ASTM C1305 Test Fikstürü

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ASTM C1305 – Standard Test Method for Crack Bridging Ability of Liquid-Applied Waterproofing Membrane

 

ASTM C1305 covers a laboratory procedure for determining the ability of a waterproofing membrane to bridge a crack in the substrate.

*** There are no ISO standards similar or equivalent to this ASTM C1305  standard.

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ASTM C1305  / Apparatus and Materials

Automatic Extension and Compression Machine, with cold box capable of maintaining −26 6 1 °C [−15 6 2 °F].

Circulating Hot-Air Ove

Portland Cement, high early strength conforming to Specification C150/C150M, Type III.

Fine Aggregate, conforming to Specification C33/ C33M.

Aluminum Angles, 75 by 50 by 25 mm [3 by 2 by 1 in.], if needed.

Epoxy Cement, or gun-grade construction mastic, if needed.

Masking Tape.

Molds, six, 50 by 25 by 25 mm [2 by 1 by 1 in.] inside dimensions, or 75 by 88 by 25 mm [0.5 by 1.5 by 1 in.] notches in either side for casting mortar blocks.

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Summary of Test Method

This test method consists of casting five specimens of membrane on mortar substrates containing a preexisting crack and allowing them to age 14 days at

standard conditions followed by seven days in an air-circulating oven at 70°C158°F), placing them in a test machine, and subjecting the assembly to ten cycles

of movement.

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ASTM C1305  / Procedure

Five assemblies shall be tested.

To prepare the test assembly, set two blocks  with sides touching, in a sand bed. Level the test surface (top) and bind the blocks together using maskingtape.

Spread the test compound to a uniform thickness of 1.50 6 0.10 mm (0.060 6 0.005 in.) over the top area bisected by the joint between the blocks.

The membrane may be applied in multiple coats, if recommended by the manufacturer.

Cure the test assembly 14 days at room temperature followed by seven days in a circulating hot-air oven at 70 6 2°C (158 6 3.6°F).

Allow the test specimen to cool to room temperature for at least 1 h.

Cut a strip of membrane 6 mm (1⁄4 in.) away from the edge, across the joint on both sides.

This will eliminate edge effects . If needed, aluminum angles may be adhered to the sides of the assembly after the room temperature curing period

Remove the tape from the blocks and place them in thetesting machine, preconditioned to −26°C (−15°F) for at least 24 h.

Maintaining this temperature, subject the assembly to ten cycles of movement, each cycle consisting of pulling theblocks apart at the rate of 3.2 mm (1⁄8 in.)/h

until the space between them is 3.2 mm and then closing the space at the same rate.

Upon completion of the ten cycles, extend the membraneto 3.2 mm while still in the machine and examine the membrane for cracking, splitting, pinholes, or

any other condition in the area of the joint in the substrates.

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Referenced Documents

ASTM C 33 Specification for Concrete Aggregates

ASTM C 150 Specification for Portland Cement

ASTM C 717 Terminology of Building Seals and Sealants

ASTM C 1375 Guide for Substrates Used in Testing Building Seals and Sealants

*** Before conducting ASTM C1305 , it is important to read the entire specification. Standards can be obtained from appropriate standard authorities.

 

***PARSROS  offers several types of grips and fixtures which will enable you to perform a variety of tests

  that are accurate and repeatable.