Thursday, March 28, 2013

Acrylic Modified Waterproofing Systems

Acrylic modified cementitious systems add acrylic emulsions to a basic cement-and-sand mixture. These acrylics add waterproofing characteristics and properties to in-place materials. Acrylic systems are applied in two trowel applications, with a reinforcing mesh added into the first layer immediately upon application. This mesh adds some crack-bridging capabilities to acrylic installations. However, since the systems bond tenaciously to concrete or masonry substrates, movement capability is limited.

Acrylic cementitious systems are applicable with both positive and negative installations.
Concrete substrates can be damp, but must be cured for acrylic materials to bond properly. Alkaline substrates can deter performance of acrylic-modified cementitious systems. Acrylic-modified materials are applied in a total thickness of approximately  1 8 in.

Reinforcing mesh eliminates the need for protective covering of the systems on floor areas in minimal or light-traffic interior areas.

The properties of all types of cementitious systems are summarized in Table 2.4.

Properties of Cementitious Waterproofing Systems

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