$High Efficiency Alkali-Free Accelerator Concrete Used in Refractory Engineering$

1 / 5

$High Efficiency Alkali-Free Accelerator Concrete Used in Refractory Engineering$

High Efficiency Alkali-Free Accelerator Concrete Used in Refractory Engineering

Still deciding? Get samples of $ !

Request Sample

Send Inquiry

Product Description

Overview & Basic Info

Model NO.

Accelerator

Grade

Specific Usage

for Cement

Usage

Concrete Accelerator

State

Powdered Solid

Color

Gray Brown or off-White

pH Value

3.0±0.5

Alkali Content

<1%

Solid Content

40-50%

Setting Time

Initial: 5min / Final: 12min

HS Code

3824409000

Capacity

50000 tons

Product Description

Alkali-free solid setting agent is a new type of environmentally friendly, chlorine-free high-performance agent. It functions as a powerful accelerator for cement solidification, significantly improving early and late strength while enhancing anti-seepage capabilities.

Ingredients: Aluminum sulfate system; non-toxic, non-radioactive, and non-corrosive.
Safety: Avoid skin/eye contact. Wear masks and goggles during handling.
Storage: Store powder in intact bags to prevent moisture. Liquid storage temperature should be >5ºC. Use plastic or glass fiber reinforced plastic barrels.
Shelf Life: 2 years for powder (sealed); 3 months for liquid preparation.

Product Features

Easy to prepare: Simply add water and stir at room temperature.
Quick dissolution: Completes within 1 hour at room temperature (~600 rpm).
Highly economical: Reduces packaging and transportation costs compared to liquids.
Strength performance: Excellent 1-day and 28-day compressive strength.
Antifreeze effect: Ready-to-use powder avoids the antifreeze limitations of liquid agents.

Product Specifications

Parameter	Standard Value
State	Powdered solid
Color	Gray brown or off-white
PH value	3.0±0.5
Alkali content	<1%
Chloride ion content	<0.05%
Solid content	40-50%
Initial setting time (pure slurry)	≤5min
Final setting time	≤12min
1d compressive strength	≥7.0Mpa
25d compressive strength ratio	≥85%

Usage & Compounding

Recommended Dosage: 6-9% of cement dosage. The specific amount depends on cement type, temperature, and water-cement ratio.

Recipe / Materials	Instant Powder	Water
General formula	50%	50%
Adaptable recipe	45~60%	55~40%

Compounding Note: Use a plastic reactor with a stirring blade (>600 rpm). Water temperature should be above 10ºC. Dissolve for 0.5-1 hour. Ensure the accelerator pump is cleaned before use and do not mix with other types of accelerators to avoid blockage.

Applications

Suitable for high-performance sprayed concrete and mortar, and quick-setting leak-proofing projects:

Initial lining of tunnels (railways, highways, hydraulic diversion).
Reinforcement of thin-walled concrete and foundation pit protection.
Fire-resistant engineering and metallurgy projects.
Coal mine shafts and civil air defense projects.
High water permeability engineering environments.

Plant & Equipment

Packaging & Shipping

Standard Options:

Jumbo bags: 500kg / 600kg
Small bags: 20kg / 25kg PP or Kraft paper bags
Customized packaging available upon request

Shipping Capacity (FCL): 20GP/40GP/40HQ all support approximately 25 TONS (without pallets). Delivery typically within 7-15 days.

Frequently Asked Questions

What is the primary benefit of using an alkali-free accelerator?

It provides a strong acceleration of cement solidification while significantly increasing both early and late-stage strength compared to alkaline alternatives, while being more environmentally friendly.

How much powder should I use for my concrete mix?

The recommended dosage is between 6% and 9% of the weight of the cement. We recommend conducting on-site experiments to determine the exact ratio based on your specific cement type and temperature.

Can this powder be used directly or must it be dissolved?

It can be prepared into a liquid setting agent by mixing with water (typically 1:1 ratio) at the construction site, which saves on transportation costs and avoids antifreeze issues during storage.

What type of storage containers should be used for the liquid version?

Since the product is weakly acidic, it should be stored in plastic or glass fiber reinforced plastic barrels. Avoid using iron or steel barrels as they will react chemically with the product.

Does the freshness of the cement affect the performance?

Yes, the freshness of cement has a significant influence. Newly produced cement is ideal for spraying concrete. Cement that is damp or has been stored for a long duration may result in a poor setting effect.

Is it safe to mix this with other brands of accelerators?

No. It is strictly forbidden to mix this product with other accelerators. This can cause chemical reactions that may lead to the blockage of the accelerator pump.