FRP Lamination for Concrete Wastewater Tanks

FRP Lamination for Concrete Wastewater Tanks

FRP lamination lines concrete aeration tanks, sewage treatment (STP) tanks and wastewater holding tanks with ISO or vinyl ester resin and glass mat, so wastewater cannot attack or leak through the concrete. Laid on site.

SKU :

LAM-WWT

FRP Lamination for Concrete Wastewater Tanks

FRP lining for concrete wastewater tanks is a seamless fiberglass layer of resin and glass mat laid by hand inside the tank, so sewage and effluent cannot attack or leak through the concrete. Mui Fatt lines aeration tanks, sewage treatment (STP) tanks and wastewater holding tanks on site with isophthalic polyester (ISO) or vinyl ester (VE) resin. We also line rainwater harvesting tanks and other concrete tanks.

Ringkasan: Lapisan fiberglass (FRP) untuk tangki konkrit air sisa: tangki pengudaraan, tangki loji rawatan kumbahan (STP) dan tangki simpanan air sisa, dengan resin ISO atau vinyl ester. Konkrit baru perlu matang kira-kira 28 hari, dan kebocoran air bawah tanah mesti dihentikan dahulu.

Concrete tanks we line

Concrete tank	Why line it	Usual resin
Aeration tanks	Stops wastewater attacking and leaking through the concrete	ISO or VE
Sewage treatment (STP) concrete tanks	Stops sewage attacking and leaking through the concrete	ISO or VE
Wastewater holding tanks	Stops wastewater attacking and leaking through the concrete	ISO or VE
Rainwater harvesting concrete tanks	Waterproofing	GP; food-grade resin can be provided when a concrete water tank needs a lamination as a backup layer
Other concrete tanks	Waterproofing or chemical protection, to suit what the tank holds	GP for water; ISO or VE for chemicals

Specifications

Lining build-up	1 coat of resin primer; plies of 450 g/m² E-glass chopped strand mat (CSM); 1 ply of surface veil; 1 coat of waxed resin topcoat
Number of plies	Minimum 1 ply recommended; usually up to 3 plies. Chemical tank linings use 2 to 5 plies to suit the chemical.
Lining thickness	About 1 mm per ply, so usually about 1 mm to 3 mm
Resin	Isophthalic polyester (ISO) or vinyl ester (VE) for wastewater, sewage and chemicals; general purpose polyester (GP) for rainwater
Typical properties	Tensile strength 9,000 psi; tensile modulus 1,000,000 psi; Barcol hardness above 30; adhesion above 290 psi on sweep-blasted concrete
Curing	Primer tacky in about 1 to 2 hours; each laminate stage touch dry in about 3 to 4 hours; topcoat left about 12 hours
Back in service	We recommend waiting 48 hours after the topcoat before filling
Inspection	Visual inspection for blisters, cracks, trapped air and irregularities; ply count during lamination
Work site	On site

How we line a wastewater tank

Site visit: our technical staff check the area, and access for workers, before work starts.
Surface preparation: the concrete is blasted to remove laitance and loose material, and dust is vacuumed off.
Priming: one coat of resin primer by brush or roller, left about 1 to 2 hours until tacky.
Levelling: small holes and unevenness are filled with FRP putty. Large concrete defects must be repaired by the owner first.
Lamination: each ply of glass mat is laid into wet resin, wetted through and rolled to remove trapped air, then the surface veil.
Topcoat: a resin-rich waxed topcoat, left to cure about 12 hours.
Inspection: visual inspection for blisters, cracks and trapped air, with the plies counted as they are laid.

Before we start

New concrete: cured for about 28 days before lining.
Groundwater: any groundwater leaking into the tank must be stopped first, and any patch must hold through the lining work.
Large defects: repaired by the owner before we line; we fill small defects with FRP putty.
Weather: 10°C to 50°C, relative humidity below 90%, surface at least 3 K above dew point.