Batimix Accelerator 320

Description

BATIMIX Accelerator 320 is a multi-purpose admixture designed to accelerate setting times of concrete. It does not contain calcium chloride or added chloride ions that could potentially attack steel, aluminum, or zinc embedments.

Main Purpose

BATIMIX Accelerator 320 reduces the initial and final setting times of concrete. It is particularly effective in cold temperatures and unfavorable weather conditions. Its use cuts construction costs and enables earlier removal of formwork systems because of the resulting increase in early strength.

Applications using BATIMIX Accelerator 320 concrete castings include plain, reinforced, precast, ready-mixed, and pumped.

Features

Concrete prepared with BATIMIX Accelerator 320 is characterized by the following:

In the plastic state:

• Reduced initial and final setting times
• Minimized bleeding and segregation
• Densified and cohesive skeleton
• Decreased overtime, allowing same-day finishing

In the hardened state:

• Reduced construction costs – no cold weather delays
• Increased early compressive and flexural strengths

Properties

• Appearance: brown liquid
• Specific gravity: 1.17 ± 0.02 at 23 ºC
• Air entrainment: typically, less than 0.5% at normal dosages
• Alkali content: typically, less than 1.5% as Na₂O

Health and Safety

BATIMIX Accelerator 320 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.

Compliance with Standards

BATIMIX Accelerator 320 complies with the following standards:

• EN 934-2: T6
• ASTM C 494 Type C

Dosage Rates

The optimum dosage of BATIMIX Accelerator 320 to meet specific requirements is best determined by trials using the actual mix composition with site materials under conditions that will be experienced in use. For cold weather concreting, follow the ACI 306 recommendations as specific procedures may be required. As a guide to the trial tests, the addition rates shall vary from 0.8% to 4% of the cementitious materials. Dosages outside the specified range may be used if necessary to meet particular mix requirements.

It is to be noted that the free water content should be reduced when designing concrete mixes with BATIMIX Accelerator 320 to maintain similar W/C.

Compatibility

BATIMIX Accelerator 320 is compatible with all other Batimix admixtures incorporated in the same concrete. During batching, all admixtures should be added separately to the concrete mix as this may alter their performances. Concrete mixtures based on Portland cement with or without replacement materials such as silica fume, fly ash, and blast furnace slag are compatible with BATIMIX Accelerator 320.

Dispensing

Automatic dispensing systems should preferably be used to introduce the correct quantity of BATIMIX Accelerator 320 in the concrete mixer.

In case of addition in the batching plant, this admixture should not be directly introduced on the dry cement. It should rather be added after incorporating around 2/3 of the mixing water, and in any case prior to introducing other chemicals such as water reducers. However, given the considerable slump loss that occurs with such additions, it may be preferable to add the BATIMIX Accelerator 320 on the job-site prior to casting.

Technical Support

Holderchem provides, upon request, technical advisory services pertaining to the concrete mix design, admixture selection, materials testing, and dispensing system.

Storage

BATIMIX Accelerator 320 has a minimum shelf life of 12 months if kept unopened and stored at temperatures ranging from 2 to 50 ºC. Make sure to agitate well the product prior to use.

Packages

• Bulk
• 200 kg drum
• 20 kg pail