How does VELOSIT CA 112 create a permanent reduction of water permeability in concrete?
VELOSIT CA 112 is a powder admixture that initiates a crystalline reaction in concrete. The reaction takes place with the free lime of the concrete and creates a permanent reduction of water permeability. The admixture creates a crystalline structure inside the concrete, reducing the amount and diameter of the capillary pores. This results in a waterproof concrete that is resistant to aggressive media with a pH range of 3-12 and against soft water with low ion content. Additionally, the treated concrete is able to self-heal static cracks up to 0.4 mm.
Can VELOSIT CA 112 effectively self-heal shrinkage cracks when in contact with water?
VELOSIT CA 112 is a powder admixture that initiates a crystalline reaction in concrete. The reaction takes place with the free lime of the concrete and creates a permanent reduction of water permeability. The admixture creates a crystalline structure inside the concrete, reducing the amount and diameter of the capillary pores. This results in a waterproof concrete that is able to self-heal static cracks up to 0.4 mm.
What is the recommended method for mixing VELOSIT CA 112 into concrete - at the batch plant or on-site into the batch truck?
There are three recommended methods for mixing VELOSIT CA 112 into concrete:
1. Batch-plant: Add VELOSIT CA 112 together with the aggregates. Use normal mixing procedure.
2. Concrete truck: Add VELOSIT CA 112 into the drum when the truck arrives at the job site. Mix for 8 min. at high speed before pumping. Trial mixes with the concrete mix design are strongly recommended for this application.
3. Site mixes: Concrete mixed in small tumbler mixers can also be improved with VELOSIT CA 112. As the mixing intensity is lower, we recommend producing a slurry of VELOSIT CA 112 with 100 – 200 % water to ensure proper mixing results.
Is VELOSIT CA 112 suitable for waterproofing concrete in basements and below grade parking structures?
Some of the recommended applications for VELOSIT CA 112 in waterproofing concrete include waterproof concrete for basements and below-grade parking structures, waterproofing of potable water structures, waterproofing of sewage structures, waterproofing of tunnels and pipelines, slab waterproofing (dry shake application), waterproofing of elevator pits, and waterproofing of shotcrete.
Can VELOSIT CA 112 be used for waterproofing potable water structures?
Some of the recommended applications for VELOSIT CA 112 in waterproofing concrete include waterproof concrete for basements and below-grade parking structures, waterproofing of potable water structures, waterproofing of sewage structures, waterproofing of tunnels and pipelines, slab waterproofing (dry shake application), waterproofing of elevator pits, and waterproofing of shotcrete.
Is VELOSIT CA 112 effective for waterproofing sewage structures, tunnels, and pipelines?
Some of the recommended applications for VELOSIT CA 112 in waterproofing concrete include waterproof concrete for basements and below-grade parking structures, waterproofing of potable water structures, waterproofing of sewage structures, waterproofing of tunnels and pipelines, slab waterproofing (dry shake application), waterproofing of elevator pits, and waterproofing of shotcrete.
Can VELOSIT CA 112 be used as a dry shake for slab waterproofing?
VELOSIT CA 112 is a crystalline and hydrophobic waterproofing admixture for concrete. It is recommended for waterproofing concrete in basements and below-grade parking structures, potable water structures, sewage structures, tunnels and pipelines, slab waterproofing (dry shake application), elevator pits, and shotcrete.
How long does VELOSIT CA 112 take to fully cure and provide its waterproofing properties?
The context does not provide information about the curing time for VELOSIT CA 112. However, it is mentioned that standard curing procedures should be followed for the site conditions. The context also states that VELOSIT CA 112 creates a crystalline structure inside the concrete, reducing the amount and diameter of the capillary pores, and it is classified as a waterproofing additive according to table 9 of EN 934-2. Therefore, it provides its waterproofing properties once it is mixed into the concrete and the crystalline reaction takes place.
Does VELOSIT CA 112 have any specific application guidelines or limitations?
Yes, VELOSIT CA 112 has specific application guidelines and limitations. It is recommended for use only by professional applicators and should be used with most CEM I-III R and N (ASTM Type I-V) cements. Cement types with more than 50% pozzolanic content are not suitable. The cement content must be at least 280 kg/m3 (472 lbs. per yd3), and total fly ash must be less than 50% of the cement content. Pozzolanic additives like Microsilica or slag should be avoided as they compete with VELOSIT CA 112 for the available lime. The dosage depends on the amount of mixing water, including aggregate moisture in the batch mix, and should be added at a rate of 1.8% VELOSIT CA 112, i.e. 1.8 kg per 100 liters (1.5 lbs. per 10 gal.). It is also important to follow standard curing procedures for the site conditions.
Are there any additional benefits or features of VELOSIT CA 112 that should be considered?
Some additional benefits and features of VELOSIT CA 112 include increased resistance against aggressive media with a pH range of 3-12 and against soX water with low ion content, potable water approval, and the ability to self-heal staFc cracks up to 0.4 mm. It is also slightly hydrophobic, easy to mix, and has little influence on concrete seVng and strength development.
Is VELOSIT CA 112 suitable for use in potable water structures
Yes, VELOSIT CA 112 is suitable for use in potable water structures. It is potable water approved according to the information provided in the context.
