Concrete admixture

VF200 – Polycarboxylate Slump-Retaining Flake Concrete Admixture

Utilizes “slow-release” technology to provide continuous dispersion in alkaline environments without affecting setting time.

Appearance: White Flakes

Category Concrete admixture

VF200-Polycarboxylate Slump Retaining Flake

VF200 -Polycarboxylate Slump Retaining Flake is a new generation, eco-friendly solid admixture specifically developed by Luke Chemicals to maintain stable concrete workability and slump performance over extended periods. As part of our professional construction chemical supplies portfolio, this product is designed to meet the increasing demand for high-performance chemical admixtures for concrete used in modern infrastructure, precast, and commercial construction projects. This advanced concrete admixture chemical is widely used in ready-mix concrete plants, precast manufacturing, long-distance concrete transportation, and high-temperature construction applications where slump retention and performance consistency are critical.

Technical Principle

The core technology behind this polycarboxylate slump-retaining flake is its innovative dual-action mechanism based on “steric hindrance and time-controlled slow-release” technology. This advanced molecular design enables precise and continuous functional release during the cement hydration process. Special slow-release functional groups are grafted onto the main molecular chain of the slump-retaining agent. Unlike conventional superplasticizer molecules that ionize immediately in alkaline concrete environments, these functional groups gradually hydrolyze over time. As hydration progresses, the product continuously releases dispersing side chains that replenish consumed superplasticizer molecules. This sustained dispersion mechanism helps maintain concrete fluidity, workability stability, and slump retention for extended transportation and placement periods. This technology makes the product highly suitable for modern chemical admixtures concrete systems requiring stable rheology, controlled hydration behavior, and consistent concrete performance.

Key Characteristics & Advantages

High Solid Content and Excellent Solubility

This flake-form polycarboxylate slump-retaining agent features a solid content of 97% and is completely water-soluble, making it ideal for efficient storage, transportation, and flexible onsite preparation.

Flexible Preparation for Concrete Applications

For ready-mix concrete and precast concrete production, the product should be dissolved in water before use. It performs best when combined with polycarboxylate ether (PCE) water-reducing flakes to prepare solutions with solid contents of 10% to 20%.

Outstanding Compatibility with Concrete Admixture Systems

The product demonstrates excellent compatibility with various standard, high-range, and early-strength polycarboxylate superplasticizers in both liquid and powder forms. This allows concrete producers and contractors to achieve stable blending performance across different mix designs.

Specialized Slump Retention Function

Unlike conventional admixtures that may alter multiple concrete properties simultaneously, this product is specifically engineered to provide long-lasting slump retention without negatively affecting the primary water-reducing performance.

Stable Concrete Performance

While maintaining concrete workability over long durations, the product does not significantly influence setting time or early compressive strength development, making it highly reliable for demanding construction environments.

Improved Concrete Quality and Durability

This advanced concrete admixture chemical improves concrete homogeneity, minimizes segregation and bleeding, enhances surface appearance, and contributes to a denser microstructure for improved long-term durability and strength performance.

Product Information

Parameter	Specification
Appearance	White to light-red flake
Moisture Content (%)	< 4.0
Bulk Density (kg/m³)	400~500
Active Content (%)	> 90
pH Value (20℃, 10% solution)	7.0 ~ 9.0
Solid Content (%)	97.0 ± 1.0
Chloride Ion Content (%)	≤ 0.1
Alkali Content (%)	≤ 0.3

Applications of Polycarboxylate Slump Retaining Flake

As one of the specialized chemical admixtures for concrete in the global construction industry, this product is widely used in the following applications:

Ready-Mix Concrete Transportation

Suitable for commercial concrete batching plants supplying remote construction sites where long transportation times require extended slump retention and stable workability.

High-Temperature Concrete Construction

Ideal for summer construction projects and tropical climate applications where rapid slump loss commonly affects concrete quality and placement efficiency.

Self-Compacting and Pumped Concrete

Recommended for self-compacting concrete (SCC), ultra-long-distance pumped concrete, high-fluidity concrete, and non-vibrated high-fill concrete applications requiring superior flow retention.

Precast and Precision Concrete Components

Widely used in precast concrete production, concrete pipe piles, railway sleepers, and precision structural elements requiring consistent slump stability and uniform product quality.

Infrastructure and Large-Scale Construction Projects

Applicable in bridges, tunnels, highways, industrial flooring, commercial buildings, and large-scale infrastructure developments where durable and high-performance concrete systems are essential.

Application Information

Recommended dosage: 0.1% to 0.5% of the cementitious material weight.
The optimal dosage should be determined through laboratory mix design trials and field testing.
Trials must always be conducted before commercial application.
This product must not be mixed with naphthalene sulfonate-based admixtures.
For optimal results, it is recommended to use this product together with polycarboxylate water-reducing flakes.

Why Choose Luke Chemicals as Your Concrete Admixture Manufacturer

As a professional supplier in the China concrete admixtures market, Luke Chemicals focuses on delivering reliable construction chemical supplies for global distributors, importers, ready-mix producers, contractors, and building material wholesalers. Our concrete admixture factory combines advanced formulation technology, strict quality control systems, and international supply capabilities to support a wide range of concrete applications worldwide. We provide:

Stable product quality
OEM and bulk supply support
Technical formulation assistance
Global export experience
Competitive factory pricing
Reliable production capacity

Whether you are sourcing chemical admixtures concrete products for infrastructure projects, precast manufacturing, or ready-mix operations, our team can support your specific performance requirements.

Legal Notes

The information provided in this document is offered in good faith based on current product knowledge and application experience when properly stored, handled, and used under normal conditions. Because actual site conditions, materials, substrates, and construction methods may vary, no warranty regarding merchantability or suitability for a particular purpose can be implied from this information or related recommendations. Users are responsible for testing the product’s suitability for intended applications before full-scale use. We reserve the right to modify product properties without prior notice. All orders are subject to the current terms of sale and delivery. Customers should always refer to the latest Product Data Sheet available upon request.

FAQs

What is Polycarboxylate Slump Retaining Flake used for?

Polycarboxylate Slump Retaining Flake is used to maintain concrete workability and slump retention during long transportation and placement times.

Can this product be used in self-compacting concrete?

Yes, it is widely used in self-compacting concrete (SCC), pumped concrete, and high-fluidity concrete applications.

What is the recommended dosage?

The recommended dosage is typically 0.1% to 0.5% of the cementitious material weight, depending on the mix design.

Is the product compatible with other concrete admixtures?

Yes, it has excellent compatibility with various polycarboxylate superplasticizers in liquid and powder forms.

Does the product affect concrete setting time?

The product is designed to provide slump retention without significantly affecting setting time or early strength development.

Why choose a China concrete admixture factory for bulk supply?

China-based concrete admixture manufacturers offer scalable production, competitive pricing, export capabilities, and customized OEM solutions for global buyers.

Related Products

BY-1005 Corrosion Inhibitor

VF570 – Polycarboxylate Superplasticizer Powder

VF530 – Polycarboxylate Superplasticizer Powder

Flexible Payment & Global Delivery Solutions

Backed by large-scale production capacity and strong technical strength, Sichuan Lujia Sitong Technology Development Co., Ltd. ensures stable supply and efficient delivery to customers worldwide.

We support multiple international trade terms and flexible payment methods to meet diverse procurement needs.

Payment Options:

T/T, L/C, OA, and other negotiated methods

Shipping Coverage:

Worldwide

Transportation Terms:

Sea freight by CIF, FOB, CFR, and other Incoterms

Lead Time:

7–14 days depending on order volume and specifications

Packaging:

• 25kg moisture-proof bags • 500kg / 600kg palletized packaging • Customized packaging available

Minimum Order Quantity (MOQ):

500kg

Request Your Free Product Sample

To help you better evaluate our product quality and performance, we are pleased to offer free samples of our construction chemical solutions. Experience real results before placing bulk orders — with worldwide delivery available.

What You Will Receive:

✔ Product Technical Data Sheet (TDS) & brochure
✔ 200–600g sample (depending on product type)
✔ Fast global shipping via DHL or FedEx
✔ Technical consultation & formulation support
✔ Zero sample cost (shipping may vary by region)

Why Try Our Samples?

• Verify performance in real applications
• Test compatibility with your materials
• Reduce procurement risk
• Get expert technical guidance

Frequently Asked Questions

1. What are concrete admixtures used for?

Concrete admixtures are added to concrete mixes to improve performance such as strength, workability, waterproofing, durability, setting time, and crack resistance. They help achieve better construction quality and efficiency under different project conditions.

2. Can your admixtures be used with standard concrete materials?

Yes. Our products are compatible with most types of cement, aggregates, and conventional concrete mix designs. Technical support is available to ensure optimal performance for your specific application.

3. Do you provide technical data sheets (TDS)?

Yes. Each product is supplied with a detailed Technical Data Sheet including dosage, application guidelines, storage conditions, and safety information.

4. Can I request samples before placing a bulk order?

Absolutely. We offer free product samples for testing and evaluation. Samples are typically 200–600g depending on the product type.

5. What is the typical dosage of your admixtures?

Dosage varies depending on the product and application, usually ranging from 0.5% to 2% by cement weight. Exact recommendations are provided in the product TDS.

6. Do you offer customized formulations?

Yes. Our technical team can adjust formulations based on your project requirements, climate conditions, and performance goals.

7. What packaging options are available?

Standard packaging is 25kg bags, with palletized options (500kg–600kg) and customized packaging available upon request.

8. How long is the shelf life?

Most products have a shelf life of 12 months when stored in a dry, cool, and sealed environment.