COSC 253 – Concrete || All Answers Are Correct 100%.
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Course
COSC 253 – Concrete
Institution
COSC 253 – Concrete
MasterFormat correct answers The organizational standard for specifications (the Written instructions for construction)
Which Division is Concrete? correct answers 03
CSI correct answers The Construction Specifications Institute
Why is concrete beneficial? correct answers 1. Does not burn ...
COSC 253 – Concrete || All Answers Are Correct 100%.
MasterFormat correct answers The organizational standard for specifications (the Written
instructions for construction)
Which Division is Concrete? correct answers 03
CSI correct answers The Construction Specifications Institute
Why is concrete beneficial? correct answers 1. Does not burn (if a concrete place caught on fire,
it gives enough time for people to evacuate)
2. Can be used for many purposes
3. Exterior finish = interior finish
4. Great Compression Strength
5. 50+ Building Life
Fire Rating correct answers How fireproof a building is
What is the term used when steel is embedded in the concrete? correct answers Reinforced
Concrete
What does steel do? correct answers It helps with tensile strength so it makes concrete stronger
*Steel and Concrete is monolithic combination that's really strong*
How does the aggregate hold together? What is this process called? correct answers When
concrete cures, it gives off heat and forms bonds that hold the aggregate together. This process is
called Heat of Hydration.
How is concrete formed? correct answers When portland cement creates a paste with water that
binds with sand and rock to harden.
What are the 5 elements that make up concrete correct answers 1. 6% Air
2. 11% Portland Cement
3. 41% Gravel or Crushed Stone (Coarse Aggregate)
4. 26% Sand (Fine Aggregate)
5. 16% water
Concrete is great with compression but sucks with ___________. correct answers tension
Process of Portland Cement correct answers 1. Made of Pulverized Lime, Silica, Alumina, and
Iron
2. Mix Limestone with Clay, Shale or Slag
3. Heat Mixture 2700 F
4. Fuse Mixture to make Clinker (.75" Rocks)
5. Clinker Pulverized with Gypsum
6. Powdery substance created
, Is Concrete recyclable? if so how? correct answers Yes, one breaks down the concrete and take
the reinforcement bars out.
ASTM correct answers American Society for Testing and Materials
Concrete must form to ASTM standards, what does that mean? correct answers ASTM
establishes standard specifications for commonly used materials of construction. Referred to by
number. EX: ASTM C150
ASTM C150 correct answers (Most Common)- Portland Cement: Types I, II, III, IV, V
What does still air act as in construction? correct answers insulator
What does "A" represent after TYPE? correct answers Air entraining
The primary use of air-entraining concrete is for_____________. correct answers Thermal
Resistance - tiny air pockets that relieve internal pressure.
Bioconcrete correct answers concrete that heals itself
How does Bioconcrete work? correct answers A bacteria that can survive the living conditions of
concrete, and produce chemicals to heal the concrete, is placed in the concrete and if the concrete
cracks and water gets in, the bacteria reacts and turns into limestone.
Types of Portland Cement: Type I correct answers Normal - everyday concrete, sidewalk, etc.
Types of Portland Cement: Type II correct answers Moderate - a little better than normal.
Types of Portland Cement: Type III correct answers High Early Strength - 28 days you heat
maximum concrete - concrete delays construction time.
Types of Portland Cement: Type IV correct answers Low Heat - when low heat of hydration is
required
Types of Portland Cement: Type V correct answers Sulfate Resisting - acid rain resistance
Reinforcement bars are based on _____. Every increment represents _____. correct answers 1/8"
What is Concrete grade beam? correct answers It consists of a reinforced concrete beam that
transmits the load from a bearing wall into spaced foundations such as pile caps or caissons.
slab on grade correct answers this is a slab on grade.
grades depend on the kind of soil.
In Texas we don't have basements because we use slab on grades because of the kind of soil we
have.
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