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Gidrobeton-Torkret — mix for dry-mix shotcreting of concrete
Kalmatron

Gidrobeton-Torkret — mix for dry-mix shotcreting of concrete

Sprayed concrete mixes

The ready-to-use dry mix Gidrobeton-Torkret with aggregate no larger than 2.5 mm is applied with dry-mix shotcreting equipment in layers, in horizontal strips. It is used to repair deteriorated concrete, reinforced concrete, brick and stone structures, increase their load-bearing capacity, restore the protective cover in mine shafts, tunnels and vaulted structures, and stabilise slopes. With dry-mix shotcreting the compressive strength at 28 days reaches 80 MPa, watertightness is at least W20, and in carbonation resistance the material corresponds to concrete of especially low permeability.

Specifications

ManufacturerKalmatron — OOO “Kalmatron-SPb”, Saint Petersburg
Typeshotcrete mortars
Useindustrial buildings, tunnels and metro, tanks and treatment plants
Baseready-to-use cement-based dry repair mix for dry-mix shotcreting (cement-based waterproofing repair compound); aggregate fraction no more than 2.5 mm
Colourgrey (free-flowing grey powder)
Packaging25 kg paper bags
Application methodrepair of deteriorated concrete, reinforced concrete, brick and stone structures, increasing load-bearing capacity, restoring the protective cover, mine shafts, tunnels and vaulted structures, stabilisation of slopes and soils, thin-walled structures; clean the substrate of dust, dirt, loose concrete and oils; remove rust and concrete from the rebar at least 50 mm beyond the visible traces, with deep damage — additional reinforcing meshes; coat exposed rebar with “Kalmatron-Adgeziv”; moisten the concrete generously to saturation without puddles; shotcreting in layers in horizontal strips of 1–1.5 m, vertical surfaces from bottom to top, nozzle perpendicular to the surface; over mesh — mesh cover of 12–15 mm; trowelling is not recommended (if necessary — an additional layer for trowelling before setting begins); equipment for dry-mix shotcreting (AS-1, Aliva 246, etc.)
Application temperaturenot below +5 °C
Curingduring setting and hardening protect from freezing, direct sun and drying out; wet periodically during the first few days
Key propertiescompressive strength after 7 days at least 40 MPa, after 28 days at least 60 MPa; compressive strength with dry-mix shotcreting after 28 days 80 MPa; flexural strength at 28 days at least 8.0 MPa; bond strength to substrate at least 2.0 MPa; watertightness at least W20; frost resistance at least F1 400; non-shrink; aggregate fraction no more than 2.5 mm; effective carbon dioxide diffusion coefficient 2.1·10⁻⁷ cm²/s versus 3.3·10⁻⁷ cm²/s for BM concrete (0.45) — corresponds to concrete of especially low permeability (GOST 31383 clause 6, test report No. 187-2 of 28.06.2021, testing centre “Stroitelnye Materialy”); service temperature -60…+130 °C

Data from the manufacturer’s technical data sheet. The coating system, number of coats and quantity are selected for your project on request.

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