Apparatus and method for measuring workability of concrete
OwnerMatthew Tyler Ley, Mohammad Jobaer Uddin +1inventors
InventorsMatthew Tyler Ley, Mohammad Jobaer Uddin, Marllon Daniel Cook
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Abstract
Apparatus and method for characterizing concrete use measurements of vibration damping in the concrete to determine workability and describe the consistency of different batches of concrete as well as the behavior of concrete during consolidation. Accelerometers are used to measure vibration transmitted from a source of vibration within a sample to the outer surface of a container holding the sample. Curves of acceleration versus time measured by the accelerometers are correlated with the fresh property characteristics of the concrete.
Claims46
An apparatus for measuring workability of concrete, said apparatus comprising:
- a container adapted to receive a sample of said concrete;
- a vibrator adapted to be positioned within said container;
- a first vibration sensor mounted on said container, said first vibration sensor being positioned on an outer surface of said container, said first vibration sensor adapted to generate signals indicative of magnitude and frequency of vibration transmitted through said concrete.
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The apparatus according to claim 103, wherein said first and a second vibration sensors are mounted diametrically opposite to one another on an outer surface of said container.
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A method of measuring workability of fresh concrete, said method comprising:
- positioning a sample of said fresh concrete within said a container;
- applying vibration within said sample;
- measuring magnitude and frequency of vibration transmitted through said sample to said container;
- evaluating said magnitude and frequency of vibration to determine said workability of said fresh concrete.
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A method for comparing a consistency between a first batch of concrete and a second batch of concrete, said method comprising:
- positioning a first sample of said first batch within a first container;
- applying vibration within said first sample;
- measuring a magnitude of vibration transmitted through said first sample to said first container;
- positioning a second sample of said second batch within a second container;
- applying vibration within said second sample;
- measuring a magnitude of vibration transmitted through said second sample to said second container;
- comparing said magnitude of vibration transmitted through said first sample to said second container with said magnitude of vibration transmitted through said second sample to said second container.
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Dependencies are inferred from the claim text.