BASF’s latest technology in cement additives presented the Azelis labs with the ability to selectively retard fast setting cement. Hycon R 6450 is specially developed for mortars using calcium aluminate cement (CAC). Unlike conventional retarders, Hycon R 6450 selectively controls the early setting behavior of the CAC cement, allowing for a comfortable amount of initial working time without sacrificing early strength properties.

HyCon® R 6450 F  is a setting retarder for ternary based binder systems containing ordinary Portland cement, calcium aluminate cement, and a sulfate source. This product influences with improved selectivity the aluminate reaction of the inorganic binder resulting in an enhancement of tensile adhesion strength, workability, open time, ageing, and temperature stability of the corresponding dry-mortar product.

Info & TDS

Performance Results

High performance tile adhesive formulated with Hycon R 6450 has a nice delay in reactivity early on and then immediately “wakes up” to reach its full exothermic heat output. Conventional retarders do not suppress the entire initial reactivity of the CAC cement or they reduce the overall reactivity of the cement, which negatively impacts strength.

During the retardation period created by the use of HyCon R 6450,  the mortar is workable and does not harden early. This allows for a more comfortable open time compared to conventional retarders.

In a tile formulation, a simple swap of the retarder showed significantly higher reactivity when Hycon R 6450 was used. Additional working time can be added with the use of other materials from our portfolio to further improve this formulation

Shear Bond Strength

This resulted in significantly more strength in the tile adhesive that used Hycon R 6450, especially in early strength.

BASF Lithium Carbonate Reduction Testing

Lithium carbonate is very costly due to supply constraints with much of the material reserved for battery manufacturing. It is a real struggle for the construction market to compete at the pricing demanded for the lithium carbonate. It has been shown in BASF testing that the lithium could be reduced as much as 75% of a standard dosage.

Method

Azelis Construction Solutions Lab was tasked to improve upon an existing stone tile adhesive to compete with a competitive mortar currently in the market. The lab needed to match the competitive mortar’s performance in open time, set time, workability, and strength, as well as excellent sag resistant for the heavy and large stone tiles provided.

Formulation

The cement tile adhesive utilized both ordinary Portland cement and calcium aluminate cement to achieve high strength performance. Hycon R 6450 allows for maximum binder efficiency and extended open time. Several other Azelis additives are included in these formulations.

A starting point formulation for the Azelis large format tile adhesive is available from your Azelis representative, or can be requested through Chat.

Conclusions

The Azelis lab has formulated with Hycon R 6450 to maximize early strength and ensure delayed early setting in high performance tile adhesive.

By allowing the cement in tile mortar formulations to get the most “bang for its buck,” Hycon R 6450 has the potential to reduce binder levels because there no longer a fight to overcome the reactivity reducing effects of conventional retarders. This results in a more sustainable formulation.

There have been several successful incorporations of selective retarders to predictably retard a binder package without sacrificing its strength properties.  Azelis is proud to be a part of the newest generation in cement retarders.

Ready to share in our success? Launch your next project with help from the Azelis Americas Chemists! Get innovative solutions to your everyday challenges while maintaining high quality end results.

Contact an Expert

DISCLAIMER - The information contained herein is given in good faith, based on our current knowledge and without any representation and warranty, express or implied, on its quality, accuracy, and completeness. Although it is Azelis’ practice to assist our customers with technical advice and to identify and recommend appropriate solutions for any particular application issue, such assistance, advice, and recommendation is provided without guarantee and warranty, express or implied, in relation to the suitability for use, merchantability or performance of a product, formulation or its individual ingredients for any particular application, and Azelis cannot accept any liability for any possible damages, losses or claims in this respect. Considering that Azelis can neither anticipate nor control the different conditions or circumstances under which the product is being used or commercialized, each user should conduct the necessary research and testing to ensure that a product, formulation, or its individual ingredients are fit for purpose and their intended application and verify whether their use or application does not infringe any third party (intellectual property) rights. Users are responsible for ensuring compliance with applicable laws and regulations when handling any product, formulation, or individual ingredient and are expected to familiarize themselves with the Safety Data Sheet for safety, health, and environmental information, including any instructions related to wearing protective equipment. Where required, users should obtain the necessary certifications, permits, and authorizations prior to using or commercializing any product, formulation, or individual ingredient. Please make certain that you are at all times in possession of the latest version of the written technical specification for each product, formulation, or individual ingredient, which can be requested in writing by mailing to your local representative].