CASE STUDY
Leaking Water Storage Tank Rehabilitation, Dominican Republic
A leaking reinforced concrete tank holding about 2.5 million gal (10,000 m³) was lined from the inside with an NSF/ANSI 61 certified glass FRP system from QuakeWrap®, instead of having its cracks sealed with grout.
Project Details
- OWNER
- Corporación del Acueducto y Alcantarillado de Santiago (CORAASAN)
- LOCATION
- Santo Domingo, Dominican Republic
- STRUCTURE
- Reinforced concrete water storage tank, about 2.5 million gal (10,000 m³), 32 m across with a 13.1 m wall
- QUAKEWRAP® SYSTEM
- Wet layup glass FRP liner, NSF/ANSI 61 certified (QuakeWrap® B2408G biaxial dual-layer glass fabric, with U20G glass added in the lower wall)
- FRP SYSTEM, MATERIALS AND SITE SUPERVISION
- QuakeWrap, Inc.
- PROJECT MANAGEMENT AND INSTALLATION
- Core Dominicana, Santo Domingo
- CASE STUDY PUBLISHED
- December 2022
PROJECT VIDEO
Repair of a Leaking Concrete Water Storage Tank
Plays from YouTube
01 · THE CHALLENGE
A Critical Tank With Cracks and Leaks
One of CORAASAN's reinforced concrete water storage tanks had multiple cracks and leaks and needed structural rehabilitation.
The first plan was to seal the leaks with grout. After consulting with QuakeWrap, CORAASAN concluded that a structural FRP lining was the better choice for longevity and for reducing risk on a critical structure. Patching cracks with grout is not a long-term fix and does nothing for the tank's overall structural integrity.
02 · THE SOLUTION
A Glass FRP Liner Built Up in Zones
QuakeWrap® recommended the lining system, provided specifications and design support, and supplied the materials. QuakeWrap's biaxial, dual-layer B2408G glass fabric, chosen for improved water tightness, was the main material. Core Dominicana installed the liner by wet layup, with QuakeWrap supervising on site.
The QuakeWrap detail sheet in the case study sets out the lining:
- Voids filled, protrusions ground and cracks injected with epoxy before lining
- QuakeBond™ 300SR resin to prime the concrete and saturate the fabric, with QuakeBond™ 220TC as the epoxy adhesive
- Wall base to 3.18 m: one layer of B2408G plus two layers of U20G
- 3.18 m to 5.72 m: two layers of B2408G plus one layer of U20G
- 5.72 m to the roof: one layer of B2408G
- 1,270 mm wide fabric in the hoop direction with 200 mm overlaps and staggered seams
- Ends tapered with thickened QuakeBond™ 220TC, then a 0.5 mm 300SR top coat
03 · THE RESULT
Service Life Reset for at Least 50 More Years
The international project team finished on schedule and within budget, with no significant issues. The case study credits close collaboration, coordination and crew training.
CORAASAN saved an estimated $2 million or more compared with replacing the tank. The lining stops the leaks, strengthens the tank walls and, per the case study, resets the tank's service life for a minimum of another 50 years.
- estimated savings
- $2M+
- service life reset
- 50+ yrs
Products & Applications Used
-
Wet & Dry Layup FRP
Carbon and glass fabric systems for beams, columns, slabs, walls and pipes.
Explore Wet & Dry Layup FRP -
Tank Repair
Water, mining and process tanks lined or strengthened with QuakeWrap® FRP.
Explore Tank Repair -
PipeMedic®
FRP lining and strengthening for pipes, plus storage tanks, manholes and vaults.
Explore PipeMedic®
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