High Range Water Reducer Air-Entraining Admixture （MNC-HAJ）

Description

MNC-HAJ is an air-entraining admixture which generates a highly stable air void system for increased protection against damage from freezing and thawing, severe weathering, or deicer chemicals. MNC-HAJ is a complex mixture of organic acid salts in an aqueous solution specifically formulated for use as an air-entraining admixture for concrete and is manufactured under rigid control which provides uniform, predictable performance. It is supplied ready to use and does not require pre-mixing with water.

MNC-HAJ is a compound concrete admixture. It has small addition rate, but multiple functions. It can effectively increase the durability of concrete. It is particularly effective in the concrete requiring frozen resistance, low permeability, water repellent, and durability. It meets the requirements of ASTM C 260, AASHTO M 154, and CRD-C 13..

Uses

MNC-HAJ is used in ready-mix, block, and concrete products plants to improve air entrainment stability. It is particularly effective in maintaining air content during longer haul times. MNC-HAJ performs well in conventional concrete and is effective in plasticizing mixes and with slag, lightweight, or manufactured aggregates which tend to produce harsh concrete. MNC-HAJ entrains air effectively with microsilica concrete and with fly ash concrete.
The air-entraining efficiency of MNC-HAJ becomes even greater when used with water-reducing and set-retarding agents. This may allow a reduction of up to 2.3 in the amount of MNC-HAJ required for the specified air content.

Advantages

MNC-HAJ can increase concrete workability and plasticity, reduce bleeding and segregation, improve permeability by 10% to 20%.It can lower the coefficient thermal diffusion and conductivity so that the volume stability and durability for outdoor concrete are improved:

• Can be used to make freeze-thaw resistant concrete, water repellent, sulfate resistance concrete, light-weight aggregate concrete, decorative concrete, and improve artificial aggregate concrete, common concrete, concrete bleeding and lean concrete
• Concrete constructions requiring high durability and anti freezing/thawing such as river dam, airport runway, highway, cooling towel, pool, port and ocean projects
• Concrete constructions for highway and bridges in the region that using salt in winter Applicable for constructions requiring high workability
• Mixable with other additives to make compound admixtures
• Not suitable for curing-concrete and pre-stressed concrete

Features

MNC–HAJ can increase concrete workability and plasticity, reduce bleeding and segregation, improve permeability by 10% to 20%. It can lower the coefficient thermal diffusion and conductivity so that the volume stability and durability for outdoor concrete are improved

• Can be used to make freeze-thaw resistant concrete, water repellent, sulfate resistance concrete, light-weight aggregate concrete, decorative concrete, and improve artificial aggregate concrete, common concrete, concrete bleeding and lean concrete
• Concrete constructions requiring high durability and anti freezing/thawing such as river dam, airport runway, highway, cooling towel, pool, port and ocean projects
• Concrete constructions for highway and bridges in the region that using salt in winter
• Applicable for constructions requiring high workability
• Mixable with other additives to make compound admixtures
• Not suitable for curing-concrete and pre-stressed concrete

Addition Rates

Trial mixtures or prior experience with the job materials and job equipment is necessary to determine the proper dosage and minimum mixing time. Recommended Addition rate: Add 1% for mortar or concrete.