Batimix Acc DG1-L

Description

BATIMIX Acc DG1-L is a shotcrete admixture designed to accelerate setting times of concrete. It does not contain calcium chloride or added chloride ions that could potentially attack steel, aluminum, and zinc embedments.

Main Purpose

BATIMIX Acc DG1-L is designed to reduce 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 Acc DG1-L include all types of shotcrete castings such as plain, reinforced, precast, ready-mixed, and pumped.

Features

Concrete prepared with BATIMIX Acc DG1-L is characterized by the following:

In the plastic state:

• Decreased overtime, allowing same-day finishing Reduced initial and final setting times
• Improved thixotropic properties, allowing thick sections to be built
• Minimum rebound and single-pass spray coatings
• Reduced bleeding and segregation

In the hardened state:

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

Properties

• Appearance: brown liquid
• Specific gravity: 1.25 ± 0.02 at 23 ºC
• Chloride content: nil
• Air entrainment: typically less than 0.5% at normal dosages
• Alkali content: typically less than 1.5% as Na₂O

Health and Safety

BATIMIX Acc DG1-L 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 Acc DG1-L complies with ASTM C 1141 requirements for Type I (dry mix shotcrete), Grade 1 (conventional accelerator), Class A (liquid).

Dosage rates

The optimum dosage of BATIMIX Acc DG1-L 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 2% to 6% 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 Acc DG1-L to maintain similar W/C.

Effect of overdosing

In general, an overdose of BATIMIX Acc DG1-L will produce a highly cohesive material with significant loss in workability and increased early strength as compared to that normally obtained. The rapid initial acceleration of the cement hydration process due to overdosing will generally lead to slightly reduced 28-day compressive strength.

Compatibility

BATIMIX Acc DG1-L 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 Acc DG1-L.

Dispensing

For “dry process” shotcrete applications, BATIMIX Acc DG1-L is directly added after the air ring in the spray nozzle. For consistent and accurate supply of the admixture during spraying, the pressure of the delivery system should be adjusted taking into consideration several factors such as type of equipment, diameter hose, and distance to application area. Make sure to agitate well the product prior to use.

Technical support

For proper products usage, Holderchem may provide, upon request, technical laboratory support and on-site assistance.

Storage

BATIMIX Acc DG1-L 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

• 1 t IBC
• 200 kg drum
• 20 kg pail
• 4 kg pail