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.