FINAL – CONCRETE INGREDIENTS & DESIGN (3)

What letter represents its correct placement on the graph.

air

What letter represents its correct placement on the graph.

fine aggregate

Choose the type of portland cement:

large piers 

Choose the type of portland cement:

sidewalks 

Choose the type of portland cement:

prestressed concrete plants 

Choose the type of portland cement:

where soil or water has high alkali content 

Choose the type of portland cement:

reservoirs 

Choose the type of portland cement:

drainage structures 

Choose the type of portland cement:

cold weather construction

Concrete is a mixture of ________ and ________.

The right concrete mixture combines the desired workability of the fresh concrete with the required ________ and ________ of the hardened concrete.

The concrete is ________ during placement, compacting the concrete within the forms.

When the concrete ingredients are combined, the paste surrounds every particle of ________.

Which of the following aggregate shapes works best for concrete?

Fine aggregates range in size from very fine up to one-fourth inch.

Fine aggregates generally consist of natural sand or crushed stone.

Which of the following is a characteristic of workable fresh concrete?

Which of the following is a characteristic of an economical concrete mix?

________ are determined.

________ are mixed to determine optimum mix design.

Maximum coarse ________ size is a concrete-mix design factor determined to meet job requirements.

Range of ________ is a concrete-mix design factor determined to meet job requirements.

Maximum course aggregate size should NOT exceed ________ of the clear space between reinforcing bars or between reinforcement bars and forms.

What is the main benefit of air-entrained concrete?

The amount of air in air-entrained concrete is

Mix containing a low proportion of cement

Which of the following is an insulating type of concrete made with aggregates of expanded materials such as perlite or vermiculite?

Which of the following types of concrete is made with aggregates such as barite, ferrophosphorous, goethite, hematite, ilmenite, limonite, magnetite, steel punchings, and steel shots?

Lightweight, group II concrete is used in making light but strong structural members such as those needed in high rise buildings.

Lightweight, group I concrete is used for insulating members such as roofs, fire walls, and conduit linings.

Mixing requirements for truck mixers are for ________ to ________ revolutions at mixing speed designated by the mixer manufacturer.

Accelerating admixtures are used during ________ weather to speed up the setting process and early strength development.

Plasticizers/superplasticizers are used to greatly reduce the amount of mix water needed and to increase ________.

Specialty admixtures are used for specific functions, such as to reduce ALL BUT WHICH of the following:

Specifications and standards become legally binding when a government body requires them and when they are cited in bidding documents, contracts, or other documents.

Factors related to concrete in specifications can include required slump, finishes, types and methods of curing, and tests.

Specifications can identify how to determine whether the requirements are satisfied.

A not-for-profit source of voluntary, standardized sampling and testing procedures for concrete is:

Which of the following is NOT an ASTM sampling and testing procedure for hardened concrete?

The first layer of soil is called

Structural failure is a consequence of building on a soil that has not been properly compacted.

Cracked pavement is a consequence of building on a soil that has not been properly compacted.

To dispose of fill material is a primary goal of compacting.

To decrease moisture in the soil is a primary goal of compacting.

A primary goal of compacting is to decrease concrete needed for job.

The degree to which a soil can be compacted is affected by the amount of moisture in the soil.

The degree to which a soil can be compacted is affected by the type of equipment being used.

Soils vary in their capacity to be

An effect of moisture on soil compaction, water in the soil

This method of soil compaction uses the weight of a heavy machine to press soil particles together.

Combines vibration and a kneading action to compact large areas of cohesive or mixed soils.

Powered by gas, diesel, electricity, or air, comes with different shoe sizes, suitable for any compactible soil.

Results of the test are expressed as a percentage that may be more than 100 percent.

This test measures soil moisture and soil density.

A microprocessor converts the data and displays it.