|Table of Contents|

Basic Performance of Nano-reinforced Recycled Concrete Adopting Ultrasonic Dispersion Technology(PDF)

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

Issue:
2020年05期
Page:
124-131
Research Field:
Publishing date:

Info

Title:
Basic Performance of Nano-reinforced Recycled Concrete Adopting Ultrasonic Dispersion Technology
Author(s):
YAN Yong-dong1;  XU Peng-fei1;  YAO Jia-cheng1;  LU Chun-hua1;  YUAN Tian-jun2
1. School of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang 212013, Jiangsu, China; 2. Third Engineering Co.Ltd of CCCC Fourth Highway Engineering Co.Ltd, Beijing 100123, China
Keywords:
recycled aggregate concrete;  aggregate strengthening;  nano-technology;  ultrasonic dispersion;  interfacial transition zone
PACS:
TU528.45
DOI:
10.19815/j.jace.2019.09005
Abstract:
In order to effectively improve the basic performance of nano-materials in recycled concrete, ultrasonic technology was introduced. Four different types of nano-materials(SiO2, Al2O3, CaCO3 and GNP)were investigated respectively. Firstly, the nano-material was mixed with water reducer and water. After 30 min of ultrasonic dispersion, nano-strengthened slurry was obtained with proper amount of cement. Then the recycled aggregate was soaked in the slurry for 30 min. Finally, nano-enhanced recycled aggregate was gained after screening and drying. Compressive strength and microstructure of the recycled coarse aggregate concrete were tested. The results show that the nano-slurry after ultrasonic dispersion can effectively wrap around recycled aggregate and improve the microstructure of interface transition zone. Immersing coarse aggregate in nano-enhanced slurry can effectively increase the compressive strength of recycled coarse aggregate concrete. The compressive strength of nano-reinforced recycled concrete immersed in 0.2% nano-SiO2 reinforced slurry with 50% substitution of recycled coarse aggregate is 24.3% and 33.1% higher than unreinforced recycled concrete and ordinary concrete respectively. The nano-material fills up some original pores in the concrete and improves the compactness of the recycled concrete. The results obtained are considerably valuable for the performance improvement in recycled concrete.

References:

[1] 曹万林,赵羽习,叶涛萍.再生混凝土结构长期工作性能研究进展[J].哈尔滨工业大学学报,2019,51(6):1-17.
CAO Wan-lin,ZHAO Yu-xi,YE Tao-ping.A Review of Recent Advances in the Long-term Working Characteristic of Recycled Concrete Structure[J].Journal of Harbin Institute of Technology,2019,51(6):1-17.
[2]肖建庄,吴 磊,范玉辉.微波加热再生粗骨料改性试验[J].混凝土,2012(7):55-57.
XIAO Jian-zhuang,WU Lei,FAN Yu-hui.Test on Modification of Recycled Coarse Aggregate by Microwave Heating[J].Concrete,2012(7):55-57.
[3]肖 倍,安旭文,杨 瑞,等.再生混凝土基本力学性能试验及其影响因素研究[J].混凝土,2018(11):32-36,40.
XIAO Bei,AN Xu-wen,YANG Rui,et al. Experimental Research on Basic Mechanical Characteristics of Recycled Aggregate Concrete and Influencing Factors[J].Concrete,2018(11):32-36,40.
[4]徐 晶,王先志.纳米二氧化硅对混凝土界面过渡区的改性机制及其多尺度模型[J].硅酸盐学报,2018,46(8):1053-1058.
XU Jing,WANG Xian-zhi.Effect of Nano-silica Modification on Interfacial Transition Zone in Concrete and Its Multiscale Modelling[J].Journal of the Chinese Ceramic Society,2018,46(8):1053-1058.
[5]张津践.再生混凝土纳米强化技术及微观结构分析[D].杭州:浙江大学,2012.
ZHANG Jin-jian.Recycled Concrete’s Nano-enhance Ment Technology and Microstructural Analysis[D].Hangzhou:Zhejiang University,2012.
[6]李文贵,龙 初,罗智予,等.纳米改性再生骨料混凝土破坏机理研究[J].建筑材料学报,2017,20(5):685-691,786.
LI Wen-gui,LONG Chu,LUO Zhi-yu,et al.Investigation on Failure Mechanism of Nanomodified Recycled Aggregate Concrete[J].Journal of Building Materials,2017,20(5):685-691,786.
[7]朱从进,白二雷,许金余,等.纳米氧化铝对混凝土静动态力学性能的影响[J].硅酸盐通报,2016,35(8):2575-2580,2589.
ZHU Cong-jin,BAI Er-lei,XU Jin-yu,et al.Effect of Nano-alumina on Quasi-static and Dynamic Properties of Concrete[J].Bulletin of the Chinese Ceramic Society,2016,35(8):2575-2580,2589.
[8]PALLA R,KARADE S R,MISHRA G,et al.High Strength Sustainable Concrete Using Silica Nanoparticles[J].Construction and Building Materials,2017,138:285-295.
[9]李媛媛.纳米强化对再生细骨料制品性能的影响及作用机理研究[D].杭州:浙江大学,2017.
LI Yuan-yuan.Research on the Effect and Mechanism of Nano-strengthening on the Properties of Cement-based Products with Recycled Fine Aggregate[D].Hangzhou:Zhejiang University,2017.
[10]朱勇年,张鸿儒,孟 涛,等.纳米SiO2改性再生骨料混凝土工程应用研究及实体性能监测[J].混凝土,2014(7):138-144.
ZHU Yong-nian,ZHANG Hong-ru,MENG Tao,et al.Performance of Nano-SiO2 Modified Recycled Aggregate Concrete Applied in a Real Project[J].Concrete,2014(7):138-144.
[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 Jian-zhuang,ZHANG Peng,ZHANG Qing-tian,et al.Basic Mechanical Properties of Seawater Sea-sand Recycled Concrete[J].Journal of Architecture and Civil Engineering,2018,35(2):16-22.
[12]詹培敏,孙斌祥,何智海,等.纳米碳酸钙对水泥基材料性能影响的研究进展[J].硅酸盐通报,2018,37(3):881-887,910.
ZHAN Pei-min,SUN Bin-xiang,HE Zhi-hai,et al.Research Progress of Effect of Nano-calcium Carbonate on the Properties of Cement-based Materials[J].Bulletin of the Chinese Ceramic Society,2018,37(3):881-887,910.
[13]曹明莉,张会霞,张 聪.石墨烯对水泥净浆力学性能及微观结构的影响[J].哈尔滨工业大学学报,2015,47(12):26-30.
CAO Ming-li,ZHANG Hui-xia,ZHANG Cong.Effect of Graphene on Mechanical Properties and Microstructure of Cement Paste[J].Journal of Harbin Institute of Technology,2015,47(12):26-30.
[14]肖建庄,李佳彬,孙振平,等.再生混凝土的抗压强度研究[J].同济大学学报:自然科学版,2004,32(12):1558-1561.
XIAO Jian-zhuang,LI Jia-bin,SUN Zhen-ping,et al.Study on Compressive Strength of Recycled Aggregate Concrete[J].Journal of Tongji University:Natural Science,2004,32(12):1558-1561.
[15]杨海涛,田石柱.尺寸效应对再生混凝土的影响[J].中南大学学报:自然科学版,2016,47(11):3818-3823.
YANG Hai-tao,TIAN Shi-zhu.Influence of Size Effect on Properties of Recycled Concrete[J].Journal of Central South University:Science and Technology,2016,47(11):3818-3823.
[16]陈宗平,徐金俊,郑华海,等.再生混凝土基本力学性能试验及应力-应变本构关系[J].建筑材料学报,2013,16(1):24-32.
CHEN Zong-ping,XU Jin-jun,ZHENG Hua-hai,et al.Basic Mechanical Properties Test and Stress-strain Constitutive Relations of Recycled Coarse Aggregate Concrete[J].Journal of Building Materials,2013,16(1):24-32.
[17]汪振双,王宝民,苏昊林,等.橡胶颗粒对再生混凝土耐久性影响[J].哈尔滨工业大学学报,2015,47(6):109-112.
WANG Zhen-shuang,WANG Bao-min,SU Hao-lin,et al.Influence of Rubber Particles on Durability of Recycled Coarse Aggregate Concrete[J].Journal of Harbin Institute of Technology,2015,47(6):109-112.
[18]ZHANG M H,ISLAM J.Use of Nano-silica to Reduce Setting Time and Increase Early Strength of Concretes with High Volumes of Fly Ash or Slag[J].Construction and Building Materials,2012,29:573-580.
[19]ZHANG M H,ISLAM J,PEETHAMPARAN S.Use of Nano-silica to Increase Early Strength and Reduce Setting Time of Concretes with High Volumes of Slag[J].Cement Concrete and Composites,2012,34(5):650-662.
[20]SUN G W,ZHANG Y S,SUN W,et al.Multi-scale Prediction of the Effective Chloride Diffusion Coefficient of Concrete[J].Construction and Building Materials,2011,25(10):3820-3831.
[21]应敬伟,肖建庄.模型再生混凝土氯离子非线性扩散细观仿真[J].建筑材料学报,2013,16(5):863-868.
YING Jing-wei,XIAO Jian-zhuang.Meso-level Simulation of Chloride Nonlinear Diffusion in Modeled Recycled Aggregate Concrete[J].Journal of Building Materials,2013,16(5):863-868.
[22]彭 晖,戈娅萍,杨振天,等.氧化石墨烯增强水泥基复合材料的力学性能及微观结构[J].复合材料学报,2018,35(8):2132-2139.
PENG Hui,GE Ya-ping,YANG Zhen-tian,et al.Mechanical Properties and Microstructure of Graphene Oxide Reinforced Cement-based Composites[J].Acta Materiae Compositae Sinica,2018,35(8):2132-2139.

Memo

Memo:
-
Last Update: 2020-10-15