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Abstract

The furnace bottom slag of a coal-fired power plant in Zaozhuang, Shandong was grinded and mixed with Portland cement and limestone powder to prepare composite powder. Meanwhile, carbonate was adopted as the excitation agent, and the slag-based foamed lightweight dirt road material was prepared by the physical foaming method. This paper mainly focused on studying the influence of wet density of slag lightweight dirt on the mechanical properties, working performance, defoaming rate, and porosity. The test results show that the unconfined compression strength of coal-fired slag-based lightweight dirt decreases significantly with the reducing wet density, the flow expansion decreases linearly with the increasing foam rate, and the defoaming rate of lightweight dirt changes little in the density range of 650-750 kg/m3. Given various performance indicators, when lightweight dirt with wet density of 650 kg/m3 was prepared by employing the slag ratio of 50%, cement content of 40%, limestone powder of 10%, and 4% excitation agent, it can better meet the working performance of cast-in-place lightweight dirt, with the relatively low defoaming rate. The 3-day strength of the sample can reach 0.79 MPa, and the 28-day strength can reach 1.63 MPa.

Publication Date

8-18-2022

DOI

10.14048/j.issn.1671-2579.2022.04.041

First Page

222

Last Page

226

Submission Date

May 2025

Reference

[1] 倪斌. 煤炭在我国能源结构优化中基础性作用的思考[J]. 中国能源, 2004, 26(7): 16-20. NI Bin. Thinking on basic function of coal resources in optimizing the structure of energy of China[J]. Energy of China, 2004, 26(7): 16-20. [2] 高雪峰, 张海英, 杨向阳, 等. 燃煤炉渣作为新型掺合料在预拌混凝土中的应用[J]. 四川水泥, 2016(3): 311-313.GAO Xuefeng, ZHANG Haiying, YANG Xiangyang, et al. Application of coal-fired slag as a new admixture in ready-mixed concrete[J]. Sichuan Cement, 2016(3): 311-313. [3]　王晨.《工业固体废物资源综合利用评价管理暂行办法》和《国家工业固体废物资源综合利用产品目录》发布[J]. 精细与专用化学品,2018(6):1. WANG Chen. Promulgation of Interim Measures for the Evaluation and Management of Comprehensive Utilization of Industrial Solid Waste Resources and National Catalog of Industrial Solid Waste Resource Comprehensive Utilization Products [J]. Fine and Specialty Chemicals, 2018(6): 1. [4] 刘红宇, 尹维新, 洪彩霞. 粉煤灰和煤粉炉渣用于建筑砂浆的试验研究[J]. 混凝土与水泥制品, 2008(2): 51-54. LIU Hongyu, YIN Weixin, HONG Caixia. Experimental study on application of fly ash and pulverized coal slag in building mortar[J]. China Concrete and Cement Products, 2008(2): 51-54. [5] 冉帆. 炉渣性质及其污水处理效果的应用研究[D]. 天津: 天津城建大学, 2014. RAN Fan. Study on the properties of slag and its application in sewage treatment[D]. Tianjin: Tianjin Chengjian University, 2014. [6] 王开峰, 彭娜, 刘德良. 面向矿山废弃地复垦的炉渣污泥人工土壤的理化特性[J]. 环境工程学报, 2012, 6(8): 2875-2881.WANG Kaifeng, PENG Na, LIU Deliang. Physicochemical properties of artificial soil composed of sewage sludge by slag for application of mine land reclamation[J]. Chinese Journal of Environmental Engineering, 2012, 6(8): 2875-2881. [7] 张雷, 赵玉静, 俞瑾. 炉底渣磨细灰的物性参数研究[J]. 混凝土世界, 2019(6): 68-71. ZHANG Lei, ZHAO Yujing, YU Jin. Study on the physical property of ground furnace bottom slag[J]. China Concrete, 2019(6): 68-71. [8] 曹新荣. 激发剂对掺燃煤炉渣普通砂浆性能的影响[J]. 科技资讯, 2011, 9(23): 31.CAO Xinrong. Effect of activator on properties of ordinary mortar mixed with coal-fired slag[J]. Science & Technology Information, 2011, 9(23): 31. [9] 陈忠平, 王树林. 气泡混合轻质土及其应用综述[J]. 中外公路, 2003, 23(5): 117-120.CHEN Zhongping, WANG Shulin. Foamed cement and its application[J]. Journal of China & Foreign Highway, 2003, 23(5): 117-120. [10] 闫利峰.现浇泡沫轻质土材料性能与施工技术研究[D].天津:河北工业大学,2013. YAN Lifeng. Research on Material Properties and Construction Technology of Cast-in-Place Foamed Lightweight Soil [D]. Tianjin: Hebei University of Technology, 2013. [11] 王新春, 胡如进, 史伟, 等. 促进水泥工业温室气体减排的政策建议[J]. 中国水泥, 2013(6): 39-41.WANG Xinchun, HU Rujin, SHI Wei, et al. Policy suggestions on promoting greenhouse gas emission reduction in cement industry[J]. China Cement, 2013(6): 39-41.

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