PPT-CHAPTER 2 WATER REDUCING ADMIXTURES

for CONCRETE 1 TYPES OF WATERREDUCING ADMIXTURES Normal waterreducing Acceleratingwaterreducing Retardingwaterreducing Following functions can be performed with these admixtures Increase in workability slump compacting factor VeBe. We start with a simple proposition If we stop thinking of the poor as victims or as a burden and start recognizing them as resilient and creative entrepreneurs and valueconscious consumers a whole new world of opportunity will open up Four billion p Admixtures should never be regarded as a substitute for good mix design good workmanship or use of good materials 1 uses of admixtures The most common reasons for using admixtures in concrete are To increase workability without changing water conten 33Benefits of Reducing Water Lossof Reducing Water Loss Concrete is essentially made from five materials. . 1. Air . 2. Water. 3. Cement 1+2+3=paste . 4. Fine aggregate 1+2+3+4=grout or mortar . 5. Course aggregate 1+2+3+4+5=concrete . Definition. An . admixture is a material added to the batch of concrete before or during its mixing to modify its freshly mixed, setting or hardened properties. . Admixtures. are material added to concrete mix in order to modify its properties. Usually it is not more than 5% by mass of cement and should always follow the manufacturer recommendations. . Additives. Reduce, Reuse, Recycle. Group 3. Reduce. Reducing water is simply using water only when we need it.. For example,. We should turn off the shower tap while soaping.. Use a tumbler when washing your teeth.. Reducing & . Nonreducing. . Sugars in Honey. IUG, Fall 2013. Dr. . Tarek. . Zaida. 1. Background. Carbohydrates with free . aldehyde. or . ketone. group have the ability to reduce Cu. 2 . 1. EFFECTS OF AIR ENTRAINMENT. Durability. The main usage of air entrainment is to enhance the durability of concrete. . against cycles of climatic freezing and thawing and against the effects of de-icing salts (. CONCRETE. Prof. . Dr. Özgür EREN. Department of Civil Engineering. Eastern Mediterranean University-Gazimağusa-N.Cyprus. 2017. 1. CHAPTER 1. AN INTRODCUTION TO, AND A CLASSIFICATION OF, CEMENT ADMIXTURES. Charles . Nmai. , Ph.D., P.E., FACI. BASF Corporation (Admixture Systems). Beachwood, OH 44122. Code and Standard Specification Provisions for Discharge of Concrete. ASTM C94/C94M. ACI 318-14; ACI 301-10. Admixtures for Concrete Pipe Jason D. Wimberly, PE, MCE GCP Applied Technologies January 16, 2018 Concrete of Today A modern wetcast concrete is more than a mixture of cement, aggregate and water Chemical Admixtures for Concrete Pipe Ver 1.1 Ed Mansky Grace Construction Products Febuary 11, 2014 Concrete Admixtures Learning Objectives Provide an introduction of chemical admixtures for use in concrete Admixtures for Concrete Pipe Concrete of Today A modern wetcast concrete is more than a mixture of cement, aggregate and water ADMIXTURES and Supplementary Cementitious Materials (SCM) are becoming as ESSENTIAL as PORTLAND CEMENT when making modern concrete ADMIXTURES FOR CONCRETE Concrete is essentially made from five materials. 1. Air 2. Water 3. Cement 1+2+3=paste 4. Fine aggregate 1+2+3+4=grout or mortar 5. Course aggregate 1+2+3+4+5=concrete