· Possible to retro-fit against existing structures.
*Typical properties
MASTERFLEX® 900 re-injectable hose is a specially formulated PVC compound. The material is tough, flexible, resilient, chemically inert, is not affected by weathering, low temperatures, or constant immersion in water. It will withstand rough treatment during installation and is easy to install.
MASTERFLEX® 900 re-injectable hose is unaffected by alkalis, sewerage, most water solutions of organic chemicals, aliphatic hydrocarbons (fuel), mineral oils, acids and alcohols.
Two basic types of MASTERFLEX® 900 injection hose are available:
MASTERFLEX® 900 1 : Outside diameter: 19mm, longitudinal internal injection hole diameter: 6mm, discharge openings diameter: 3mm.
Installation within all types of concrete joints.
MASTERFLEX® 900 2 : Outside diameter: 24mm, longitudinal internal injection hole diameter: 10mm, discharge openings diameter: 5mm.
Installation within long concrete joints, or voids where large quantities of injection materials are to be injected.
Installation
Preparatory work:
All MASTERFLEX® 900 re-injectable hoses should be protected from oil, dirt, concrete spatter and damage and should be left clean to receive concrete.
The surface where the MASTERFLEX® 900 re-injectable hose will be installed has to be smooth. The surface generated by an internal vibrator while compacting the concrete will usually be suitable.
Method:
The MASTERFLEX® 900 re-injectable hose consists of the injection hose itself and the vent ends. These are specially fabricated PVC hoses to withstand injection pressure, in green and transparent colours. The vent ends allow the fixing op injection equipment at a later stage and generally project 20 cms out of the concrete surface.
After pouring the concrete, only the vent ends are visible. The different colours make the identification of the start and end of the hose after concreting. The injection hose and vent ends must be encased in at least 5cm of concrete.
The MASTERFLEX® 900 re-injectable hose is installed in lengths up to a maximum length of 12m. For upto 600 mm wall thickness the MASTERFLEX® 900 hose should be installed at the centre of the wall thickness.
The hose is clamped into position with MASTERFLEX® 900 clips spaced about 200-250mm apart. The hose must not be fastened to the reinforcement bars in the wall.
It is essential that there is a direct contact between the hose and the concrete. If aggregate or debris lie on the concrete, these must be removed, to prevent floating of the hose in the freshly poured concrete.
Guidelines
Installation, injection, reinjection, and selection of materials should be entrusted to an experienced and certified MASTERFLEX® 900 applicator.
The injecting of the hose may be carried out at any time either before switching off the dewatering as a precautionary measure or afterwards if leaks are noticed. The hose may be injected with water under pressure to test the integrity of the joint.
Injection of the MASTERFLEX® 900 hose with MASTERFLEX® 801 or RHEOCEM permits reinjection. Use of any other resins will render the hose unusable.
Injection always starts at one end adopting the following procedure:
· Fill the hose with injection material by means of an injection pump until it flows out at the other end. · Plug that end with the end cap. · Pressurise the MASTERFLEX® 900 hose.
Continue to inject until the moment that no material flows into the joint (there is no or only slight pressure drop at the gauge); resin is seen flowing out of the joint or a predetermined quantity has been injected. Sealing is achieved by moderate pressure and a longer injection time, as opposed to high pressure over a brief injection period.
· If required the same procedure may be adopted from the other end of the MASTERFLEX® 900 hose, this is to ensure even pressure distribution over the whole length. · Within the gel time, pressurise the hose again briefly.
Note: Normally one injection is enough to completely seal the joint, however this depends on the quality of the concrete and/or the water pressure.
Components of the MASTERFLEX® 900 HOSE
1. Injection diameter, 6 or 10mm, depending on the injection material. 2. Solid hose core for resisting concrete pressure. 3. The lateral openings with a diameter of 3 or 5mm, each staggered by 1cm, ensure a uniform discharge of the injection material. 4. The three neoprene strips in the longitudinal grooves act as non return valves.
Note
Field service, where provided, does not constitute supervisory responsibility. For additional information contact your local BASF representative.
BASF reserves the right to have the true cause of any difficulty determined by accepted test methods.
Quality and care
All products originating from BASF’s Dubai, UAE facility are manufactured under a management system independently certified to conform to the requirements of the quality, environmental and occupational health & safety standards ISO 9001, ISO 14001 and OHSAS 18001.
12/94 BASF_CC-UAE revised 07/2005