Standard Test Method for Water Retention of Hydraulic Cement-Based Mortars and Plasters by Way of Water Loss

Importancia y uso:

5.1 This test method provides a means for determining the ability of mortars and plasters to retain water when applied to specific substrates based on the intended use of the tested mortar.

5.2 The results obtained using this test method may be used to compare the relative ability of mortars and plasters to retain water when applied to different substrates or in comparison to other mortars or plasters applied to the same substrate.

5.2.1 If applied to the same substrate, water retention values of different mortar can be compared.

5.2.2 One mortar may be applied to different substrates to understand the impact of varying substrates on water retention of the mortar.

5.3 The results obtained using this test method do not necessarily indicate the degree of water retention when used with substrates found in the field. This is because the amount of water absorbed by the substrate depends not only on the ability of the mortar to retain water but also on the particular absorption of the substrate and environmental conditions. Environmental conditions are not taken into account in this test method.

5.4 The results obtained using this test method for plasters (stucco) do not necessarily indicate the degree of water retention when the plaster is applied as a second coat on the surface of a previously applied plaster base coat, since the amount of water absorbed from the second coat of plaster depends on the rate of absorption of the base coat. This is also true when a plaster is applied as a coating on masonry units.

Subcomité:

C01.22

Volúmen:

04.01

Número ICS:

91.100.10 (Cement. Gypsum. Lime. Mortar)

Palabras clave:

absorption; mortar; plaster; water retention;