Sustainable concrete

SUSTAINABLE CONCRETEA PON. RATHNAVEL PRESENTATION

GOOD MORNING

WHAT YOU DO TODAY CAN CHANGE YOUR TOMORROW!

INCLUDES• Introduction to Concrete• Introduction to Sustainability• Understanding Sustainable Concrete• 6 Sixes & Sustainable Concrete

INTRODUCTION TO CONCRETE

21 Essential Things

a Civil Engineer should know about concrete

TAMIL• The tamil word for concrete is

_____________

LATIN• The word concrete is derived from Latin

word conscretus which means _____________

MIXTURE• Concrete is a composite construction

material made up of _____________, ___________, ___________ and water. It should not be confused with mortar which is made up of __________, ____________ and water.

SINCE 6500 BC• The material used in concrete in place of

cement before 1800s was _____________

LIFE CYCLE• The stages in concrete are

Proc_____________Mi_______________Tra______________Pla______________Com_____________Cur______________Fin______________Har______________

SD• The two major properties of concrete due

to which it is widely used are s_____________ and d_____________

ACCELERATORS, RETARDERS, ENTRAINERS

• Apart from cement, coarse aggregate, fine aggregate and water, sometimes _____________ are added to concrete to give it certain characteristics.

The ___________ are broadly classified into two types namely m__________ and c____________ admixtures.

NO TENSION BRO• Concrete is normally strong in

___________ and weak in _____________

• Therefore to support ___________ of concrete, steel is added to concrete and this process is called ____________.

TYPES• Ordinary/Normal Concrete is made up of

_______________________ while Reinforced concrete is made up of _______________________________

TYPES

• Some major types of concrete are

High S_____________ Concrete

High P_____________ Concrete

Light ______________ Concrete

Pre _____________ Concrete

Self _______________ Concrete

Sp____________ Concrete

Su_____________ /Green Concrete

Rea______________ Concrete

MIXING• A concrete mix is designed to produce

concrete of low cost, easy placement and high strength & durability.

• The ratio of each material in concrete is important and affects the mix. This process of fixing proportion of each material is called _________________. The proportions of each material are based on __________ and not on ________.

M IS THE WORD• The mix proportioning of concrete leads

to the grade of concrete as

• In the grade, the number after letter M stands for ________________

Grade C FA CAM5 1 5 10M10 1 3 6M15 1 2 4M20 1 1.5 3M25 1 1 2

W/C• As the Water to _________ ratio

increases, the strength and durability of hardened concrete decreases.

• Therefore to increase the strength and durability of concrete, the Water-Cement ratio should be ___________

• The suggested W/C Ratio for our conditions is _____

CODE BOOK• The important IS code books relating to

concrete areS. No.

Code Book Description

1 IS 456 – 2000 Code of practice for plain and reinforced concrete

2 IS 1343 -1980 Code of practice for prestressed concrete

3 IS 4926 – 2003 Code of practice for readymixed concrete

4 IS 6461 – 1973 Glossary of terms relating to cement concrete

5 IS 10262 – 2009

Guidelines for Concrete Mix Proportioning

6 IS 13311 – 1992

Non Destructive Testing of Concrete

STAGES• Concrete can be divided into two distinct

stages namely _____________ concrete and _____________ concrete.

SIX FRESH PROs• The normal properties of a fresh

concrete areSet_______________Work______________Hyd_______________Air _______________Ble________________Seg________________

SIX HARD PROs• The normal properties of a hardened

concrete areStr_______________Mod______________Cre_______________Shr _______________Per________________Atta________________

The properties other than strength are called _____________

TESTING TIMES• The normal tests done in concrete are

For determining ________Slump Cone TestCompaction Factor Test

For determining __________Compression TestSplit Tensile Test

TESTING TIMES• The common NDT done on concrete are

Ultrasonic __________ Rebound ___________

CONSUME• The estimated annual consumption of

concrete worldwide every year is ____________ m3

DAY• The Indian Concrete Institute observes

_____________ as National Concrete Day

INTRODUCTION TO SUSTAINABLE DEVELOPMENT

We do not inherit the earth from our ancestorsWe borrow it from our children

SUSTAINABLE DEVELOPMENT• Development that meets the needs of the

present without compromising the ability of future to meet their own needs

SUSTAINABLE DEVELOPMENT• Development without damage to

Environment

SUSTAINABLE DEVELOPMENT• S ociety • E nvironment• E conomy

SUSTAINABLE DEVELOPMENT• 1972, Stockholm• 1987, Brundtland Commission• 1992, RIO – UNCED• 2002, Johanessburg• 2012, RIO - UNCSD

SUSTAINABLE DEVELOPMENT• The Tamil Word for Sustainable

Development is நிலை�யான அபிவிருத்தி or நிலை�யான

வளர்ச்சி

SUSTAINABLE DEVELOPMENT• One way to achieve Sustainable

Development is to adopt Green Buildings in place of common buildings

• Green Buildings are buildings thatuse energy efficient materialsuse materials that least affect environmentlimit impact on outdoor environmentprovide healthy indoor environment

SUSTAINABLE DEVELOPMENT• Green Buildings are designed,

standardized, developed and certified through international LEED(Leadership in Energy and Environmental Design)

• LEED is a green building design and development certification program to measure:

Sustainability Waste efficiency Energy and atmosphere Materials and resources Innovation and design

SUSTAINABLE DEVELOPMENT• Construction Industry is requested to

adopt sustainable construction to ensure sustainable development

• Sustainable constructions are those constructions which are concerned with the minimizing of environmental impact, while optimizing it economically

• Since most of our constructions deal with concrete, we need sustainable concrete for sustainable construction

UNDERSTANDINGSUSTAINABLE CONCRETE

Concrete with least impact to environment

SUSTAINABLE CONCRETE• Sustainable Concrete is defined as

concrete that uses less energy in its production & produces less carbon dioxide than normal concrete.

• It is also known as green concrete or eco friendly concrete

SUSTAINABLE CONCRETE• Sustainable Concrete strategies are

achieved following the Life Cycle Assessment (LCA) approach also known as Cradle to Grave approach

Production

Maintenance Demolition Disposal

ConstructionMaterials

SUSTAINABLE CONCRETE• There are many strategies to achieve

green concrete namely

• Use of eco friendly cement• Effective use of supplementary

cementitious material• Increased dependence on recycled

materials• Reuse of wash water

Materials for SUSTAINABLE Concrete

Fly Ash, Metakaolin, Silica Fume, Fly Ash, Slag, Calcined Shale


Fresh local aggregate Recycled Demolition Waste Aggregate

Recycled Concrete Material (RCM) Blast Furnace Slag (BFS)


Fly AshBlast Furnace Slag (BFS)

Manufactured Sand For Concrete Recycled Glass Aggregate

SUSTAINABLE CONCRETE• Other strategies to achieve sustainable

concrete are Rainwater Harvesting Reduction in Water Use Heat Island Ready Mixed vs Site Mixed Pre Cast vs Cast in Situ Normal vs Fibre Reinforcement

SUSTAINABLE CONCRETE• Some achievements by sustainable

concrete are

• 20% increase in use of waste materials• 25% reduction in weight of concrete• 30% reduction in CO2 emissions• 40% reduction in repair costs

SUSTAINABLE CONCRETE• It offers the following advantages when

compared to normal concrete

• Better Workability• Reduced Creep & Shrinkage• Good Thermal & Fire Resistance• Less Heat of Hydration

SUSTAINABLE CONCRETE• It offers the following disadvantages

when compared to normal concrete

• Split Tensile Strength is Less• Flexural Strength is Less• No big change in Compressive Strength• Less Life Time (Durability)

WHAT IS YOUR UNDERSTANDINGSUSTAINABLE CONCRETE?

Selecting Six of you to Share Six Learnings of the Session

THANK YOU

THE GREATEST THREAT TO OUR EARTH IS THAT SOMEONE ELSE WILL SAVE IT

Sustainable concrete

Engineering

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