8/10/2019 Thorma-Joint Data Sheet

1/2

Tho

rma-Jo

int

amic Surface Applications,Ltd.

373 Village Road

Pennsdale, PA 17756

800-491-5663www.dsa-ltd.com

Why Thorma-Joint?

PRODUCT DESCRIPTION:

Thorma-Joint is the original asphaltic plug expansion joint system. Introduced tothe US market by DSA, Ltd. in the late 1980s, it continues to be first choiceamong bridge engineers seeking a cost effective reliable joint system for lowmovement structures.

Thorma-Joint is a combination of BJ Super (a polymer modified asphalt binder),specifically graded aggregate, A36 mild steel plate and heat resistant backerrod. When installed properly and according to DSAs specifications, Thorma-Jointis capable of withstanding up to 2 of cumulative movement and providing a water

tight seal to protect the bridge deck and sub structure.

Resistant to puncture by foreign objects

Will not work its way out of joint cavity

Uses no metal armors that may come loose and endanger driver safety

Watertight and smooth riding

Requires no maintenance

Highly durable and proven track record

Only product of its kind guaranteed by manufacturer for 3 years

Installed in the United States since 1989 and throughout the world since the late 1970s

Quality controlled installation by DSA or factory trained certified installers

All materials independently tested to ASTM D6297-01 standards

8/10/2019 Thorma-Joint Data Sheet

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TECHNICAL DETAILS

Aggregate

The stone used shall primarily consist of Granite, Basalt, Gabbro,Porphyry or Gritstones. The specified aggregate shall be crushed,

double washed, and shall meet the following gradation requirements:

GRADATION

Sieve Size Percent Passing

Backer Rod

The backer rod shall be a closed cell, foam expansion joint filler,

capable of withstanding the elevated temperature of the polymericbinder. The backer rod shall have the following typical physicalproperties using a 2 specimen and test method ASTM D545:

Density: 2.0Lbs/Cu.Ft, min

Tensile Strength: 30 psi, min.

Compression: 5 psi @ 25%, min

Water Absorption: 0.03 g/cc bweight, min

(1% Max)

Temperature @ 410F (210C) No Melting

BJ Super Binder

The bridge joint binder shall be a polymer modified asphalt, as manufactured by Dynamic Surface Applications, and shall meet the

ollowing requirements as set forth is ASTM D6297-01 and when independently tested according to those standards.TEST METHOD TYPICAL VALUES

Cone Penetration @ 77F ASTM D5/D3407 7.5 Max

Cone Penetration @ 0F, ASTM D5/D3407 1.0 Minimum

Flow @ 140F, 5 Hours, (MM) ASTM D3407 3.0 Max

Non-Immersed Bond @ 20F, ASTM D3405 Pass 3 cycles

Three Cycles

Resilience @ 77F ASTM D3407 40-70

Asphalt Compatibility ASTM D3407 Pass

Softening Point ASTM D36 180 Minimum

Flexibility/Pliability @ -10F ASTM D5329 Pass

Ductility @77 F ASTM D113 400 Minimum

Tensile Adhesion @ 77F ASTM D5329 700 Minimum

Recommended Pouring Temperature 390 F (199 C)

Safe Heating Temperature 410 F (210 C)