Ads
related to: concrete creep and shrinkage repair servicesproducts.bestreviews.com has been visited by 1M+ users in the past month
topdealweb.com has been visited by 100K+ users in the past month
Search results
Results from the WOW.Com Content Network
In practice, creep during drying is inseparable from shrinkage. The rate of creep increases with the rate of change of pore humidity (i.e., relative vapor pressure in the pores). For small specimen thickness, the creep during drying greatly exceeds the sum of the drying shrinkage at no load and the creep of a loaded sealed specimen (Fig. 1 bottom).
CTLGroup provides highly specialized creep and shrinkage testing for supertall buildings. As construction projects rise above 984 feet, which is the minimum for supertall classification, precise calculations for creep and shrinkage become absolutely crucial.
The creep of concrete, which originates from the calcium silicate hydrates (C-S-H) in the hardened Portland cement paste (which is the binder of mineral aggregates), is fundamentally different from the creep of metals as well as polymers. Unlike the creep of metals, it occurs at all stress levels and, within the service stress range, is ...
Concrete has a very low coefficient of thermal expansion, and as it matures concrete shrinks. All concrete structures will crack to some extent, due to shrinkage and tension. Concrete which is subjected to long-duration forces is prone to creep. The density of concrete varies, but is around 2,400 kilograms per cubic metre (150 lb/cu ft). [1]
Repair principles which do not improve the strength or performance of concrete beyond its original (undamaged) condition include replacement and restoration of concrete after spalling and delamination; strengthening to restore structural load-bearing capacity; and increasing resistance to physical or mechanical attack.
The concrete can develop high compressive and tensile strengths, while shrinkage and creep remain acceptable, but will generally be less rigid than conventional mixes. The most obvious advantage is the low density, but these concretes also have low permeability to water and greater thermal insulation.
Ads
related to: concrete creep and shrinkage repair servicesproducts.bestreviews.com has been visited by 1M+ users in the past month
topdealweb.com has been visited by 100K+ users in the past month