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

Determine stability of the upstream slope of an earth dam, Stability of the...

Stability of the upstream slope of an earth dam Give the step by step procedure for examining the stability of the upstream slope of an earth dam by the Swedish method of slice

Laplace transform, Using Laplace transfom, the following differential equat...

Using Laplace transfom, the following differential equation d y dy dt reduces to the algebraic equation of the form Resolve y(s) into partial fractions

Sinle flumesh bound.., ADVANTAGES AND DISADVANTAGES OF SINGLE FLUMESH BO...

ADVANTAGES AND DISADVANTAGES OF SINGLE FLUMESH BOUND

Show the excessive movement joints in bridges, Q. Show the Excessive moveme...

Q. Show the Excessive movement joints in bridges? Movement joints are generally added to bridge structures to accommodate movements because of dimensional changes arising from

Strength of materials, #questionwhat is the shear force and bending moment....

#questionwhat is the shear force and bending moment..

Surveying land, principle of working from whole to part

principle of working from whole to part

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