KH-207 PCE-Based Slump Retention Concrete Liquid Admixture

Long-Lasting Slump Retention

KH-207 is specifically developed for concrete applications that require superior slump retention over extended periods. Its retarding effect helps slow the loss of fresh concrete fluidity, providing a longer operable window for transportation, waiting time, pumping, and placement.

High Plasticity Retention

By maintaining plasticity for longer durations, KH-207 reduces the risk of rapid slump loss and improves construction flexibility. This is especially valuable for projects where batching plants are far from the jobsite or where placement schedules may be affected by traffic, temperature, or complex site coordination.

Reliable Dispersion and Water Reduction

KH-207 provides excellent dispersion performance in silicate cement concrete systems. With a tested water reduction rate of 29% and slurry fluidity of 240 mm, it helps maintain workable consistency while supporting the strength and compactness requirements of high-performance concrete.

Good Compatibility with Cement Systems

KH-207 has strong compatibility with different types of silicate cement. It can help delay or inhibit cement hydration within the intended working window, supporting more predictable slump retention and improved mixture stability under long-duration construction conditions.

Durability Support

By enhancing the compactness of hardened slurry, KH-207 helps improve shrinkage and creep performance, reduce cracking risk, and support long-term durability. Test data shows compressive strength ratios of 147% at 7 days and 140% at 28 days, indicating reliable hardened concrete performance.

Environmentally Friendly Formulation

KH-207 does not contain harmful substances and is designed for safe, environmentally responsible use in modern concrete admixture systems.

Long-Distance Ready-Mix Concrete Transportation

KH-207 is suitable for ready-mix concrete that must maintain working performance during long transportation. Its slump retention effect helps reduce fluidity loss between batching and placement, improving jobsite consistency and reducing the need for last-minute mixture adjustment.

Concrete with Extended Waiting Time

For projects where concrete may experience waiting time before discharge, KH-207 helps preserve fresh-state workability and supports flexible scheduling. This makes it suitable for congested urban construction, large pours, and sites with limited placement access.

Pumped Concrete Applications

Stable flowability is essential for pumped concrete. KH-207 helps maintain dispersion and fluidity, reducing the risk of workability loss during pumping preparation and placement. Its tested slurry fluidity of 240 mm supports reliable concrete flow under suitable mix design conditions.

High-Performance Concrete Systems

KH-207 can be used in concrete systems that require both slump retention and hardened performance. The product supports compactness and durability, with test results showing compressive strength ratios of 147% at 7 days and 140% at 28 days.

Silicate Cement Concrete

KH-207 is suitable for various silicate series cement concrete systems. It is especially useful when the concrete mixture needs to maintain workability over a longer construction period.

What is KH-207 mainly used for?

KH-207 is mainly used for concrete applications that require long slump retention. It helps maintain concrete working performance during long transportation, site waiting, pumping, or delayed placement.

How does KH-207 improve slump retention?

KH-207 combines polycarboxylate dispersion with a retarding effect that can delay or inhibit cement hydration within the required working period. This helps reduce time-related loss of concrete fluidity and extends the operable construction window.

Can KH-207 be used directly in concrete?

Yes. KH-207 can be measured and added directly together with mixing water. It can also be diluted to a lower solid content and then added to concrete according to the required dosage.

What is the recommended dosage of KH-207?

The recommended dosage is 0.4%–1.0% of the cementitious material. The exact dosage should be determined through trial mixing based on concrete design requirements, raw material conditions, transportation distance, temperature, and required slump retention time.

Should KH-207 be used with KH-204?

KH-207 is recommended for use together with KH-204 polycarboxylic acid superplasticizer when the mix design requires both water reduction and extended slump retention. The final admixture combination should be confirmed through laboratory and site trial mixes.

Is KH-207 compatible with all cement types?

KH-207 has good compatibility with various silicate cement systems, but cement mineral composition, supplementary materials, temperature, and mix design can affect performance. Trial mixing is recommended before full-scale use.

Does KH-207 affect concrete durability?

KH-207 helps enhance the compactness of hardened slurry, improve shrinkage and creep performance, reduce cracking risk, and improve durability when used in a suitable concrete system.

KH-207 is supplied as a liquid admixture. The standard package is 1.1MT/IBC tank. Flexitank packaging is also available for bulk shipment, with typical loading of 22-25MT/20ft.

The product validity period is 6 months under proper storage conditions. Store KH-207 in a dry, ventilated place and keep it away from direct sunlight. Prevent contamination, freezing, excessive heat, and long-term exposure after opening. If the product has exceeded the validity period, testing and verification should be carried out before use.

KH-207 can be measured and added directly to concrete together with the mixing water. It can also be diluted to a lower solid content and then added to concrete in the corresponding amount.

The recommended dosage of KH-207 is 0.4%–1.0% of the cementitious material. The exact dosage should be determined after trial mixing according to concrete design requirements, raw material conditions, required slump retention time, construction temperature, transportation distance, and placement method.

KH-207 should be used with KH-204 polycarboxylic acid superplasticizer when the concrete system requires both high water reduction and long slump retention. Laboratory compatibility testing and site verification are recommended before large-scale application.

For More Information About Dosage：

• How Much Superplasticizer Should Be Added to Concrete? – A comprehensive guide covering dosage recommendations for different types of superplasticizers, influencing factors, and adjustment methods under various construction conditions.
• How to Add Superplasticizer to Concrete Correctly? – Learn the proper addition sequence, mixing procedures, and practical tips to maximize workability, strength development, and overall concrete performance.

For projects with a 1-2 hours slump retention target, dosage should be confirmed through trial mixing because cement type, supplementary cementitious materials, aggregate condition, temperature, and transportation time can all affect retention performance.