|Table of Contents|

Experimental study on flexural performance of full iron tailings concrete beam(PDF)

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

Issue:
2024年03期
Page:
120-128
Research Field:
建筑结构
Publishing date:

Info

Title:
Experimental study on flexural performance of full iron tailings concrete beam
Author(s):
MA Xinxin1; 2;  SUN Jianheng1;  ZHANG Ruolan1;  ZHANG Fengshuang1;  YUAN Jing1;  MENG Zhiliang1
(1. College of Urban and Rural Construction, Hebei Agricultural University, Baoding 071001, Hebei, China; 2. China Academy of Building Research Co., Ltd., Beijing 100013, China)
Keywords:
full iron tailings concrete beam;  bending test;  characteristic bending moment;  plane section assumption;  flexural stiffness
PACS:
TU528.57
DOI:
10.19815/j.jace.2022.05051
Abstract:
In order to make full use of iron tailings, and study the mechanical properties of concrete structures with iron tailings, using iron tailing powder as admixture, iron tailing gravel and iron tailing sand as coarse and fine aggregate respectively, the full iron tailings concrete(FITC)beams were prepared. FITC was compared with conventional concrete(CC)beam using fly ash as admixture, common crushed stone and river sand as coarse and fine aggregate in the bending test. First of all, the parameters of iron tailings were tested to verify their feasibility as concrete raw materials. Secondly, the bearing capacity and deflection of each stage of the beam were calculated based on the current code formula. Finally, the measured and calculated values of FITC beams and CC beam were compared and analyzed. The results show that the strength of FITC is slightly lower than that of CC, and the elastic modulus is significantly reduced. The cracking moment and ultimate moment of FITC beam are equivalent to those of CC beam. The crack resistance and bearing capacity of the beam do not significantly decrease due to the lower strength and elastic modulus of FITC compared to CC. The concrete strain of FITC beams is in good agreement with the plane section assumption before cracks appear. Under load, the strain of concrete in the tension area of FITC beams is larger than that of the CC beam. The ductility and crack spacing of FITC beams are close to those of CC beam, and the oblique crack in bending shear zone of FITC beam is closer to the top of beam than that of CC beam. The deflection of FITC beams is larger than that of CC beam under the same bending moment, and the strain of longitudinal reinforcement in FITC beams is also larger than that in CC beam. The current design code of China is appropriate for calculating the bearing capacity of FITC beams, but the deflection calculation formula should be modified.

References:

[1] ZUCCHERATTE A C V,FREIRE C B,LAMEIRAS F S.Synthetic gravel for concrete obtained from sandy iron ore tailing and recycled polyethyltherephtalate[J].Construction and Building Materials,2017,151:859-865.
[2]BIAN Z F,MIAO X X,LEI S G,et al.The challenges of reusing mining and mineral-processing wastes[J].Science,2012,337(6095):702-703.
[3]仝 宵,王社良.铁尾矿砂再生骨料混凝土力学性能及微观结构分析[J].混凝土,2021(1):91-93,97.
TONG Xiao,WANG Sheliang.Mechanical properties and microstructure analysis of recycled aggregate concrete with iron tailings[J].Concrete,2021(1):91-93,97.
[4]冯 卡,王馨语.硫铁矿尾矿矿渣改良混凝土力学性质与耐久性[J].矿产综合利用,2022(3):6-11,16.
FENG Ka,WANG Xinyu.Research on mechanical properties and durability of concrete improved by pyrite tailings and slag[J].Multipurpose Utilization of Mineral Resources,2022(3):6-11,16.
[5]ZHAO J S,NI K,SU Y P,et al.An evaluation of iron ore tailings characteristics and iron ore tailings concrete properties[J].Construction and Building Materials,2021,286:122968.
[6]ZHANG N,TANG B W,LIU X M.Cementitious activity of iron ore tailing and its utilization in cementitious materials,bricks and concrete[J].Construction and Building Materials,2021,288:123022.
[7]MENDES PROTASIO F N,RIBEIRO DE AVILLEZ R,LETICHEVSKY S,et al.The use of iron ore tailings obtained from the Germano dam in the production of a sustainable concrete[J].Journal of Cleaner Production,2021,278:123929.
[8]LIU R Z,LIU J,ZHANG Z J,et al.Accidental water pollution risk analysis of mine tailings ponds in Guanting reservoir watershed,Zhangjiakou city,China[J].International Journal of Environmental Research and Public Health,2015,12(12):15269-15284.
[9]YAO G,WANG Q,SU Y W,et al.Mechanical activation as an innovative approach for the preparation of pozzolan from iron ore tailings[J].Minerals Engineering,2020,145:106068.
[10]LV Z Q,JIANG A N,LIANG B.Development of eco-efficiency concrete containing diatomite and iron ore tailings:mechanical properties and strength prediction using deep learning[J].Construction and Building Materials,2022,327:126930.
[11]YANG M J,SUN J H,DUN C Y,et al.Cementitious activity optimization studies of iron tailings powder as a concrete admixture[J].Construction and Building Materials,2020,265:120760.
[12]CHENG Y H,HUANG F,QI S S,et al.Durability of concrete incorporated with siliceous iron tailings[J].Construction and Building Materials,2020,242:118147.
[13]SHETTIMA A U,HUSSIN M W,AHMAD Y,et al.Evaluation of iron ore tailings as replacement for fine aggregate in concrete[J].Construction and Building Materials,2016,120:72-79.
[14]ZHANG W F,GU X W,QIU J P,et al.Effects of iron ore tailings on the compressive strength and permeability of ultra-high performance concrete[J].Construction and Building Materials,2020,260:119917.
[15]陈秀云.铁尾矿砂绿色混凝土构件受力性能试验研究[D].武汉:武汉理工大学,2017.
CHEN Xiuyun.Experimental study on the mechanical properties of the tailing sand green concrete members[D].Wuhan:Wuhan University of Technology,2017.
[16]邝周飞.掺尾矿砂混凝土梁受弯性能试验研究[D].郑州:郑州大学,2015.
KUANG Zhoufei.Experimental research on the flexural performance of concrete beams with mine tailings sand[D].Zhengzhou:Zhengzhou University,2015.
[17]张龙生.铁尾矿砂混凝土简支梁抗弯刚度和裂缝试验研究[D].成都:西南交通大学,2015.
ZHANG Longsheng.Research on bending stiffness and crack of simply-supported beam of iron tailing concrete[D].Chengdu:Southwest Jiaotong University,2015.
[18]冯 拴.大掺量铁尾矿高强混凝土梁受力性能及设计方法研究[D].张家口:河北建筑工程学院,2017.
FENG Shuan.Mechanical behavior and design method for large capacity iron tailings high-strength concrete beams[D].Zhangjiakou:Hebei University of Architecture,2017.
[19]李 壮.高温后铁尾矿砂混凝土力学性能试验研究[D].广州:华南理工大学,2020.
LI Zhuang.Experimental study on mechanical properties of concrete with iron tailings after high temperature[D].Guangzhou:South China University of Technology,2020.
[20]周甲佳,姚少科,景 川,等.FRP筋-ECC梁受弯性能[J].建筑科学与工程学报,2020,37(6):46-54.
ZHOU Jiajia,YAO Shaoke,JING Chuan,et al.Flexural behavior of FRP-reinforced ECC beam[J].Journal of Architecture and Civil Engineering,2020,37(6):46-54.
[21]章一萍,李碧雄,廖 桥,等.超高强钢筋ECC梁受弯性能试验及承载力分析[J].建筑科学与工程学报,2020,37(6):38-45.
ZHANG Yiping,LI Bixiong,LIAO Qiao,et al.Flexural behaviors test and capacity analysis of ultra high strength rebar reinforced engineered cementitious composites beams[J].Journal of Architecture and Civil Engineering,2020,37(6):38-45.
[22]程东辉,王楷文,宋 超.预应力再生混凝土叠合梁受弯性能试验研究[J].建筑科学与工程学报,2022,39(2):52-60.
CHENG Donghui,WANG Kaiwen,SONG Chao.Experimental study on flexural behavior of prestressed recycled concrete composite beams[J].Journal of Architecture and Civil Engineering,2022,39(2):52-60.
[23]朱 琦,叶力豪,蔡 玮,等.UHPC-T梁抗弯性能试验研究与理论计算[J].建筑科学与工程学报,2023,40(1):65-74.
ZHU Qi,YE Lihao,CAI Wei,et al.Experimental study and theoretical calculation on flexural performance of UHPC-T beams[J].Journal of Architecture and Civil Engineering,2023,40(1):65-74.

Memo

Memo:
-
Last Update: 2024-05-20