|本期目录/Table of Contents|

[1]延永东,徐鹏飞,姚嘉诚,等.超声分散处理的纳米再生混凝土基本性能[J].建筑科学与工程学报,2020,37(05):124-131.[doi:10.19815/j.jace.2019.09005]
 YAN Yong-dong,XU Peng-fei,YAO Jia-cheng,et al.Basic Performance of Nano-reinforced Recycled Concrete Adopting Ultrasonic Dispersion Technology[J].Journal of Architecture and Civil Engineering,2020,37(05):124-131.[doi:10.19815/j.jace.2019.09005]
点击复制

超声分散处理的纳米再生混凝土基本性能(PDF)
分享到:

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

卷:
37卷
期数:
2020年05期
页码:
124-131
栏目:
出版日期:
2020-09-30

文章信息/Info

Title:
Basic Performance of Nano-reinforced Recycled Concrete Adopting Ultrasonic Dispersion Technology
文章编号:
1673-2049(2020)05-0124-08
作者:
延永东1徐鹏飞1姚嘉诚1陆春华1袁天军2
1.江苏大学 土木工程与力学学院,江苏 镇江 212013; 2.中交四公局第三工程有限公司,北京 100123
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
关键词:
再生混凝土 骨料强化 纳米技术 超声分散 界面过渡区
Keywords:
recycled aggregate concrete aggregate strengthening nano-technology ultrasonic dispersion interfacial transition zone
分类号:
TU528.45
DOI:
10.19815/j.jace.2019.09005
文献标志码:
A
摘要:
为了充分发挥纳米材料在提升再生混凝土基本性能方面的作用,分别采用SiO2,Al2O3,CaCO3和石墨烯(GNP)4种纳米材料与减水剂、水混合,经30 min超声分散后添加适量水泥制成纳米强化浆液,然后将再生骨料浸泡于浆液中30 min,筛分晾干后形成纳米强化再生骨料。对采用此种骨料制备的混凝土进行抗压性能测试和微观结构检测。结果表明:采用超声分散后的纳米浆液能够有效包裹于再生骨料的表面,使其界面过渡区的微观结构得到改善; 纳米强化浆液浸泡粗骨料的方式能有效地提高再生混凝土的抗压强度,其中浸泡于0.2%纳米SiO2强化浆液、取代率为50%的纳米强化再生混凝土抗压强度最高,分别比未强化的再生混凝土和普通混凝土提高24.3%,33.1%; 纳米材料填充了混凝土内的部分孔隙,提高了再生混凝土的密实度。所得结果可为再生混凝土的性能提升提供技术支持。
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.

参考文献/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.

相似文献/References:

[1]丁发兴,方常靖,龚永智,等.再生混凝土单轴力学性能指标统一计算方法[J].建筑科学与工程学报,2014,31(04):16.
 DING Fa-xing,FANG Chang-jing,GONG Yong-zhi,et al.Unified Calculation Method of Uniaxial Mechanical Performance Index of Recycled Concrete[J].Journal of Architecture and Civil Engineering,2014,31(05):16.
[2]丁 陶,肖建庄.基于振动台试验的预制再生混凝土框架后浇边节点分析[J].建筑科学与工程学报,2013,30(03):78.
 DING Tao,XIAO Jian-zhuang.Analysis of Cast-in-situ Exterior Joints of Precast Recycled Aggregate Concrete Frame by Shaking Table Tests[J].Journal of Architecture and Civil Engineering,2013,30(05):78.
[3]肖建庄,郑世同,王 静.再生混凝土长龄期强度与收缩徐变性能[J].建筑科学与工程学报,2015,32(01):21.
 XIAO Jian-zhuang,ZHENG Shi-tong,WANG Jing.Long-term Strength, Shrinkage and Creep Properties of Recycled Aggregate Concrete[J].Journal of Architecture and Civil Engineering,2015,32(05):21.
[4]肖建庄,刘 胜,TRESSERRAS Joan.钢管/GFRP管约束再生混凝土柱偏心受压试验[J].建筑科学与工程学报,2015,32(02):21.
 XIAO Jian-zhuang,LIU Sheng,TRESSERRAS Joan.Eccentric Loading Test on Recycled Aggregate Concrete Columns Confined by Steel Tube/GFRP Tube[J].Journal of Architecture and Civil Engineering,2015,32(05):21.
[5]谢建和,李自坚,孙明炜.硅粉对纤维橡胶再生混凝土抗压性能影响试验[J].建筑科学与工程学报,2016,33(03):72.
 XIE Jian-he,LI Zi-jian,SUN Ming-wei.Experiment About Influence of Silica Fume on Compressive Performance of Fiber Reinforced Rubber Recycled Concrete[J].Journal of Architecture and Civil Engineering,2016,33(05):72.
[6]肖建庄,李宏,亓萌.基于静载强度分布的再生混凝土疲劳强度预测[J].建筑科学与工程学报,2010,27(04):7.
 XIAO Jian-zhuang,LI Hong,QI Meng.Fatigue Strength Prediction of Recycled Aggregate ConcreteBased on Static Strength Distribution[J].Journal of Architecture and Civil Engineering,2010,27(05):7.
[7]肖建庄,朱永明,王璞瑾,等.再生混凝土U型叠合梁抗剪性能[J].建筑科学与工程学报,2012,29(02):1.
 XIAO Jian-zhuang,ZHU Yong-ming,WANG Pu-jin,et al.Shear Behavior of Recycled Concrete U-shaped Composite Beams[J].Journal of Architecture and Civil Engineering,2012,29(05):1.
[8]肖建庄,黄运标,郑永朝.高温后再生混凝土的残余抗折强度[J].建筑科学与工程学报,2009,26(03):32.
 XIAO Jian-zhuang,HUANG Yun-biao,ZHENG Yong-chao.Residual Flexural Strength of Recycled ConcreteAfter Elevated-temperatures[J].Journal of Architecture and Civil Engineering,2009,26(05):32.
[9]肖建庄,雷斌.再生混凝土碳化模型与结构耐久性设计[J].建筑科学与工程学报,2008,25(03):66.
 XIAO Jian-zhuang,LEI Bin.Carbonation Model and Structural Durability Design for Recycled Concrete[J].Journal of Architecture and Civil Engineering,2008,25(05):66.
[10]郭 凯,马浩辉,王 强.氧化石墨烯对再生混凝土界面过渡区的影响[J].建筑科学与工程学报,2018,35(05):217.
 GUO Kai,MA Hao-hui,WANG Qiang.Effect of Graphene Oxide on Interfacial Transition Zone of Recycled Concrete[J].Journal of Architecture and Civil Engineering,2018,35(05):217.

备注/Memo

备注/Memo:
收稿日期:2019-09-10
基金项目: 国家自然科学基金项目(51608233,51778272,51878319)
作者简介:延永东(1982-),男,陕西榆林人,副教授,工学博士,博士后,E-mail:yand@ujs.edu.cn。
更新日期/Last Update: 2020-10-15