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Friday, May 31 • 9:30am - 9:45am
(Architecture) Impact of Mineralogy, Texture and Fabric of Sandstone Quarried in Canada on Deterioration of Central Park Structures

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The gray to tan-colored sandstone used for the construction of the Bethesda Terrace and several bridges and arches inside Central Park, NY, displays varying weathering behavior when exposed to the same environmental conditions. This group of sandstone often referred to as New Brunswick or Wallace sandstone comes from various quarries in Canada. The aim of this graduate thesis is to understand how different modes of decay observed on various structures relate to sandstone’s mineralogy, texture and fabric; and also decide if weathering is dependent on sandstone’s source and utilization. This research will be completed by April 2013.

Using polarizing light microscopy, X-ray diffraction and scanning electron microscopy, I will be fully characterizing the sandstone by determining its physical and mineralogical composition. This will allow me to compare and contrast between deteriorated, undeteriorated and new samples; see differences between sandstone from different quarries; and understand how a particular characteristic influences sandstone’s specific weathering behavior.

I will also be performing hygric dilation measurements to calculate stresses produced during wetting and drying cycles as well as degree to which samples swell, to understand swelling stress in magnitude to the plane and perpendicular to the bedding, and to evaluate swelling stress in different solvents.

avatar for Mayank I. Patel

Mayank I. Patel

Student, Columbia University

Friday May 31, 2013 9:30am - 9:45am EDT
JW Marriott 103-104 19 S West St Indianapolis, IN 46204

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