IMAGINE

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RECO CEMENT PRODUCTS (Roman Ecological Cement)
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What is Roman Ecological Cement - RECO?

• It is a mineral admixture for normal
• Portland cement, HVFA (High Volume Fly Ash)
• cement and concrete mixtures
• Primary ingredients
• Fly ash (Class C, Class F, Pond Ash and/or Slag
  meeting
• (in spec or out of spec) ASTM C618 Standard
  Specification
• Secondary ingredients
• Proprietary Binder
• It is formulated to enhance strength, durability,
  impermeability, and workability of fresh concrete.

2000 Year Old Pantheon
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Early History of Reco Cement Research

• FACT 2000 year old Roman Cement used Volcanic
  Ash (Class N)
• RECO Started with varieties of Pozzolans
  including Class C and F Fly ash, and also Slag
• RECO Examined the broad history of ash used in
  cements
• 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 USA, India, and World wide
• The history of fly ash research by RECO began as
  testing the properties of Portland Cements
  blended with different sources of fly ash.

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OBJECTIVES

• Provide a High Performance Cement Superior to
  OPC
• Produce Cement at a Lower Cost than OPC
• Reduce the Air pollution (Carbon Emissions)
  associated with OPC
• Reduce Permeability - (the Main Cause of
  concrete decomposition and failure)
• Ability to Utilize any Fly Ash with a wide
  variation of mineral differences.

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Fulfilling our Objectives

• Utilize Fly Ash not presently usable SCM
• Utilize in-spec and off-spec ash in greater
  amounts ( as much as 50 to 75)
• Utilization of Ash meeting C618, which is not
  accepted by the cement industry
• Utilize low cost Ash reclaimed from ponds
• Reduced total cementitious materials requirement
• Leaner mix ? 10-30 cost savings
• Reduced Water/Cement ratio by 10-20
• Reduced energy needs and CO2

Accomplishments
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Reduce Energy Needs and CO2
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Low Permeability
ASTM C 672 Scaling Resistance (average of three
specimen
Scaling Resistance Reco Cement Control Mix
50 cycles Rating 2 (slight scaling) Rating 2 (slight scaling)
ASTM C 672 Rapid Chloride Permeability (average
of three specimen
Rapid Chloride Permeability Reco Cement Control Mix
28 days 1753 coulombs (low) 4184 coulombs (high)
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Higher Compressive Strengths
ASTM C 39- Compressive Strength (Average of three
4 x 8 cylinders
Compressive Strength Reco Cement Control Mix
7 Days 5450 psi 4220 psi
28 Days 7410 psi 5140 psi
ASTM C 666- Freeze-Thaw Resistance (Average of
three specimen)
Durability Factor Reco Cement Control Mix
300 Cycles 90.6 90.1
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Technology

• Combine OPC, Fly Ash and or Slag, and Reco Cement
  additive (RCA) as partial cement replacement

Fly ash/ Pond Ash 30 to 50
OPC 25 to 50
RECO Binder 15 to 30
RECO Cement
Up to 75 OPC replacement
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RECO TESTING
We are constantly testing and improving our
products
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High Volume Fly-Ash 65 Replacement of OPC
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(No Transcript)
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73 Replacement of OPC Using Fly-ash
Poured on September 2012
Slab as of September 2013
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High Strength Achieved in Precast using High LOI
(3) Fly-ash (Barbados) 50 Replacement of OPC
Poured on February 2013
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100 OPC vs. 50 replacement of OPC with Reco
Cement Additive
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100 OPC vs. 50 replacement of OPCHigh LOI (3)
Fly-ash and RECO
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Class F High LOI (8) (India)
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(No Transcript)
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Class F High LOI (10) (Hawaii)
Pour on October 2011
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One Year-old Testing
Salt Water 6 Bag (C Ash)
50 Replacement with Class C Fly Ash (6 bag)
50 Replacement with GGBS 7 Bag Mix
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How does Blended Cement with Reco Cement affect
Concrete Properties?

• Fresh concrete effects are all favorable
• Lower water demand, Lower Slump
• 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 and ASTM 1157 Specification (
  hydration, shrinkage, expansion)
• Meets General Purpose Cement Specs

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How to Implement Roman cement in a Ready Mix
facility
Add an extra silo for RECO Binder and a silo
for Fly Ash if needed (Most RMC plants already
have FA Silos)
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How to implement RECO into an existing cement
manufacturer Reco Cement Binder is Ground and
mixed in a ball mill
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RECOs effects on Cement Production

• A Metered proportion of RECO Additive is fed to
  the finish 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 the 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 fuel 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)

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Manufacture a Superior Cement Product with
Minimal Plant set-up Costs
FA
OPC
Finished Goods
Mixer
RECO Binder
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Summary Whats 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

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Reco Cement Contact Information

• David Lisowski
• CEO/Founder
• david_at_recocement.com
• 262-227-9406
• www.recocement.com
• RecoCement
• "Superior performance in Green Technology"
•