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WorksheetsMIDTERM-GROUPQZ-#1
Total questions: 35
Worksheet time: 27mins
The general term for sand is ____________
FINE AGGREGATE
SOIL AGGREGATE
COARSE AGGREGATE
CONCRETE
The general term for gravel is ____________
FINE AGGREGATE
SOIL AGGREGATE
COARSE AGGREGATE
CONCRETE
Aggregates generally occupy _________ % of the concrete volume
60 to 75
70 to 75
60 to 85
65 to 75
The proper selection of aggregates for use in concrete mixtures is critical to long term concrete performance.
Aggregates must be clean, soft, strong, and durable particles that are largely free of absorbed chemicals, coatings of clay, and other fine materials in amounts that could affect hydration and bond of the cement paste.
The process in which cement chemically reacts with water
(a)
Heat of Hydration is the (a) generated during the process of hydration
Cement when mixed with water is called (a) in concrete.
These are inert filler materials in concrete.
(a)
(a) refers to the ease with which freshly mixed concrete can be placed, compacted, and finished without segregation or excessive bleeding. It is a key property that affects the handling, placement, and overall quality of concrete structures.
Based from ASTM C294, Granite belongs to IGNEOUS ROCKS as Constituents for concrete aggregates.
Based from ASTM C294, SILICA belongs to IGNEOUS ROCKS as Constituents for concrete aggregates.
Based from ASTM C294, BASALT belongs to IGNEOUS ROCKS as Constituents for concrete aggregates.
Based from ASTM C294, LIMESTONE belongs to SEDIMENTARY ROCKS as Constituents for concrete aggregates.
Based from ASTM C294, SILICA belongs to MINERALS as Constituents for concrete aggregates.
Petrological Classification of Soils
Igneous rocks
Sedimentary rocks
Metamorphic rocks
Both A and B
Classification of Aggregates according to source :
NATURAL
MANUFACTURED
RECYCLED
MARINE DREDGED
Classification of Aggregates according to unit weight :
HEAVY WEIGHT
NORMAL WEIGHT
LIGHT WEIGHT
LIGHT HEAVY WEIGHT
Classification of Aggregates according to size :
FINE
COARSE
LIGHT COARSE
NONE OF THE ABOVE
Two concerns for marine dredged aggregate
SEASHELLS
SALT
LIGHT
HEAVY
(a) concrete is simply old concrete that has been crushed to produce aggregate.
(a) are formed by solidification of molten lava.
(a) are obtained by deposition of weathered & transported preexisting rocks or solutions.
(a) are formed under high heat & pressure alteration of either igneous & sedimentary rocks.
The type of strength in which concrete is strong.
(a)
What is the boundary is classifying aggregates according to size?
(a)
The mineral character of aggregate affects the strength, durability, elasticity of concrete.
The surface characteristics of aggregate affects the workability of fresh mass & the bond between the aggregate & cement paste in hardened concrete. If it is rough, workability decreases & bond decreases.
The grading of aggregate affects the workability, density & permeability.
The amount of aggregate in unit volume of concrete
Specific gravity of heavy weight aggregate is greater than
(a)
Specific gravity of normal weight aggregate is between ____ to ___.
(a)
Specific gravity of light weight aggregate is less than.
(a)
NORMAL WEIGHT AGGREGATE IS IN ACCORDANCE TO (a)
LIGHT WIEGHT AGGREGATE IS IN ACCORDANCE TO (a)
