Five Star HTR Grout

Five Star HTR Grout is a unique cement based grout for supporting equipment and structural base plates in high temperature environments. Five Star HTR Grout can be poured into place, gains strength rapidly and can be exposed to 1,000°F in 24 hours and up to 2,400°F after a 7-day curing procedure.

  • High temperature resistance
  • Thermal shock resistance
  • High 24-hour compressive strength

Five Star HTR Grout Datasheet

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HTR Grout is a specialized cement-based grout engineered to deliver exceptional performance in high-temperature environments where conventional grouts fail. Designed for supporting equipment and structural base plates exposed to extreme heat, this unique formulation can withstand temperatures up to 2,400°F (1,316°C) while maintaining structural integrity and dimensional stability. With rapid strength development reaching 4,000 psi in just 24 hours, HTR Grout enables quick turnaround during critical maintenance shutdowns and provides reliable support for industrial equipment operating under severe thermal conditions.

This advanced grout system exhibits positive expansion characteristics when tested per ASTM C 827, ensuring tight contact with equipment bases and eliminating void spaces that could compromise structural performance. Its thermal shock resistance allows for repeated heating and cooling cycles without degradation, making it ideal for applications where equipment undergoes frequent temperature fluctuations. The formulation incorporates air release technology per ACI 351.1 R standards, ensuring proper consolidation and maximum strength development even in challenging placement conditions.

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Key Features of HTR Grout

  • High Temperature Resistance
    Withstands exposure to 1,000°F (538°C) in 24 hours and up to 2,400°F (1,316°C) after proper curing procedures.
  • Rapid Strength Development
    Achieves 4,000 psi compressive strength in 24 hours, 5,500 psi in 7 days, and 6,500 psi in 28 days for quick equipment startup.
  • Thermal Shock Resistance
    Maintains consistent strength of 5,300 psi through repeated thermal cycling from ambient to 1,000°F temperatures.
  • Positive Expansion Properties
    Exhibits controlled expansion during curing to ensure complete contact with equipment bases and eliminate shrinkage gaps.
  • Air Release Technology
    Incorporates advanced air release system per ACI 351.1 R for superior consolidation and void elimination.
  • Excellent Bond Strength
    Provides 2,500 psi bond strength to concrete substrates for secure equipment anchoring.

Recommended Applications for HTR Grout

HTR Grout is specifically formulated for industrial professionals working with equipment and structures exposed to extreme temperatures. Its unique combination of high-temperature resistance, rapid strength gain, and thermal shock resistance makes it the optimal choice for critical applications where equipment downtime must be minimized and structural performance maintained under severe thermal conditions.

Ideal Applications Include:

    • Coker unit equipment and structural supports
    • Kiln and furnace base plates and anchoring systems
    • Foundry equipment and machinery supports
    • High-temperature processing equipment
    • Thermal cycling applications up to 2,400°F
    • Rapid turnaround maintenance during shutdowns
    • Equipment exposed to repeated thermal shock
    • Industrial base plates requiring thermal stability

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Technical Specifications – Five Star HTR Grout

Unique cement-based grout for high temperature equipment support up to 2,400°F (1316°C).

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6,500 PSI 28-Day Strength
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2,400°F Max Temperature

ACI 351.1 R Air Release Tech
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20 min Working Time

Compressive Strength Development: Cement-based system for rapid strength gain
Age Compressive Strength Test Method
1 Day 4,000 psi (27.6 MPa) ASTM C 942
7 Days 5,500 psi (38.0 MPa) ASTM C 942
28 Days 6,500 psi (44.9 MPa) ASTM C 942

Thermal Shock Resistance: Tested with 1000°F (538°C) in 24-hour cycles
# Cycles Age Strength
1 1/2 cycles 2 days 5,300 psi
5 1/2 cycles 7 days 5,300 psi
20 1/2 cycles 28 days 5,300 psi

Physical Properties: Additional performance characteristics at 70°F (21°C)
Property Value Standard
Bond Strength (7 Days) 2,500 psi (17.3 MPa) ASTM C 882
Thermal Coefficient of Expansion 5.0 x 10⁻⁶ in/in/°F ASTM C 531
Early Height Change Positive Expansion ASTM C 827
Working Time at 70°F (21°C) 20 minutes

Application Information: Packaging and mixing specifications
Parameter Specification
Package Size 50 lb. (22.7 kg) bag
Yield per Bag 0.42 ft³ (11.9 liters)
Water per Bag 3 to 3.5 quarts per 50 lb bag
Shelf Life 1 year (unopened, dry storage)


Air Release Technology per ACI 351.1 R

Thermal Shock Resistance

Rapid Turnaround During Shutdowns

Coker, Kiln & Foundry Applications
Professional Installation Required: Contact a sales representative for project-specific recommendations

Frequently Asked Questions

What is the maximum temperature HTR Grout can withstand?
HTR Grout can be exposed to 1,000°F (538°C) in 24 hours after placement and up to 2,400°F (1,316°C) after a complete 7-day curing procedure consisting of 3 days wet curing followed by 4 days dry curing.

How quickly can equipment be returned to service?
Equipment can typically be brought up to operating temperature of 1,000°F approximately 24 hours after placement. For higher temperatures up to 2,400°F, allow the full 7-day curing procedure before gradually applying heat.

What is the working time for HTR Grout?
HTR Grout has a working time of approximately 20 minutes at 70°F (21°C). For optimal performance, condition the material and work area between 60°F and 80°F (16°C and 27°C).

How much water should be added per bag?
Mix HTR Grout with 3 to 3.5 quarts of potable water per 50 lb. bag. Always add water to the mixer first, followed by the grout powder, and mix thoroughly for 4-5 minutes.

What is the minimum placement thickness?
The minimum placement thickness for HTR Grout is 1 inch (25 mm). For pours exceeding 3 inches in depth, extend with clean, damp coarse aggregate suitable for high-temperature exposure.

How should the grout be cured?
HTR Grout should be wet cured for a minimum of 30 minutes immediately after placement. For applications up to 1,000°F, cure for 24 hours. For temperatures up to 2,400°F, wet cure for 3 days followed by dry cure for 4 days before slowly applying heat.

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