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Materials II Final
Definitions for Materials 2
31
Civil Engineering
Undergraduate 3
05/04/2011

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Cards

Term
Strength of Materials
Definition
Approach involving stress and strength
Term
Fracture Mechanics
Definition
Approach using stress, flaw, and toughness.
Term
Ingliss
Definition
solved crack ellipses in 1913
Term
K1
Definition
Non material property
Term
K1C
Definition
Material Property
Term
Brittle Materials
Definition
Little deformation
Term
Ductile Materials
Definition
Exhibit substantial deformation
Term
Matrix
Definition
continuous phase
Term
Reinforcement
Definition
dispersed phase
Term
Three Toughening Mechanisms
Definition

1. Increase Toughness

2. Reduce Flaw Size

3. Prestress

Term
Why grind cement finer?
Definition
To make it react faster, as it increases surface area
Term
Gel Pores
Definition
not related to W/C
Term
Capillery Pores
Definition
Related to W/C
Term
Chemical Reactions when cement combines with water?
Definition

  1. 2C3S + 6H --> C3S2H3 + 3CH
  2. 2C2S + 4H --> C3S2H3 +CH

Term
How do the equations change if silica fume is added?
Definition
silica fume reacts with calcium hydroxide
Term
Fat Mortar
Definition
more plastic and forgiving mortar
Term
Water Reducing Admixture
Definition
  1. lower water content
  2. higher slump
  3. lower cement content
Term
Lower Water Content
Definition
Improves Performance
Term
Higher Slump
Definition
Easier to work with
Term
Lower Cement Content
Definition
Saves Money
Term
Primary Property of a Glaze
Definition
Low coefficient of thermal expansion
Term
Air Entrainment
Definition
Provides cohesion and reduces amount of cement
Term
Silica Fume
Definition
by-product of reducing high purity quartz with coal in an electric furnace
Term
Slag
Definition
by-product of iron blast furnace
Term
Water Reducer
Definition

Admixture that disperses flocculated chemical particles through electrostatic repulsion.

 

Improves workability, decreses water demand

Term
Key factor(s) needed for curing
Definition

  1. Time
  2. Temperature
  3. Moisture

Term
Loading Rate
Definition
Provides standard in testing
Term
Way(s) to make concrete structure more resilient to steel corrosion
Definition

  1. coat with corrosion resistant material
  2. decrease w/c ratio
  3. cover depth

Term
Electrostatic Properties
Definition
measured to quantify how corrosion affects different types of concretes
Term
Voight Method
Definition
Parallel Alignment
Term
Reuss Method
Definition
Perpendicular
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