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https://www.qualityengineersguide.com/what-is-the-allowed-time-for-the-concrete-discharge#:~:text=In%20ASTM%20C94%2C%20it%20says%20that%20%E2%80%9CDischarge%20of,the%20mixing%20water%20to%20the%20cement%20and%20aggregates.%E2%80%9D
https://www.qualityengineersguide.com/what-is-the-allowed-time-for-the-concrete-discharge
Well in my experience as a QA/QC engineer I have read several standard on concrete.one of the most like standard is Australian standard of opc concrete expiring time.it indicates if the temprature of concrete is between 32c -35c then the elapsing time will be 45minute only.and if it is 32c then it will me 90minute and if it is between 28c -23c then it will …
https://www.concreteconstruction.net/_view-object?id=00000153-8b55-dbf3-a177-9f7dbe320000
One Ge n e r al Fo re m a n 2 hours @ $3.94—$ 7.88 One Fo r eman 8 hours @ $3.69—$ 29.52 Fi v e Carpenters 8 hours @ $3.44—$137.60 Two Laborers 8 hours @ $1.95—$ 31.20 One Truck Dri v er 4 hours @ $2.03—$ 8.12 Total for 60 hours $ 2 1 4 . …
https://theconstructor.org/concrete/concrete-curing-time-duration/11119/
The curing of concrete for longer duration increases the strength and durability of concrete structural members. However, after 28 days of the casting of a concrete, 99% of the hydration process of the concrete is completed. Further to which continuation of curing is of no use. 5.
https://www.theprojectestimate.com/concrete-work-productivity-rate/
AVE. OUTPUT - HOURS / UNIT; LABOR: EQUIPMENT: UNIT: 1: Square Columns, @ 4.2 m high: 300mm x 300mm (max) Incld. forms & rebar: Cubic Meters: 1.000 10.00 4.000 0.250 1.000 0.375 0.125 0.500 0.125 4.000: Foreman Carpenter &Steelman Mason Laborer Equipt. Opt. Concrete Vibrator Concrete Pump & Trans Mixer Crane Truck Power Tools: 50.56: 15.94: Hr / …
https://scetcivil.weebly.com/uploads/5/3/9/5/5395830/batching_mixing_transporting_handling_concrete.pdf
discharge of the concrete at the job site; this time is 1. 1 ⁄ 2. hours or before the drum has revolved 300 times after introduction of water to the cement and aggregates or the cement to the aggregates. Mixers and agitators should always be operated within the limits for volume and speed of rotation designated by the equipment manufacturer. 181. Chapter 10
https://www.quora.com/What-happened-if-we-start-curing-of-concrete-after-12-hours-of-casting
From experience, 8 hours is reasonable for temperatures up to 25 for normal cement concrete. To put things in perspective, the most important factors in regards of ambient environment are temperature and moisture. Higher temperatures need earlier curing, and the …
https://www.quora.com/Why-curing-of-fresh-concrete-starts-after-24-hrs-from-casting
The best practice is to cure the concrete shortly after the chemical reaction has started that hardens the concrete. Concrete should not be allowed to dry fast in any situation, and the curing conditions must be maintained during the first 24 hours or at least until the final setting time of cement has passed. END.
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