Alkali-Free Setting Agent Cement Accelerator for Cement

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Alkali-Free Setting Agent Cement Accelerator for Cement

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Product Description

Basic Information

Model NO.:cement accelerator

Grade:LR

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

Product Description

Alkali-free Setting Agent (Cement Accelerator) is a high-performance, environmentally friendly solution designed to accelerate cement solidification. This chlorine-free agent significantly improves both early and late-stage cement strength while enhancing anti-seepage capabilities.

Key Features:

Non-toxic, non-corrosive, and non-explosive aluminum sulfate system.
Environmentally friendly alkali-free and chlorine-free composition.
Superior early strength development (1-day compressive strength ≥7.0MPa).
Excellent anti-seepage and antifreeze properties.

Technical Specifications

Parameter Item	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 & Application

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

Application Scope:

High-performance sprayed concrete and mortar for tunnel linings (railway, highway, hydraulic).
Water-stopping and leak-proofing projects.
Reinforcement and repair of thin-walled concrete.
Protective engineering in metallurgy, coal mines, and civil defense.

Preparation Recipe (Powder to Liquid):

General Formula	50% Powder + 50% Water
Adaptive Recipe	45~60% Powder + 55~40% Water

Plant & Logistics

Packaging Options:

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

Shipping: Standard 20GP/40GP/40HQ FCL capacity is 25 tons. Delivery typically within 7-15 days.

Frequently Asked Questions

Q1: What are the primary benefits of using an alkali-free setting agent? A: It is environmentally friendly, non-corrosive to steel reinforcement, and significantly improves both early and long-term compressive strength of concrete compared to alkaline alternatives.

Q2: How should the powdered accelerator be stored? A: It should be stored in a dry, sealed environment to prevent moisture absorption. In powder form, it can be stored for up to 2 years.

Q3: Can the powder be converted into a liquid form on-site? A: Yes, it can be mixed with water (recommended 1:1 ratio) at temperatures above 10°C using a high-speed mixer (above 600 rpm) for about 0.5 to 1 hour.

Q4: Are there any safety precautions for operators? A: Operators should wear masks, goggles, and protective clothing. If the product contacts skin or eyes, rinse immediately with plenty of clean water and seek medical advice if necessary.

Q5: Does the freshness of cement affect the performance? A: Yes, cement freshness significantly impacts setting time. Newly produced cement is recommended for the best results in shotcrete applications.

Q6: Is it compatible with other types of accelerators? A: No, it is strictly forbidden to mix this product with other accelerators. Mixing may cause chemical reactions that lead to equipment blockage or failure.