Particle Characteristics of Recycled Fine Aggregate and Properties of Prepared Mortar Based on Particle Shape Analysis

Abstract

Abstract: Based on the analysis of the particle morphology parameters of recycled fine aggregate by the digital image technology, the particle characteristics such as bulk density, water absorption and crushing value of recycled fine aggregate were studied, and the workability and mechanical properties of cement prepared with the recycled fine aggregates were analyzed. The results show that compared with the standard sand and natural river sand at the same grade, the parameters such as dullness, aspect ratio, solidity and roundness of recycled fine aggregate are decreased, and the crushing value and water absorption are significantly increased. The fluidity of the prepared cement mortar with recycled fine aggregate decreases significantly when the mass substitution amount of recycled fine aggregate reaches 30%, and the compressive strength and peak stress decrease significantly when the mass substitution amount of recycled fine aggregate reaches 40%.

Key words: recycled fine aggregate, particle morphology, particle characteristic, mortar, fluidity, compressive strength

CLC Number:

TU528

SHI Yanke, ZHANG Luobing, WANG Yuhang, LIU Weiwei, HOU Rongbin, MA Juntao. Particle Characteristics of Recycled Fine Aggregate and Properties of Prepared Mortar Based on Particle Shape Analysis[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(12): 4061-4069.

References

[1] 崔素萍,刘晓.建筑废弃物资源化关键技术及发展战略[M].北京:科学出版社,2017.
CUI S P, LIU X. Key technologies and development strategies of construction waste recycling[M]. Beijing: Science Press, 2017 (in Chinese).
[2] 卢洪波.建筑垃圾处理与处置[M].郑州:河南科学技术出版社,2016.
LU H B, LIAO Q Q, SI C J. Construction waste treatment and disposal[M]. Zhengzhou: Henan Science and Technology Press, 2016 (in Chinese).
[3] 李北星,王威,陈梦义,等.粗骨料的等轴率、圆度和球度及其相互关系[J].建筑材料学报,2015,18(4):531-536.
LI B X, WANG W, CHEN M Y, et al. Isometric ratio, roundness and sphericity of coarse aggregates and their relationship[J]. Journal of Building Materials, 2015, 18(4): 531-536 (in Chinese).
[4] 曾晓辉,戴亚鹏,瞿福林,等.基于图像处理技术的石灰石机制砂形貌研究[J].西南交通大学学报,2017,52(1):69-74.
ZENG X H, DAI Y P, QU F L, et al. Morphology of limestone manufactured sand based on image processing technology[J]. Journal of Southwest Jiaotong University, 2017, 52(1): 69-74 (in Chinese).
[5] 钟国才,范志,李文科,等.机制砂形貌特性的测试与分析[J].贵州大学学报(自然科学版),2020,37(1):52-58.
ZHONG G C, FAN Z, LI W K, et al. Test and analysis of morphology characteristics of mechanism sand[J]. Journal of Guizhou University (Natural Sciences), 2020, 37(1): 52-58 (in Chinese).
[6] 靳月清,刘巍,杨希涛.基于球形度比的精品机制砂粒形特征研究[J].铁道建筑,2020,60(2):148-151.
JIN Y Q, LIU W, YANG X T. Research on the shape characteristics of fine machine-made sand based on sphericity ratio[J]. Railway Engineering, 2020, 60(2): 148-151 (in Chinese).
[7] ZEGHICHI L, BENGHAZI Z, BAALI L. The effect of the kind of sands and additions on the mechanical behaviour of S.C.C[J]. Physics Procedia, 2014, 55: 485-492.
[8] ROCCO C G, ELICES M. Effect of aggregate shape on the mechanical properties of a simple concrete[J]. Engineering Fracture Mechanics, 2009, 76(2): 286-298.
[9] 黄晓峰.粗骨料形状对混凝土物理和力学性能的影响[D].杭州:浙江工业大学,2010.
HUANG X F. Effect of coarse aggregate shape on the physicomechanical properties of concrete[D]. Hangzhou: Zhejiang University of Technology, 2010 (in Chinese).
[10] 魏艺博,陈雷,于蕾,等.机制砂颗粒特性对胶砂综合性能的影响研究[J].公路交通科技(应用技术版),2018,14(7):137-138.
WEI Y B, CHEN L, YU L, et al. Research on the influence of the particle characteristics of machine-made sand on the comprehensive performance of mortar[J]. Highway and Transportation Science and Technology (Applied Technology Edition), 2018, 14(7): 137-138 (in Chinese).
[11] 邢心魁,刘晶,孙冠晓,等.粗骨料形状对混凝土力学性质的影响[J].混凝土,2014(2):61-63+67.
XING X K, LIU J, SUN G X, et al. Influence of different shape of coarse aggregate on concrete mechanical properties[J]. Concrete, 2014(2): 61-63+67 (in Chinese).
[12] 史巍,侯景鹏.再生混凝土技术及其配合比设计方法[J].建筑技术开发,2001,28(8):18-20.
SHI W, HOU J P. Technology and mix design on recycled concrete[J]. Building Technique Development, 2001, 28(8): 18-20 (in Chinese).
[13] 肖建庄,孙振平,李佳彬,等.废弃混凝土破碎及再生工艺研究[J].建筑技术,2005,36(2):141-144.
XIAO J Z, SUN Z P, LI J B, et al. Studies on crushing and regenerating technology of waste concrete[J]. Architecture Technology, 2005, 36(2): 141-144 (in Chinese).
[14] 张领雷.废弃混凝土全组分建材化再生利用的关键技术研究[D].徐州:中国矿业大学,2018.
ZHANG L L. Key technologies on reuse and reactivation in building materials of all components of waste concrete[D]. Xuzhou: China University of Mining and Technology, 2018 (in Chinese).
[15] 刘天杰,刘新飞.再生骨料比表面积和形状指数测定方法计算与分析[J].长江科学院院报,2020,37(5):170-173+179.
LIU T J, LIU X F. Determining specific surface area and shape index of recycled aggregate: calculation and analysis[J]. Journal of Yangtze River Scientific Research Institute, 2020, 37(5): 170-173+179 (in Chinese).
[16] 苏栋,吴炯,肖政健,等.基于三维扫描和球谐分析的骨料和再生骨料颗粒形状表征[J].沈阳建筑大学学报(自然科学版),2020,36(5):827-835.
SU D, WU J, XIAO Z J, et al. Geometrical characterization of natural and recycled aggregate particles based on 3D scanning and spherical harmonic analyses[J]. Journal of Shenyang Jianzhu University (Natural Science), 2020, 36(5): 827-835 (in Chinese).
[17] NAGATAKI S, GOKCE A, SAEKI T, et al. Assessment of recycling process induced damage sensitivity of recycled concrete aggregates[J]. Cement and Concrete Research, 2004, 34(6): 965-971.
[18] FAN C C, HUANG R, HWANG H, et al. Properties of concrete incorporating fine recycled aggregates from crushed concrete wastes[J]. Construction and Building Materials, 2016, 112: 708-715.
[19] 邢成,丁涛,周捍东,等.粒度粒形分布特点对板材锯切和油漆砂光粉尘流动性的影响[J].林业科学,2018,54(12):142-148.
XING C, DING T, ZHOU H D, et al. Influence of size and shape distribution on the flowability of particles emitted during panel cutting and paint sanding[J]. Scientia Silvae Sinicae, 2018, 54(12): 142-148 (in Chinese).