INSEE Sanstha

INSEE SANSTHA PORTLAND COMPOSITE CEMENT is the result of years of research and development, engineered with INSEE’s trademarked newly introduced SmartActTM Complex Organo-Mineral Technology. It is a unique superior blended cement with up to 35% clinker replaced with a composition of more than one cementitious mineral addition under the newly established
Sri Lanka Standard SLS 1697:2021 Specification for Portland-Composite Cement (PCC). INSEE SANSTHA PORTLAND COMPOSITE CEMENT is produced as two variants; a ternary composition
Combining of either fly ash or slag with high-grade calcium carbonate.

Producing compressive strength equivalent to that of OPC among other characteristics, INSEE SANSTHA PORTLAND COMPOSITE CEMENT comes strongly recommended for projects that require strength development at all ages. The dense microstructure and low porosity of INSEE SANSTHA PORTLAND COMPOSITE CEMENT guarantees high resistance suitable for all concrete exposure conditions across Sri Lanka, especially coastal regions. Its low heat of hydration is ideal for mass concreting, piling and foundations, while its resistance to alkali aggregate reaction (AAR) is well suited for strategic infrastructure such as dams, bridges and power plants. Optimum particle size distribution and high packing density of INSEE SANSTHA PORTLAND COMPOSITE CEMENT ensures the consumption of less mixing water, while its reduced clinker percentage results in the reduction of the carbon footprint of the cement product, making INSEE SANSTHA PORTLAND COMPOSITE CEMENT more environmentally friendly than OPC.

Fact File

Name :INSEE Sanstha
Type :Portland-Composite Cement
Sri Lankan Standard :SLS 1697:2021
Strength Class :42.5N/R
British Standard :BS EN 197 CEM II-B/M

Compressive Strength (2 days)≥ 10 N/mm2≥ 20 N/mm2
Compressive Strength (28 days)42.5 – 62.5 N/mm252 N/mm2
Initial Setting Time≥ 60 minutes130 – 150 Minutes
FinenessNot Specified in Standard400 – 420 m2/kg
Soundness< 10 mm< 1 mm
Relative DensityNot specified in standard2.96
SO3≤ 3.0 %< 2.8 %
Chloride≤ 0.1 %< 0.05 %
LOINot Specified in Standard< 3.0 %
An average of internal test results.

INSEE SANSTHA is compatible with:

  • Chemical Admixtures complying with BS EN 450-1:2014 and ASTM C494
  • Ground Granulated Blast Furnace Slag (GGBS) complying with BS EN 15167-1:2006
  • Silica Fume complying with BS EN 13263-1:2005+A1:2009
  • Manufactured Sand (M-Sand) complying with BS EN 12620:2013
  • Natural Sand, Quarry Sand and Offshore Sand complying with BS EN 12620:2013

INSEE SANSTHA is used for:

  • Individual home building with high workable and durable concrete
  • Structures requiring superior strength, water tightness with extended service life
  • Concrete roads
  • Architectural and visually appealing concrete requiring high quality surface finishes
  • Masonry and decorative constructions due to superior workability with a smoother and aesthetic finish
  • Landscaping concrete applications

Features and Benefits

Highly Workable & Durable Concrete

The limestone particles used in the manufacturing of INSEE SANSTHA have enhanced fineness and act as a lubricant in the mix, while also retaining water effectively, thereby producing highly workable concrete. These same limestone particles enhance the overall particle packing in the mix due to their engineered fineness, resulting in the augmented density of the concrete and minimized corrosion of reinforcements, making structures extremely durable.

Superior Strength

The engineered limestone particles in INSEE SANSTHA show increased strength development in concrete due to three factors; the rapid chemical
reaction of calcium carbonate with aluminate compounds in the cement resulting in durable carboaluminate crystals, the increased rate of cement
hydration, and the improved particle packing and overall concrete density, resulting in highly compact, superior strength concrete.

Exceptional Finish

The finer blended INSEE SANSTHA cement also allows for the concrete mix to be more flowable and moldable due to its increased cohesiveness, producing superior and aesthetic cement surface finishes.

Watertight Concrete

With enhanced particle packing of limestone due to their nature results in less space for water between the solid grains due to reduction in the connectivity of pores in the mix. This result of enhanced particle packing and increased mix density makes the resulting concrete extremely watertight.

A wide range of tests and equipment to assess fresh and hardened concrete properties

  • Specified Tests for Self-Compacting Concrete
    • Flow Table Test – BS EN 12350-5:2019
    • J-Ring Test – BS EN 12350-12:2010
    • V Funnel – BS EN 12350-09:2010
    • L Box – EN 12350
  • Slump test – BS EN 12350-2 and ASTM C143
  • Density of fresh concrete – ASTM C138
  • Air content in fresh concrete – ASTM 231
  • Concrete bleeding – ASTM 232
  • Concrete setting time – ASTM C403
  • Compressive Strength up to 180 MPa – Testing Machines (3000 & 4000KN) – Double the existing strength standards in Sri Lanka
  • NDT for Compressive Strength up to 130 MPa – Impact Rebound Hammers – Double the existing equipment capacity in Sri Lanka
  • Flexural Strength – ASTM C78 / BS EN 12390-5-2019
  • Splitting Resistance – ASTM C-496 / EN 12390-6 / EN 1338
  • Concrete Specimen Grinding Machine – BS EN 12390-2 2019/ ASTM D4543

A wide range of tests and equipment to assess and ensure your aggregate grade meets the demand and requirement of your concrete.

  • INSEE Measurement Tools
    • INSEE Blue™ – Assess clay content as key quality indicator for manufactured and natural pit sand
    • INSEE Shape™ – Assess the grain shape particles as key quality indicator for manufactured sand
  • Coarse and fine aggregate particles size distribution – ASTM C136 / C136M – 19 & BS EN 933-1
  • Relative Density and Absorption of Coarse Aggregates – ASTM C127-12
  • Aggregate Impact Value (AIV) – BS EN 1097-2:2010
  • Flakiness Index & Elongation Index – BS EN 933-3:2012
  • Soundness Test of Aggregates – SN EN 206-1
  • Aggregate Crushing Value (ACV)- BS EN 1097-2:2010
  • Los Angeles Abrasion Test – ASTM C 131-06

A range of tests to assess properties of fresh concrete that go beyond the traditional ‘slump test’, improving the quality and consistency of concrete.

  • INSEE Measurement Tools
    • INSEE Flow™
    • INSEE Heat™
    • INSEE Color™
    • INSEE ConTemp™
  • ICAR Rheometer for paste, mortar & concrete toassess pumpability, flow resistance, thickness, slump retention, admixtures compatibility
  • Grout for Pre-Stressing Tendons – BS EN 445 2007
  • Electrical Conductivity for paste & mortar
  • Cementometer™ latest microwave technology for the determination of fresh concrete water to cement w/c ratio

Advanced testing with durability indicators to optimize structural performance and extend the service life of concrete structures exposed to severe environments.

  • Rapid Chloride Permeability Test - ASTM C1202
  • Bulk Electrical Conductivity of Hardened Concrete - ASTM C1760-12
  • Specific Resistivity - RILEM TC154 - AASHTO T358
  • Concrete Carbonation - Swiss SIA 262-1/1 CEN/TS 12390-12
  • O2 Permeability - RILEM 116-PCD CEMBUREAU Method
  • Capillary Water Absorption/ Sorptivity - Swiss SIA 262/1:2013 ASTM C1585-04
  • Initial Surface Absorption (ISAT) - BS 1881 Part 5
  • Water Permeability - EN 12390-8:2000
  • Concrete Sulphate Resistance - SIA 262-1/A