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

Question.A , #q strain gauge arrangement is used to measuuestion..

#q strain gauge arrangement is used to measuuestion..

Explain the angle of wall friction, A retaining wall 4.5 m high with vertic...

A retaining wall 4.5 m high with vertical back supports a backfill with horizontal surface. The unit weight of the fill is 18 kN/m 3 and the angle of internal friction is 36°. The

How is skin friction and point resistance of a pile computed, Describe the ...

Describe the basic difference in the bearing capacity computation of shallow and deep foundations. How are skin frictions and point resistance of a pile computed?

Convert reduced bearings into whole circle bearings, Example: Convert t...

Example: Convert the following reduced bearings into whole circle bearings: (i) N 65° E                           (ii) S 43° 15′ E (iii) S 52° 30′ W           (iv)

IRC Class AA loading in existing industrial areas, For IRC Class AA loading...

For IRC Class AA loading in existing industrial areas, what is load (kN/m) has to applied base don the wheel loads. especially raft foundation & roads are at same level.

Slump test, why only frustum cone use in slump

why only frustum cone use in slump

Describe the consolidation settlement, Q. Describe the Consolidation Settle...

Q. Describe the Consolidation Settlement? The resulting settlements which are time-dependent and are termed consolidation settlements. After the consolidation settlements take

Tack rivet, tack rivet figures with connections

tack rivet figures with connections

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