesium sulfate cement： Autogenous shrinkage evolution and mechanism under various chemical admixtures[J]. Cement and Concrete Composites，2022，(prepublish)：104412.
[25]	XUE H J，SHEN X D，LIU Q，et al. Analysis of the damage to the aeolian sand concrete surfaces caused by wind-sand erosion[J]. Journal of Advanced Concrete Technology，2017，15(12)：724-737.
[7]	王文安，陈士纯，郭薇，等. 适用于西部大开发中各种工程需要的短纤维增强增韧复合材料基本性能研究[J]. 混凝土与水泥制品，2000，(增1)：42-44.(WANG Wen?an，CHEN Shichun，GUO Wei，et al. Study on the basic properties of short fiber reinforced toughened composites suitable for various engineering needs in western development[J]. Concrete and Cement Products，2000，(Supp.1)：42-44.(in Chinese))
[17]	KO?ODZIEJCZYK U，?WI?KA?A M，WIDUCH A. Use of fly-ash for the production of hydraulic binding agents and for soil stabilization[J]. Gospodarka Surowcami Mineralnymi-mineral Resources Management，2012，28(4)：15-28.
[26]	刘洪光，何新林，王振华，等. 准噶尔盆地南缘初春沙漠含水率、沙漠冻土及植被覆盖率研究[J]. 水资源与水工程学报，2009，20(3)：51-53.(LIU Hongguang，HE Xinlin，WANG Zhenhua，et al. Study on water content，desert permafrost and vegetation cover in the desert of the southern margin of Junggar Basin in early spring[J]. Journal of Water Resources and Water Engineering，2009，20(3)：51-53.(in Chinese))
[28]	张健乐，史东梅，刘义，等. 土壤容重和含水率对紫色土坡耕地耕层抗剪强度的影响[J]. 水土保持学报，2020，34(3)：162- 167.(ZHANG Jianle，SHI Dongmei，LIU Yi，et al. Effects of soil bulk weight and water content on the shear strength of tillage layer on purple soil slope[J]. Journal of Soil and Water Conservation，2020，34(3)：162-167.(in Chinese))
[30]	侯玉虹，尹光华，刘作新，等. 土壤底墒与苗期灌溉量对玉米出苗和苗期生长发育的影响[J]. 干旱地区农业研究，2006，(4)：51-57.(HOU Yuhong，YIN Guanghua，LIU Zuoxin. Effects of soil moisture and seedling irrigation on seedling emergence and seedling development of maize[J]. Arid Zone Agricultural Research，2006，(4)：51-57.(in Chinese))
[32]	JEONG I M，JEONG R N，HAN W S，et al. Analyzing growth reactions of herbaceous plants for irrigation management[J]. ?????????，2020，23(3)：255-265.
[34]	CHALERMPHAN N，SUTHEE W，DARUNEE W. Effect of magnesium sulfate on properties of low calcium fly ash based-geopolymer-treated hemp shiv bio-concrete[J]. Construction and Building Materials，2023，392：131714.
[35]	RAKI? JELENA M，PETROVI? RADA D，RADOJEVI? VESNA J，et al. Effects of selected inorganic chemical activators on properties and hydration mechanism of high volume fly ash(HVFA) binders[J]. Construction and Building Materials，2023，391： 131833.
[4]	RUAN S S，LIU L，SHAO C C，et al. Study on the source of activity and differences between modified and unmodified magnesium slag as a filling cementitious materials[J]. Construction and Building Materials，2023，392：132019.
[14]	何晶. 碱矿渣粉固化剂及其对沙漠土的固化特性研究[硕士学位论文][D]. 乌鲁木齐：新疆农业大学，2017.(HE Jing. Research on alkali slag powder curing agent and its curing characteristics on desert soil[M. S. Thesis][D]. Urumqi：Xinjiang Agricultural University，2017.(in Chinese))
[23]	ZHANG P，GAO Z，WANG J，et al. Properties of fresh and hardened fly ash/slag based geopolymer concrete：A review[J]. Journal of Cleaner Production，2020，270(prepublish)：122389.
[33]	HEMALATHA T，RAMASWAMY A. A review on fly ash characteristics-Towards promoting high volume utilization in developing sustainable concrete[J]. Journal of Cleaner Production，2017，147：546-559.
[2]	BHATT A，PRIYADARSHINI S，ACHARATH MOHANAKRISHNAN A，et al. Physical，chemical and geotechnical properties of coal fly ash：A global review[J]. Case Studies in Construction Materials，2019，11：e00263.
[12]	杨凯，唐泽军，赵智，等. 粉煤灰和聚丙烯酰胺固沙效果的风洞试验[J]. 农业工程学报，2012，28(4)：54-59.(YANG Kai，TANG Zejun，ZHAO Zhi，et al. Wind tunnel tests on sand consolidation by fly ash and polyacrylamide[J]. Journal of Agricultural Engineering，2012，28(4)，54-59.(in Chinese))
[21]	KARIM M A，SAMI H A，KAPLAN A. Optimization of soil to fly-ash mix ratio for enhanced engineering properties of clayey sand for subgrade use[J]. Applied Sciences，2020，10(20)：7 038.
[31]	张现慧，钟悦鸣，谭天逸，等. 土壤水分动态对胡杨幼苗生长分配策略的影响[J]. 北京林业大学学报，2016，38(5)：92-99.(ZHANG Xianhui，ZHONG Yueming，TAN Tianyi，et al. Effects of soil moisture dynamics on growth allocation strategies of poplar seedlings[J]. Journal of Beijing Forestry University，2016，38(5)：92-99.(in Chinese))
[10]	纪蓓，薛彦辉. 粉煤灰/膨润土-聚丙烯酸盐聚合化学固沙材料的研究[J]. 环境科学与管理，2009，34(2)：83-86.(JI Bei，XUE Yanhui. Fly ash/bentonite-polyacrylate polymerization for chemical sand fixation[J]. Environmental Science and Management，2009，34(2)：83-86.(in Chinese))
[29]	傅胤榕，仉文岗. 土体含水率与根系埋深对银杏树苗抗拉拔性能的影响[J]. 土木与环境工程学报：中英文，2019，41(5)：42-48.(FU Yinrong，ZHANG Wengang. Effects of soil water content and root burial depth on tensile and pullout resistance of Ginkgo biloba seedlings[J]. Journal of Civil and Environmental Engineering：in English and Chinese，2019，41(5)：42-48.(in Chinese))
[8]	孙宏义，李芳，杨新民，等. 保水剂处理土壤的抗风蚀性能研究[J]. 中国沙漠，2005，25(4)：618-622.(SUN Hongyi，LI Fang，YANG Xinmin，et al. Study on wind erosion resistance of soil treated with water retaining agent[J]. Desert China，2005，25(4)：618-622.(in Chinese))
[18]	YOON W，SHIN S，CHAE Y. A Study on characteristics of self-weight consolidation of bottom ash mixed soil[J]. Journal of Korean Geosynthetics Society，2015，14(4)：59-77.
[27]	陈银萍，曹雯婕，余沛东，等. 土壤含水率对风沙流结构及风蚀量的影响[J]. 中国沙漠，2021，41(2)：173-180.(CHEN Yinping，CAO Wenjie，YU Peidong，et al. Influence of soil water content on the structure of wind-sand flow and the amount of wind erosion[J]. Desert China，2021，41(2)：173-180.(in Chinese))