Batimix HWR 1500-A

Description

BATIMIX HWR 1500-A is a liquid high-range water-reducing (superplasticizer) admixture with enhanced properties for concrete. It is based on polycarboxylate-acid polymers blended with selected chemicals to accelerate setting. It does not contain calcium chloride or other potentially corrosive ingredients.

Main Purpose

BATIMIX HWR 1500-A is designed to improve concrete workability and/or allow an effective reduction in the free water content. This product is a highly powerful dispersant, which functions by electrostatic repulsion, breaking-up agglomerates in the concrete mix. It allows for specified concrete strength grades to be achieved, with significantly reduced cement content and/or increased workability. It is particularly used in cold climates to decrease concrete setting times. It allows for the speeding-up of finishing operations and removal of formworks. It is a superior deflocculating product with a highly marked capacity to disperse cement agglomerates and flocks normally found in a concrete mix.

Applications using BATIMIX HWR 1500-A include all types of concrete castings, such as plain, reinforced, precast, ready-mixed, lightweight, pumped, and shotcrete.

Features

Concrete prepared with BATIMIX HWR 1500-A is characterized by the following:

In the plastic state: • Higher flowability without adding extra water • Reduced water content, up to 40%, with minimum secondary effects • Enhanced homogeneity, cohesion, and ability to pump the concrete mix
• Accelerated setting, especially suitable for use in cold climates

In the hardened state: • Increased strengths - compressive, flexural, and bonding • Reduced shrinkage, creep, water permeability, and cracking • Enhanced durability and better surface appearance of the concrete

Properties

• Appearance: brown liquid
• Specific gravity: 1.12 ± 0.02 at 23 ºC
• Chloride content : typically less than 2.5% as Na₂O
• Air entrainment : less than 2% increase at normal dosages

Health and Safety

BATIMIX HWR 1500-A is not a hazardous material. However, it should not be swallowed or allowed to come into contact with skin and eyes. Suitable gloves and goggles should be worn. For additional information, kindly refer to the product’s Material Safety Data Sheet.

STANDARD COMPLIANCE

BATIMIX HWR 1500-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 1500-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 1500-A should be used at dosage rates varying from 0.2% to 1.5% of the cementitious materials.

EFFECT OF OVERDOSING

Overdose of BATIMIX HWR 1500-A will result in a significant increase in the slump with signs of bleeding and segregation as compared to concrete prepared at normal dosage. The effects of overdosing will lead to some increase in air entrainment.

COMPATIBILITY

BATIMIX HWR 1500-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 1500-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 1500-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.

TECHNICAL SUPPORT

Holderchem S.A.L. provides, upon request, complete technical support and on-site assistance to enable correct and effective use of its products.

Storage

BATIMIX HWR 1500-A has a minimum shelf life of 12 months if kept unopened and stored at temperatures ranging from 2 to 50 ºC.

Packages

• Bulk
• 200 kg metallic drum
• 20 kg metallic pail
• 4 kg metallic pail