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STARcrete™ is a sulfur-based concrete with unique properties. General properties of STARcrete™ include:
- Extreme corrosion resistance
- High physical strength
- High fatigue resistance
- Low permeability
- Fast setting
- Avoids the usual freezing problems in sub-zero temperatures
Comparative Deterioration
IMMERSION IN 20% SULFURIC ACID
| Sulfate-Resistant Portland Cement Concrete |
STARcrete™ |
 |
| AFTER THREE WEEKS |
AFTER THREE YEARS |
The properties of STARcrete™ can be tailored for specific
applications, e.g., where toughness or impact resistance may be
required, or for use in chemical tanks and floors where continuous
exposure to acids may occur.
By selecting appropriate aggregates, the density of STARcrete™
can be varied over a wide range. Cost is governed by source and
supply of suitable aggregates, as well as sulfur, when comparing it
with normal Portland cement in developing suitable mix designs
recommended for specific applications.
Properties of STARcrete™
Data from independent laboratories
| PROPERTY |
Comparison with
62.0 MPa (5,000 psi)
Portland cement concrete |
|
| Compressive strength |
greater |
| Flexural strength |
greater |
| Splitting tensile strength |
greater |
| Modulus of elasticity |
greater |
| Compressive creep |
less |
| Bond strength to reinforcing steel |
greater |
| Bond strength to concrete |
much greater |
| Coefficient of linear expansion |
equivalent |
| Thermal conductivity |
less |
| Durability under thermal cycling |
equivalent or higher |
| Corrosion resistance |
much greater |
| Fire resistance |
slightly less |
| Fatigue resistance |
much greater |
| Water permeability |
much less |
| Abrasion resistance |
much greater |
The table below gives test results as compared to a typical Portland cement concrete using a 19 mm (3/4") washed gravel
with approximately 60% fractured face. Note that the relationship of compressive strength to modulus of elasticity can,
if desired, be varied with special additives.
| Test description |
STARcrete™
MPa (psi) |
Portland Cement
Concrete MPa (psi) |
|
| Compressive strength |
62.0 (9,000) |
34.5 (5,000) |
| Tensile strength |
7.4 (1,080) |
2.6 (380) |
| Modulus of rupture |
12.7 (1,850) |
3.65 (530) |
| Modulus of elasticity |
3 - 4 x 104
(4 - 6 x 106) |
2.8 - 3.7 x 104
(3 - 4 x 106) |
Linear coefficient
of expansion/ºC (/ºF) |
8.3 x 10-6
(4.6 x 10-6) |
8.3 x 10-6
(4.6 x 10-6) |
| Density |
2,400 kg/m³
150 lb/ft³ |
2,400 kg/m³
150 lb/ft³ |
| Amount of binder |
297 kg/m³
500 lb/yd³ |
371 kg/m³
625 lb/yd³ |
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