Introduction to Classification of Rocks Using the Building Stones of the Brooklyn College Campus
ثبت نشده
چکیده
Igneous Rocks form from the solidification of molten rock. Intrusive igneous rocks are composed of crystals that are large enough to be seen with the naked eye because these rocks cooled slowly, deep within the Earth thereby allowing time for the crystals to grow. In contrast, extrusive (volcanic) igneous rocks cool very quickly after they erupt from a volcano, and so are composed of microscopic crystals. Most volcanic rocks make poor building stone because they may be weak, cracked, inconsistent in color, and/or contain large pores. Accordingly, volcanic rocks will not be discussed further in this lab.
منابع مشابه
بررسی پرتوهای گاما در سنگهای ساختمانی موجود در شهر کرمان، سال 1392
Abstract Introduction:Some of the building stones have radioactive elements such as uranium and thorium and since people spend averagely 80 % of their time within the buildings, it increases the possibility of sunshine exposure. The aim of this study was to evaluate the dosimetry of building stones in Kerman in 2013 to determine the radioactivity of them. Methods: From the salestones of Kerman,...
متن کاملAlteration dependent physical-mechanical properties of quartz-diorite building stones
The microscopic and geomechanical properties of igneous building stones include the level of alteration, presence of micro cracks, peak strength, porosity, proportion of detrimental minerals, etc. Porosity is reportedly of a devastating impact on the peak strength of igneous rocks. The quartz diorite rock samples in this study were selected from five quarries in Natanz, Iran and subject to micr...
متن کاملEstimating the Mechanical Properties of Travertine Building Stones Due to Salt Crystallization Using Multivariate Regression Analysis
Salt crystallization is one of the most powerful weathering agents that may cause a rapid change in the mechanical properties of stones, and thus limit their durability. Consequently, determining the mechanical properties of stones due to salt crystallization is important for natural building stones used in marine environmental and mild climatic conditions, which expose excessive salt crys...
متن کاملEstimating the durability of building stones against Salt crystallization: considering the physical properties and strength characteristics
Salt crystallization is one of the most important weathering agents and may limit the durability of building stones. Salt crystallization induces stresses inside the pores of stones. Consequently, stone durability is closely related to its physical properties and strength. The purpose of this study was to propose a statistical model for estimating stone durability against salt crystallization c...
متن کاملAn Investigation of the Effect of Freezing on Strength and Durability of Dimension Stones Using Fuzzy Clustering Technique and Statistical Analysis
Western and North-Western regions of Iran feature very cold winters, a lot of snow, and freezing temperatures during most nights in December, January, February, and March. This directly influences the selection and applications of dimension stones in these areas. Freezing influences both mechanical and physical properties of rocks. Therefore, measuring the changes in values of these parameters ...
متن کامل