Product Data Sheet
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Sikadur®-42 Grout-Pak PT

Pre-proportioned, epoxy, anchorage protection system

Sikadur®-42 Grout-Pak PT is a 3-component, 100 % solids, moisture-tolerant, epoxy anchorage protection system.

  • Ready to mix, pre-proportioned kit.
  • Excellent adhesion.
  • Impermeable and resistant to chemicals, corrosion, impact and stress.
  • Moisture-tolerant.
  • Low heat development/low peak exothermic system for large pours.
  • High compressive strength.
  • Long working time.
  • High vibration resistance.
  • Fast strength gain.
  • Minimal shrinkage/expansion.
  • High effective bearing area.
  • Good flowability.
Product Data Sheet
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Usage

  • To protect the anchorages of post-tensioning tendons or bars (i.e. pour-back box) on segmental bridge
    projects.
 

Advantages

  • Ready to mix, pre-proportioned kit.
  • Excellent adhesion.
  • Impermeable and resistant to chemicals, corrosion, impact and stress.
  • Moisture-tolerant.
  • Low heat development/low peak exothermic system for large pours.
  • High compressive strength.
  • Long working time.
  • High vibration resistance.
  • Fast strength gain.
  • Minimal shrinkage/expansion.
  • High effective bearing area.
  • Good flowability.

Packaging

0.5 cu. ft. kit consists of epoxy resin (Component ‘A’ and ‘B’) and 50 lb. aggregate. (Component ‘C’) in a multi-wall bag.

Color

Dark Gray

Product Details

Product Information

Shelf Life

2 years in original, unopened containers.

Storage Conditions

Store dry at 40–95°F (4–35°C). Condition material to 75–85 °F (24–29 °C) before using. Component ‘C’ must be kept dry.

 
Technical Information

Compressive Strength

40 °F (5 °C)

73 °F (23 °C)

90 °F (32 °C)

8 hours

-

-8,200 psi (56.5 MPa)
16 hours

-

10,000 psi (68.9 MPa)13,000 psi (89.6 MPa)
1 day

-

11,000 psi (75.8 MPa)14,000 psi (96.5 MPa)
3 days6,500 psi (44.8 MPa)14,200 psi (97.9 MPa)15,000 psi (103.4 MPa)
7 days7,200 psi (49.6 MPa)15,000 psi (103.4 MPa)15,000 psi (103.4 MPa)
14 days 9,000 psi (62.1 MPa)16,000 psi (110.4 MPa)16,500 psi (113.9 MPa)

28 days

11,000 psi (75.9 MPa )17,000 psi (117.3 MPa)17,500 psi (120.8 MPa)

Material cured and tested at the temperatures indicated.

Modulus of Elasticity in Compression

2,600 ksi (17,940 MPa) (7 days)

(ASTM C-469)

73 °F (23 °C)

50 % R.H

Effective Bearing Area

>  95 % final surface area of grout in contact with bearing plate

(ASTM C-1339)

Flexural Strength

3,700 psi (25.5 MPa) (7 days)

(ASTM C-580)

73 °F (23 °C)

50 % R.H.

Modulus of Elasticity in Flexure

1,400 ksi (9,655 MPa) (7 days)

(ASTM C-580)

73 °F (23 °C)

50 % R.H.

Tensile Strength

2,200 psi (15.1 MPa) (7 days)

(ASTM C-307)

73 °F (23 °C)

50 % R.H.

Tensile Adhesion Strength

Bond Strength to Concrete (wet cure)

3,100 psi (21.3 MPa)

(7 days)

Bond Strength to Steel (wet cure)

3,600 psi (24.8 MPa)

(7 days)

Shrinkage

0.022 % (7 days)

(ASTM C-531)

73 °F (23 °C)
50 % R.H.

Creep

1 day

0.0085 in./in.

(0.0085 mm/mm)

7 days

0.0086 in./in.

(0.0086 mm/mm)

28 day

0.0093 in./in.

(0.0093 mm/mm)

Thermal Compatibility

Passes test (5 cycles)

(ASTM C-884)

73 °F (23 °C)

50 % R.H.

Coefficient of Thermal Expansion

73–212 °F (23–100 °C)19.2 x 10-6in./in./ЉF (10.0 x10-6 mm/mm/ЉC)
0–160 °F (-18–71 °C)12.6 x 10-6in./in./ЉF (6.8 x10-6 mm/mm/ЉC)

Heat Deflection Temperature

[fiber stress loading = 264 psi (1.8 MPa)] (7 days)

(ASTM D-648)

125 °F (52 °C)

50 % R.H.

Water Absorption

0.04 % (7 days)

(ASTM C-413)

(2-hour boil)

73 °F (23 °C)
50 % R.H.

Application

Application Information

Mixing Ratio

Component A : B : C = 3.6 : 1 : 34 by weight
Solid / liquid = 7.4 : 1 by weight

Peak Exotherm

Specimen Size Tested

13 in. x 10 in. x 6 in. (330 mm x 254 mm x 152 mm)

(ASTM D -2471)

118 °F (48 °C)

Pot Life

Approximately 90 minutes

Gel Time: Approximately 3.25 hrs.

(ASTM D-2471)

73 °F (23 °C)

50 % R.H.
Application steps

SUBSTRATE QUALITY

Concrete must be older than 28 days (dependent on minimum strength requirements).
The substrate surface (all types) must be clean, dry and free from contaminants such as dirt, oil, grease, existing surface treatments and coatings, etc.

Steel substrates must be de-rusted to a standard equivalent to Sa 2.5.

The substrate must be sound, and all loose particles must be removed. Substrate must be dry or mat damp and free from any standing water, ice, etc.

SUBSTRATE PREPARATION

Substrate and other contact areas must be clean, sound, and free of standing water. Remove dust, laitance, oils, grease, curing compounds, waxes, impregnations, foreign particles, coatings and disintegrated materials by mechanical means (i.e. sandblasting, bush hammering). Sandblast metal contact surfaces to a commercial white finish for maximum adhesion. Apply grout immediately to prevent re-oxidizing. Concrete substrate shall have reached its desired strength [3,000 psi (20.7 MPa) minimum] and must be dimensionally stable.

MIXING

Pour the entire contents of Components ‘A’ & ‘B’ into an appropriate mixing vessel (e.g. 5 gal. bucket) and mix for 30 seconds with a 1/2 in. Jiffy mixing paddle (5 in. blade diameter) on a low-speed (400–600 rpm) 3/4 in. drive rotary drill, taking care not to entrain air during mixing. It is critical to the performance of the grout that there be no appreciable air bubbles in the resin. Slowly add the entire contents of Component ‘C’ and mix until uniformly blended (approx. 5 minutes).

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