ASTM C1585 − 13 Standard Test Method for Measurement of Rate of Absorption of Water by HydraulicCement Concretes

ASTM C1585 − 13 Standard Test Method for Measurement of Rate of Absorption of Water by HydraulicCement Concretes

Scope
1.1 This test method is used to determine the rate of absorption (sorptivity) of water by hydraulic cement concrete by measuring the increase in the mass of a specimen resulting from absorption of water as a function of time when only one surface of the specimen is exposed to water.

The specimen is conditioned in an environment at a standard relative humidity to induce a consistent moisture condition in the capillary pore system.

The exposed surface of the specimen is immersed in water and water ingress of unsaturated concrete is dominated by capillary suction during initial contact with water.

ASTM C1585 − 13 Standard Test Method for Measurement of Rate of Absorption of Water by HydraulicCement Concretes

Significance and Use

4.1 The performance of concrete subjected to many aggressive environments is a function, to a large extent, of the penetrability of the pore system.

In unsaturated concrete, the rate of ingress of water or other liquids is largely controlled by absorption due to capillary rise.

This test method is based on that developed by Hall3 who called the phenomenon “water sorptivity.”