不同工艺制度下纳米颗粒对UHPC强度的影响

doi:10.11896/cldb.21040093

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Abstract In order to fully play the enhancement effect of nano-particles on UHPC, the influences of three kinds of nano-particles including nano-SiO₂, nano-Al₂O₃ and nano-CaCO₃ on the mechanical strength of UHPC were investigated by a serials of experiments in this work, respectively. And three curing conditions such as standard curing at 20 ℃, steam curing at 80 ℃ and autoclave curing at 180 ℃ as well as the pressure molding process before setting of UHPC were adopted in this experiments. Moreover, the corresponding mechanism was discussed. The results show that nano-SiO₂, nano-Al₂O₃ and nano-CaCO₃ all exhibited the good enhancement effect on the compressive strength of UHPC. The enhancement effect of nano-SiO₂ on mechanical strength of UHPC was best, which was followed by nano-Al₂O₃ and nano-CaCO₃. The corresponding optimum content of nano-SiO₂ was about 1.5wt% under the condition of conventional vibrating compaction and was about 2.0wt% for the condition of pressure molding process. The nucleation effect of nano-particles on promoting hydration of cement and their own high chemical activity were the main reasons for the high strength growth rate of UHPC with nano-particles under standard curing condition. Furthermore, the mechanical strength of UHPC with nano-particles was significantly enhanced by the combination of pressure molding process and steam curing at 80 ℃. Both the incorporation of nano-particles and employment of pressure molding process could effectively improve the pore structure of UHPC.

Key words： ultra-high performance concrete nano-particles pressure molding curing conditions strength

Published: 10 July 2022 Online: 2022-07-12

CLC number:

TU528

Fund:National Natural Science Foundation of China (11790283) and Yunnan Provincial Science and Technology Planning Project (202004AR040022).

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	Articles by authors
	LONG Guangcheng
	YANG Kai
	CHENG Zhiqing
	WANG Huihui
	SHI Ye
	XIE Youjun

Cite this article:

LONG Guangcheng,YANG Kai,CHENG Zhiqing, et al. Effect of Nano-particles on Strength of UHPC Under Different Process Conditions[J]. Materials Reports, 2022, 36(13): 21040093-6.

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http://www.mater-rep.com/EN/10.11896/cldb.21040093 OR http://www.mater-rep.com/EN/Y2022/V36/I13/21040093

1 Arora A, Yao Y M, Mobasher B, et al. Cement and Concrete Composites, 2019, 98, 1.
2 Alkaysi M, Sherif E T, Liu Z C, et al. Cement and Concrete Composites, 2016, 66, 47.
3 Yu R, Spiesz P, Brouwers H J H. Cement and Concrete Composites, 2015, 55, 383.
4 Chen B C, Ji T, Huang Q W, et al. Journal of Architecture and Civil Engineering, 2014, 31 (3), 1 (in Chinese).
陈宝春,季韬,黄卿维,等. 建筑科学与工程学报, 2014, 31(3), 1.
5 Qin W Z, Cao F. Industrial Construction, 1999 (4), 16(in Chinese).
覃维祖,曹峰. 工业建筑, 1999(4), 16.
6 Richard, P. Aci Spring Conversion, 1994,114, 507.
7 Larrard F D. Cement and Concrete Research, 1989, 19(2), 161.
8 Huang Z Y, Cao F L. Materials Reports B:Research Papers, 2012, 26 (9), 136(in Chinese).
黄政宇,曹方良. 材料导报:研究篇, 2012, 26(9), 136.
9 Li W G, Huang Z Y, Cao F L, et al. Construction and Building Mate-rials, 2015, 95, 368.
10 Wu Z M, Khayat K H, et al. Cement and Concrete Research, 2017, 95, 249.
11 Zhu C J, Bai E L, Xu J Y, et al. Bulletin of the Chinese Ceramic Society, 2016, 35 (8), 2575(in Chinese).
朱从进,白二雷,许金余,等. 硅酸盐通报, 2016, 35(8), 2575.
12 Long G C, Shi Y, Ma K L. Advances in Cement Research, 2016, 28(2), 99.
13 Wu Z M, Shi C J, Khayat K H, et al. Construction and Building Mate-rials, 2018, 182, 124.
14 Richard P, Cheyrezy M. Cement and Concrete Research, 1995, 25(7), 1501.
15 Ipek M, Aksu M, Uysal M, et al. Construction and Building Materials, 2015, 79, 90.
16 Ipek M, Aksu M, Yilmaz K, et al. Construction and Building Materials, 2014, 66, 515.
17 Ipek M, Yilmaz K, Uysal M. Construction and Building Materials, 2012, 26(1), 459.
18 Ipek M, Yilmaz K, Mansur S, et al. Construction and Building Mate-rials, 2011, 25(1), 61.
19 Stefanidou M, Papayianni I. Composites Part B (Engineering), 2012, 43(6), 2706.
20 Wei H H. Study oneffect and mechanism of Nano-CaCO₃ in cement-based materials. Master's Thesis, Harbin Institute of Technology, China, 2013 (in Chinese).
魏荟荟. 纳米CaCO₃对水泥基材料的影响及作用机理研究. 硕士学位论文,哈尔滨工业大学2013.
21 Shi Y, Long G C, Wang S, et al. Journal of Railway Science and Engineering, 2016, 13 (5), 836 (in Chinese).
石晔,龙广成,王申,等. 铁道科学与工程学报, 2016, 13(5), 836.
22 Huang Z Y, Zu T Y. Bulletin of the Chinese Ceramic Society, 2013,32 (6), 1106 (in Chinese).
黄政宇,祖天钰. 硅酸盐通报, 2013, 32(6), 1106.
23 Zhou J, Zheng K R, Liu Z Q, et al. Cement and Concrete Research, 2019, 116, 164.
24 Zhou C S, Ren F, Wang Z, et al. Cement and Concrete Research, 2017, 100, 373.