Concrete Field Testing Technician I| 80 Questions| Correct Answers| 100% Verified.

ACI - ANSWER American Concrete Institution C1064 - ANSWER Standard Test Method for Temperature of freshly mixed Hydraulic-Cement Concrete C172 - ANSWER Standard practice for sampling freshly mixed concrete C143 - ANSWER Standard test method for slump of hydraulic - cement concrete C138 - ANSWER Standard test method for Density (Unit Weight), Yield and Air Content (Gravimetric) of Concrete C231 - ANSWER Standard test method for Air Content of Freshly Mixed Concrete by the Pressure Method C173 - ANSWER Standard Test Method for Air Content of Freshly Mixed Concrete by the Volumetric Method C31 - ANSWER Standard practice for Making and Curing Concrete Test Specimens in the Field Most important factor when dealing with Concrete - ANSWER Temperature C1064 (Slope) - ANSWER Covers the determination of Temperature of Freshly Mixed Hydraulic-Cement Concrete C1064 (Significance & Use) - ANSWER Provides a means for measuring the temperature of Freshly Mixed Concrete. The measured temperature represents the temperature at the time of testing and may not be an indication of the temperature of the freshly mix concrete at a latter time. It may be used to verify conformance to a specified requirement for temperature of concrete. C1064 (Significance & Use) - ANSWER Concrete containing aggregate of a nominal maximum size greater than 75 mm [3"] may require up to 20 minutes for the transfer of heat from aggregate to mortar. C1064 (Container) - ANSWER Shall be large enough to provide at least 75 mm [3"] of concrete in all directions around the center of the temperature measuring device; concrete cover must also be at least three times the nominal maximum size of the course aggregate C1064 (Temperature Measuring Device) - ANSWER Shall be capable of accurately measuring the temperature of the Freshly Mixed Concrete to +/- 0.5°C [+/- 1°F] throughout a range of 0° to 50°C [30° to 120°F]. Design of the temperature measuring device shall be such that it allows 75 mm [3 in.] or more immersion during operation. Partial Immersion liquid-in-glass thermometers shall... - ANSWER have a permanent mark to which the device must be immersed without applying a correction factor C10