| Inorganic Materials and Ceramic Matrix composites |
|
|
|
|
|
| Effect of Liquid Erosion Inhibitor on Water Absorption and Salt Crystallization Resistance of Concrete |
| SHI Liang1, 2, XIE Deqing1, 3, WANG Xueming4, YUAN Jun4, MU Song1, 3, WEI Peng4, ZHU Mengwei4
|
1 State Key Laboratory of High Performance Civil Engineering Materials, Nanjing 210008, China
2 Shanghai Suke Building Technology Development Co., Ltd., Shanghai 201399, China
3 Jiangsu Sobute New Materials Co., Ltd., Nanjing 211103, China
4 Northwest Electric Power Design Institute Co., Ltd., of China Power Engineering Consulting Group, Xi'an 710075, China |
|
|
|
|
Abstract Influence of four concrete liquid erosion inhibitors (cementaid-KT, ZBH, P400, SBT-TIA) on the water absorption and loss ability of concrete were systematically studied. The liquid erosion inhibitors with the best performance were screened out to further study its effect on the fresh performance, mechanical properties, chloride ion rapid migration coefficient and sulfate resistance semi-soaking performance of concrete. The result showed that: the addition of four liquid erosion inhibitors all could significantly reduce the water absorption rate and water loss rate, while SBT-TIA showed the best water absorption and loss ability. The salt-crystal resistance resistance ability of concrete mixed with SBT-TIA erosion inhibitor was greatly improved, the salt crystallization height was 3.5 cm, far less than 11 cm of the reference concrete. This is due to the addition of SBT-TIA slow down the water absorption rate and water loss rate of the test block, and it is difficult for saline solution to be transferred to the high position under the wick effect, thus leading to the height of salt crystal and the amount of salt crystal precipitation both increase slowly. The compressive strength of concrete mixed with SBT-TIA erosion inhibitor at all ages were slightly decreased (7.5%, 5.9% and 9.5% respectively at 3 d, 7 d and 28 d), but the rapid chloride migration coefficient decreased abnormally (13.3%—25.7%). The layer grinding test of concrete underwater zone proved that the addition of SBT-TIA erosion inhibitor could effectively inhibit the transmission of water and ion in concrete. Compared with the benchmark block, the sulfate ion content in the test block at the same depth decreased significantly after adding SBT-TIA erosion inhibitor, the maximum decrease was 29.2%.
|
|
Published: 14 July 2020
|
|
|
| About author:: Liang Shireceived his master degree of materials science and engineering from Chongqing University in July 2009. He is now a senior engineer of State Key Laboratory of High Performance Civil Engineering Materials and Shanghai Suke Building Technology Development Co., Ltd. He mainly focuses on the research of concrete durability assessment, testing and enhancement technologies research. He has published more than 50 journal papers. He has 5 authorized national invention patents. He has also taken charge of writing 2 standards and partici-pated in the preparation 4 standards. |
|
|
1 Wang Q C. Journal of Lanzhou Railway Institute, 1997(4),28(in Chinese).
王起才. 兰州铁道学院学报, 1997(4),28.
2 Han T C. Chinese Railway, 1999(8), 2(in Chinese).
韩同春. 中国铁路, 1999(8), 2.
3 Zhang G H. Concrete, 2012(1),49(in Chinese).
张光辉. 混凝土, 2012(1),49.
4 Xiang X L, Peng C, Zeng M. Commercial Concrete, 2012(12),39(in Chinese).
向小龙, 彭超, 曾敏. 商品混凝土, 2012(12),39.
5 Arya C, Buenfeld N R, Newman J B. Cement Concrete Restructure, 1990,20(2),291.
6 Mehta P K, Paulo J M. Concrete microstructure properties and materials, McGraw-Hill Professional, USA, 2013.
7 Stark D. Durability of concrete in sulfate-rich soils, Portland Cement Association, USA, 1989.
8 Irassar E F, Di M A, Batic O R. Cement and Concrete Research, 1996, 26(1), 113.
9 Stark D. Performance of Concrete in Sulfate Environments, Portland Cement Association, USA,2002.
10 Liu Z Q, Li X N, Hou L. Journal of Building Materials, 2017,20(3),439(in Chinese).
刘赞群,李湘宁,侯乐. 建筑材料学报, 2017,20(3),439.
11 Yu H F. Durability, mechanism and service life prediction method of high performance concrete in salt lake area. Ph.D. Thesis, Southeast University, China, 2004(in Chinese).
余红发.盐湖地区高性能混凝土的耐久性、机理与使用寿命预测方法.博士学位论文,东南大学,2004.
12 Crammod N. Cement and Concrete Composites, 2002, 24(3/4), 393.
13 Brown P W, Doerr A. Cement and Concrete Research, 2000, 30(3),411.
14 Hu M Y, Long F M, Tang M S. Cement and Concrete Research, 2006, 36(10), 2006.
15 Flatt R J, Schutter G W. Materials Research Society Symposium Procee-dings, 2002, 712, 29.
16 Tsui N, Flatt R J, Scherer G W. Journal of Cultural Heritage, 2003, 4(2),109.
17 Rodriguez N C, Doehne E. Earth Surf Processes and Landforms, 1999, 24(2/3), 91. |
|
|
|
渝公网安备50019002502923号 © Editorial Office of Materials Reports.
2020, Vol. 34 
