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For more information please visit: http://yara.co.uk/chemicals/speciality-chemicals/concrete-accelerator-admixture/ Concrete and Calcium Nitrate An Introduction to Performance Concreting Presentation Summary What is Concrete? A fundamental material to modern life What is Calcium Nitrate? A useful molecule What is NitCal™? A Multifunctional Concrete Admixture What is Concrete? Concrete The largest unreinforced concrete dome in the world Reinforced concrete is at the basis of modern urban life Reinforced concrete continues to be used to create the world’s most impressive structures Calcium Nitrate Calcium Nitrate was the first synthetic nitrogen fertilizer compound manufactured Yara – the Global Leader in Nitrates Founded in 1905, over a century of nitrogen chemistry expertise Production Scale: Global No.1 in Calcium Nitrate production Global No.1 in Nitrates production (several grades) Global No.1 in NPK fertilizers production Research: Continuous nitrogen chemistry R&D at our centers in Norway and Germany Headquartered in Oslo, Norway What is NitCal™? What is NitCal? Yara’s NitCal provides calcium nitrate for concrete admixtures NitCal supports concrete chemistry calcium is beneficial for the essential reactions nitrate is easily integrated into the cement’s crystal matrix From Cement to Concrete How does NitCal work? NitCal significantly reduces setting time across a wide temperature range NitCal increases long-term strength significantly unlike sodium nitrate by formation of additional calcium silicate hydrates NitCal provides calcium nitrate in an easy to handle and environmentally friendly format NitCal is chloride free according to industry standards Cement Hydration The Multifunctional Concrete Admixture Indicative Applications and Dosing Rates Where is NitCal available? NitCal is available globally and quickly due to Yara’s unique distribution network NitCal production is ISO certified and its principal source is the Yara plant located in Porsgrunn, Norway Yara has a solid global presence What NitCal is NOT? NitCal is NOT a CE marked admixture and Yara not consumer product producer NitCal is NOT a hardening accelerator (unwanted overheating is therefore minimized) NitCal is NOT an activator for granulated slag
Citation preview
Concrete and Calcium Nitrate
An Introduction to Performance Concreting
Dr.-Ing. Wolfram Franke Yara Industrial
Application Development Yara Technology Center
1. What is Concrete? A fundamental material to modern life
2. What is Calcium Nitrate? A useful molecule
3. What is NitCal™? A Multifunctional Concrete Admixture
Presentation Summary
What is Concrete?
Concrete
Concrete is the most widely usedman-made material in the world
Concrete was invented over 2000 years ago
Concrete consists of aggregatesembedded in a hard matrix of cement
The Roman Empire was built on concrete
Jimmy Walker
The largest unreinforced concrete dome in the world
The Pantheon, Rome:
• Built in AD126
• 43.3m wide, 43.3m high
Reinforced concrete was invented in 1853 by a plasterer from Newcastle called Wilkinson
Reinforced concrete is at the basis of modernurban life
Our cities are built on reinforced concrete
Reinforced concrete continues to be used to create the world’s most impressive structures
Le PortageNicolas Lannuzel
Burj Khalifa, UAE
Three Gorges Damn, PRC
Calcium Nitrate
Calcium Nitrate was the first synthetic nitrogen fertilizer compound manufactured
…and a key enabler of the surge in agricultural yields achieved during the twentieth century
Yara – the Global Leader in Nitrates Founded in 1905, over a century of nitrogen chemistry
expertise
Production Scale: – Global No.1 in Calcium Nitrate production– Global No.1 in Nitrates production (several
grades)– Global No.1 in NPK fertilizers production
Research: Continuous nitrogen chemistry R&D at our centers in Norway and Germany
Headquartered in Oslo, Norway
What is NitCal™?
What is NitCal?
Yara’s NitCal provides calcium nitrate for concrete admixtures
NitCal supports concrete chemistry calcium is beneficial for the essential reactions
nitrate is easily integrated into the cement’s crystal matrix
From Cement to Concrete
CementWater
Cement Paste Sand
Gravel StonesMortar
Concrete
Admixtures
CementReplacement
Materials*
• General: Water / Cement = 0,4…0,6• Mortar: Sand / Cement = 3• Concrete: (Sand, Gravel, Stone) / Cement = 6• Cement Replacement Materials: replace up to 35% of cement weigth• Admixtures: added with up to 5% of cement weight
How does NitCal work?
NitCal significantly reduces setting time across a wide temperature range
NitCal increases long-term strength significantly unlike sodium nitrate by formation of additional calcium silicate hydrates
NitCal provides calcium nitrate in an easy to handle and environmentally friendly format
NitCal is chloride free according to industry standards
Water CaSO4 x Water= Etringite
CaSO4
C2S & C3S
C3A & C4AF
Calcium Hydroxideprecipitationand start ofCSH formation
Continous CSH formation
Continous CSH formation, AFt&AFm formation
Time HardeningSetting
Temperature
Strength
Cement Hydration
NitCal reduces time untilsetting by providing additional Calcium. Nitrate is absorbed by AFm later on.
Setting Accelerator
Cold Weather Concreting (Super Antifreeze, Freeze-Thaw Resistance)
Long-term Strength Enhancer
Corrosion Inhibitor
Hot Weather Concreting
The Multifunctional Concrete Admixture
NitCal
Indicative Applications and Dosing Rates
NitCal is available globally and quickly due to Yara’s unique distribution network
NitCal production is ISO certified and its principal source is the Yara plant located in Porsgrunn, Norway
Where is NitCal available?
Yara has a solid global presence
Yara plantsJoint ventureSales officesDevelopment programsR&D Units
NitCal is NOT a CE marked admixture and Yara not consumer product producer
NitCal is NOT a hardening accelerator (unwanted overheating is therefore minimized)
NitCal is NOT an activator for granulated slag
What NitCal is NOT?
• Yara disclaims all responsibility and liability for any expenses, losses, damages and costs incurred as a result of relying on or using the information contained in this document. Yara reserves the right to adjust and revise this document at any time.
• Any forward-looking statement made by Yara in this document is based only on information currently available to Yara and speaks only as of the date on which it is made. Yara undertakes no obligation to publicly update any forward-looking statement.
• No rights, including, but not limited to, intellectual property rights, in respect of this document are granted to any recipient unless specifically stated.
• ©Yara International ASA. All rights reserved.
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