US 11,685,698 B2
Device and method for reinforcing weathered stone relics by using low temperature plasma to activate calcium hydroxide in carbon dioxide atmosphere
Jiachang Chen, Zhengzhou (CN); Liangshuai Zhang, Zhengzhou (CN); Siyu He, Zhengzhou (CN); Xiaolin Chen, Zhengzhou (CN); Jing Tang, Zhengzhou (CN); Haitao Yan, Zhengzhou (CN); Xinguang Wang, Zhengzhou (CN); Ming Chi, Zhengzhou (CN); Xinzhan Cui, Zhengzhou (CN); and Xin Liu, Zhengzhou (CN)
Assigned to HENAN PROVINCIAL INSTITUTE OF CULTURAL HERITAGE AND ARCHAEOLOGY, Zhengzhou (CN)
Filed by HENAN PROVINCIAL INSTITUTE OF CULTURAL HERITAGE AND ARCHAEOLOGY, Zhengzhou (CN)
Filed on Sep. 29, 2020, as Appl. No. 17/36,499.
Prior Publication US 2021/0179504 A1, Jun. 17, 2021
Int. Cl. C04B 41/45 (2006.01); C04B 41/50 (2006.01); C04B 41/00 (2006.01)
CPC C04B 41/501 (2013.01) [C04B 41/009 (2013.01); C04B 41/4558 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A method for reinforcing weathered stone relics by using low temperature plasma to activate calcium hydroxide in carbon dioxide atmosphere, comprising the following steps:
(1) removing attachments on a surface of stone relics;
(2) dispersing calcium hydroxide in an isopropanol aqueous solution with a volume concentration of about 5%-5.5% to obtain a saturated reinforcement solution, wherein the calcium hydroxide has a particle size of lower than about 6.5 μm;
(3) spraying the reinforcement solution obtained in step (2) on a weathered layer of the stone relics;
(4) spraying the stone relics sprayed with reinforcement solution obtained in step (3) with cold plasma with a temperature lower than about 50° C. generated from the nozzle of a low temperature plasma source loaded with carbon dioxide; and
(5) repeating steps (3) and (4) 10-15 times.