Fracture Performance of Recycled Aggregate Concrete Modified by Nanomaterials

被引：0
|
作者：
Luo S. [1 ]
Lin Q. [1 ]
Li W. [1 ]
Wang D. [1 ]
机构：
[1] College of Civil Engineering, Fuzhou University, Fuzhou
来源：
Jianzhu Cailiao Xuebao/Journal of Building Materials | 2022年 / 25卷 / 11期
关键词：
double‑K fracture parameter; nanoindentation; nano‑CaCO[!sub]3[!/sub; nano‑SiO[!sub]2[!/sub; recycled aggregate concrete（RAC）;
D O I：
10.3969/j.issn.1007-9629.2022.11.007
中图分类号：
学科分类号：
摘要：
Recycled aggregate concrete （RAC） was modified by adding nano‑SiO2 （nano‑silica sol and nano‑SiO2 powder）and nano‑CaCO3 powder to study the fracture performance. The fracture property of RAC modified by nano‑materials was tested by three‑point bending beam method and traditional electrical measurement. The results show that the 28 d compressive strength and splitting tensile strength of RAC can be effectively improved by adding proper amount of nano‑SiO2 and nano‑CaCO3. Adding 1.0% nano‑silica sol，0.5% nano‑SiO2 powder and 2.0% nano‑CaCO3 powder respectively has the most effective on the improvement of double‑K fracture parameters and fracture energy. After the addition of nanomaterials， more cracks pass through the recycled aggregate than that for ordinary concrete； nanomaterials promote production of higher density hydrate and reduction of the number of internal pore in interface transition zone. © 2022 Tongji University. All rights reserved.
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页码：1151 / 1158
页数：7
相关论文
共 34 条
  • [1] TANG Q, XIAO P, KOU C J, Et al., Physical， chemical and interfacial properties of modified recycled concrete aggregates for asphalt mixtures： A review［J］, Construction and Building Materials, 312, (2021)
  • [2] GUO Z, TU A, CHEN C, Et al., Mechanical properties， durability， and life‑cycle assessment of concrete building blocks incorporating recycled concrete aggregates［J］, Journal of Cleaner Production, 199, pp. 136-149, (2018)
  • [3] POURANIAN M R, SHISHEHBOR M., Sustainability assessment of green asphalt mixtures：A review［J］, Environments, 6, 6, (2019)
  • [4] LUO Surong, CHENG Shaokun, XIAO Jianzhuang, Et al., Fatigue behavior of nano‑modified recycled aggregate concrete under uniaxial compression［J］, Engineering Mechanics, 38, 10, pp. 134-144, (2021)
  • [5] GAO Song, GONG Yaoyao, BAN Shunli, Et al., Effect of ion erosion on microstructure of multiple interface zone of recycled concrete［J］, Bulletin of the Chinese Ceramic Society, 39, 8, pp. 2567-2573, (2020)
  • [6] CAO Yubin, LI Qiuyi, WANG Zhongxing, Et al., Reconstruction technique and application of multi interface structure model of recycled concrete［J］, Bulletin of the Chinese Ceramic Society, 36, 8, pp. 2678-2682, (2017)
  • [7] FALLAHNEJAD H, DAVOODI M R, NIKBIN I M., The influence of aging on the fracture characteristics of recycled aggregate concrete through three methods［J］, Structural Concrete, 22, pp. E74-E93, (2021)
  • [8] GHORBEL E, WARDEH G., Influence of recycled coarse aggregates incorporation on the fracture properties of concrete, Construction and Building Materials, 154, 15, pp. 51-60, (2017)
  • [9] LI A, XIAO J Z, ZHANG Y M, Et al., Fracture behavior of recycled aggregate concrete under three‑point bending［J］, Cement and Concrete Composites, 104, (2019)
  • [10] ZHANG H R, ZHAO Y X, MENG T, Et al., Surface treatment on recycled coarse aggregates with nanomaterials［J］, Journal of Materials in Civil Engineering, 28, 2, (2016)
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