Product Data Sheet
Show all documents

SikaFlow®-668

(formerly MFlow 668)

EPOXY CHOCK GROUT FOR MOUNTING EQUIPMENT

SikaFlow®-668 Chock Grout is a three-component modified epoxy resin-based grout. It is used where high performance properties are required in less-accessible spaces subject to thermal shock and high vibrations. It can be placed from 1/2–3" (12.5–76 mm) thick on a base grout pour, directly to the concrete or steel to steel.

  • Highly flowable to conform to worn or irregular surfaces.
  • Excellent physical properties at a wide temperature range.
  • May be used to replace metal chocks, eliminating costly milling.
  • Low creep over a wide temperature range minimizes deformation under sustained loads.
Product Data Sheet
Show all documents

Usage

  • Precision grouting of machinery
  • Grouting of reciprocating gas compressors
  • Grouting of steam and gas turbines
  • Steel-to-steel chock grouting
  • Where conventional epoxy grouts cannot be used due to limited access
 

Advantages

  • Highly flowable to conform to worn or irregular surfaces.
  • Excellent physical properties at a wide temperature range.
  • May be used to replace metal chocks, eliminating costly milling.
  • Low creep over a wide temperature range minimizes deformation under sustained loads.

Packaging

One 59.7 lb (27.5 kg) unit consists of the following:

  • 8.33 lb (3.78 kg) can Part A (Resin)
  • 1.37 lb (0.62 kg) bottle Part B (Hardener)
  • 50 lb (22.68 kg) bag Part C (Aggregate)

Product Details

Product Information

Chemical Base

SikaFlow®-668 Chock Grout is a three-component modified epoxy-resin-based grout.

Shelf Life

2 years (for both resin and hardener) when properly stored

Storage Conditions

Store in unopened containers at 60 to 80° F (16 to 27° C) in clean, dry conditions.

Density

129lb/ft3 (2,064kg/m3)

(ASTM C 905)

Specific gravity: 2.06

 
Technical Information

Compressive Strength

Conditioned 1 hour after test temperature

Test temp

7 day cure at 73°F (23°C)

16 hour cure at 140°F (60°C)

73°F (23°C)18,300 psi (126 MPa)18,900 psi (130 MPa)
140°F (60°C)13,100 psi (90 MPa)14,700 psi (101 MPa)
170°F (77°C)13,100 psi (90 MPa)13,800 psi (95 MPa)
235°F (113°C)8,000 psi (55 MPa)8,400 psi (58 MPa)

Flexural Strength

6,200 psi (43 MPa) at 73°F (23°C)

(ASTM C 580)

Modulus of Elasticity in Flexure

Test Temp

Modulus of Elasticty

73°F (23°C)2.3 x 106 psi (16 GPa)
110°F (43°C)2.2 x 106 psi (15 GPa)
125°F (52°C)2.1 x 106 psi (15 GPa)
140°F (60°C)2.1 x 106 psi (15 GPa)
155°F (68°C)2.0 x 106 psi (14 GPa)
170°F (77°C)1.7 x 106 psi (12 GPa)

Tensile Strength

2,600 psi (17,9 MPa) at 73°F (23°C)

(ASTM C 307)

Tensile Adhesion Strength

Bond strength to steel

Temperature

Tensile Bond Strength

73°F (23°C)5,300 psi (36 MPa)
140°F (60°C)3,500 psi (24 MPa)
170°F (77°C)3,200 psi (22 MPa)
235°F (113°C)1,200 psi (8 MPa)

Bond strength to concrete

350 psi (2.4 MPa); concrete failure

Slant Shear Strength

Bond strength to steel

Temperature

Shear Bond Strength 

73°F (23°C)4,500 psi (31 MPa)
140°F (60°C)3,600 psi (25 MPa)
170°F (77°C)3,600 psi (25 MPa)
235°F (113°C)1,200 psi (8 MPa)

Creep

Temperature

Condition

Creep at 1 year

140°F (60°C)600 psi (4.1 MPa)0.8 x 10-3n/in (2.03 x 10-3cm/cm)
140°F (60°C)900 psi (6.2 MPa)1.3 x 10-3n/in (3.3 x 10-3cm/cm)
140°F (60°C)1,200 psi (8.3 MPa)1.9 x 10-3n/in (4.83 x 10-3cm/cm)

Coefficient of Thermal Expansion

19 x 10-6in/in/°F (34 x 10-6cm/cm/°C)at 73 to 210°F (23 to 100°C)

Water Absorption

0.09%

(ASTM C 413)

 

Reaction to Fire

Flash points

SikaFlow®-668 Chock Grout Resin

> 230°F (110°C)

SikaFlow®-668 Chock Grout Hardener

210°F (99°C)

Application

Application Information

Thinner

Working Time

90° F (32° C)1/2 hr
73° F (28° C)1 hr
55° F (13° C)3 hrs

Curing Rate

Compressive Strength when cured at these conditions:

Time (hrs)

55°F (13°C)73°F (23°C)90°F (32°C)

8

-14,500 psi
(100 MPa)		18,600 psi
(128 MPa)

16

9,500 psi
(66 MPa)		17,000 psi
(117 MPa)		19,000 psi
(131 MPa)
2414,000 psi
(97 MPa)		18,000 psi
(124 MPa)		19,200 psi
(132 MPa)
4815,300 psi
(106 MPa)		18,800 psi
(130 MPa)		19,200 psi
(132 MPa)
Consumption

Coverage

0.47 ft3 (0.013 m3)
Application steps

NOTES ON INSTALLATION

DO NOT INSTALL THIS PRODUCT WITHOUT READING AND REFERENCING THE COMPANION SikaFlow®-668 INSTALLATION GUIDE.

  • Minimum placement thickness is 1/2" (13 mm).
  • Do not add solvent, water, or any other material to the grout.
  • Do not alter the resin or hardener proportions.
  • Contact your local representative for a pre-job conference to plan the installation.
  • Cold material will exhibit decreased flowability and decreased strength development.
  • For professional use only; not for sale to or use by the general public.
  • Make certain the most current versions of product data sheet and SDS are being used.
  • Proper application is the responsibility of the user. Field visits by Sika personnel are for the purpose of making technical recommendations only and not for supervising or providing quality control on the jobsite.

SURFACE PREPARATION

GENERAL APPLICATION INSIGHTS

  1. Chock size should be determined by a mechanical or structural engineer, based on anticipated stresses and grout capabilities.
  2. Most chock grout applications involve the placement of epoxy chocks on a base grout pour. Please see the SikaFlow®-648 grout product data sheet.
  3. Typical epoxy chock thickness should be from 2–3" (51–76 mm).
  4. The base grout pour should cure sufficiently before the chock grout application.

MIXING

  1. Aggregate must be completely dry.
  2. Precondition all components to 70° F (21° C) for 24 hours before using.
  3. Pour the hardener (Part B) into a pail of grout resin (Part A) and stir by hand, using a spatula or paint stirring paddle, until well mixed to a uniform amber color.
  4. Pour the mixed liquids into a horizontal shaft mortar mixer or a Kol type mixer without delay.
  5. Add the grout aggregate, one bag at a time, and mix only until aggregate is completely wetted out to avoid air entrapment. Caution: Always add aggregate to the mixer after the premixed liquids have been poured in.
  6. Pour the grout into a wheelbarrow or buckets for transporting to pour-site. Remove it from the wheelbarrow within 10 minutes.
  7. After the pour is complete, clean the mixer and tools with acetone, MEK, or lacquer thinner. Exercise caution when using flammable solvents for cleaning.

Documents