The dry reinforced mix SBR-wall is intended for making curtain walls in order to insulate unused mine workings and mined-out spaces in coal mines. Dry reinforced mix SBR-wall is used for the construction of ventilation, water and pulp-proof, explosion-proof and dynamically stable isolating curtain walls. The dry reinforced mix SBR-wall allows construction both cut and no-cut curtain walls. The dry reinforced mix SBR-wall can be used for making jackets adjacent to the curtain wall, non-combustible lining, grouting of weakened mine workings , as well as isolating coal beds from contact with the mine atmosphere, prevention of leaks and air leakage through cracks in coal pillars.
Compressive strength (in 3 days) — at least 25 MPa
Bending strength after storage for 28 days — at least 10 MPa
Bending strength after storage for 3 days — at least 7.5 MPa
Adhesion with coal and rock at the age of 28 days — at least 1.5 MPa
- High compressive and bending strength
- Durable
- Enables quick construction of a curtain wall
Dry reinforced mix for the construction of isolating, including explosion-proof, curtain walls SBR-wall is a polymer-mineral fine-grain mix obtained through intensive mixing of graded sand, high-grade Portland cement and a set of modifying additives, ensuring durability, high rate of gaining early strength and waterproofing.
Preparation of 1 cubic meter of solution requires 1700-1800 kg of dry mix. The mix rebound is less than 5%. Before applying the mortar, make the rear wall as formwork (plywood, fiberboard, chipboard). After that, the mortar is applied using the shotcreting equipment for dry or wet shotcreting.
When using equipment for dry shotcreting, type A dry reinforced mix SBR-wall is applied, for wet shotcreting - type B dry reinforced mix SBR-wall, the mortar is applied continuously until full completion. Working surface, ambient air and gauged water temperature must be at least +5ºC and no more than 30ºC.
Works of preparation and application of shotcrete mixes must be performed in accordance with the requirements of the document titled Instruction for the construction and repair of isolating and explosion-proof curtain walls using the “Dry reinforced mix SBR-wall”. The rebound accumulated on the soil of the mine working is periodically mixed with a jet of shotcrete or eliminated.
Dry mix consumption depends on the type of work performed. Preparation of 1 cubic meter of solution requires 1700-1800 kg of dry mix. The mix rebound is less than 5%.
Comes in bags with polyethylene liner weighing 25 kg (±0.5 kg), put into big bags with polyethylene liner, 1000 kg each.
Store the construction mix in a dry place with relative humidity of 60%, temperature from –50 to +50ºC. Shelf life in the manufacturer’s packaging is 6 months from the date of manufacture.
