ACI 209.2R-08 PDF Download

ACI 209.2R-08 is a guide that focuses on modeling and calculating shrinkage and creep in hardened concrete. Its purpose is to provide a prediction of shrinkage and creep in compression in order to assist designers in their planning and decision-making processes.

The guide acknowledges the challenges and limitations in developing prediction equations for shrinkage and compressive creep of hardened concrete. It also presents and compares the prediction capabilities of four different numerical methods, allowing designers to choose the most suitable approach for their specific needs.

The models provided in ACI 209.2R-08 are applicable to hardened concrete that has been moist cured for at least 1 day and subjected to loading after curing or later. They are designed for concretes with mean compressive cylindrical strengths at 28 days within a range of at least 20 to 70 MPa (3000 to 10,000 psi).

This guide is primarily aimed at designers who wish to predict shrinkage and creep in concrete without conducting extensive testing. However, for structures that are particularly sensitive to shrinkage and creep, the accuracy of the models' predictions can be further improved by calibrating them with test data of the actual concrete to be used in the project.