摘要The contents of soluble salts, including chloride and sulfate, were tested to use municipal solid-waste incinerator bottom ash (IBA) in cement-stabilized materials for roadbase. In addition, the effects of soluble salts on the strength properties of cement stabilized IBA and crushed stone mixture were analyzed by applying unconfined compressive and splitting strength tests, respectively. Moreover, the deformation properties of the mixture were analyzed by applying dry and temperature shrink tests, respectively. In addition, the microscopic mechanism of chloride and sulfate on the mixture was analyzed by using micro-test methods. Results show that the average contents of chloride and sulfate in IBA are 0.57% and 1.01%, respectively. The strength of the mixture that contains 30% IBA greatly decreases when the contents of chloride and sulfate in IBA are higher than 1.67% and 2.00%, respectively. The dry and temperature shrinkage deformations of the mixture greatly increase when the contents of chloride and sulfate are higher than 0.67% and 1.00%, respectively. Water treatment reduces the soluble salt content of IBA. Unlike the control mixture, the strength properties of the mixture that contained IBA with water treatment shows no remarkable difference, whereas the short and temperature shrinkage deformations increase and decrease, respectively. Microscopic analysis shows that Cl- reacts with cement hydration products to produce Friedel salts, and the amount of hydration products increases in the mixture due to the addition of chloride and sulfate. However, some cement particles are not hydrated when the Na2SO4 content is 1.0%. The content of soluble salts in IBA should be limited to ensure the performance of the mixture.
Abstract:The contents of soluble salts, including chloride and sulfate, were tested to use municipal solid-waste incinerator bottom ash (IBA) in cement-stabilized materials for roadbase. In addition, the effects of soluble salts on the strength properties of cement stabilized IBA and crushed stone mixture were analyzed by applying unconfined compressive and splitting strength tests, respectively. Moreover, the deformation properties of the mixture were analyzed by applying dry and temperature shrink tests, respectively. In addition, the microscopic mechanism of chloride and sulfate on the mixture was analyzed by using micro-test methods. Results show that the average contents of chloride and sulfate in IBA are 0.57% and 1.01%, respectively. The strength of the mixture that contains 30% IBA greatly decreases when the contents of chloride and sulfate in IBA are higher than 1.67% and 2.00%, respectively. The dry and temperature shrinkage deformations of the mixture greatly increase when the contents of chloride and sulfate are higher than 0.67% and 1.00%, respectively. Water treatment reduces the soluble salt content of IBA. Unlike the control mixture, the strength properties of the mixture that contained IBA with water treatment shows no remarkable difference, whereas the short and temperature shrinkage deformations increase and decrease, respectively. Microscopic analysis shows that Cl- reacts with cement hydration products to produce Friedel salts, and the amount of hydration products increases in the mixture due to the addition of chloride and sulfate. However, some cement particles are not hydrated when the Na2SO4 content is 1.0%. The content of soluble salts in IBA should be limited to ensure the performance of the mixture.
基金资助:Supported by the Transportation Science and Technology Project of Jiangxi Province (Nos. 2017H0009, 2018Z0002, 2015C0023), the Science and Technology Platform Construction Project of Jiangxi Province (No. 20171BCD40017)
通讯作者:
LIU Dong
E-mail: zbyikun@163.com
引用本文:
刘栋, 尚小亮, 杨西海. 垃圾焚烧炉渣中可溶盐对水泥稳定材料性能的影响[J]. Journal of Highway and Transportation Research and Development, 2018, 12(4): 18-24.
LIU Dong, SHANG Xiao-liang, YANG Xi-hai. Soluble Salt in Municipal Solid-waste Incinerator Bottom Ash and Its Effect on the Performance of Cement-stabilized Materials. Journal of Highway and Transportation Research and Development, 2018, 12(4): 18-24.
[1] ZHANG D Q, TAN S K, Gersberg R M. Municipal Solid Waste Management in China:Status, Problems and Challenges[J]. Journal of Environmental Management,2010, 91(8):1623-1633.
[2] HE Pin-jing, SONG Li-qun, ZHANG Hua, et al. Characterization of Waste Bottom Ash and its Beneficial Use Prospect[J]. China Environmental Science,2003,23(4):395-398.(in Chinese)
[3] GENG Cui-jie, CHEN De-zhen, SHI Hui-sheng. Evaluation Index System for Assessing Environmental Impacts Associated with Road Construction with Recycled Waste Materials[J]. Journal of Highway and Transportation Research and Development,2011,28(11):39-42.(in Chinese)
[4] LIU Dong, LI Li-han, CUI Hua-jie. Experimental Study on Influence of Municipal Solid Waste Incineration Bottom Ash Aggregate on Properties of Asphalt Mixture[J]. Journal of Building Materials,2015,18(2):307-311. (in Chinese)
[5] LIU Dong, LI Li-han, CUI Hua-jie. Pavement Performance of Cement Stabilized Municipal Solid Waste Incineration Bottom Ash Aggregate and Crushed Stones[J]. Journal of Tongji University:Natural Science,2015,43(3):405-409. (in Chinese)
[6] CHIMENOS J M, FERNáNDEZ A I, NADAL R, et al. Short-term Natural Weathering of MSWI Bottom Ash[J]. Journal of Hazardous Materials, 2000,79(3):287-299.
[7] LI Xiao-dong, YANG Zhong-can, LU Sheng-yong, et al. Study of Determination Methods for Chlorine Content in Municipal Solid Waste (MSW)[J]. Journal of Chemistry and Technology, 2002,30(6):563-568. (in Chinese)
[8] THOMAS A. Pretreatment and Utilization of Waste Incineration Bottom Ashes:Danish Experiences[J]. Waste Management, 2007, 27(10):1452-1457.
[9] VEGAS I, IBAÑEZ J A, SAN JOSé J T, et al. Construction Demolition Wastes, Waelz Slag and MSWI Bottom Ash:a Comparative Technical Analysis as Material for Road Construction[J]. Waste Management, 2008, 28(3):565-574.
[10] SUN Lu-shi, LI Min, XIANG Jun, et al. Characteristics of the Ash Deposits from Incinerated Municipal Solid Waste[J]. Journal of Huazhong University of Science & Technology (Natural Science Edition), 2009(8):77-79. (in Chinese)
[11] JI Hui, YANG Quan-bing. Deterioration of Concrete Exposed to Salt Environment[J]. Journal of Highway and Transportation Research and Development,2011,28(11):39-42. (in Chinese)
[12] BAYUSENO A P, SCHMAHL W. Understanding the Chemical and Mineralogical Properties of Inorganic Portion of MSWI Bottom Ash[J]. Waste Management, 2010, 30(8):1509-1520.
[13] BAO Long-sheng. The Study of the Fly-Ash-Flushed-by-Seawater is Used in the Road Subbase Course[D]. Xi'an:Chang'an University, 2008. (in Chinese)
[14] MA Dong-mei. Microstructural Analysis of Influence of Soluble Ions on Strength of Cemented Soil[J]. Journal of Highway and Transportation Research and Development, 2008,25(4):16-21. (in Chinese)
[15] JTG/T F20-2015, Technical Guidelines for Construction of Highway Roadbases[S]. (in Chinese)
[16] JELENA T. Pre-treatment of Municipal Solid Waste Incineration (MSWI) Bottom Ash for Utilisation in Road Construction[D]. Luleå:Luleå University of Technology, 2006.
[17] KIM S Y, MATSUTO T, TANAKA N. Evaluation of Pre-treatment Methods for Landfill Disposal of Residues from Municipal Solid Waste Incineration[J]. Waste Management & Research, 2003, 21(5):416-423.
[18] SHEN Ai-qin. Cement and Concrete[M]. Beijing:People's Communication Press. 2000. (in Chinese)
[1]
李宁, 马骉, 李瑞, 司伟. 基于PUMA的单级和多级加载模式下级配碎石性能研究[J]. Journal of Highway and Transportation Research and Development, 2019, 13(2): 1-12.
[2]
许海亮, 任合欢, 何兆才, 何炼. 车路耦合条件下沥青混凝土路面变形特性时域分析[J]. Journal of Highway and Transportation Research and Development, 2019, 13(2): 13-19.
[3]
胡亚辉, 董皓, 张君安. 整体式梯形转向机构最优区域值计算及优化[J]. Journal of Highway and Transportation Research and Development, 2019, 13(2): 103-110.
[4]
杜健欢, 艾长发, 黄超, 郭玉金, 蒋运兵. 界面水对沥青复合小梁疲劳性能的影响试验[J]. Journal of Highway and Transportation Research and Development, 2019, 13(1): 1-7.
[5]
姚国强, 言志信, 龙哲, 翟聚云. 基于岩质边坡相似材料的锚固界面剪应力分布规律研究[J]. Journal of Highway and Transportation Research and Development, 2019, 13(1): 8-15.
[6]
刘泽, 何矾, 黄天棋, 蒋梅东. 车辆荷载在挡土墙上引起的附加土压力研究[J]. Journal of Highway and Transportation Research and Development, 2019, 13(1): 16-23.
[7]
邱欣, 徐静娴, 陶钰强, 杨青. 路面结冰条件判别标准及SVM预测分析研究[J]. Journal of Highway and Transportation Research and Development, 2018, 12(4): 1-9.
[8]
高伟, 崔巍, 李秀凤. 半刚性基层表面抗冲刷性能试验与分析[J]. Journal of Highway and Transportation Research and Development, 2018, 12(4): 10-17.
[9]
张向东, 任昆. 煤渣改良土路基的动弹性模量及临界动应力试验研究[J]. Journal of Highway and Transportation Research and Development, 2018, 12(4): 25-32.
[10]
李龙海, 杨茹. 多次加铺的复合道面疲劳寿命分析[J]. Journal of Highway and Transportation Research and Development, 2018, 12(3): 7-15.
[11]
蔡旭, 李翔, 吴旷怀, 黄文柯. 基于旋转压实的水泥稳定再生集料设计方法研究[J]. Journal of Highway and Transportation Research and Development, 2018, 12(3): 1-6.
[12]
李金路, 冯子强, 吴佳杰, 魏姗姗, 葛智. 环境及疲劳荷载作用下碳纳米管水泥基复合材料压敏性能研究[J]. Journal of Highway and Transportation Research and Development, 2018, 12(3): 16-21.
[13]
田小革, 韩海峰, 李新伟, 吴栋, 魏东. 半刚性路面中双层半刚性基层的倒装效应[J]. Journal of Highway and Transportation Research and Development, 2018, 12(3): 22-27.
[14]
邢磊, 雷柏龄, 陈忠达, 戴学臻. 彩色沥青路面胶凝材料的制备技术[J]. Journal of Highway and Transportation Research and Development, 2018, 12(2): 1-6.
[15]
方薇, 陈向阳, 杨果林. 带齿格栅加筋挡墙工作机理的数值模拟研究[J]. Journal of Highway and Transportation Research and Development, 2018, 12(2): 7-13.