Creep which is a strain due to loading with no loss of moisture?

Explanation:

Creep is a time-dependent permanent (plastic) deformation under a certain applied load.

Creep deformation has three stages: 

i) Primary creep starts rapidly and slows down with time. 

ii) Secondary creep progresses at a relatively uniform rate. 

iii) Tertiary creep has an accelerated rate of deformation which terminates when the material fails (breaks or ruptures). 

In practice, drying shrinkage and viscoelastic behavior such as creep usually take place simultaneously.

Considering the various combination of loading, restaining, and humidity conditions, the following terms are defined:

1. True or Basic Creep: It is defined as the creep that occurs under conditions that there is no drying shrinkage or moisture movement between concrete and ambient environment.

2. Specific Creep: It is defined as a creep strain per unit of applied stress.

3. Drying Creep: It is the additional creep that occurs when the specimen under load is also drying.

4. Creep Coefficient: It is defined as the ratio of creep strain to the elastic coefficient.