ASTM C1384-18e1 PDF Download

ASTM C1384-18e1 is a standard specification that addresses the use of admixtures in masonry mortars. Admixtures are substances that are added to conventional masonry mortar in order to enhance its properties. These admixtures are classified based on their effect on the performance characteristics of the mortar, such as bond strength, workability, setting time, and water repellency.

The standard covers a range of materials that can be used in masonry mortar, including Portland cement, hydraulic cement, blended hydraulic cement, masonry cement, mortar cement, lime, and sand. It also outlines various test methods that can be used to evaluate the properties of admixed mortars, such as compressive strength, water retention, air content, board life, flexural bond strength, and rate of water absorption.

It is important to note that this specification does not cover coloring pigments or additives that are added to the cementitious materials during their manufacture. The acceptance of an admixture is based on its performance in an admixed mortar, either equivalent to or better than conventional mortar, while maintaining the required performance levels for other properties. Testing laboratories should follow the evaluation procedures outlined in Practice C1093.