Download RECO - Navrattan Group

Roman Ecological
Cement Products
Private Limited (RECO)
Roman Ecological Cement
Products Pvt. Ltd.
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
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.
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
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 ->10 - 30% cost savings
 Reduced Water/ Cement ratio by 10 - 20%
 Reduced energy needs and CO2 Emissions
Reduce Energy Needs and CO2
Low Permeability
 ASTM C 672- Scaling Resistance(average of three specimen)
 ASTM C 672- Rapid Chloride Permeability ( average of three
specimen)
Technology
Combine OPC, Fly Ash and RECO Cement additive(RCA)
as partial cement replacement.
Fly/ Pond Ash
30 – 50%
RECO Binder
15 – 20%
Up to 70% OPC Replacement
OPC 25 – 50%
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
100% OPC vs. 50% replacement
of
OPC with Roman Cement Additive
Higher Compressive Strengths
ASTM C 39 – Compressive strength(Average of three 4”x8”
cylinders)
ASTM C 666 – Freeze- Thaw Resistance(Average of three
specimen)
High Volume Fly-Ash 65%
Replacement of OPC
100% OPC vs 65%
Replacement
Class F High LOI(3%)
India
100% OPC vs 50% OPC, 50%
India Class F High LOI(3%) Fly
Ash, and RECO
100% OPC vs 30% OPC, 70% India
Class F High LOI Fly Ash, and
RECO
Recent Testing
One Year Old Testing
73% Replacement of OPC
Using Fly-Ash
High Strength achieved in precast using
High LOI (3%) Fly-Ash(Barbados) 50%
Replacement of OPC
Class F High LOI (10%)
(Hawaii)
RECO TESTING
We are constantly testing and improving our products
How does Blended Cement with
RECO Cement affect
Concrete Properties ?
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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
How to Implement
Roman Cement
in a Ready Mix Facility
Incorporate RECO Binder by utilizing exiting Silo for
Fly-Ash
Manufacture a Superior Cement Product
with a Strong Profit Margin with
Minimal Plant set-up costs
How to implement RECO Binder,
in to existing cement manufacturer
Reco Cement Binder is added at ball mill stage
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)
Summary
What’s different about RECO Cement?
 Higher Strength
 Improved Workability
 Longer Durability
 Reduced water requirement
 Lower life cycle Cost
 Lower Heat of Hydration and
 Uses Recycled or local
materials in the mix
thermal cracking during setting
 Low Permeability
RECO Research Center
RECO Current Customers
Holcim(USA)
LaFarge(USA)
TCL(Caribbean)
Ozinga (Chicago lllinois)
Green Building Products
Preconco (Bardados)
Precasting
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)
Omya (USA)
RamRock (USA)
Quikrete (USA)
(Large US Manufacturer of
Bagged and Specialty Cements)
Thank You for your undivided attention
Navrattan – RECO – India
For More Company Information
Click Below
http://www.romancementindia.com
http://www.recocement.com