INSEE Sanstha Portland Composite Cement

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

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.

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

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

PROPERTYSLS 1697 : 2021
Compressive Strength (2 days)≥ 10 N/mm2≥ 20 N/mm2
Compressive Strength (28 days)42.5 – 62.5 N/mm252 N/mm2
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 %

  • Chemical Admixtures complying with BS EN 934-1:2008 and ASTM C494
  • Fly Ash complying with BS EN 450
  • Ground Granulated Blast Furnace Slag (GGBFS) 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

  • Sustainable and high performing Structural concrete for buildings, commercial and infrastructure projects
  • Sustainable and durable concrete structure from foundation to roof
  • High durable road construction
  • Ideal solution for concrete elements in contact with marine environment and aggressive soil or underground water such as sulphate, chloride and acids
  • Easy pumpable concrete with fast casting and demolding
  • Large-scale infrastructure development projects with bulk cement requirements
  • High-rises and large-scale housing and commercial projects with the requirement for sustainable high performing concrete
  • Concrete with low carbon footprint

Features and Benefits

Sustainable High Performing Cement

While OPC undergoes one reaction to form calcium-silicate hydrate gel (C-S-H) – the glue that holds concrete together – INSEE PCC CEMENT undergoes THREE reactions with INSEE’s trademarked SmartActTM Technology, promoting refinement of the pore structure of matured concrete. INSEE PCC CEMENT first undergoes the hydration reaction. This is followed by the pozzolanic reaction. A third nucleation reaction unique to INSEE PCC CEMENT further accelerates the hydration and formation of additional carbonate aluminate hydrate (C-A-H) growing between the capillarity pores, resulting in a denser microstructure as well as higher strength and durability at each level of maturity.

Higher Sulphate and Chloride Resistance

The very dense microstructure and low porosity makes INSEE PCC CEMENT the ideal product to be used in constructions in aggressive environments that contain sulphate in ground water or soils, salts and acids or any other exposure conditions.

Alkali Aggregate Reaction (AAR) Resistance

Fly ash and slag as cementitious constituents used in INSEE PCC CEMENT reduces the alkali aggregate reaction (AAR) by bonding chemically the soluble alkalis in the cement

Mass Pouring

Featuring low heat of hydration development at early age, INSEE PCC CEMENT is highly recommended for mass concrete works, and the preferred solutions in hot weather conditions especially in tropical countries.

Environmentally Friendly

the new INSEE PCC contains up to 35% less clinker in its composition. INSEE PCC CEMENT also has an optimum particle size distribution with a high packing density which results in superior fresh and hardened concrete properties with high water retention, thus reducing the required mixing water to achieve the desirable workability with potential mix design and cost optimisation.

Superior Workability

The finely engineered particles of high-grade calcium carbonate (CaCO3), finely blended slag, and spherical fly ash particles all act as lubricant, reducing water demand for the mixture while also increasing the fluidity and workability of the cement.

Water Protect

Rainwater enters concrete through open pores and capillary voids. The new INSEE PCC CEMENT formulation results in a very dense and impermeable concrete microstructure with very less voids and connected capillary pores. The optimal particle size distribution also means maximum packing density of the concrete, offering complete protection against water penetration and infiltration.

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