Batimix HWR 1200-A

Description

BATIMIX HWR 1200-A is a high-end water-reducing liquid admixture (superplasticizer) with improved properties for concrete. It is based on high quality naphthalene sulfonate materials mixed with selected chemicals to accelerate setting. It does not contain calcium chloride or other potentially corrosive ingredients

Main Purpose

BATIMIX HWR 1200-A is designed to improve the workability of concrete and/or allow effective reduction of free water content. This product is a very powerful dispersant, which works by electrostatic repulsion, breaking up agglomerates in the concrete mix. It achieves specified concrete strength levels, with significantly reduced cement content and/or increased workability. It is particularly used in cold climates to reduce concrete setting times. It speeds up finishing and stripping operations.

Applications using BATIMIX HWR 1200-A include all types of concrete castings, such as ordinary, reinforced, precast, ready-mixed, lightweight, pumped and shotcrete.

Features

Concrete prepared with BATIMIX HWR 1200-A is characterized by:

In the plastic state: • Greater fluidity without adding additional water • Reduced water content, up to 40%, with minimal side effects • Improved homogeneity, cohesion and ability to pump the concrete mix • Accelerated setting, particularly suitable for use in cold climates

In hardened state: • Better resistances - compression, bending and bonding • Reduced shrinkage, creep, water permeability and cracking • Increased durability and better surface appearance of concrete

Properties

• Appearance: brown liquid
• Specific Gravity: 1.20 ± 0.02 at 23 ºC
• Chloride content : nil
• Alkali content : typically less than 3% as Na₂O
• Air entrainment: less than 1.5% increase at normal dosages

Health and Safety

BATIMIX HWR 1200-A is not a hazardous material. However, it should not be swallowed or brought into contact with skin and eyes. Appropriate gloves and goggles should be worn. For more information, please consult the product safety data sheet.

Compliance with Standards

BATIMIX HWR 1200-A exceeds ASTM C 494 Type E and EN 934-2 : T12 requirements in terms of water reduction and/or slump improvement.

Dosage Rates

The optimum dosage of BATIMIX HWR 1200-A and its effect on the fresh and hardened concrete properties such as slump, slump retention, setting acceleration, and early strength gain should always be determined by trials. Testing should be done using the actual concrete composition and under the conditions that will be experienced on the field. For indication purposes, BATIMIX HWR 1200-A should be used at dosage rates varying from 0.6% to 3% of the cementitious materials.

Effect of Overdosing

Overdose of BATIMIX HWR 1200-A will result in a significant increase in the slump together with a slight increase in air entrainment as compared to concrete prepared at normal dosage. In certain circumstances, a remarkable loss in the slump consistency may be noticed.

Compatibility

BATIMIX HWR 1200-A is compatible with all other Batimix admixtures incorporated in the same concrete. During batching, all admixtures should be dispensed and added separately to the concrete mix. It is always recommended to assess the performance of added admixtures on the fresh and hardened concrete properties using trial tests.

BATIMIX HWR 1200-A is compatible with all types of Portland cement and replacement materials such as silica fume, fly ash, and blast furnace slag.

Dispensing

Accurate and reliable automatic dispensing systems should be used to introduce the correct quantity of BATIMIX HWR 1200-A in the concrete mixer; the dosage should be reproducible with very little variation. This product should not be directly added on the dry cementitious particles; it should rather be introduced after incorporating around 2/3 of the mixing water to enhance its effectiveness and dispersing properties.

Storage

BATIMIX HWR 1200-A has a minimum shelf life of 12 months if kept unopened and stored at temperatures ranging from 2 to 50 ºC.

Packages

• Bulk
• 1 t IBC
• 200 kg metallic drum
• 20 kg metallic Pail
• 4 kg metallic pail