INSEE Rapidflow Plus

INSEE RAPIDFLOW PLUS is a high performance Blended Hydraulic Cement of both ground granulated blast furnace slag (GGBFS) and fly ash variants, producing overall high performance and high strength concrete for industrial and infrastructure projects.

Produced with a perfected combination of cementitious binders that is the result of years of research and development, INSEE RAPIDFLOW PLUS develops high strength in concrete that allows a reduction in structural element sizes, contributing to the increased cost efficiency of the construction.

Fact File

Type :Blended Hydraulic Cement
Sri Lankan Standard :SLS 1247:2015
Strength Class :42.5N

PROPERTYSLS 1247 : 2015
Compressive Strength (2 days)≥ 10 N/mm2<25 m2m
Compressive Strength (28 days)42.5 – 62.5 N/mm255 N/mm2
Setting Time≥ 60 minutes130 – 140 minutes
FinenessNot Specified in Standard410 – 430 m2/kg
Soundness< 10 mm< 1 mm
Relative DensityNot specified in standard~ 3.07
SO3≤ 3.5 %>3
Chloride≤ 0.10 %<0.08
LOINot specified in standard<3
An average of internal test results.

INSEE RAPIDFLOW PLUS is compatible with:

  • Chemical Admixtures complying with BS EN 450-1:2014 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


  • High pumpable with fast pouring and consolidating concrete
  • Concreting in sulphate environments as in ground water or soil
  • Concrete infrastructures such as piling, bridge piers, etc.
  • Water structures/Spillways
  • Concrete structures exposed to chloride in marine environment seawater (harbours, jetties, bridges, buildings etc.)
  • Concrete structures in sewerage projects (treatment plants, sewer lines, etc.)
  • Concrete in contact with water (water supply projects, irrigation structures, canal systems, dams, etc.)
  • Large-scale infrastructure development projects with bulk cement requirements
  • High-rises and large-scale housing and commercial projects with the requirement for sustainable performing concrete
  • High load bearing precast and pre-stressed load bearing concrete elements

Features and Benefits

High Performance Concrete

INSEE RAPIDFLOW PLUS exhibits enhanced fresh and hardened properties of concrete including high strength, increased durability, lower permeability, increased corrosion resistance and reduced thermal stress to structures, resulting in the elevated overall performance of concrete structures.

High Strength Concrete

Both slag and fly ash display inherent chemical properties that produce additional calcium-silicate hydrate gel (CSH) – the glue that holds the concrete together – by continuously reacting with the water and other chemical elements in the mix over time. This results in denser concrete with enhanced strength that serves as a tool for engineers to optimize concrete mix designs.

Cost Efficient Concrete Mix Designs

The high strength developed in concrete produced with INSEE RAPIDFLOW PLUS allows for a large reduction of admixture and cement consumption in
the mix, reducing raw material costs to a great extent. It also leads to optimized structural design that allow for thinner, lighter and fewer structural elements. The optimized mix designs also result in less shrinkage, curling and heat, lowering life cycle costs through increased service life.

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