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Dmax 25 stone factory running mesh 0x33mm

Dmax 25 stone is the type of stone with the largest particle size (Dmax) of 25 mm. This is a type of crushed stone or crushed stone from natural stone (limestone, granite, basalt…), often used in concrete, construction foundations and road construction. Classification and origin of Dmax 25 stone

  • Classification by stone origin
  • Crushed granite: Hard, durable, less weathered.
  • Crushed limestone: Softer, easier to process but less resistant to force.
  • Crushed basalt: Very hard, good resistance, weather resistant.
  • Classification by purpose of use
  • Concrete stone (used in high-strength concrete).
  • Foundation stone (used for construction works).
  • Graded stone mix (used in roadbeds).
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1. In cement concrete

  • High-strength structural concrete (≥ M300).
  • Concrete for roads, bridges, ports, airports.
  • Precast concrete: columns, beams, floors, piles…

2. In construction foundations

  • As a cushion for house foundations, bridge foundations, warehouse foundations.
  • As a foundation for traffic roads, helping to increase load-bearing capacity.

3. In road construction

  • Base layer of crushed stone (type 1 or type 2) according to TCVN 8859:2011.
  • As base layer, subbase layer in the structure of automobile roads.

4. In hydraulic works

  • Reinforce weak soil, build embankments, prevent erosion.
  • As a protective layer for dam feet, canals.
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The physical and mechanical standards of Dmax 25 stone are determined according to TCVN 7570:2006 or ASTM C33.

1. Graincomposition

Sieve size (mm) Screen passing rate (%)
25.0 100
19 85 – 100
9.5 40 – 70
4.75 0 – 10

2. Important physical and mechanical indicators

Indicators Standard values
Compressive strength ≥ 80 MPa (depending on the type of rock)
Los Angeles (LA) wear and tear ≤ 35%
Impactness (AI) ≤ 30%
Flatten factor ≤ 15%
Dust, silt, clay content ≤ 1%
Water absorption ≤ 2%
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  • TCVN 7570:2006 – Requirements for coarse aggregates for concrete.
  • TCVN 8859:2011 – Regulations on grading of crushed stone in roadbed.
  • ASTM C33 – American standard for aggregates for concrete.
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1. Advantages

  • Good load-bearing capacity – High strength, suitable for load-bearing structures.
  • Suitable size – Easy to mix with cement, not too large like Dmax 37.5.
  • Reasonable porosity – Supports drainage and increases the durability of the structure.
  • Multi-purpose – Can be used for concrete, road foundations, construction foundations…

2. Disadvantages

  • Not suitable for small-section concrete due to large particle size.
  • Requires strict quality control to ensure uniform particle composition.
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Properties Stone Dmax 25 Stone Dmax 37.5 Dmax 19 Stone Stone Dmax 9.5
Maximum grain size 25 mm 37.5 mm 19 mm 9.5 mm
Main applications Concrete, road foundation Road foundation, large-scale concrete Civil concrete Low-grade concrete
Load-bearing capacity High Very tall Medium Low
Porosity Medium Low High Very tall
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1. Selection criteria

  • Stone grains have uniform size, few flat grains.
  • Surface is clean, free of impurities such as dust, mud, clay.
  • High compressive strength, suitable for construction requirements.

2. Storage and transportation

  • Avoid contamination from soil, sand during storage.
  • Pile properly, avoid mixing with other types of stone.
  • Store in a dry place, avoid being washed away by rainwater.
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Dmax 25 stone is an important material in construction, especially in concrete and foundations. With good bearing capacity and suitable size, it is widely used in civil and industrial works.

  • Main application: High strength concrete, road foundation, foundation.
  • Applicable standards: TCVN 7570:2006, TCVN 8859:2011, ASTM C33.
  • Notes when using: Ensure the grain size meets the standard, control the quality before construction.
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