复掺天然植物油与青麻纤维对古建筑修复灰浆抗盐冻性能的影响

doi:10.11896/cldb.22010153

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Abstract Using lime, tung oil and hemp fiber as the main raw materials, a performance-reinforced mortar material suitable for the restoration of ancient buildings was designed and prepared. The enhancement mechanism of physical and mechanical properties such as strength, water absorption, water and salt resistance of lime mortar and the change law of durability in chloride salt erosion freeze-thaw cycle environment were studied by combining macro test and micro test. The results show that the addition of tung oil can effectively resist the erosion of water and chloride on the mortar, and regulate the transformation of the crystal type of calcium carbonate in the mortar to better aragonite and aragonite to form a more dense microstructure. Hemp fiber can play a good role in reinforcing and bridging crack resistance in mortar, and improve the compressive strength and flexural strength of mortar. Moreover, the expansion of mortar cracks in freeze-thaw environment is restrained and the frost resis-tance of mortar is improved. The performance of LO₅H mortar mixed with 5% tung oil and 1.5% hemp fiber is the best. Its 90 d compressive strength and flexural strength are 45.3% and 182% higher than that of lime mortar, and its resistance to freeze-thaw cycles in water/chloride environments are both 5 times higher than that of lime mortar. The improvement effect is obvious.

Key words： restoration of ancient buildings tung oil mortar chloride salt erosion freeze-thaw cycle nuclear magnetic resonance(NMR) microstructure

Published: 25 June 2023 Online: 2023-06-20

CLC number:

TU502

Fund:National Natural Science Foundation of China (51678480), Scientific Research Project of Key Laboratory of Shaanxi Education Department (17JS071) and Key Laboratory Project of Science and Technology Co-ordination and Innovation Project in Shaanxi Province(2014SZS04-P04).

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	Articles by authors
	LU Zhe
	YAO Wenjuan
	WANG Sheliang
	WANG Shanwei
	LIU Bo

Cite this article:

LU Zhe,YAO Wenjuan,WANG Sheliang, et al. Effect of Blending Natural Plant Oil and Hemp Fiber on Salt Frost Resistance of Ancient Building Restoration Mortar[J]. Materials Reports, 2023, 37(12): 22010153-9.

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http://www.mater-rep.com/EN/10.11896/cldb.22010153 OR http://www.mater-rep.com/EN/Y2023/V37/I12/22010153

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