ADMIXTURES to CONCRETE In modern days Concrete without an Admixture Is an exception.

Slides:

Advertisements

Similar presentations

تم تحميل الملف من

Advertisements

High Performance Concrete

Civil Engineering Materials

Civil Engineering Materials

Reference Concrete Sidney Mindess J. Francis Young Prentice-Hall, Inc Chapters 3 and 4.

Reinforced Concrete Design

PC Cement Hydration PCC consists of binder and aggregates. Aggregates are typically used in two factions: fines and coarse. The binder phase normally.

POWER OF ADMIXTURES

Chapter 7 Portland Cement Concrete

Materials for Civil and Construction Engineers

Properties of Fresh Concrete

Specialty Concrete - High End Value Materials. High-Value Concrete n All concrete is high value! u Cost of material (small) u Cost of placement (significant)

Pozzolanic By-Products In Concrete Marcia C. Belcher, MSCE.

Introduction to Concrete

By PROF. ARUN KUMAR CHAKRABORTY Associate Professor Department of Civil Engineering Bengal Engineering and Science University Shibpur; Howrah – ;

Cement Replacement Materials. Cement replacement materials or mineral admixtures are materials used to contribute to the properties of hardened concrete.

Chapter 3. Obtaining Silica-Fume Concrete  Specifying Silica Fume and SFC  Proportioning SFC  Producing SFC.

ADMIXTURES It is defined as a material other than water, aggregate and cement that is used as an ingredient of concrete to modify the properties of fresh.

High-Performance Concrete. Characteristics of High- Performance Concretes n High strength n High early strength n High modulus of elasticity n High abrasion.

How long will your concrete bridge last?

Joshua Murphy Sales Engineer Master Builders Technologies

KING SAUD UNIVERSITY COLLEGE OF ENGINEERING CIVIL ENGINEERING DEPARTMENT Students Names: Abdulrahman Albedah Ali Al-theeb CE-477 Supplementary.

Strength of Concrete.

Mix Design Review.

Supplementary Cementing Materials

Topic : MIX DESIGN OF CONCRETE Properties of concrete Submitted To: DR. AYUB ELAHI Submitted By: SOHAIB NASEER 2K9-scet-29/CIVIL M.ZAEEM FAKHAR 2K9-scet-03/CIVIL.

Holly Holevinski Cement + water = paste Aggregates: Coarse (>1/4”) Fine (

ADMIXTURES Department of Civil Engineering,

“Properties of Concrete” Introduction

Concrete Unit 24 Carpentry and Building Construction.

4.7.2 High-strength Concrete (HSC) Introduction –Definition –Classifications Choice of HSC raw material –Binding material –Excellent aggregate –Superplasticizer.

4.7.4 Pumped Concrete Introduction Requirements of Raw Material Mix ratio Design of Pumped Concrete.

Composition of cement paste, concrete admixtures and mix design of superplasticized concrete Exercise 4.

Design of Concrete Structure I Dr. Ali Tayeh First Semester 2009 Dr. Ali Tayeh First Semester 2009.

Concrete Technology Ch8: Proportioning Concrete Mixes Lecture 14 Eng: Eyad Haddad.

Mineral-based secondary binders, utilization, and considerations in mix design Exercise 5.

–Mineral Admixture –Ordinary Portland Cement (P.O) –Portland granulated Blast-furnance-slag Cement (P.S) –Portland-Pozzlana Cement (P.P) –Portland fly-ash.

Mix design of self consolidating concretes Exercise 8.

Mix design of high strength concrete, special cases in mix design Exercise 7.

Eng. Malek Abuwarda Lecture 12 P1P1 Construction Methods Lecture 12 Production of Aggregate and Concrete.

Introduction  Civil Engineering Materials -Concrete, Steel, Pavement  Construction Materials Timber, Glass, Aluminum, Paint, Plastic, Masonry, Ceramic.

G.GUNA S.R.V.E.C 1 Admixtures are the material, other than Cement Water Aggregates fiber reinforcement Which are used as an ingredient of concrete and.

1.Initial setting time of cement:  40 to 60min  30 to 60min  15 to 60min  35 to 60min.

Supplementary Cementitious Materials Design and Control of Concrete Mixtures – Chapter 4.

Necessary Information Required compressive strength at 28days: 30 Mpa Type of structure: mass concrete, beam, column. Maximum size of aggregate: 20 mm.

Polymer Modified Steel Fiber Reinforced Concrete

YOUSIF RASHEED HASSAN MSc SIMENAR : SUSTAINABLE CONCRETE.

Concrete Technology HINDUSTAN CONSTRUCTION CO. LTD. HINCON HOUSE, L. B. S. MARG, VIKHROLI (WEST), MUMBAI – INDIA.

Rajan singh rawat INTRODUCTION Admixtures are ingredients other than basic ingredients cement, water and aggregates that are added to.

Cement and Concrete Concrete is an artificial conglomerate,with the following constituents: Cement Aggregate Water Cement replacements and admixtures.

Concrete Man made stone.

How long will your concrete bridge last?

CONCRETE CHEMICALS & APPLICATIONS

REPLACEMENT OF CEMENT BY SILICA FUMES AND FLY ASH

Chemical Admixtures In Concrete

CONCRETE MIX DESIGN.

BY Fazal Wadood Class no. 38 UET Peshawar Jalozai campus

Silica fume The transition zone is a thin layer between the bulk hydrated cement paste and the aggregate particles in concrete. This zone is the weakest.

FLY ASH USE AS A REPLACEMENT OF CEMENT

1. Characteristic and Mix design proportions

USE OF MINERAL ADMIXTURE IN CONCRETE

Seminar On NANO CONCRETE

Ultra High Performance Concrete (UHPC)

A STUDY ON HIGH PERFORMANCE CONCRETE WITH FLY ASH AND SILICA POWDER

ADMIXTURES???? Materials added to the concrete besides cement, water and aggregate. To improve the properties of the concrete required. Admixtures can.

How long will your concrete bridge last?

SUPER POZZOLANS :RICE HUSK ASH & MICROSILICA.

Silica Fume and Fly ash 5 minute Flash Mohamed Wagih

High-Performance Concrete

Presentation transcript:

ADMIXTURES to CONCRETE In modern days Concrete without an Admixture Is an exception

Typical Results with Plasticizers TestCement kg/m3 Dosage Lit/50kg W/CSlump mm UCS (N/mm2) 7 days 28 days Control Workability increase Strength increase Cement saving

Superplasticiser

Effect of Retarding Superplasticizers at high temp. TestTempConcrete Slump (mm) 0-h1-h2-h3-h4-h5-h Control Admixture Control Admixture

Effect of Accelerating Plasticizers at low Temp. TempMixW/CUCS (N/mm2) Slump = 25mm Cement = 300 kg 1 Day3 Day7 Day28 Day 2 0 C Control Admixture C Control Admixture C Control Admixture

Pozollanic Admixtures –Metakaolin –Surkhi –Fly-ash GGBFS Silica Fumes MINERAL ADMIXTURES

Fly- ash Lower heat of hydration Increased water tightness Lower susceptibility to leaching Low thermal shrinkage Reduced alkali aggregate reaction Improved resistance to sulphate attack Improved workability Lower cost

Influence of Fly ash content on strength of concrete

GGBFS Obtained as a by-product in the making of steel

GGBFS AND PORTLAND CEMENT

Denser Microstructure Better long term strength Slower heat development Durability is better Alkali-silica reaction eliminated Lower slump loss GGBFS

Silica Fume A by product in the making of Silicon / Ferrosilicon from Carbon or Quartz in Electric Arc Furnace

Compressive strength of concrete with different contents of Silica

Mix Proportion of Some High Performance Concretes IngredientsMix (kg / m3) ABCDE Portland Cement Silica Fumes Fly ash GGBFS Fine Aggregate Coarse Aggregate Total water Water/cementitious Slump (mm) Strenth (Mpa) 1 day days days days

HYDRATION

Compressive strength of concrete with different contents of GGBFS