Material Standards Flashcards
Name some of the activities covered by the material standards.
-Construction
-Nanotechnology
-Energy management
-Health and safety
What forms can material standards come in?
-Guides
-Codes of practise
-Specifications
-Supporting documents
What are prescriptive standards?
-Specify ingredients and recipes
-If a material is made as specified it is assumed to be okay
-Need to build in safety margins to be conservative
What are performance-based standards?
-Define what a material needs to do, including how to test
-Allow the producer to design a material to meet these requirements
-More scope for innovation, but it takes a lot more work to prove the sufficient performance
What speciality products tend to have purpose-written standards?
-Roof tiles
-Masonry blocks
-Paving slabs
-Tile grout
What is the structure of European standards of concrete?
-Family tree of standards
-Strong cement/concrete industry influence in drafting
-Cascading set of requirements for materials to be used in concrete
-Many testing methods are integrated into material standards
What is the composition of CEM I Portland cement?
> 95% Portland clinker
What is the composition of CEM II Portland-composite cement?
65-94% Portland + 1 pozz./limestone
What is the composition of CEM III Blast furnace cement?
5-64% Portland + slag
What is the composition of CEM IV Pozzolanic cement?
45-89% Portland + 1 pozzolana
What is the composition of CEM V Composite cement?
20-64% Portland + slag + 1 other SCM
What is ASTM C150?
Portland cement
What is ASTM C595?
Blended hydraulic cements
What is ASTM C1157?
Standard performance specification for hydraulic cement
