Hao Qian

Dr. Hao Qian

School of Civil Engineering, Qingdao University of Technology, Qingdao, Shandong, China
orcid

Research Focus & Metrics

Academic Career Length

8Years (2019-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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28 June 2024 in Journal of Energy Storage
Verified
Journal Article
Closed access
DYDongming Yan
Dongming Yan
JMJiaxi Mao
Jiaxi Mao
RGRongfeng Gao
Rongfeng Gao
WWWenxin Wang
Wenxin Wang
SWSuxi Wang
Suxi Wang
YLYi Liu
Yi Liu

1 September 2021 in Surface and Coatings Technology
Verified
Journal Article
Closed access
Hao QianHao Qian
Hao Qian
SCShikun Chen
Shikun Chen
TWTielong Wang
Tielong Wang
GCGong Cheng
Gong Cheng
XCXin Chen
Xin Chen
DYDongming Yan
Dongming Yan

3 September 2022 in Materials
Verified
Journal Article
Open access
PDF file
XZXiuyu Zhu
Xiuyu Zhu
Hao QianHao Qian
Hao Qian
HWHongxiao Wu
Hongxiao Wu
QZQuan Zhou
Quan Zhou
HFHuiping Feng
Huiping Feng
Dongming YanDongming Yan
Dongming Yan
The geopolymerization of aluminosilicate materials in alkaline environments is a complex physicochemical process that greatly influences the microstructure and engineering performances. This work aims to reveal the geopolymerization process of metakaolin-based geopolymer (MKG) in the first 5 d. Physicochemical characteristics of different evolution stages are disposed of in chronological order. The evolutions of electrical resistivity, dehydration process, volume deformation, and ionic concentration are comprehensively analyzed. Results show that chemical dissolution produces large dismantled fragments rather than small free monomers. The formation of a solid matrix follows the “spatial filling rule”, which means that gels grow by locking swelling fragments to form a framework, then densely filling residual space. Based on chemical models, early geopolymerization of MKG can be divided into six stages from the physicochemical perspective as dismantling, locking fixation, free filling, limited filling, second dissolution, and local mending. Those findings expand the understanding of the phase evolution of the early geopolymerization process; thus, the microstructure of MKG can be better manipulated, and its engineering performances can be improved.

22 February 2024 in Ceramics International
Verified
Journal Article
Closed access
DYDongming Yan
Dongming Yan
YSYangpiaoxue Shi
Yangpiaoxue Shi
YZYajun Zhang
Yajun Zhang
WWWenxin Wang
Wenxin Wang
Hao QianHao Qian
Hao Qian
SRShengqian Ruan
Shengqian Ruan

1 November 2019 in Journal of Materials in Civil Engineering
Verified
Journal Article
Closed access
Hao QianHao Qian
Hao Qian
Dongming YanDongming Yan
Dongming Yan
SCShikun Chen
Shikun Chen
GCGong Chen
Gong Chen
YTYe Tian
Ye Tian
GCGenda Chen
Genda Chen
In this study, quasi-static tensile tests of high-strength steel rebars, after exposure to 20°C–1,300°C, and dynamic tensile tests at a strain rate of up to 0.25  s−1 , after exposure to 20°C–900°C, were conducted to understand the effect of elevated temperature and strain rate on the mechanical properties of the high-strength steel rebars. The coupled effect of high temperature exposure and strain rate was discovered; the strength equation and the constitutive model of high-strength steel rebars were proposed with the coupled effect taken into account. Specifically, the color and weight of steel rebars, after exposure to above 700°C, change significantly because of oxidation. High temperature significantly affects the fracture morphology of rebars when statically tested, but it has little effect when dynamically tested. High-strength rebars begin to degrade at 500°C with their residual yield and ultimate strength remaining greater than 60% and 70%, respectively, after exposure to temperatures above 900°C. Their strengths are affected by strain rate more significantly at higher temperatures because of microstructural changes. The hardening strain is related to both temperature and strain rate; the ultimate strain is affected by temperature only.

29 January 2022 in Surface and Coatings Technology
Verified
Journal Article
Closed access
Hao QianHao Qian
Hao Qian
ZXZhenwen Xu
Zhenwen Xu
SCShikun Chen
Shikun Chen
YLYi Liu
Yi Liu
DYDongming Yan
Dongming Yan