ASTM C1012-03 - 10.6.2003
 
1. Scope

1.1 This test method covers the determination of length change of mortar bars immersed in a sulfate solution. Mortar bars made using mortar described in Test Method C 109/C 109M are cured until they attain a compressive strength of 20.0 ± 1.0 MPa (3000 150 psi), as measured using cubes made of the same mortar, before the bars are immersed.

1.2 The values stated in SI units are to be regarded as the standard. The values shown in parentheses are for information purposes only.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Note 1—Warning: Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure.

 
2. Referenced Documents

C490-07

Standard Practice for Use of Apparatus for the Determination of Length Change of Hardened Cement Paste, Mortar, and Concrete

C452-21

Standard Test Method for Potential Expansion of Portland-Cement Mortars Exposed to Sulfate

C595-08

Standard Specification for Blended Hydraulic Cements

C597-22

Standard Test Method for Ultrasonic Pulse Velocity Through Concrete

C618-26

Standard Specification for Coal Ash and Raw or Calcined Natural Pozzolan for Use in Concrete

C684-99

Standard Test Method for Making, Accelerated Curing, and Testing Concrete Compression Test Specimens

C778-26

Standard Specification for Standard Sand

C917-05

Standard Test Method for Evaluation of Cement Strength Uniformity From a Single Source

C989-10

Standard Specification for Slag Cement for Use in Concrete and Mortars

D1193-24

Standard Specification for Reagent Water

E18-25

Standard Test Methods for Rockwell Hardness of Metallic Materials

ACI C201-2R-01

Guide to Durable Concrete

C511-21

Standard Specification for Mixing Rooms, Moist Cabinets, Moist Rooms, and Water Storage Tanks Used in the Testing of Hydraulic Cements and Concretes

C349-24

Standard Test Method for Compressive Strength of Hydraulic-Cement Mortars (Using Portions of Prisms Broken in Flexure)

C348-21

Standard Test Method for Flexural Strength of Hydraulic-Cement Mortars

C305-20

Standard Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency

C215-19

Standard Test Method for Fundamental Transverse, Longitudinal, and Torsional Resonant Frequencies of Concrete Specimens

C157/C157M-24e1

Standard Test Method for Length Change of Hardened Hydraulic-Cement Mortar and Concrete (Includes all amendments and changes 10/14/2024).

C150-07

Standard Specification for Portland Cement

C114-24

Standard Test Methods for Chemical Analysis of Hydraulic Cement

C109/C109M-26a

Standard Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 50 mm [2 in.] Cube Specimens) (Includes all amendments and changes 7/30/2026).