Defined as inverse of the alterability of rocks. The alterability of rocks is as a dynamic concept which refers to the ability of a rock to alter with time. Under weathering, this time is said to be geologic while when referring to durability, it is said to be engineering time, in other words, referring to all phenomena that take place simultaneously though the life of rock monuments and engineering constructions containing stone. Durability is an important characteristic for controlling not only the stability of slopes, surface and underground excavations but also that of a great number of stone structures, buildings and monuments. The durability of a building stone can be defined as the measure of the ability of natural building stone to endure and maintain its essential and distinctive characteristics of strength, resistance to decay and appearance in relation to a specific manner, purpose and environment of use.
Published in Chapter:
Weathering Indices Used in Evaluation of the Weathering State of Rock Material
Sener Ceryan (Balikesir University, Turkey)
Copyright: © 2018
|Pages: 55
DOI: 10.4018/978-1-5225-2709-1.ch004
Abstract
There are various definition of weathering and differences between authors seem to steam in part from the different viewpoints of pedolog, geomorpholog, geolog, geochemists and geology engineer. In this study, weathering is handled from various aspects such as time, form and phases of progress, studies it is majored and research scale. The engineering behavior of rock materials depends not only on stress state and stress history but also on the physical, mineralogical and chemical change of the rock materials due to weathering. Weathering indices are used to define these changes due to weathering. Several weathering indices have been devised for quantifying the changes in the intrinsic properties of rocks from different points of view, some of which can be related to the engineering properties of weathered rocks. The most commonly used methods can be broadly categorized as chemical, mineralogical-petrographical, petro-chemical and engineering indices. In this study, the brief literature review for weathering indices used to evaluate of the effects for weathering of rock materials.