Product Data Sheet Safety Data Sheet Show all documents

SikaGrout®-428 FS

High performance, fast setting, non-shrink, cement grout

SikaGrout®-428 FS is a non-shrink, non-metallic, cementitious precision grout powered by ViscoCrete technology. SikaGrout®-428 FS is designed to achieve high early strength and exceptional ultimate strengths at a fluid consistency. A structural, precision grout, SikaGrout®-428 FS can be placed from plastic to fluid over a temperature range.

  • Quick rate of strength gain
  • Multiple fluidity with one material
  • Outstanding performance in fluid state
  • Excellent fluidity, sufficient time for placement
  • Non-metallic, will not stain or rust
Product Data Sheet Safety Data Sheet Show all documents

Usage

  • For quick turnaround applications, when rate of strength gain is a significant consideration.
  • Grouting of railing posts, foundations, windmills, compressors, etc.
  • Non-shrink grouting of machinery and equipment, base plates, sole plates, precast panels, beams, columns and curtain walls.
 
  • Applications where a non-shrink grout is needed for maximum effective bearing area.
  • To transfer optimum load.
  • For grouting rebar, bolts, dowels and pins, etc.

Advantages

  • Quick rate of strength gain
  • Multiple fluidity with one material
  • Outstanding performance in fluid state
  • Excellent fluidity, sufficient time for placement
  • Non-metallic, will not stain or rust

Packaging

65 lb (29.5 kg) bag

Color

Gray powder

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

  • Meet ASTM C-1107 (Grade C)
  • Shows positive expansion as per ASTM C-827
Product Information

Shelf Life

12 months from date of production if stored properly in original, unopened and undamaged sealed packaging

Storage Conditions

Store dry at 40–95 °F (4–35 °C)

Protect from moisture. If damp, discard material

 
Technical Information

Effective Bearing Area

> 95 %

(ASTM C-1339)

Compressive Strength

Plastic40 °F73 °F90 °F
5 hours

750 psi

(5.2 MPa)

2,500 psi

(17.2 MPa)

6,000 psi

(41.4 MPa)

6 hours

1,000 psi

(6.9 MPa)

3,500 psi

(24.1 MPa)

7,000 psi

(48.3 MPa)

1 day

4,000 psi

(27.6 MPa)

7,000 psi

(48.3 MPa)

9,000 psi

(62.1 MPa)

3 days

5,500 psi

(37.9 MPa)

9,500 psi

(65.5 MPa)

11,000 psi

(75.8 MPa)

7 days

7,500 psi

(51.7 MPa)

12,000 psi

(82.7 MPa)

12,000 psi

(82.7 MPa)

28 days

11,000 psi

(75.8 MPa)

13,000 psi

(89.6 MPa)

13,000 psi

(89.6 MPa)

  

Flowable40 °F73 °F90 °F
5 hours

500 psi

(3.4 MPa)

2,000 psi

(13.8 MPa)

5,000 psi

(34.5 MPa)

6 hours

750 psi

(5.2 MPa)

3,000 psi

(20.7 MPa)

5,500 psi

(37.9 MPa)

1 day

3,500 psi

(24.1 MPa)

7,000 psi

(48.3 MPa)

7,000 psi

(48.3 MPa)

3 days

5,000 psi

(34.5 MPa)

9,000 psi

(62.1 MPa)

9,500 psi

(65.5 MPa)

7 days

7,000 psi

(48.3 MPa)

11,000 psi

(75.8 MPa)

11,000 psi

(75.8 MPa)

28 days

10,500 psi

(72.4 MPa)

12,500 psi

(86.2 MPa)

12,500 psi

(86.2 MPa)

    

Fluid40 °F73 °F90 °F
5 hours

< 200 psi

(1.4 MPa)

1,000 psi

(6.9 MPa)

4,000 psi

(27.6 MPa)

6 hours

< 500 psi

(3.4 MPa)

3,000 psi

(20.7 MPa)

6,000 psi

(41.4 MPa)

1 day

3,250 psi

(22.4 MPa)

7,500 psi

(51.7 MPa)

8,000 psi

(55.2 MPa)

3 days

6,000 psi

(41.4 MPa)

8,500 psi

(58.6 MPa)

8,500 psi

(58.6 MPa)

7 days

7,500 psi

(51.7 MPa)

10,000 psi

(69 MPa)

10,000 psi

(69 MPa)

28 days

10,000 psi

(69 MPa)

12,000 psi

(82.7 MPa)

12,000 psi

(82.7 MPa)

Flexural Strength

1 day>900 psi (6.21 MPa)

(ASTM C 78)

Splitting tensile strength

28 days> 1,000 psi (6.9 MPa)

Tensile Adhesion Strength

1 day1,800 psi (12.4 MPa)
7 days2,200 psi (15.2 MPa)
28 days2,500 psi (17.2 MPa)

* Mortar scrubbed into substrate at 73 °F (23 °C) and 50 % R.H.

Pull-Out Resistance

40 °F73 °F90 °F
1 day

200 psi

(1.4 MPa)

> 400 psi

(2.8 MPa)

> 450 psi

(3.1 MPa)

7 days

400 psi

(2.8 MPa)

> 500 psi

(3.4 MPa)

> 500 psi

(3.4 MPa)

28 days

450 psi

(3.1 MPa)

> 550 psi

(3.8 MPa)

> 550 psi

(3.8 MPa)

Expansion

40 °F73 °F90 °F
1 dayPositivePositivePositive
7 daysPositivePositivePositive
28 daysPositivePositivePositive

Rapid Chloride Permeability

28 days

(60 Volts)

< 1,000 C

Application

Application Information

Mixing Ratio

PlasticFlowableFluid
6.5 pts (3.1 L)7.0 pts (3.3 L)8 pts (3.8 L)

Layer Thickness

Min.Max.
Neat1/4" (6.4 mm)2" (50.8 mm)
Extended1" (25.4 mm)6" (152.4 mm)

Flowability

40 °F73 °F90 °F
< 45 sec> 30 sec> 30 sec

Product Temperature

65–75 °F (18–24 °C)

Ambient Air Temperature

> 40 °F (4 °C)

Substrate Temperature

> 40 °F (4 °C)

Pot Life

~ 10 minutes

As the temperature will affect the pot life, application temperature:

  • Above 73 °F (23 °C) will reduce the fluidity

  • Below 73 °F (23 °C) will extend the fluidity

Set Time

Initial Set>30 minutes
Final Set>45–60 minutes
 
Consumption

Coverage

0.50 ft3 (0.02 m3) per bag

(Coverage figures do not include allowance for surface profile and porosity or material waste)
Application steps

MIXING

  • Make sure all forming, mixing, placing, and clean-up materials are on hand.
  • Add the appropriate amount of water (depend on the desired flow) of clean potable water (approx 70 °F) into a suitably sized and clean mixing container, using a calibrated measuring jug, or similar, to ensure strict control of the water content (do not over-water).
  • Add 1 bag while continuing to mix with a low-speed drill (400-600 rpm) and Sika mixing paddle or a jiffy paddle or in an appropriate mortar mixer.
  • Once all the powder has been added, mix for approximately 3 minutes, until a lump-free and uniform consistency is achieved.
  • Do not over mix.

  • For warmer temperatures use cold water and for colder temperatures use warm water.
  • For cold temperature start with 7/8 of a gallon and add remaining 1/8, only if needed for fluid consistency.
  • Refer to ACI 306 Guidelines when there is a need to place this grout in cold & hot temperatures.

        

EXTENSION WITH AGGREGATES

           

  • For deeper applications, SikaGrout®-428 FS may be extended with 3/8" (9.5 mm) pea gravel (plastic and flowable consistencies only).
  • The aggregate must be non-reactive (reference ASTM C-1260, C-227 and C-289), clean, well graded, Saturated Surface Dry (SSD), have low absorption and high density, and comply with ASTM C-33 size number 8 per Table 2.
  • Variances in aggregate may result in different strengths.
  • The addition rate is 30 lb (13.7 kg) of aggregate per bag. It is approximately 2.4 gal (9.1 L) by loose volume of aggregate.

  

APPLICATION

  • Within no more than 10 minutes after mixing, place grout into forms in normal manner to avoid air entrapment.
  • Mixed grout in mass will result in faster than expected setting times.
  • Plan jobs accordingly so that the grout can be placed right after mixing.
  • Vibrate, ram grout as necessary to achieve flow or compaction.
  • SikaGrout®-428 FS must be confined leaving minimum exposed surface.
  • After grout has achieved final set, remove forms, trim or shape exposed grout shoulders to designed profile.
  • Wet cure for a minimum of 3 days or apply a water based curing compound which complies with ASTM C-309 on exposed surfaces.

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