SET-RETARDING AND HYDRATION CONTROL
SET-RETARDING AND HYDRATION CONTROL
A retarder is a retarder mainly composed of organic salts. Its retarding effect is achieved by the hydrogen bonding between the hydroxyl groups adsorbed on the surface of cement particles and the O2- on the surface of hydration products, as well as the hydrogen bonding with water molecules to form a stable solvation water film on the surface of cement particles, thereby inhibiting the hydration process of cement and achieving a retarding effect. Retarders are mainly used in concrete engineering that requires concrete to maintain plasticity for a longer period of time and needs to slow down the rate of hydration heat release.
| Dosage | Benchmarking products | Product description | |
| SG100 | 5kg-100kg/t | Usually added to finished water reducing agents and then used in concrete. It can improve the retarding effect of concrete, delay the initial and final setting time of concrete, and maintain a shorter initial and final setting time difference. | |
| TCD98 | 5kg-100kg/t | ||
| RETARD24 | 0.2 – 1.5 % | Sika reatarded 25 | It is a liquid concrete admixture mainly used for large volume concrete or concrete projects with longer pouring times. When added with 2%, the initial and final setting time can be extended to 72 hours or more; After the initial setting delay in the plan, the hardening speed accelerates without affecting the later development of concrete strength. |
| RETARD48 | 0.5-2.0% | It is an active intervention aimed at the adiabatic temperature rise process of large volume concrete hydration, which can significantly inhibit the cement hydration process, delay the internal heating rate of concrete, reduce the hydration temperature peak, and delay the appearance time of the temperature peak, effectively suppressing or reducing the temperature shrinkage cracks of concrete. | |
Related Products
