Psad Flashcards
It is the process of bringing earthwork to the desired shape and elevation
Grading
It is the process of giving a chiral soils and off abrasive resistance and shear strength to accommodate traffic or design loads
Soil stabilization
It is the process of bringing each roadway layer to its final grade
Trimmings
It is the process of increasing the density of a soil by mechanically forcing the soil particles closer together there by expelling the air from the void spaces in the soil
Compaction
It is the process of increasing the density of a cohesive soil from the expulsion of water from the soil void spaces
Consolidation
Complete or partial dismantling of a building or structure by pre-planned & control methods or procedures
Demolition
The action of flattening poured concrete into a smooth flat layer prior to finishing the surface
Screeding
It is the bringing of a concrete surface to true grade with enough mortar to produce the desired finish
Leveling
It is the measure of the materials ability to resist indentation or penetration
Hardness
It is the ability of a material to deform in the plastic range without breakage or or the ability to undergo considerable plastic deformation under tensile load before actual rapture
Ductility
It is the ability of a material to absorb energy before fracture takes place
Toughness
It is the ability of a material to recover its shape and size after deformation
Resilience
When material has to support a load for a long period of time what causes it to continue to deform until a sudden fracture occurs?
Creep
When a material is subjected to repeated cycles of stress or strain what causes its structure to breakdown ultimately leading to fracture
Fatigue
It is the point where the object suffers note or by the effect of the gravitational force acted upon it
Center of gravity
It is point through which the resultant of the resistance to the applied lateral force acts
Center of rigidity
It is point through which the applied seismic force acts
Center of mass
It is the distance between the center of rigidity and center of mass
Eccentricity
It is the displacement of 1 level relative to the level above or below
Story drift
Lateral displacement of the story relative to the base
Story displacement
A measure of energy released in an earthquake
Magnitude
A measure of strength of shaking during earthquake
Intensity
It is the point deep below the earth’s surface where the earthquake originated
Hypocenter
It is the point on earth’s surface directly above the focus
Epicenter
A device used to anchor tendons on prestressed concrete members
Anchorage
It is a branch of mechanics which studies the effects and distributions of forces of rigid bodies which are and remain at rest
Statics
If two forces are in equilibrium they are ___________
Equal, collinear, and oppositely directed
A contact resistance by one body when the second body moves or tends to move past the first body
Friction
The friction force always acts__________
Opposite to the motion or to the tendency to move
The branch of mechanics that deals with bodies in motion
Dynamics
The term is used to define the motion of a particle or body without consideration of the forces causing the motion
Kinematics
The branch of mechanics that relates the force acting on the body to its mass and acceleration
Kinetics
A body at rest will remain to be at rest or in motion will be remain in motion along a straight path unless acted upon by an unbalanced force
Newton first law of motion
A particle acted upon by an unbalanced force system has an acceleration in line with and directly proportional to the resultant of the four system and inversely proportional to its mass
Newton’s second law of motion
In every action there is always an equal and opposite reaction
Newton’s third law of motion
The motion of a rigid body in which a straight line passing through any two of its particle always remain to be parallel to its initial position
Translation
The motion of a rigid body in which the particles move in circular paths with their centers on a fixed straight line called the axis of rotation
Rotation
The motion of a rigid body in which all particles in the body remain at a constant distance from a fixed reference plane
Plane motion
Mixture of sand, gravels and other aggregates and held together in a rock line mass with paste of cement and water
Concrete
This test is used to test the workability of the concrete
Slump test
It is performed by submerging the specimen underwater this is done in order to prevent moisture loss
Curing
