RUBBER MEMBRANE

GENERAL

Rubber Membranes are used in preventing water under hydrostatic pressure and other materials from entering undesired areas of a structure. Adhesives utilized on the membrane to concrete and other surfaces shall be as recommended by the manufacturer of the Membrane.

Note: some products may require multiple layers of their membrane based on manufacturers recommendations when applied to joints over 1/16”. Special care should be taken to follow manufacturer’s recommendations for product installation.

MANUFACTURER & BRAND NAME APPROVAL

Rubber Membranes shall meet the following requirements:

Property	Test Method	Min Value
Thickness	ASTM D3767	50 mils
Pliability	ASTM D146	No cracks when bent 180 deg. around mandrel at -25 F
Tensile strength	ASTMD412	1000 psi
Elongation, Ult	ASTMD412	300%
Puncture resistance	ASTME154	40 lbs.
Permeance (MAX)	ASTME96	0.14 (MAX)

Manufacturers, suppliers, distributors and / or producers shall submit product information including Product data sheets, MSDS and any independent test data available to the construction and material bureau c/o the manufactured materials engineer for review for inclusion onto the approved list of products.

Acceptance of Rubber Membranes will be based on products meeting the material requirements listed above.

Approved manufacturers and brand names are listed in MAPLE.

ACCEPTANCE

Acceptance of Rubber Membranes will be based on approved source/brand name that meet the requirements above.

MONITOR SAMPLING AND TESTING

The Iowa DOT may sample at the job site, supplier, or source and test to verify compliance with the specifications.