鼓浪屿历史风貌建筑砂浆退化现状分析及修复技术探讨

doi:10.11896/cldb.19110203

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Abstract The current situation of Kulangsu historical architectural mortar and the reasons for its performance degradation were studied and analyzed through field researching and sampling analyzing. The results show that the historic buildings in Kulangsu are mostly made of lime-based mortar, most of which are lime clay mixed mortar and a few are lime mortar, and serious degradation such as cracking, mildew, water seepage, weathering and spalling has been widespread. The external causes of the deterioration of lime-based mortar performance are the long-term effect of sea wind and salt fog erosion and the combination of high temperature, high humidity and other destruction factors. The closer the buildings are to the coastline, the more severe the damage is. The gas-hardness property of lime and the low pozzolanic reaction among lime, clay and quartz sand are the inherent factors resulting in the low compressive and flexural strength of the lime-based mortar itself, the low bonding strength between the base block and it, and its poor durability. Under the guidance of the “raw materials, original process, and minimum intervention” principle of the rehabilitation of historical buildings, the restoration method of using modified shell ash mortar as reinforcing material is put forward. This method is to add active silicon (aluminum) material to the traditional shell ash mortar through modification technology so that the gas hard shell ash can be transformed into a cementitious material which can possess both hydraulic and gas hardness, and then use this modified lime mortar as a reinforcement material to replace the deteriorated mortar construction so as to complete the restoration.

Key words： Kulangsu historical buildings mortar degradation restoration

Published: 28 January 2021

CLC number:

TU36

About author:: Hongmei Huhas graduated from the gelling materials and products of Wuhan University of Technology in July 1982, and obtained the master degree of materialogy from Wuhan University of Technology in July 2002. Dating November, 2000 to September 1982, teached in Changchun Building Materials Industrial School and Wuhan University of Science and Technology successively. In October 2000, she was engaged in the teac-hing and scientific research work in Xiamen University. Research interests: high performance concrete, new building materials, recycling of solid waste building materials, reinforcement materials, etc. Courses taught: civil engineering materials,building material,new building mate-rials,the new concrete,etc.
Tao Liureceived his B.E. degree from Xiamen University in June 2016. He is currently pursuing his M.D. at the School of Architecture and Civil Engineering, Xiamen University under the supervision of Prof. Hongmei Hu.

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Cite this article:

HU Hongmei,LIU Tao,WU Qixin. Analysis of Mortar Deterioration of the Historical Buildings in Kulangsu and Discussion on Restoration Technology[J]. Materials Reports, 2021, 35(2): 2026-2031.

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http://www.mater-rep.com/EN/10.11896/cldb.19110203 OR http://www.mater-rep.com/EN/Y2021/V35/I2/2026

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