Instructions for the Use of the Petrographics Standards Table

Description of Investigation 2B: Determining the Composition of Building Materials
The objective of this exercise is to become familiar with common building materials in terms of the materials of which they are composed
By the end of the investigation you should be able to:
1.	Improve your ability to determine the identity of an unknown material based on its optical properties
2.	To visually estimate the percentage of various materials present within a building material

ASSIGNMENT INSTRUCTIONS
1.	DO NOT attempt this assignment until Assignment 2A has been completed, AND you have obtained the corrected property sheets for the 10 common components introduced in Assignment 2A.
2.	Print THREE copies of the "Petrographic Report Form". To link to this printable form...
3.	Document the composition of THREE building materials from Central Brooklyn High School. Your documentation must include a list of materials present and their abundance expressed as a percentage of the total. Tabulate your results on the "Petrographic Report Forms" that you printed. The three building materials that you must analyze depend upon your SSN and are specified below:
	If your SSN ends in 0 or 1	WING #1: Fireproofing FP1, Ceiling Tile CT1, Floor Tile FT1
	If your SSN ends in 2 or 3	WING #1: Fireproofing FP2, Ceiling Tile CT1, Floor Tile FT2
	If your SSN ends in 4 or 5	WING #1: Fireproofing FP3, Ceiling Tile CT3, Floor Tile FT3
	If your SSN ends in 6 or 7	WING #2: Insulation INS1 Ceiling Tile CT4, Floor Tile FT4
	If your SSN ends in 8 or 9	WING #2: Insulation INS2 Ceiling Tile CT5, Floor Tile FT5