D5860-95 – Standard Test Method Technical Guide

ASTM D5860-95 (Reapproved 2022) is a standardized test method for evaluating the comparative effect of water repellent treatments on the freeze-thaw resistance of hydraulic cement mortar specimens. This laboratory screening method assists in treatment selection but may not accurately reflect field performance due to its controlled conditions.

📐 Specimen Geometry and Preparation

Test specimens are 50 mm (2 in.) mortar cubes prepared according to Test Method C109/C109M. These cubes must be greater than 28 days old to ensure proper hydration. Prior to treatment, specimens are cleaned using a wire brush or light sand blasting to remove any form oil or release agent, ensuring uniform adhesion of the water repellent treatment.

⚙️ Test Procedure and Apparatus

Mortar cubes are treated with water repellent by immersion in a corrosion-resistant pan or surface application, allowed to cure, and air dried. Weighed specimens are subjected to freeze-thaw cycles in a chamber at -19.2 ± 1.4 °C. Periodic weighing and visual inspections are conducted to monitor weight loss, spalling, and cracking. Required apparatus include a balance (≥400 g, 0.1 g sensitivity), freezing chamber, forced draft oven (110 ± 5 °C), weight per litre cup for density measurement, stiff-nylon-bristled brush, and corrosion-resistant metal pan.

📊 Key Measured Properties

Primary metrics include weight loss quantified through periodic