Transcript IMAGINE
RECO CEMENT PRODUCTS (Roman Ecological Cement) 1 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 2000 Year Old Pantheon • 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. 2 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. 3 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. 4 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 Accomplishments • Reduced total cementitious materials requirement – Leaner mix 10-30% cost savings • Reduced Water/Cement ratio by 10-20% • Reduced energy needs and CO2 Reduce Energy Needs and CO2 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) 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 Technology • Combine OPC, Fly Ash and or Slag, and Reco Cement additive (RCA) as partial cement replacement Fly ash/ Pond Ash 30% to 50% RECO Binder 15% to 30% RECO Cement Up to 75% OPC replacement OPC 25% to 50% RECO TESTING We are constantly testing and improving our products High Volume Fly-Ash 65% Replacement of OPC 100% OPC vs 65% Replacement 8000 7536 7000 6594 6000 5630 5254 5000 4495 Reco 4000 100% OPC 3000 27022825 2000 1000 0 0 3 Day 14 Day 28 Day 90 Day 73% Replacement of OPC Using Fly-ash Poured on September 2012 Slab as of September 2013 High Strength Achieved in Precast using High LOI (3%) Fly-ash (Barbados) 50% Replacement of OPC Poured on February 2013 100% OPC vs. 50% replacement of OPC with Reco Cement Additive 100% OPC vs. 50% replacement of OPC High LOI (3%) Fly-ash and RECO Class F High LOI (8%) (India) 100% OPC vs 70% replacement of OPC using India Class F High LOI Fly Ash, and RECO 7000 6501 5901 6000 5000 4728 4485 5630 4495 3968 4000 100% OPC 3000 2000 Reco 2465 17451860 1000 0 1 day 3 day 7 day 14 day 28 day Class F High LOI (10%) (Hawaii) Pour on October 2011 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 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 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) 22 How to implement RECO into an existing cement manufacturer Reco Cement Binder is Ground and mixed in a ball mill RECO’s 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) Manufacture a Superior Cement Product with Minimal Plant set-up Costs FA OPC Mixer RECO Binder Finished Goods Summary: What’s different about RECO Cement? • Higher Strength • Improved Workability • Longer Durability • Reduced water requirement • Lower life cycle Cost • Uses Recycled or local materials in the mix • Lower Heat of Hydration and thermal cracking during setting • Low Permeability Reco Cement Contact Information David Lisowski CEO/Founder [email protected] 262-227-9406 www.recocement.com RēcoCement™ "Superior performance in Green Technology"