Tilt-Up Concrete Test new update 2024 answered 100%

Tilt-Up Concrete Test new update 2024 answered 100% List the five steps to a successful tilt-up project. - Answer ️️ -1. Design 2. Planning 3. Construction 4. Erection 5. Creating Finishes Select three disadvantages of tilt-up construction - Answer ️️ -available space to cast panels weight of panels on certain soils availability of lifting equipment temporary bracing during construction Define tilt-up. - Answer ️️ -Tilt up concrete is the technique of site casting concrete wall panels on a horizontal surface and then lifting or tilting them into place. Who is known as the father of tilt-up? - Answer ️️ -Robert Aiken Cold weather is defined as a period when the average daily temperature 5ºC (40ºF) for 3 successive days and the temperature stays 10ºC (50ºF) for more than ½ of any 24 hour period. - Answer ️️ -True Concrete will freeze if the temperature falls below -4ºC (25ºF). - Answer ️️ -True What temperature range within the concrete (from the surface to the center) should be maintained to avoid cracking? - Answer ️️ -35ºF Recommended concrete temperature at the time of placement of a concrete element 10-inches in thickness is _________. - Answer ️️ -55ºF Concrete should be placed at the lowest practical slump. - Answer ️️ -True What are F-Numbers (FF and FL)? - Answer ️️ -FF = Flatness : controls local surface bumpiness by limiting the magnitude of successive 1 ft. slope changes. FL = Levelness : limits differences in departures from design grade over distances of 10 ft. (measure of floor pitch) F numbers are a standard of specification and measurement of the flatness and levelness of concrete floors. What was wrong with the old "straightedge" specs? - Answer ️️ -They were unrealistic, unscientific, and not repeatable to use. There was a disagreement as to what they meant. How are F-Numbers better than the straight edge method? - Answer ️️ -Using F-numbers are better than the straight edge method because they are easier to identify and manage the floors features for it to qualify as good. What F-Number approximately equals 1/8th inch in 10 feet? - Answer ️️ -FF50 is about equal to 1/8" for 10' What is difficult about meeting an FF 50? - Answer ️️ -Meeting an FF 50 of flatness is considered very flat or almost super flat meaning 1/8" needs to be met every 10' How are F-numbers measured? - Answer ️️ -Flatness is measured by the difference in slope over 2' and levelness is measured by the difference in elevation by more than 10' What is a Superflat floor? - Answer ️️ -Specified overall flatness = 60 Specified overall levelness = 40 What FF and FL number would you recommend for a tilt-up project (remember the slab-on- grade is your forming surface for your panels)? - Answer ️️ -I would say either flat or very flat due to these slabs will be standing upright supporting the structure. Therefore they need to be square and plumb. Additionally they are the finishes on the outside as well so everything needs to look straight and flat. grade - Answer ️️ -refers to a surface sand bed - Answer ️️ -a casting surface intended to set larger aggregate or stones in a random pattern resulting in uneven surfaces that would not otherwise be effective on a solid concrete slab slab-on-grade - Answer ️️ -a concrete slab cast on the ground surface subgrade - Answer ️️ -the surface below a slab or below a base base - Answer ️️ -a granular material placed directly below the slab reinforced slab - Answer ️️ -a concrete slab containing either WWF, reinforcing bars, or fiber How is the subgrade modulus determined? - Answer ️️ -It is determined by the soils engineer after performing a test at the site. The test meaures the load required to compress a 30" diameter steel plate 0.05" into the soil Subgrade modulus is __________________. - Answer ️️ -a measure of the resiliency or compressibility, of the s