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Mechanical Properties of Cement Stone with Modified CaSO4 Whisker
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Bojian ZHANG1, Zhigang PENG1, Qian FENG1, Changjun ZOU1, Jian ZHANG2
Journal of the Chinese Ceramic Society | 2021, 49(10) : 2286 - 2297
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Journal of the Chinese Ceramic Society | 2021, 49(10): 2286-2297
Mechanical Properties of Cement Stone with Modified CaSO4 Whisker
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Bojian ZHANG1, Zhigang PENG1, Qian FENG1, Changjun ZOU1, Jian ZHANG2
Affiliations
  • 1.School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China
  • 2.Drilling and Production Engineering Technology Research Institute of Chuanqing Drilling Engineering Co., Ltd, Xi'an 710018, Shanxi, China

    • ZHANG Bojian (1993-), male, Doctoral candidate. E-mail:

About Author:

ZHANG Bojian (1993-), male, Doctoral candidate. E-mail:

Published: 2021-10-20 doi: 10.14062/j.issn.0454-5648.20200994
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In order to further improve the mechanical properties of the cement stone with CaSO4 whisker, the surface of the whisker was modified via tetraethylorthosilicate (TEOS) to improve the interface bonding property between the whisker and the cement stone. The surface composition and properties of the modified CaSO4 whisker were investigated by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, contact angle measurement. The results show that the hydrolysate of TEOS reacts with the hydroxyl groups on the surface of CaSO4 whisker and forms the stable amorphous SiO2 on the surface of CaSO4 whisker. Based on the results by mechanical properties test, the modified CaSO4 whisker can further improve the mechanical properties of cement. The microstructure of the interface between the whisker and the cement material, the hydration products, the structure of the cement stone, were analyzed by scanning electron microscopy and pore size distribution test, which reveals the action mechanism of modified CaSO4 whisker reinforced cement. Since SiO2 coated on the surface of the modified CaSO4 whisker reacts with the free Ca(OH)2 in cement-based material, thus promoting the formation of more hydration products, such as calcium silicate hydrate gel chain (C-S-H), as well as makes the whiskers tightly wrapped by hydration products, thus enhancing the bonding effect between the whiskers and cement-based materials and causing more energy consumed during the development of crack. Also, the hydration reaction can improve the compactness of the cement structure, further enhancing the mechanical properties of cement.

calcium sulfate whisker  /  modified whisker  /  interfacial bonding performance  /  enhancement and toughening  /  mechanical properties
张博建, 彭志刚, 冯茜, 邹长军, 张健. 含有改性CaSO4晶须的固井水泥石的力学性能. 硅酸盐学报, 2021 , 49 (10) : 2286 -2297 . DOI: 10.14062/j.issn.0454-5648.20200994
Bojian ZHANG, Zhigang PENG, Qian FENG, Changjun ZOU, Jian ZHANG. Mechanical Properties of Cement Stone with Modified CaSO4 Whisker[J]. Journal of the Chinese Ceramic Society, 2021 , 49 (10) : 2286 -2297 . DOI: 10.14062/j.issn.0454-5648.20200994
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Year 2021 volume 49 Issue 10
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Article Info
doi: 10.14062/j.issn.0454-5648.20200994
  • Receive Date：2020-12-22
  • Online Date：2026-10-30
  • Published：2021-10-20
Article Data
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History
  • Received：2020-12-22
  • Revised：2021-03-17
Funding
Affiliations
    1.School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China
    2.Drilling and Production Engineering Technology Research Institute of Chuanqing Drilling Engineering Co., Ltd, Xi'an 710018, Shanxi, China

Corresponding:

PENG Zhigang (1976-), male, Ph.D., Professor. E-mail:
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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