Preparation of Low-Shrinkage and Radiation-Shielding Ultra-High Performance Concrete and Its Performance Formation Mechanism

被引：0
|
作者：
Zhang G. [1 ,2 ]
Wu M. [1 ]
Yang J. [1 ,2 ]
Ding Q. [3 ]
Hou D. [4 ]
Deng C. [3 ]
机构：
[1] School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei
[2] Anhui Province Key Laboratory of Advanced Building Materials, Hefei
[3] School of Materials Science and Engineering, Wuhan University of Technology, Wuhan
[4] School of Civil Engineering, Qingdao University of Technology, Qingdao
来源：
Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2021年 / 49卷 / 11期
关键词：
Impact resistance; Radiation shielding properties; Titanium-rich heavyweight slag sand; Ultra-high performance concrete; Volume stability;
D O I：
10.14062/j.issn.0454-5648.20210314
中图分类号：
学科分类号：
摘要：
An ultra-high performance concrete (UHPC) with high strength, low shrinkage, strong radiation shielding and impact resistance was prepared, and its performance formation mechanism was analyzed. The results show that the as-prepared low shrinkage radiation shielding UHPC has 28-d compressive strength of > 120 MPa, 28-d flexural strength of > 20 MPa, 180-d shrinkage rate of < 385×10-6, radiation shielding efficiency of 85% and energy consumption for dynamic impact cracking of 5 600 kJ/m3. The high performance of this UHPC is mainly due to the dense-packing design, interfacial strengthening effect of titanium-rich heavyweight slag sand and "pin structure", the combination of internal curing of titanium-rich heavyweight slag sand and shrinkage compensation of expansive agent, the radiation shielding effect of Ba and Fe elements in barite powder/sand, titanium-rich heavyweight slag sand and steel fiber, and the combining toughening effect of steel fiber and polymer fiber. © 2021, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.
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页码：2405 / 2415
页数：10
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