Concrete Waterproofing
by Crystallization™
Menu
region
About
Our Company
Crystalline Technology
NO EQUAL
Quality Assurance
Sustainability
Events
Products
Xypex Crystalline Technology
Concrete Waterproofing Testing
The Xypex Advantage
Coating Products
Concentrate
Modified
Additive Products
Admix C-Series
Bio-San C500
Dryshake Products
Concentrate DS Series
Repair & Accessories
Patch'n Plug
Megamix Series
FCM 80
Restora-Top Series
Gamma Cure
Xycrylic Admix
Quickset
Installations
Coating
General Information
Preparation
Mixing
Application
Finishing
Tools & Equipment List
Additive
Dryshake
Repairs
Cracks & Faulty Construction Joints
Estimating Table
Technical
Specifications
Coating
Part 1 General
Part 2 Products
Additive
Part 1 General
Part 2 Products
Part 3 Execution
Bio-San C500 Additive
Part 1 General
Part 2 Products
Part 3 Execution
Dryshake
Part 1 General
Part 2 Products
Schematic Drawings
Additive
Coatings
BIM Objects
Tech Notes
Whitepapers
Method Statements
Product Data
Safety Data
Xypex FAQ
General
Coating
Additive
Dryshake
Projects
Project Search
Wastewater Collection & Treatment
Why Xypex
Meeting the Challenge
The Structures - The Problems
The Permanent Solution
The Right Products
Project Examples
Water Treatment Plants
Why Xypex
Meeting the Challenge
The Structures - The Problems
The Permanent Solution
The Right Products
Project Examples
Water Holding Structures
General Construction-Foundations
Why Xypex
Meeting the Challenge
The Structures - The Problems
The Permanent Solution
The Right Products
Project Examples
Tunnels
Why Xypex
Meeting the Challenge
The Structures - The Problems
The Permanent Solution
The Right Products
Project Examples
Bridges
Why Xypex
Meeting the Challenge
The Structures - The Problems
The Permanent Solution
The Right Products
Project Examples
Power & Utilities
Why Xypex
Meeting the Challenge
The Structures - The Problems
The Permanent Solution
The Right Products
Project Examples
Dams & Irrigation
Why Xypex
Meeting the Challenge
The Structures - The Problems
The Permanent Solution
The Right Products
Project Examples
Marine Structures
Why Xypex
Meeting the Challenge
The Structures - The Problems
The Permanent Solution
The Right Products
Project Examples
Precast Structures
Industrial Structures
Why Xypex
Meeting the Challenge
The Structures - The Problems
The Permanent Solution
The Right Products
Project Examples
Library
News
Xypex News
Register e-News
Literature
Corporate
Project Type
Product
Articles
Videos
Featured Videos
Company & Tech
Products
Projects
Roughcuts
Continuing Education
Online Courses
Lunch Box Seminars
XypexUsers
Architects
Engineers
Contractors
Concrete Producers
Contact
Head Office
Distributors
Select a country
Distributor Login
Search
Home
/
Projects
/
Project Search
/
Detail
Search by Country
select
All
Argentina
Australia
Austria
Bangladesh
Barbados
Belgium
Bermuda
Bosnia & Herzegovina
Brazil
Bulgaria
Cambodia
Canada
Chile
China
Colombia
Costa Rica
Croatia
Cyprus
Cyprus-Greek
Cyprus-Turkish
Czech Republic
Denmark
Dominican Republic
Ecuador
Egypt
Estonia
Ethiopia & Djibouti
Finland
France
Georgia
Germany
Ghana
Greece
Guam
Guatemala
Honduras
Hong Kong
Hong Kong-Chinese
Hong Kong-English
Hungary
Iceland
India
Indonesia
Indonesia-English
Indonesia-Indonesian
Ireland
Israel
Italy
Japan
Kenya
Korea
Kosovo
Kuwait
Latvia
Lithuania
Macau
Macedonia
Malaysia
Malaysia-English
Malaysia-Malay
Maldives
Mexico
Monaco
Mongolia
Montenegro
Morocco
Nepal
Netherlands
New Zealand
Nicaragua
Nigeria
Norway
Pakistan
Panama
Papua New Guinea
Peru
Philippines
Philippines-English
Philippines-Tagalog
Poland
Portugal
Puerto Rico
Qatar
Romania
Russia
Saudi Arabia
Senegal
Serbia
Sierra Leone
Singapore
Slovakia
Slovenia
South Africa
Spain
Sri Lanka
Sudan
Switzerland
Taiwan
Tanzania
Thailand
Thailand-English
Thailand-Thai
Tunisia
Turkey
Uganda
Ukraine
United Arab Emirates
United Kingdom
USA
Venezuela
Vietnam
Vietnam-English
Vietnam-Vietnamese
by Market Segment
select
General Construction Foundation
Bridges
Dam & Irrigation
Marine Structures
Miscellaneous
Power & Utilities
Precast Structures
Tunnels
Wastewater Collection & Treatment
Water Holding Structures
Water Treatment Plants
Industrial Structures
Agriculture
by Keyword
Project Detail
Wastewater Collection & Treatment
Largo Wastewater Treatment Plant
Florida, USA
» Download
Largo, Florida, is a seaside city nestled on the Pinellas Peninsula along the Gulf of Mexico and across the bay from Tampa (fig 2). The city has a rich history rooted in citrus farming and cattle ranching. With 84,000 residents, population growth has transformed Largo into a bedroom community and a tourist destination thanks to its historic structures, white sand beaches, golf courses and ample shopping (fig 3).
Pinellas County—home to Largo, Clearwater and St. Petersburg—is the most densely populated county in the state. For more than a decade, Largo has been working to improve its only wastewater treatment plant (WWTP) in order to reduce sanitary sewer overflows, accommodate population growth, replace deteriorated structures, and provide cleaner effluent discharge.
Challenges
The 50-year-old plant, located on the eastern edge of the city, discharges treated effluent into Feather Sound on Old Tampa Bay. Since 2012, the plant has been under orders from the Florida Department of Environmental Protection (FDEP) to reduce the levels of nitrogen and phosphorous in its discharge.
Too much of these naturally occurring nutrients can cause algal blooms that block sunlight thereby killing plants and reducing the water’s oxygen content, ultimately killing fish and other aquatic organisms. Known as eutrophication, this process can damage drinking water resources, decimate recreation and aesthetic value, and cause taste and odor problems.
One of the other major goals of the city’s $60 million investment in its 18 million gallon per day (mgd) WWTP was to rehabilitate and harden many of its critical structures to improve and extend the life of the plant for many more decades (fig 4). As with most WWTPs, most of the important structures were built with cast-in-place concrete.
Of particular focus for the Largo WWTP renovation project were the three main treatment “trains” that comprise the biological nutrient removal (BNR) system. Based on the modified Bardenpho process, each train consists of five 25 ft x 100 ft concrete channels that serve as bioreactors to remove wastewater impurities and reduce nitrogen and phosphorous.
Search for Solution
Each five-chamber BNR train is coupled with two large circular secondary clarifiers (fig 5) that are positioned down the center of the plant, directly adjacent to the BNR trains. The concrete BNR trains were in need of the highest level of restoration, having been exposed to physical and chemical attack throughout 50 years of service.
The concrete structures found in most wastewater treatment plants are subject to some of the harshest environments imaginable, including abrasion erosion, chemical attack, chloride ion-induced corrosion, freeze-thaw conditions, and microbiologically induced corrosion (MIC).
Damage to the BNR trains and associated clarifiers (fig 6) ranged from concrete tanks with large cracks and exposed aggregate to structures with less severe deterioration and only minor cracking. Many solutions were suggested, but the decision came down to two candidates:
• Xypex
Megamix II with Bio-San
, a one-step repair mortar that provides both crystalline waterproofing technology and a mineral-based antimicrobial that kills acid-generating bacteria; and
• A multi-product system that would have required multiple steps to restore the damaged concrete and provide a waterproof coating.
Protection and Repair in One Step
“For the Largo WWTP, we recommended the use of Xypex Megamix II with Bio-San, which was specifically developed for this type of application,” notes David Mahler, P.E., senior vice president of CPH Engineers, a multi-disciplinary architecture and engineering firm based in Orlando, Florida. “It makes sense to use one repair product versus having to apply three or four to achieve the same goal.”
Xypex Megamix II with Bio-San is a resurfacing mortar that combines Xypex crystalline waterproofing technology with a mineral-based antimicrobial that kills the Thiobacillus group of bacteria species responsible for microbial induced corrosion (MIC). Xypex also offers Bio-San in an admixture—Xypex
Bio-San C500
—that provides the same protection for precast and cast-in-place concrete structures.
“Bio-San antimicrobial components are fixed in a mineral matrix that becomes an integral part of the concrete, whether applied as a repair mortar or as an admixture,” explains Christy Krone, a Florida representative for Xypex Chemical Corp. “The antimicrobial ingredients work indefinitely to destroy harmful bacteria at a cellular level. It cannot be washed off or wear out.”
Exceletech Coatings and Applications of Clermont, Florida, was selected to repair the Largo WWTP BNR infrastructure. The firm prepared the concrete tanks by pressure washing the damaged walls to remove loose concrete and other debris.
Large cracks were power-chiseled to create a space to accept a dry-pack of Megamix II with Bio-San, which was then covered with a top coat of Megamix II with Bio-San. The Xypex repair mortar can be applied via sprayer or trowel at a thickness of 3/8 to 2 inches. It must be applied to a surface in saturated surface dry (SSD) condition (fig 7).
For BNR tanks and secondary clarifiers with only minor cracking or other superficial damage, Exceletech applied Xypex Concentrate, a crystalline waterproofing and protective coating. Like Megamix II with Bio-San, Xypex
Concentrate
diffuses into the concrete substrate and reacts with water and the by-products of cement hydration causing a catalytic reaction.
This reaction generates a non-soluble crystalline formation throughout the pores and capillary tracts of the concrete. Xypex Concentrate has been shown in the laboratory to penetrate to a depth of up to 12 inches and can seal cracks up to 0.4 mm. Both Concentrate and Megamix II permanently seal concrete, preventing the penetration of water and other liquids from any direction, even under high hydrostatic pressure.
Both Xypex Megamix II with Bio-San and Concentrate provide chemical resistance against the attack of acids, chlorides, sulfates, carbonation and other negative effects. Xypex products provide permanent protection that will not degrade like synthetic coatings and membranes.
Saves time and money “We have recommended the use of Xypex crystalline repair and admixture products for many years,” CPH’s Mahler says. “When it comes to wastewater infrastructure in particular, we require that Xypex be used in precast and cast-in-place structures. It’s easy to use and very effective in protecting concrete from multiple exposures.”
Mahler noted that Florida’s Orange County, located in central Florida and home to the city of Orlando, requires Xypex products be used in all of its wastewater structures, including those precast and cast-in-place.
In one case, he explains how Xypex crystalline waterproofing admixture was added to the concrete used to replace a concrete sewage lift station that had become hopelessly damaged by microbial induced corrosion in the late 1990s after just seven or eight years of use.
“We recently had a chance to look in that structure, more than 20 years later, and it still looks almost like new,” Mahler notes. “It was a structure that had a force main coming into it and was very turbulent. That’s when you can get extreme levels of hydrogen sulfide gas released, which results in very rapid concrete corrosion. Common coatings like coal tar epoxies just don’t hold up under these extreme conditions.”
He further explains that it is sometimes appropriate to use multiple products to repair and coat a structure; however, this can take extra time and still does not provide the same benefit as an integral repair product such as Xypex Megamix II with Bio-San or Xypex Concentrate.
“We have used Xypex enough to know it works and provides reliable results we can count on. Why would I recommend three or four products when I can use one. It saves time and money and keeps the work on schedule. It costs a little more up front, yet can extend the life of a structure far beyond that provided by conventional coatings.”
BACK
Also in this section
Off Site
About
Our Company
Crystalline Technology
NO EQUAL
Quality Assurance
Sustainability
Events
Products
Xypex Crystalline Technology
Concrete Waterproofing Testing
The Xypex Advantage
Coating Products
Concentrate
Modified
Additive Products
Admix C-Series
Bio-San C500
Dryshake Products
Concentrate DS Series
Repair & Accessories
Patch'n Plug
Megamix Series
FCM 80
Restora-Top Series
Gamma Cure
Xycrylic Admix
Quickset
Installations
Coating
General Information
Preparation
Mixing
Application
Finishing
Tools & Equipment List
Additive
Dryshake
Repairs
Cracks & Faulty Construction Joints
Estimating Table
Technical
Specifications
Coating
Part 1 General
Part 2 Products
Additive
Part 1 General
Part 2 Products
Part 3 Execution
Bio-San C500 Additive
Part 1 General
Part 2 Products
Part 3 Execution
Dryshake
Part 1 General
Part 2 Products
Schematic Drawings
Additive
Coatings
BIM Objects
Tech Notes
Whitepapers
Method Statements
Product Data
Safety Data
Xypex FAQ
General
Coating
Additive
Dryshake
Projects
Project Search
Wastewater Collection & Treatment
Why Xypex
Meeting the Challenge
The Structures - The Problems
The Permanent Solution
The Right Products
Project Examples
Water Treatment Plants
Why Xypex
Meeting the Challenge
The Structures - The Problems
The Permanent Solution
The Right Products
Project Examples
Water Holding Structures
General Construction-Foundations
Why Xypex
Meeting the Challenge
The Structures - The Problems
The Permanent Solution
The Right Products
Project Examples
Tunnels
Why Xypex
Meeting the Challenge
The Structures - The Problems
The Permanent Solution
The Right Products
Project Examples
Bridges
Why Xypex
Meeting the Challenge
The Structures - The Problems
The Permanent Solution
The Right Products
Project Examples
Power & Utilities
Why Xypex
Meeting the Challenge
The Structures - The Problems
The Permanent Solution
The Right Products
Project Examples
Dams & Irrigation
Why Xypex
Meeting the Challenge
The Structures - The Problems
The Permanent Solution
The Right Products
Project Examples
Marine Structures
Why Xypex
Meeting the Challenge
The Structures - The Problems
The Permanent Solution
The Right Products
Project Examples
Precast Structures
Industrial Structures
Why Xypex
Meeting the Challenge
The Structures - The Problems
The Permanent Solution
The Right Products
Project Examples
Library
News
Xypex News
Register e-News
Literature
Corporate
Project Type
Product
Articles
Videos
Featured Videos
Company & Tech
Products
Projects
Roughcuts
Continuing Education
Online Courses
Lunch Box Seminars
XypexUsers
Architects
Engineers
Contractors
Concrete Producers
Contact
Head Office
Distributors
Search
Privacy Policy
Terms of Use
Distributor Forgot Password
Select a Country
Distributor Only
Distributor Homepage
How to Use This Site
Photos, Videos & Illustrations
Marketing Resources
Company Brochure
Segment Marketing
Online Advertising
Banners
Request Form
Product Data
Create Project Lists
Create or Edit My Lists
Find & Add Projects
Distributor Submissions
Projects
News Articles
Tech Notes
Other
Branding Guidelines
Edit Country Page
Add Project to Country Home
My Profile
Contact Us
Administrator Pages
Distributors Account Management
Add Distributor
Image & Video Archive
Add Image/Video
Projects Management
Add Project
Argentina
Principal
Productos
Proyectos
Videos
Artículos
Literatura
Australia
Main
Products
Projects
Videos
Articles
Literature
Austria
Hauptseite
Produkte
Projekte
Videos
Presse/Puplikationen
Bangladesh
Main
Products
Projects
Videos
Articles
Literature
Brazil
Principal
Produtos
Projetos
Vídeos
Artigos
Bulgaria
основен
Продукти
Проекти
Видео
Cambodia
Main
Products
Projects
Videos
Articles
Literature
Chile
Principal
Productos
Proyectos
Videos
Artículos
Literatura
China
主页
制品
项目
视频
用品
Costa Rica
Principal
Productos
Proyectos
Videos
Artículos
Literatura
Croatia
Glavni
Proizvodi
Projekti
Videos
Književnost
Cyprus-Greek
Κύρια σελίδα
προϊόντα
έργα
Βίντεο
Cyprus-Turkish
Ana Sayfa
Ürünler
Projeler
Videolar
Makaleler
Czech Republic
Hlavní
Produkty
Projekty
Videa
Denmark
Main
Produkter
Projekter
Videoer
Dominican Republic
Principal
Productos
Proyectos
Videos
Artículos
Literatura
Ecuador
Principal
Productos
Proyectos
Videos
Artículos
Literatura
Estonia
Peamine
Tooted
Projektid
Videod
Ethiopia & Djibouti
Main
Products
Projects
Videos
Articles
Literature
Finland
Etusivu
Tuotteet
Projektit
Videot
France
Principale
Des produits
Projets
Vidéos
Des articles
Georgia
მთავარი
პროდუქცია
პროექტები
ვიდეოები
Germany
Main
Produkte
Projekte
Videos
Artikels
Ghana
Main
Products
Projects
Videos
Articles
Literature
Greece
Κύριος
Προϊόντα
Εργα
Βίντεο
Honduras
Principal
Productos
Proyectos
Videos
Artículos
Literatura
Hong Kong-Chinese
主頁
產品
項目
視訊
用品
文學
Hong Kong-English
Main
Products
Projects
Videos
Articles
Literature
Hungary
Főoldal
Termékek
Projektek
Videók
Iceland
Aðalsíða
Vörur
Verkefni
Myndbönd
India
Main
Products
Projects
Videos
Articles
Literature
Indonesia
Indonesia-Indonesian
Utama
Produk
Proyek
Videos
Israel
Italy
Principale
Prodotti
Progetti
Videos
Articoli
Letteratura
Japan
メイン
製品
プロジェクト
ヴィドゥス
Kenya
Main
Products
Projects
Videos
Articles
Literature
Korea
본관
제품
프로젝트
비디오
Kosovo
Kryesor
Produktet
Projektet
Videot
Latvia
Galvenais
Produkti
Projekti
Videos
Lithuania
Pagrindinis
Produktai
Projektai
Vaizdo įrašai
Macau
主頁
產品
項目
視訊
用品
文學
Macedonia
главна страна
Производи
Проекти
Видео-записи
Malaysia
Malaysia-Malay
Utama
Produk
Projek
Videos
Mexico
Principal
Productos
Proyectos
Videos
Artículos
Literatura
Mongolia
үндсэн хуудас
бүтээгдэхүүн
Төслүүд
Видео
Montenegro
Glavna stranica
Proizvodi
Projekti
Snimci
Književnost
Morocco
Page d'accueil
Produits
Projets
Vidéos
Des articles
Littérature
Nepal
Main
Products
Projects
Videos
Articles
Literature
Netherlands
Hoofdpagina
Producten
Projecten
Videos
New Zealand
Main
Products
Projects
Videos
Articles
Literature
Nicaragua
Principal
Productos
Proyectos
Videos
Artículos
Literatura
Norway
Hovedside
Produkter
Prosjekter
Videoer
Pakistan
Main
Products
Projects
Videos
Articles
Literature
Peru
Principal
Productos
Proyectos
Videos
Artículos
Literatura
Philippines
Philippines-Tagalog
Pangunahing pahina
Mga Produkto
Mga Proyekto
Mga Video
Philippines-english
Main
Products
Projects
Videos
Articles
Literature
Poland
Strona główna
Produkty
Projekty
Videos
Artykuły
Portugal
Principal
Productos
Proyectos
Vídeos
Artigos
Puerto Rico
Principal
Productos
Proyectos
Videos
Artículos
Literatura
Qatar
Main
Products
Projects
Videos
Articles
Literature
Romania
Pagina principală
Produse
Proiecte
Videoclipuri
Russia
Главный
Продукция
Проекты
Видео
СТАТЬИ
Senegal
Principale
Produits
Projets
Vidéos
Des articles
Serbia
Glavna
Proizvodi
Projekti
Snimci
Literatura
Sierra Leone
Main
Products
Projects
Videos
Articles
Literature
Singapore
Main
Products
Projects
Videos
Articles
Literature
Slovakia
Hlavná
Výrobky
Projekty
Videá
Slovenia
Glavna
Proizvodi
Projekti
Videoposnetki
South Africa
Main
Products
Projects
Videos
Articles
Literature
Sri Lanka
Main
Products
Projects
Videos
Articles
Literature
Switzerland
Hauptseite
Produkte
Projekte
Videos
Artikels
Taiwan
主頁
產品
項目
視訊
用品
Tanzania
Main
Products
Projects
Videos
Articles
Literature
Thailand-english
Main
Products
Projects
Videos
Articles
Literature
Thailand-Thai
หน้าหลัก
ผลิตภัณฑ์
โครงการ
วีดีโอ
วรรณกรรม
Tunisia
Page d'accueil
Produits
Projets
Vidéos
Des articles
Littérature
Turkey
Ana Sayfa
Ürünleri
Projeleri
Videoları
Makaleler
Uganda
Main
Products
Projects
Videos
Articles
Literature
Ukraine
ГОЛОВНА
ПРОДУКЦІЯ
ПРОЕКТИ
ВІДЕО
United Arab Emirates
Main
Products
Projects
Videos
Articles
Literature
United Kingdom
Main
Products
Projects
Videos
Articles
Literature
Venezuela
Principal
Productos
Proyectos
Videos
Artículos
Literatura
Vietnam
Vietnam-english
Main
Products
Projects
Videos
Articles
Literature
Vietnam-Vietnamese
Chủ yếu
Các sản phẩm
Dự án
Video của
Scroll to top
↑