ASTM C1581/C1581M − 09a Standard Test Method for Determining Age at Cracking and Induced Tensile Stress Characteristics of Mortar and Concrete under Restrained Shrinkage

ASTM C1581/C1581M − 09a Standard Test Method for Determining Age at Cracking and Induced Tensile Stress Characteristics of Mortar and Concrete under Restrained Shrinkage

Scope

1.1 This test method covers the laboratory determination of the age at cracking and induced tensile stress

characteristics of mortar or concrete specimens under restrained shrinkage.

The procedure can be used to determine the effects of variations in the proportions and material properties of

mortar or concrete on cracking due to both drying shrinkage and deformations caused by autogenous shrinkage and heat of hydration.

1.2 This test method is not intended for expansive materials.

1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values

stated in each system may not be exact equivalents; therefore, each system shall be used independently of the

other.

Combining values from the two systems may result in non-conformance with the standard.

ASTM C1581/C1581M − 09a Standard Test Method for Determining Age at Cracking and Induced Tensile Stress Characteristics of Mortar and Concrete under Restrained Shrinkage

Significance and Use

4.1 This test method is for relative comparison of materials and is not intended to determine the age at cracking

of mortar or concrete in any specific type of structure, configuration, or exposure.

4.2 This test method is applicable to mixtures with aggregates of 13-mm [0.5-in.] maximum nominal size or less.