1. Roman Ecological Cement Products Private Limited (RECO)

2. Roman Ecological Cement Products Pvt. Ltd.

3. Early History of Roman Cement Research
FACT : 2000 year old Roman Cement used Volcanic Ash ( Class N)
RECO Started with varieties of Ash - Class C and Class F fly ash
RECO Examined the broad history of ash experiments
Tested mixture with a wide variety of global ashes, including Class C and Class F to achieve acceptable concrete strengths
Patented the ability to match the ingredients to the Ash in U.S.A, India and world wide
The history of fly ash research by RECO began as testing the properties of Portland Cements blended with sources of fly ash

4. What is Roman Ecological Cement - RECO
Roman Ecological Cement is a mineral admixture for normal Portland Cement, HVFA (High Volume Fly Ash) cement and concrete mixture
Primary Ingredients
Fly ash (Class C, Class F, Pond Ash or Fly Ashes which do not meet C618 Standard Specification)
Secondary Ingredients
Reactive Pozzolanic material
Proprietary Binder
It is formulated to enhance strength, durability, impermeability and workability of fresh concrete.

5. OBJECTIVES
Provides a High Performance Cement Superior to Ordinary Portland Cement (OPC )
Produce Cement at a Lower Cost than OPC
Greatly reduces Air pollution (Carbon Emissions) associated with OPC
Reduces Permeability - The Main Cause of concrete decomposition and failure

6. Fulfilling Our Objectives
Utilize Fly Ash not presently usable SCM
Utilize in-spec and off-spec ash
Utilization of Ash meeting C618, which is not accepted by the cement industry
Utilize low cost Ash reclaimed from ponds
Accomplishments
Reduced total cementitious materials requirement
- Leaner mix -> % cost savings
Reduced Water/ Cement ratio by %
Reduced energy needs and CO2 Emissions

7. Reduce Energy Needs and CO2

8. Low Permeability
ASTM C 672- Scaling Resistance(average of three specimen)
ASTM C 672- Rapid Chloride Permeability ( average of three specimen)

9. Technology
Combine OPC, Fly Ash and RECO Cement additive(RCA) as partial cement replacement.
RECO Binder 15 – 20%
OPC 25 – 50%
Fly/ Pond Ash 30 – 50%
Up to 70% OPC Replacement

10. Under the Microscope
“…a unique Combination of Hydration and Pozzolanic Reactions are the main mechanisms of hardening and strength gain within Reco Cement based products”
Typical microstructure of concrete made using RECO Additives

11. 100% OPC vs. 50% replacement of OPC with Roman Cement Additive

12. Higher Compressive Strengths
ASTM C 39 – Compressive strength(Average of three 4”x8” cylinders) ASTM C 666 – Freeze- Thaw Resistance(Average of three specimen)

13. High Volume Fly-Ash 65% Replacement of OPC

14. 100% OPC vs 65% Replacement

15. Class F High LOI(3%) India

16. 100% OPC vs 50% OPC, 50% India Class F High LOI(3%) Fly Ash, and RECO

17. 100% OPC vs 30% OPC, 70% India Class F High LOI Fly Ash, and RECO

18. Recent Testing

19. One Year Old Testing

20. 73% Replacement of OPC Using Fly-Ash

21. High Strength achieved in precast using High LOI (3%) Fly-Ash(Barbados) 50% Replacement of OPC

22. Class F High LOI (10%) (Hawaii)

23. RECO TESTING
We are constantly testing and improving our products

24. How does Blended Cement with RECO Cement affect Concrete Properties ?
Fresh concrete effects are all favorable
Lower water demand, slump loss
Excellent finishing properties
Setting: Generally No Change for straight cement systems
Similar response to admixtures - accepts traditional admixtures
Strength development: at least equivalent
Rate of strength gain and ultimate strength have shown to increase by minimum 15-20% over time
Reduced thermal cracking
Heat of hydration and durability attributes are significantly improved
Meets ASTM C595 Specification (hydration, shrinkage, expansion)
Meets General Purpose Cement Specs

25. How to Implement Roman Cement in a Ready Mix Facility
Incorporate RECO Binder by utilizing exiting Silo for Fly-Ash

26. Manufacture a Superior Cement Product with a Strong Profit Margin with Minimal Plant set-up costs
OPC
FINISHED
PRODUCT
MIXER
RECO Binder

27. How to implement RECO Binder, in to existing cement manufacturer
Reco Cement Binder is added at ball mill stage

28. How is it made, and what’s different about it ?
A metered proportion of crushed, dried limestone and Glass is fed to the grinding mill along with clinker, gypsum, fly-ash and/ or slag
The RECO Cement Additive is more easily ground than the clinker(which is harder) and becomes concentrated in the finest particles
Overall fineness must be higher(for equivalent performance) in order for fineness of clinker fraction to be similar to OPC
- Production rate is slowed
- Some additional grinding energy is required but is more than offset
by lower clinker content and related kiln savings
Particle size distribution is enhanced
Hydration is enhanced by both physical and chemical interaction greater overall Cementitious efficiency is possible
Sustainability benefits are significant via reduced associated carbon emission and embodied energy(less clinker)

29. What’s different about RECO Cement?
Summary
What’s different about RECO Cement?
Higher Strength
Longer Durability
Lower life cycle Cost
Uses Recycled or local materials in the mix
Improved Workability
Reduced water requirement
Lower Heat of Hydration and thermal cracking during setting
Low Permeability

30. RECO Research Center

31. RECO Current Customers
Holcim(USA)
LaFarge(USA)
TCL(Caribbean)
Finja(Sweden)
WeEnergies
(WeEnergies is the largest power company in Wisconsin and is funding another plant for RECOCement in Wisconsin to utilize their fly ash)
Ozinga (Chicago lllinois)
Green Building Products
Preconco (Bardados)
Precasting
Omya (USA)
RamRock (USA)
Quikrete (USA)
(Large US Manufacturer of Bagged and Specialty Cements)

32. Thank You for your undivided attention Navrattan – RECO – India
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