Maturity Method

Question 1

Why do we want to know the strength of concrete?

Answer 1

• Know when to strip the forms
• Know when to post tension.
• Know when to remove shores
• Know when to terminate cold-weather protection

Question 2

Other tests (than maturity test) to determine concrete strength?

Answer 2

field cured cylinders
pullout test
penetration testing

Question 3

What is the concrete strength maturity relationship?

Answer 3

• Strength increases as cement hydrates. Cement hydration depends on how long the concrete has cured and at what temperature.
• Maturity is measured of how far hydration has progressed.

Question 4

How does the maturity method predict concrete strength.

Answer 4

Predicts concrete strength based on temperature history of concrete.

Question 5

What is the maturity temperature-time factor M(t) equation?

Answer 5

M(t) = E(Ta - T0) delta t

 Ta= average concrete temperature during each time interval
 T0= temperature below which cement hydration is assumed to cease.
 delta t = time intervals, days or hours
 E= summation of all the intervals of time multiplied by temperature.