LIU Cheng-yu1 , LI Hong-song2
(1. College of Environment and Resourcesof Fuzhou University，Fuzhou350108, China;
2. Chinese Academy of Cultural Heritage，Beijing 100029, China)
Abstract: In this paper, based respectively on the data of laboratory and on-the-spot test of two kinds of rock materials, clay feldspathic sandstone and microlite dolomitic marble, the performance characteristics of rock corrosion and its impact on the physical and mechanical properties of rock surface layer are described. The research indicates that: ① for the corroded portion of rock, the contents of soluble mineral ingredients andtransportable element oxide increase gradually from the exterior inwards, while those of clay minerals and loss on ignition gradually decrease. In addition, the rock samples have completely changed in micro texture , which is mainly expressed by well-developed corrosion holes and corrosion fissures among particles, corrosion holes on the surface of soluble mineral particles; ② the corrosion causes a decrease in strength and an increase in the hygroscopic coefficient of rock surface layer. It is shown that the more severe the corrosion is, the higher the hygroscopic coefficient and the worse the uniformity and strength of rock surface layer will be. What’s more, the corrosion makes the porosity and pore size of rock surface layer obviously increase.
Key words: rock; corrosion; performance characteristic; strength; water absorptivity; pore
EARTH AND ENVIRONMENT Vol. 40, No.2, Tot No.288, 2012, Page 255-260
