|Table of Contents|

Mechanical and microscopic properties of dredged sand mortar at different thermostatic time(PDF)

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

Issue:
2024年02期
Page:
39-48
Research Field:
建筑材料
Publishing date:

Info

Title:
Mechanical and microscopic properties of dredged sand mortar at different thermostatic time
Author(s):
WU Chaoguo1;  CHEN Xudong1;  NING Yingjie2;  ZHANG Wei3; 4
(1. College of Civil Engineering and Transportation, Hohai University, Nanjing 210098, Jiangsu, China; 2. Zhejiang Communications Construction Group Co., Ltd., Hangzhou 310051, Zhejiang, China; 3. College of Water Resources and Hydropower, Hohai University, Nanjing 210098, Jiangsu, China; 4. Yangzhou Water Resources Bureau, Yangzhou 225000, Jiangsu, China)
Keywords:
dredged sand mortar;  thermostatic time;  dredged sand admixture;  mechanical property;  microstructure
PACS:
TU37
DOI:
10.19815/j.jace.2022.04110
Abstract:
In order to investigate the characteristics of mortars with different dredged sand admixtures and different thermostatic time, the thermostatic time(4, 8, 12, 16 h)and the dredged sand admixtures(0%, 15%, 50%)were selected as test variables. 15 sets of specimens were prepared for testing using dredged sand instead of mechanism sand from Yangtze River, and the mechanism of the effect of different thermostatic time on the compressive properties and microstructure of mortar with different dredged sand admixtures was analyzed based on the test results. The results show that when the dredged sand admixture is 0% and 50%, the later compressive strength first increases and then decreases with the increase of thermostatic time, and the maximum is at the thermostatic time of 8 h. When the dredged sand admixture is 15%, its compressive strength gradually decreases with the increase of thermostatic time, and the maximum is at the thermostatic time of 4 h. The longer the thermostatic time, the greater the distillation damage, which is unfavorable to the later strength development, and the different change laws under different dredged sand admixtures. With the increase of dredged sand admixture, the later compressive strength first increases and then decreases, and the maximum is at 15% of dredged sand admixture. Dredged sand has a certain optimization effect on the compressive strength of mortar, and dredged sand particles with very small particle size can effectively fill the pore defects in mortar, especially after the distillation damage of mortar. The optimization effect of dredged sand is amplified under the steaming condition, and the compressive strength of dredged sand mortar is further enhanced, and the enhancement of compressive strength of steam curing mortar by dredged sand is much greater than that of standard curing mortar, and the longer the thermostatic time is, the more obvious the enhancement of compressive strength is. When the thermostatic time is 4-8 h and the dredged sand admixture is 15%, the steam-raised dredged sand mortar with the performance not lower than that of pure machine-made sand mortar can be prepared.

References:

[1] 李青云.推进长江航道疏浚砂综合利用:《关于促进砂石行业健康有序发展的指导意见》解读[N].中国水运报,2020-04-01(1).
LI Qingyun.Promoting the comprehensive utilization of dredged sand in the Yangtze River waterway:Interpretation of “Guidance on promoting the healthy and orderly development of the sand and gravel industry”[N].China Water Transport News,2020-04-01(1).
[2]董超强,章荣军,苗 雨,等.偏高岭土对理化复合法处理淤泥浆强度的影响[J].华中科技大学学报(自然科学版),2021,49(10):1-6.
DONG Chaoqiang,ZHANG Rongjun,MIAO Yu,et al.Effect of metakaolin on strength of mud slurry treated by physicochemical composite method[J].Journal of Huazhong University of Science and Technology(Natural Science Edition),2021,49(10):1-6.
[3]肖建庄,沈剑羽,高 琦,等.工程弃土现状与资源化创新技术[J].建筑科学与工程学报,2020,37(4):1-13.
XIAO Jianzhuang,SHEN Jianyu,GAO Qi,et al.Current situation and innovative technology for recycling of engineering waste soil[J].Journal of Architecture and Civil Engineering,2020,37(4):1-13.
[4]PENG L,CHEN B.Mechanical behavior,durability,thermal performances and microstructure of GGBFS-modified MPC solidified dredged sludge[J].Construction and Building Materials,2021,303:124557.
[5]诸裕良,臧英平,江朝华,等.基于长江下游疏浚砂的砂浆力学性能试验研究[J].水运工程,2020(9):56-60,96.
ZHU Yuliang,ZANG Yingping,JIANG Chaohua,et al.Experimental study on mortar's mechanical property based on dredged sand in lower reaches of the Yangtze River[J].Port & Waterway Engineering,2020(9):56-60,96.
[6]李升涛,陈徐东,张 伟,等.基于长江下游超细疏浚砂的碱激发矿渣混凝土力学性能[J].复合材料学报,2022,39(1):335-343.
LI Shengtao,CHEN Xudong,ZHANG Wei,et al.Mechanical properties of alkali activated slag concrete with ultra fine dredged sand from Yangtze River[J].Acta Materiae Compositae Sinica,2022,39(1):335-343.
[7]HASSOUNE M,CHRAIBI G,FATMAOUI H,et al.Stability of quay wall made on concrete blocks with a formulation based on dredging sand[J].Materials Today:Proceedings,2021,36:47-53.
[8]PENG X,ZHOU Y,JIA R,et al.Preparation of non-sintered lightweight aggregates from dredged sediments and modification of their properties[J].Construction and Building Materials,2017,132:9-20.
[9]ZHANG Q A,LIU H F,LIU Q A,et al.Study the fire resistance of desert sand concrete(DSC)with interface phase through uniaxial compression tests and analyses[J].Advances in Civil Engineering,2021,2021:1-21.
[10]LIU H F,MA Y C,MA J R,et al.Frost resistance of desert sand concrete[J].Advances in Civil Engineering,2021,2021:1-17.
[11]肖建庄,张 鹏,张青天,等.海水海砂再生混凝土的基本力学性能[J].建筑科学与工程学报,2018,35(2):16-22.
XIAO Jianzhuang,ZHANG Peng,ZHANG Qingtian,et al.Basic mechanical properties of seawater sea-sand recycled concrete[J].Journal of Architecture and Civil Engineering,2018,35(2):16-22.
[12]HUANG X F,LI G B,PAN X J,et al.Kinetic characteristics of lightweight aggregates obtained from dredged sediment[J].Journal of Thermal Analysis and Calorimetry,2016,126(3):1201-1209.
[13]黄 安,李北星,杨建波,等.蒸养制度对预制桥面板混凝土强度与抗渗性的影响[J].硅酸盐通报,2021,40(4):1170-1177.
HUANG An,LI Beixing,YANG Jianbo,et al.Effect of steam curing system on strength and impermeability of precast bridge deck concrete[J].Bulletin of the Chinese Ceramic Society,2021,40(4):1170-1177.
[14]胡少伟,娄本星,尹阳阳,等.蒸养混凝土早期断裂性能研究[J].水利水运工程学报,2020(4):88-95.
HU Shaowei,LOU Benxing,YIN Yangyang,et al.Experimental study on early fracture properties of steam-cured concrete[J].Hydro-Science and Engineering,2020(4):88-95.
[15]金 阳,毋存粮,陈小羊,等.自燃煤矸石作矿物掺合料对混凝土性能的影响[J].混凝土,2021(9):86-89,93.
JIN Yang,WU Cunliang,CHEN Xiaoyang,et al.Influence of self-ignited coal gangue as mineral admixture on properties of concretes[J].Concrete,2021(9):86-89,93.
[16]DE LARRARD F.Concrete mixture proportioning:a scientific approach[M].London:E & FN Spon,1999.
[17]肖建庄,邓 琪,夏 冰.混凝土制备低碳化演进与展望[J].建筑科学与工程学报,2022,39(5):1-12.
XIAO Jianzhuang,DENG Qi,XIA Bing.Evolution and prospects of low-carbon concrete preparation[J].Journal of Architecture and Civil Engineering,2022,39(5):1-12.
[18]董 华,钱春香.骨料尺寸对微区泌水及界面区结构特征的影响[J].建筑材料学报,2008,11(3):334-338.
DONG Hua,QIAN Chunxiang.Influence of aggregate size on micro-bleeding and microstructure of interfacial transition zone[J].Journal of Building Materials,2008,11(3):334-338.
[19]肖建庄,马旭伟,刘 琼,等.全再生混凝土概念的衍化与研究进展[J].建筑科学与工程学报,2021,38(2):1-15.
XIAO Jianzhuang,MA Xuwei,LIU Qiong,et al.Evolvement and research progress of concept for full recycled concrete[J].Journal of Architecture and Civil Engineering,2021,38(2):1-15.
[20]杨曙兰,刘伟庆,方 园.纤维增强复合材料性能表征方法研究进展[J].建筑科学与工程学报,2017,34(6):93-103.
YANG Shulan,LIU Weiqing,FANG Yuan.Research progress of characterization method of performance of fiber reinforced polymer[J].Journal of Architecture and Civil Engineering,2017,34(6):93-103.
[21]YANG S G,WANG J F,CUI S P,et al.Impact of four kinds of alkanolamines on hydration of steel slag-blended cementitious materials[J].Construction and Building Materials,2017,131:655-666.
[22]YANG J,HU H C,HE X Y,et al.Effect of steam curing on compressive strength and microstructure of high volume ultrafine fly ash cement mortar[J].Construction and Building Materials,2021,266:120894.
[23]NIRY RAZAFINJATO R,BEAUCOUR A L,HEBERT R L,et al.High temperature behaviour of a wide petrographic range of siliceous and calcareous aggregates for concretes[J].Construction and Building Materials,2016,123:261-273.
[24]MALIK M,BHATTACHARYYA S K,BARAI S V.Thermal and mechanical properties of concrete and its constituents at elevated temperatures:a review[J].Construction and Building Materials,2021,270:121398.
[25]张高展,葛竞成,张春晓,等.养护制度对混凝土微结构形成机理的影响进展[J].材料导报,2021,35(15):15125-15133.
ZHANG Gaozhan,GE Jingcheng,ZHANG Chunxiao,et al.Review on the microstructure formation mechanism in concrete material under different curing regimes[J].Materials Reports,2021,35(15):15125-15133.
[26]薛翠真,申爱琴,郭寅川.基于孔结构参数的掺CWCPM混凝土抗压强度预测模型的建立[J].材料导报,2019,33(8):1348-1353.
XUE Cuizhen,SHEN Aiqin,GUO Yinchuan.Prediction model for the compressive strength of concrete mixed with CWCPM based on pore structure parameters[J].Materials Reports,2019,33(8):1348-1353.

Memo

Memo:
-
Last Update: 2024-03-25