«上一篇/Previous Article|本期目录/Table of Contents|下一篇/Next Article»

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

41卷

期数:

2024年04期

页码:

107-117

栏目:

建筑材料

出版日期:

2024-07-19

文章信息/Info

Title:

Preparation and mechanics property of coal chemical solid waste concrete

文章编号:

1673-2049(2024)04-0107-11

作者:

吕生华¹,折佳龙¹,杨居辉¹,李 超²,任洋军³,贾 君³,甘志超⁴

(1. 陕西科技大学 轻工科学与工程学院,陕西 西安 710021; 2. 陕西润一科工贸有限公司,陕西 西安 710065; 3. 西安肖申克新材料有限公司,陕西 西安 710200; 4. 天地(榆林)开采工程技术有限公司, 陕西 榆林 719000)

Author(s):

LYU Shenghua¹, SHE Jialong¹, YANG Juhui¹, LI Chao², REN Yangjun³, JIA Jun³, GAN Zhichao⁴

(1. College of Bioresources Chemical and Materials Engineering,Shanxi University of Science & Technology, Xi'an 710021, Shaanxi, China; 2. Shaanxi Runyi Science Industry and Trade Co., Ltd, Xi'an 710065, Shaanxi, China; 3. Xi'an Shawshank New Material Co., Ltd, Xi'an 710200, Shaanxi, China; 4. Tiandi(Yulin)Mining Engineering Technology Co., Ltd., Yulin 719000, Shaanxi, China)

关键词:

煤化工固废混凝土;  黏附固化剂;  氧化石墨烯;  力学性能;  干缩性能

Keywords:

coal chemical solid waste concrete;  adhesive curing agent;  graphene oxide;  mechanical property;  drying shrinkage property

分类号:

TU528

DOI:

10.19815/j.jace.2022.07006

文献标志码:

A

摘要:

为解决煤化工固废替代砂石制备混凝土时由于自身孔隙多导致的吸水量大、流动性差及强度低等问题,从固废粗渣表面封堵涂层处理及水泥水化产物形貌调控两个方面提出解决方案。首先制备了一种含有三嗪环、氨基及醛基的固废粗渣表面处理用黏附固化剂(ACA),将其与水泥混合,在固废粗渣表面形成填充封堵涂层,从而解决煤化工固废粗渣制备混凝土时吸水量大及流动性差的问题。其次,制备了氧化石墨烯(GO),并将其与聚羧酸减水剂(PC)混合形成插层复合物(PC-GO),通过掺入PC-GO实现超低掺量GO在水泥基体中的均匀分散及对水泥水化产物形貌结构的调控。在表面封堵涂层及水泥水化产物结构调控的协同作用下制备了高含量煤化工固废混凝土,表征了ACA的结构及其形成封堵涂层的作用原理,提出了超低掺量GO的吸附式分散机理及调控水泥水化产物形貌的晶核效应和模板效应。结果表明:含有60%和80%(质量分数)煤化工固废的混凝土的抗压强度分别大于40 MPa和30 MPa,抗折强度分别大于6 MPa和4.5 MPa,同时高含量煤化工固废混凝土具有良好的抗干缩性能; 研究成果对于制备高含量煤化工固废混凝土及煤化工固废的大规模资源化利用具有积极的意义。

Abstract:

In order to solve the problems of large water absorption, poor fluidity and low strength caused by the large pores of coal chemical solid waste instead of sand and gravel in the preparation of concrete, solutions were proposed from two aspects: surface sealing coating treatment of solid waste coarse slag and morphology control of cement hydration products. Firstly, an adhesive curing agent(ACA)containing triazine ring, amino group and aldehyde group was prepared for surface treatment of solid waste coarse slag, which was mixed with cement to form a filling and plugging coating on the surface of solid waste coarse slag, so as to solve the problem of large water absorption and poor fluidity when preparing concrete from solid waste coarse slag of coal chemical industry. Secondly, graphene oxide(GO)was prepared and mixed with polycarboxylate superplasticizer(PC)to form an intercalated composite(PC-GO). By adding PC-GO, the uniform dispersion of ultra-low content GO in cement matrix and the regulation of the morphology and structure of cement hydration products were realized. High content of coal chemical solid waste concrete was prepared under the synergistic effect of surface plugging coating and structural regulation of cement hydration products. The structure of ACA and the mechanism of forming plugging coating were characterized. The adsorption dispersion mechanism of ultra-low content GO and the crystal nucleus effect and template effect of regulating the morphology of cement hydration products were proposed. The results show that the compressive strength of concrete containing 60% and 80%(mass fraction)coal chemical solid waste is greater than 40 MPa and 30 MPa respectively, and the flexural strength is greater than 6 MPa and 4.5 MPa respectively. At the same time, the high content of coal chemical solid waste concrete has good dry shrinkage resistance. The research results have positive significance for the preparation of high content coal chemical solid waste concrete and the large-scale resource utilization of coal chemical solid waste.

参考文献/References:

[1] 商晓甫,马建立,张 剑,等.煤气化炉渣研究现状及利用技术展望[J].环境工程技术学报,2017,7(6):712-717.
SHANG Xiaofu,MA Jianli,ZHANG Jian,et al.Research status and prospects of utilization technologies of slag from coal gasification[J].Journal of Environmental Engineering Technology,2017,7(6):712-717.
[2]王儒洋,范佳明,江 尧,等.煤气化渣-土壤复配下的生态风险评价及重金属在紫花苜蓿中的富集与迁移[J].煤化工,2021,49(6):13-18,33.
WANG Ruyang,FAN Jiaming,JIANG Yao,et al.Ecological pollution risk assessment of coal gasification slag-soil compound condition and heavy metal accumulation and migration in alfalfa planting[J].Coal Chemical Industry,2021,49(6):13-18,33.
[3]刘崇国,匡建平,罗春桃,等.煤气化灰渣资源化利用策略研究[J].当代化工研究,2019(17):23-25.
LIU Chongguo,KUANG Jianping,LUO Chuntao,et al.Research on resource utilization strategy of coal gasification ash[J].Modern Chemical Research,2019(17):23-25.
[4]宋秉懋,周广林.双碳目标下我国现代化煤化工产业高质量发展研究[J].中国煤炭,2022,48(3):56-61.
SONG Bingmao,ZHOU Guanglin.Research on the high quality development of China's modern coal chemical industry under the goal of coal peak and coal neutrality[J].China Coal,2022,48(3):56-61.
[5]宁永安,段一航,高宁博,等.煤气化渣组分回收与利用技术研究进展[J].洁净煤技术,2020,26(增1):14-19.
NING Yongan,DUAN Yihang,GAO Ningbo,et al.Research progress on recovery and utilization technology of coal gasification slag components[J].Clean Coal Technology,2020,26(S1):14-19.
[6]刘 峰,郭林峰,赵路正.双碳背景下煤炭安全区间与绿色低碳技术路径[J].煤炭学报,2022,47(1):1-15.
LIU Feng,GUO Linfeng,ZHAO Luzheng.Research on coal safety range and green low-carbon technology path under the dual-carbon background[J].Journal of China Coal Society,2022,47(1):1-15.
[7]党春阁,刘 铮,宋丹娜,等.榆林市重点产业“三废” 治理问题及建议[J].环境与可持续发展,2019,44(3):68-71.
DANG Chunge,LIU Zheng,SONG Danna,et al.Environmental controlling problems and suggestions of the “three wastes” of key industries in Yulin[J].Environment and Sustainable Development,2019,44(3):68-71.
[8]郑国华.煤化工项目固体废物资源化利用现状及趋势[J].煤炭加工与综合利用,2017(8):6-8,38,94.
ZHENG Guohua.Brief analysis for current status and trends for utilizations of solid waste resource about coal chemical project[J].Coal Processing & Comprehensive Utilization,2017(8):6-8,38,94.
[9]史兆臣,戴高峰,王学斌,等.煤气化细渣的资源化综合利用技术研究进展[J].华电技术,2020,42(7):63-73.
SHI Zhaochen,DAI Gaofeng,WANG Xuebin,et al.Review on the comprehensive resources utilization technology of coal gasification fine slag[J].Huadian Technology,2020,42(7):63-73.
[10]方新军,陈 阳,申联星,等.榆林兰炭产业现状及发展建议[J].煤炭加工与综合利用,2022(2):60-66.
FANG Xinjun,CHEN Yang,SHEN Lianxing,et al.Development situation and development suggestions of semicoke industry in Yulin country[J].Coal Processing & Comprehensive Utilization,2022(2):60-66.
[11]ISHIKAWA Y,TOMOSAWA F,KUMAGAI S.A basic study on application of granulated coal slag collected from integrated coal gasfication combined cycle system to fine aggregate for concrete[J].Journal of Structural and Construction Engineering(Transactions of AIJ),2010,75(651):887-893.
[12]ISHIKAWA Y,FURUKAWA Y,ABE M.A basic study on application of granulated coal slag collected from igcc system to fine aggregate for concrete based on comparisons with the property of various slag fine aggregate[J].Journal of Structural and Construction Engineering(Transactions of AIJ),2012,77(676):799-805.
[13]YAMANAKA Y,FUJIWARA H,MARUOKA M,et al.Experimental study on properties of mortar containing molten slag as fine aggregate[J].ACI Special Publication,2018,326:345-352.
[14]JUNG B,LEE S J,LEE S,et al.Physico-chemical characterization of slag waste from coal gasification syngas plants:effect of the gasification temperature on slag waste as construction material[J].Materials Testing,2017,59(9):783-789.
[15]SASI T,MIGHANI M,ORS E,et al.Prediction of ash fusion behavior from coal ash composition for entrained-flow gasification[J].Fuel Processing Technology,2018,176:64-75.
[16]LI Z Z,ZHANG Y Y,ZHAO H Y,et al.Structure characteristics and composition of hydration products of coal gasification slag mixed cement and lime[J].Construction and Building Materials,2019,213:265-274.
[17]高 鹏,李庆宏,田建平,等.煤气化炉渣路面基层材料研究与应用[J].武汉理工大学学报(交通科学与工程版),2021,45(1):155-160.
GAO Peng,LI Qinghong,TIAN Jianping,et al.Research and application of road base material prepared by coal gasification slag[J].Journal of Wuhan University of Technology(Transportation Science & Engineering),2021,45(1):155-160.
[18]杨 科,魏 祯,赵新元,等.黄河流域煤电基地固废井下绿色充填开采理论与技术[J].煤炭学报,2021,46(增2):925-935.
YANG Ke,WEI Zhen,ZHAO Xinyuan,et al.Theory and technology of underground green filling mining of solid waste in coal-fired power base of the Yellow River basin[J].Journal of China Coal Society,2021,46(S2):925-935.
[19]肖建生,文相浩,刁云宇,等.备煤炼焦中的固体废弃物资源化利用技术概述[J].燃料与化工,2019,50(2):50-52.
XIAO Jiansheng,WEN Xianghao,DIAO Yunyu,et al.Resource utilization of waste solids in coal preparation[J].Fuel & Chemical Processes,2019,50(2):50-52.
[20]朱菊芬,李 健,闫 龙,等.煤气化渣资源化利用研究进展及应用展望[J].洁净煤技术,2021,27(6):11-21.
ZHU Jufen,LI Jian,YAN Long,et al.Research progress and application prospect of coal gasification slag resource utilization[J].Clean Coal Technology,2021,27(6):11-21.
[21]田巧艳,亢福仁,张凯煜,等.煤基固废生态化利用研究进展[J].榆林学院学报,2021,31(6):57-62.
TIAN Qiaoyan,KANG Furen,ZHANG Kaiyu,et al.Research progress on ecological utilization of coal-based solid waste[J].Journal of Yulin University,2021,31(6):57-62.
[22]桂 灿,徐子芳,江玉洁,等.氧化石墨烯/再生水泥基复合材料的制备[J].复合材料学报,2021,38(5):1526-1534.
GUI Can,XU Zifang,JIANG Yujie,et al.Preparation of graphene oxide/recycled cement-based composite materials[J].Acta Materiae Compositae Sinica,2021,38(5):1526-1534.
[23]焦 敏.氧化石墨烯对新拌水泥浆体流变性的影响[J].硅酸盐通报,2021,40(7):2159-2164.
JIAO Min.Influence of graphene oxide on rheological properties of fresh cement paste[J].Bulletin of the Chinese Ceramic Society,2021,40(7):2159-2164.
[24]WANG Q,QI G D,WANG Y,et al.Research progress on the effect of graphene oxide on the properties of cement-based composites[J].New Carbon Materials,2021,36(4):729-750.
[25]吕生华,孙 婷,刘晶晶,等.氧化石墨烯纳米片层对水泥基复合材料的增韧效果及作用机制[J].复合材料学报,2014,31(3):644-652.
LYU Shenghua,SUN Ting,LIU Jingjing,et al.Toughening effect and mechanism of graphene oxide nanosheets on cement matrix composites[J].Acta Materiae Compositae Sinica,2014,31(3):644-652.
[26]LV S H,MA Y J,QIU C C,et al.Effect of graphene oxide nanosheets of microstructure and mechanical properties of cement composites[J].Construction and Building Materials,2013,49:121-127.
[27]李清富,郑连群,靳九贵,等.高性能混凝土断裂性能与耐久性能试验研究[M].北京:人民交通出版社,2015.
LI Qingfu,ZHENG Lianqun,JIN Jiugui,et al.Experimental study on fracture properties and durability of high performance concrete[M].Beijing:China Communications Press,2015.

相似文献/References:

备注/Memo

备注/Memo:

收稿日期:2023-07-02
基金项目:陕西省区域创新能力引导计划项目(2021QFY04-04); 国家自然科学基金项目(21276152)
作者简介:吕生华(1963-),男,工学博士,教授,博士生导师,E-mail:lvsh@sust.edu.cn。

常用功能

更新日期/Last Update: 2024-07-20