Siam City Cement (Lanka) Limited srilanka

INSEE Rapidflow Plus

INSEE Rapidflow Plus

High Performance Concrete

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


PROPERTY SLS 1247 : 2015
Compressive Strength (2 days) ≥ 10 N/mm2 <25 m2m
Compressive Strength (28 days) 42.5 – 62.5 N/mm2 55 N/mm2
Setting Time ≥ 60 minutes 130 – 140 minutes
Fineness Not Specified in Standard 410 – 430 m2/kg
Soundness < 10 mm < 1 mm
Relative Density Not specified in standard ~ 3.07
SO3 ≤ 3.5 % >3
Chloride ≤ 0.10 % <0.08
LOI Not specified in standard <3


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.