Composite Mineral Casting

Mineral casting, also known as resin concrete, is a kind of new-type composite material products composed of inorganic mineral materials and high-performance thermosetting resin system.

The combination of both inorganic and organic materials provides this material with outstanding damping performance, high dimensional precision, low heat conductivity, relatively high specific heat capacity, good corrosion resistance and low water absorption. In addition, by taking advantage of the molding of resin composite materials, mineral casting can be employed to design complicated embedded parts, with small internal stress for curing under room temperature, and short molding cycle.

Comparison of Different Structural Materials

  Composite Mineral
Cast Iron Natural Granite
Damping High Medium Low
Heat Performance Low heat conductivity
and high spec. heat
High heat conductivity and
low spec. heat capacity
Medium heat conductivity
and medium specific
heat capacity
Embedded Parts Unlimited design and
One-piece mould and
seamless connection
Machining necessary Machining and bonding
Lead Time Much shorter than cast
iron or natural granite
Ageing treatment is necessary
for high precision products
A long time is necessary
for machining and
Corrosion Resistance Extra high Low Medium
Low energy consumption High energy consumption

Limited natural resource

Material Properties of Gurit Composite Mineral Casting

Gurit Composite Mineral Casting Other Materials
Material Properties GA01 GA02 Cast Iron Natural Granite
Flexural Strength (Mpa) 30-40 40-50 100-300 20-30
Compressive Strength (Mpa) 150-170 170-190 580-950 200-300
Elasticity Modulus (Gpa) 40-45 40-50 90-130 50-100
Damping Ratio 0.01-0.02 0.01-0.02 0.001 0.002
Heat Conductivity (W/(m*k)) 0.7-1.5 0.7-1.2 50-60 1.5-2.5
Density (kg/dm3) 2.3 2.4 7.2 3.0
Poisson’s Ratio 0.2-0.3 0.15-0.25 0.2-0.3 0.2-0.3
CTE(10-6 * K-1) 15-17 11-13 8-11 5-7
Specific Heat Capacity[KJ/(kg*K)] 1.55 1.57 0.50 0.80