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https://www.qualityengineersguide.com/what-is-the-allowed-time-for-the-concrete-discharge
Dec 08, 2017 · There is always confusion on site about the required time for the discharge of concrete. Some say it is 60 minutes, 90 minutes, 120 minutes, etc.
https://www.concretenetwork.com/concrete-history/
This is an interactive timeline covering the history of cement and concrete. It spans over 5,000 years, from the time of the Egyptian Pyramids to present day decorative concrete developments. Concrete has been used for many amazing things throughout history, including architecture, infrastructure and more.
https://www.concreteconstruction.net/concrete-production-precast/how-long-can-a-ready-mix-truck-wait_o
Oct 27, 2010 · The document states that discharge of the concrete shall be completed within 1 ½ hours after the introduction of the mixing water to the cement and aggregates, or the introduction of the cement to the aggregates.
https://link.springer.com/article/10.1007%2FBF02473057
May 01, 1988 · The effect of curing period and of delay in carrying out curing by the wet burlap method on some properties of concrete with different mix proportions (cement content, water content) in hot weather was studied. The results show that a minimum of 3 days curing was sufficient for rich mixes, while a longer period was required for leaner mixes (min. 7 days). The delay of curing had a harmful ...Author: Samir H. Al-Ani, Mokdad A. K. Al-Zaiwary
https://www.lrrb.org/media/news-events/2.5TSExample_201126TS.pdf
Finally, researchers conducted a statistical analysis of data from laboratory, control plant and regional testing to determine how the performances of concrete mixtures was affected both by their ingredients and by extending their delivery time from 60 to 120 minutes.
https://theconstructor.org/concrete/effect-of-transit-time-on-ready-mix-concrete/8754/
In order to control loss of workability and setting of concrete, the concrete should be delivered completely to the site of work within one and half hours (when the atmospheric temperature is above 20 0 C) and within two hours ( when the atmospheric temperature is at or below 20 0 C)of adding the mixing water to the dry mix of cement and aggregate or adding the cement to the aggregate whichever is earlier.
https://ttlc.intuit.com/community/tax-credits-deductions/discussion/what-is-the-depreciation-period-for-a-new-concrete-pad-to-park-business-trailers-and-van-at-home/00/660002
Jun 06, 2019 · Per IRS Publication 946 - IRS.gov How To Depreciate Property • Section 179 Deduction • Special Depreciation Allowance • MACRS • Listed..., it would generally be 15-year property.
https://www.nrmca.org/sustainability/CSR04%20-%20Life%20Cycle%20Assessment%20of%20Concrete%20Buildings.pdf
Concrete has a long service life, thereby increasing the period between reconstruc-tion, repair and main-tenance and associ-ated environmental impacts. Because concrete is light in color it can help minimize the urban heat island effect when used as pave-ment for parking ar-eas and plazas or for exterior cladding. Most importantly,File Size: 472KB
https://www.ascconline.org/Portals/0/docs/POSITION-STATEMENTS/PS-32-concrete-discharge-time-requirements.pdf
Concrete Discharge Time Requirements ASCC Position Statement #32 Project specifications, including those that cite ACI 301, “Specifications for Structural Concrete,” and ASTM C94, “Specification for Ready-Mixed Concrete,” state time limits for the discharge of concrete. ASTM C94 states that dis-charge of the concrete shall be completed ...File Size: 243KB
https://www.quora.com/What-is-the-life-expectancy-of-concrete-specifically-in-Mediterranean-apartment-buildings-of-the-1970s
Apr 03, 2017 · For instance, the life expectancy of residential buildings is about 50 years. During that period of time, the structure can be thought to be still able to stand properly, and at the same time justify the monetary investiment that goes in to it. Things may change when it comes to other type of structures, such as roads, bridges, or dams.
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