KemCare Ltd - RheoActiv0208 492 3370
RheoActiv SP which is a new polycarboxylate based superplasticiser powder. It is a specialised polymer designed for use in cementitious applications. The RheoActiv SP follows advances in our production process resulting in an extremely cost-effective polycarboxylate superplasticiser powder. We offer 4 versions of this powder, the principle difference being the length of the polymer backbone which leads to different levels of slump retention.
Particular advantages include:
- Increased early strength development
- Increased ultimate strength & durability due to reduced permeability
- Shrinkage reduction
- Superior slump retention affords longer workability if required
- Improved appearance due to minimal air entrapment
- Superior flow characteristics in self-levelling floor screeds
- Excellent cost savings over conventional powder superplasticisers
- Cement economies, i.e. the same strength can be achieved with less cement
- Reduced energy needed for compacting machinery
A typical dosage range for RheoActiv SP would be between 0.05 - 0.5% by weight of dry cement and, as a rule of thumb, it is used at 1/3rd the dose of melamine powders.
KemCare is a supplier of speciality chemicals to manufacturers across a wide range of industries. We offer innovative products designed around the needs of our customers and provide strong technical assistance for seamless incoporation of new materials into formulations and applications. We are pleased to introduce our new range of powdered admixtures for use in construction... Kemcare Limited have developed a new specialist polymer product for use in cementitous applications.
For further information, call Robert at Kemcare Limited on 44 020 8492 3370.
Chemical admixtures are the ingredients in concrete other than Portland cement, water, and aggregate that are added to the mix immediately before or during mixing. Producers use admixtures primarily to reduce the cost of concrete construction; to modify the properties of hardened concrete; to ensure the quality of concrete during mixing, transporting, placing, and curing; and to overcome certain emergencies during concrete operations.
The effectiveness of an admixture depends on several factors including: type and amount of cement, water content, Concrete Admixture, Admixture, Admixture Mortar, polycarboxylate, powder admixture, rheo active, mixing time, slump, and temperatures of the concrete and air. Sometimes, effects similar to those achieved through the addition of admixtures can be achieved by altering the concrete mixture, reducing the water-cement ratio, adding additional cement, using a different type of cement, or changing the aggregate and aggregate gradation.
Admixtures are classed according to function. Although our focus is predominately on water reduction technologies KemCare can offer 5 main classes of chemical admixtures:
Superplasticising: Enables the water content of a given concrete mix to be greatly reduced without affecting the consistency, or greatly increases the workability without changing the water content, or achieves both affects.
Air-entraining: Introduces a specific quanity of small, evenly distributed air voids during the mixing process which remain in the concrete after it hardens.
Grout Admixtures: Retards the time to initial set and prolongs the consistency.
Underwater Stabilising: Prevents the 'washout' of cements and binders in water bearing ground conditions.
Waterproofing: Accelerates the initial strength with or without an effect on the setting time.
According to EN 206 -1 (a European standard), the permitted dosage of admixtures is less than or equal to 5% by weight of the cement (the effect of a higher dosage on the performance and durability of the concrete must be verified). For 'Low dosages' admixture quanitities of <0.2% of the cement are only allowed if they are dissolved in part of the mixing water. If more than one admixture is added their compatibility must be verified by specific testing. Admixture Mortar, Concrete Admixture, admixture, kemcare, polycarboxylate, powder admixture, rheo active, rheoactive.
Getting in contact with KemCare Ltd - RheoActiv
1379 High Road
Tel: 0208 492 3370
Fax: 0208 492 3371
KemCare Ltd - RheoActiv Products & Services