›› 2012, Vol. 33 ›› Issue (3): 702-712.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Consolidation of historical earthen sites under moisture circumstance using calcium-based hydraulic consolidant

WEI Guo-feng1, 2, ZHANG Bing-jian1, YANG Fu-wei1, HU Bao-zhong1, CHEN Bing1, WANG Xu-dong 3   

  1. 1. Department of Cultural Relics and Museology, Zhejiang University, Hangzhou 310027, China; 2. Department of History, Anhui University, Hefei 230039, China; 3. Dunhuang Academy, Dunhuang, Gansu 736200, China
  • Received:2010-10-08 Online:2012-03-10 Published:2012-03-12

Abstract: On the basis of preparation and characterization of calcium-based hydraulic consolidant, this paper makes a preliminary study of consolidation conservation of historical earthen sites under moisture circumstance. Analytic results of scanning electron microscope and X-ray diffractometry show that Ca(OH)2 are transformed into a kind of acicular secondary CaO with diameter 50 nm and length 200 nm after being calcined, and this nano-sized secondary CaO are transformed into oval plate-like Ca(OH)2 with size 200-300 nm after being slaked. Meanwhile, research results indicate that calcium hydroxide crystals undergo both substantial size reduction and clear morphological change, developing nanometer, plate-like and acicular crystals upon aging. Results of consolidation experiment of moist earthen samples reveal that permeabilities of nanometer lime-alcohol dispersions are superior to that of analytically pure Ca(OH)2-alcohol dispersions, and consolidation effects of calcium-based hydraulic consolidant are obvious. It is possible that calcium-based hydraulic consolidant will become a new consolidation material used for conservation of historical earthen sites under moisture circumstance.

Key words: historical earthen sites, moisture circumstance, hydraulic, consolidation

CLC Number: 

  • K85
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