FAIRCRETE AE
WATER REDUCING AIR ENTRAINING AGENT

BENEFITS

-› IMPROVED QUALITY : Increases workability and cohesion, assist in
   producing a dense, uniform, close- textured surface free from
   segregation, and bleeding and improves impermeability of concrete
   structure and also makes it less prone to cracking.

-› INCREASED COHESION : Entrained micro-bubbles of air assist in
   producing cohesion concrete significantly reducing segregation and
   bleeding, even when poor aggregate or sand gradings have to be used.

-› INCREASED DURABILITY : Improves workability increases compaction
   whilst the controlled air entrainment considerably enhances resistance to
   attack by frost or salts by reduction of initial surface absorption of the
   hardened cocrete.

USES
Improves the quality and long term durability of concrete exposed to severe weathering conditions. Increases the resistance of concrete to damage by seawater, frost and de-icing salts and also makes concrete structures less prone to cracking. Reduces the permeability of low cement content for mass pours such as dams and breakwaters. Is an ideal pumping aid to maintain cohesiveness and minimise segregation where concrete is placed mechanically.

DESCRIPTION
FAIRCRETE AE is supplied as a dark brown liquid based on selected sugar reduced lignosulphonates combination with compatible surface active agents. FAIRCRETE AE acts at the interface of the cement-aggregate particles and mixing water to produce microscopic air bubbles evenly distributed throughout the concrete. The entrained air bubbles are of the optimum diameter and spacing to give durability under freeze-thaw or salt attack conditions whilst enhancing lubrication during placing. Increased durability: Improved workability increase compaction whilst the controlled air entrainment considerably enhances resistance to attack by frost or salts by reduction of initial surface absorption of hardened concrete. FAIRCRETE AE complies with IS-9103-1999, ASTM C 260 66 T.

PROPERTIES
CEMENT FINENESS AND CONTENT : The amount of air entrained reduces with an increase in cement fineness or content. AGGREGATE QUALITY : Site proporiton variations can adversely affect the degree of air entrainment. This is particularly relevant to the use of crushed aggregate during incliment weather. Excessive site contents may render FAIRCRETE AE ineffective. ORGANIC IMPURITIES : Carbon can reduce the effectiveness of FAIRCRETE AE. CONCRETE TEMPERATURE : A temp. increase will reduce air content. Rise from 10^OC to 30^OC may have the amount of air entrained. In practice, daily flutuations are smaller and do not cause significant variation. SETTING TIME : Negligible effect at normal dosage rate. COMPATIBILITY : FAIRCRETE AE can be used with all types of Portland cements and is generally compatible with other admixtures. It is recommended that all admixtures be added to concrete separately. REDUCED PERMEABILITY : The microscopic air bubbles introduced by use of FAIRCRETE AE break up the capillary structure within concrete and hence reduce water permeability. DURABILITY : The action reducing the water permeability of concrete offers increased resistance to weather exposure and attack in aggressive environments. COMPRESSIVE STRENGTH : A 15% free water reduction is often possible with FAIRCRETE AE. The possible normally offsets the anticipated strength loss associated with air entrainment, thus producing air entrained concrete with no increase in cement content.

PACKING
1, 10, 20, 50, 100 litres carboys.

INSTRUCTIONS FOR USE
DOSAGE : The optimum dosage is best determined by site trials with the actual concrete mix which enables the effect of workability and air content to be measured. The rate of addition is generally within the range 100 ml to 300 ml FAIRCRETE AE per 50 kg. cement according to the air content required. A dosage of 150 ml to 50 kg cement is normally sufficient to obtain 5% air entrainment. MIX DESIGN : Where FAIRCRETE AE is used in an existing mix design, the cement and aggregate proportions should be adjusted to take into account the increase in yield. The sand content can normally be reduced by about 20 kg/m³ for each additional 1% of air entrained. CURING : Efficient concrete curing is essential and is best achieved by use of FAIRCURE C spray applied curing compound. If traditional methods such as water spray or wet hession are used, they must be carried out thoroughly. CLEANING : Spillages of FAIRCRETE AE can be removed with water. OVERDOSING : An overdose of double the recommended measure of FAIRCRETE AE will increase workability and air content and can result in slight set retardation of the concrete. The ultimate strength of the concrete should not be impaired if advantage of the water reduction taken and the concrete is adequately cured.

SHELF LIFE
FAIRCRETE AE has a minimum shelf life of 12 months provided the temperature is kept within the range 2⁰C to 50⁰C. If the temperature exceeds 50⁰C in any respect, advice should be sought from the supplier.

HELATH & SAFETY
Any splashing on skin shall be washed off with clean water. If contact with eye occurs wash with clean water and seek medical advice

QUALITY ASSURANCE
Fairmate manufactures entire range of construction chemicals under compliance of ISO 9001-2000, ISO (EMS) 14001 & OHSAS 18001 (Occupational Health and Safety) certified by KPMG Peat Marwick.

TECHNICAL SERVICES
While new advances and changes will take place one thing will never change is quality and meeting special needs of customer. Our laboratory in Baroda and technical personnel & experts are available to provide additional information and technical assistance. We are eager to work with you in development of new product and solve your problem.