Effect of concrete placing temperature, Civil Engineering

Assignment Help:

Effect of concrete placing temperature on early thermal movement

Rate of hydration of cement paste is related to placing temperature of concrete. Rate of heat production is given by empirical Rastrup function:

H=H0×2r (T-T1)

Ho = Rate of heat production at a reference temperature

T = Temperature where rate of heat production H

T1 = Temperature where rate of heat production Ho

r = 0.084

A 12o C increase in placing temperature doubles the rate of reaction of hydration. Henceforth concrete placed at a higher temperature experiences a higher rise in temperature. For example concrete placed at 32oC generates heat of hydration twice as fast when compared with concrete placing at 20oC. Therefore high concrete placing temperature has significant effect to problem of early thermal movement.


Related Discussions:- Effect of concrete placing temperature

Define diving equipments for underwater inspection of bridge, Define Diving...

Define Diving Equipments for Underwater Inspection of Bridge? Generally two types of diving, Scuba diving and surface supplied air diving, is employed in underwater inspection

Theory on the horizontal reactions of portal frames, Determine the horizont...

Determine the horizontal abutment reaction of a rectangular portal frame under increasing central concentrated load

Explain the geophysical methods, Why are undisturbed samples needed? Descri...

Why are undisturbed samples needed? Describe any one procedure of obtaining undisturbed samples for a multi-storeyed building project. For what purpose are geophysical methods u

Horizontal capability of pile bents, Question For classic pile bents in...

Question For classic pile bents in marine piers, how can vertical loads related to horizontal capability of pile bents? Answer At first consider a pile bent with a top

Effect of pile installation method, Effect of pile installation method to l...

Effect of pile installation method to load carrying capacity of piles The construction of piles by driving method causes an increase in density of surrounding soils. Therefore

Errors in leveling, what is the errors faced in leveling servey

what is the errors faced in leveling servey

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd