Core Material Testing Services LLP

Micro Silica (also known as Silica Fume) is a high-performance pozzolanic material used to enhance strength, durability, and resistance in concrete and cement applications. Micro Silica Testing Service ensures that silica fume meets industry standards such as IS 15388, ASTM C1240, AASHTO M307, and EN 13263 by evaluating its chemical composition, fineness, and reactivity.
Key Micro Silica Tests & Parameters 1. Physical & Mechanical Tests
✅ Fineness Test (IS 15388, ASTM C1240) – Measures particle size distribution (Blaine fineness)
✅ Specific Surface Area (BET Method, IS 15388, ASTM C204) – Determines reactivity and pozzolanic activity
✅ Bulk Density Test (ASTM C188, IS 4031 Part 11) – Evaluates packing efficiency and handling properties
✅ Pozzolanic Activity Index (IS 1727, ASTM C311) – Measures strength contribution in cement
2. Chemical Composition Tests
✅ Silicon Dioxide (SiO₂) Content (IS 15388, ASTM C1240) – Ensures minimum 85% silica content for high reactivity
✅ Loss on Ignition (LOI) (ASTM C311, IS 4032) – Verifies organic impurities and unburnt carbon
✅ Sulfur Trioxide (SO₃) Test (ASTM C114, IS 4032) – Ensures low sulfate levels for durability
✅ Chloride Content Test (ASTM C1152, IS 4032) – Prevents corrosion in reinforced concrete
✅ pH & Alkalinity Test (ASTM D1293, IS 2720 Part 26) – Ensures compatibility with cement
Importance of Micro Silica Testing
✔ Ensures High-Quality Concrete & Cement – Improves compressive strength & impermeability
✔ Optimizes Pozzolanic Reaction – Enhances early strength gain & reduces permeability
✔ Prevents Alkali-Silica Reaction (ASR) – Increases durability against cracking & expansion
✔ Complies with Construction Standards – Required for government & industrial projects