30 Questions
Which test is used for concrete that is too fluid to be measured using the standard slump test?
The flow table test
What is the purpose of the concrete slump test?
To check the workability of fresh concrete
What is the shape of the metal mould used in the slump test?
Conical frustum
What is the diameter of the top of the slump cone?
100 millimetres
How many times is each layer of fresh concrete tamped during the slump test?
25 times
What is the height of the slump cone used in the test?
305 millimetres
What is the purpose of the flow table test?
To determine the water content of fresh concrete
What is the diameter of the bottom of the slump cone?
200 millimetres
What is the tool used in the slump test made of?
Metal
How is the concrete struck off at the end of the slump test?
It is struck off flush with the top of the mould
Which of the following is NOT a term used to describe the profile of slumped concrete?
Slump cone
What does a collapse slump indicate about the concrete mix?
The mix is too wet
What is the range of slump for very dry mixes typically used in constructing pavements or roads?
0 - 25 mm
What is the range of slump for low workability mixes typically used for foundations with light reinforcement?
10 - 40 mm
What is the range of slump for medium workability mixes typically used for normal reinforced concrete placed with vibration?
50 - 90 mm
What is the range of slump for high workability concrete typically used where reinforcing has tight spacing?
100 mm
What is the range of slump where the slump test fails to determine the difference in workability in stiff mixes?
5 - 260 mm
What is the limitation of the slump test in determining workability for wet mixes?
The test gives a collapse slump
What is the maximum size of aggregates that the slump test is suitable for?
Less than 38 mm
What is the height of the slump cone specified in the United Kingdom standards?
12-in (300 mm)
Which standard replaced the British slump test (BS 1881–102)?
BS EN 12350–2
How many times should the mixture be tamped down for each layer in the slump test?
25 times
Which test uses a flow table and measures the diameter of the sample?
Flow table test (DIN 1048–1)
Which test evaluates consistency using a Vebe consistometer?
Vebe consistometer (ASTM C1170)
Which automated device can measure and display slump in concrete?
Automated slump meter
Which standard code revised in 2013 allows water additions during transit for trucks equipped with automated slump monitoring and measurement systems?
ASTM C94/C94M
Which test uses an automated slump meter that can add water to the concrete mix in the delivery truck while in transit?
Verifi
Which test evaluates slump using a British compacting factor test?
British compacting factor test
Which test measures the flow of freshly mixed hydraulic cement concrete?
K-Slump Test (ASTM International C1362-09)
Which test uses sensors and controls to measure and display slump?
Automated slump meter
Test your knowledge on the concrete slump test, a crucial measure of the consistency and workability of fresh concrete. Learn about its significance in ensuring uniformity and identifying improperly mixed batches.
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