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[2] ASTM C 191, "Standard Test Method for Time of Setting of Hydraulic Cement by Vicat Needle", ASTM, US, 2000.
[3] ASTM C 403 "Standard Test Method for Time of Setting of Concrete Mixtures by Penetration Resistance", ASTM, US, 2000.
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[9] ASTM C 33-03, "Standard Specification for Concrete Aggregates", ASTM, US, 2003.
[10] ACI 211.1-91, "Standard Practice for Selecting Proportions for Normal, Heavyweight, and Mass Concrete", ACI Manual of Concrete Practice, ACI, USA, 2002.
[11] BS 1881: Part 203, "Measurement of Velocity of Ultrasonic Pulses in Concrete", BSI, UK, 1986.
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[14] Neville, A. M., "Properties of Concrete", 4th Edition, John Wiley and Sons, Inc., New York, 1996.
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