New Tilt-Up Concrete Segment Manager Tom Bozzano

Nox-Crete has brought Tom Bozzano on board as the Tilt-Up Segment Manager. Tom has over 25 years working in concrete construction as a Tilt-Up concrete Project Manager and Estimator. He has effectively negotiated with general contractors. Tom has managed construction teams to deliver projects on schedule and within budget. He is ACI Tilt-Up and Bluebeam certified.

“It’s great to bring this much hands-on field experience into the Nox-Crete team. Tom brings a practical perspective to our technical service model,” said Michael Linn, President of Nox-Crete. “Tom knows what he’s talking about. He has already given valuable insight to our Research and Development team on a new accessory line for Tilt-Up concrete construction.”

Nox-Crete Listens to Concrete Contractors for New Product Ideas

Gluing down the Clean Line Reveal

Gluing down the Clean Line Reveal

Recently, Nox-Crete has brought to market cost-saving Tilt-Up accessories that improve results. Clean Line Reveal extruded PVC rustication strips leave incredible tilt wall panel detail with limited patching requirements at a low applied cost. Nox-Crete is also launching a new precision engineered laminated veneer lumber edge form called Pac Form. Preliminary testing shows that Tilt-Up contractors can expect to get up to 20 repours with this material without warping.

 

Clean Line Reveal for Tilt-Up concrete construction

Clean Line Reveal results on unfinished wall

Tom will be responsible for bringing these new accessories to market, along with supporting the sales of the Silcoseal family of Tilt-Up concrete cures and bondbreakers.Contractors prefer Silcoseal because they get nice, clean Tilt-Up concrete panels that require very little patch or repair. Nox-Crete delivers 100% compatibility between Silcoseal bondbreaker and Nox-Crete floor hardeners to reduce risk for the project team. And Silcoseal is rain resistant, which makes it a dependable choice no matter where you are located.

He is a big baseball fan who is currently based in Las Vegas. He is excited to move his family to Omaha, Nebraska – the home of the College World Series. Tom holds an Associate Degree in Applied Science from Wyoming Tech.

Tom will participate in the Tilt-Up Concrete Association.

 

Clean Line Reveal at World of Concrete 2017

The Nox-Crete team is on the road in 2017! Join us in South Hall booth S11439 to learn more about Clean Line Reveal - an innovative and cost effective reveal/rustication product designed to maximize the architectural aesthetics of buildings using tilt-up and/or pre-cast construction techniques.

Extruded using high density PVC, Clean Line Reveal offers the following advantages:

  • Lightweight and durable – Clean Line Reveal is a fraction of the weight of typical wood reveals and provides unique durability to construction traffic due to its composite “strut” design.  High Density PVC material and white color make it largely unaffected by climatic changes.
  • Easy Installation – Clean Line Reveal is installed using a custom formulated adhesive to maximize adhesion between a cured concrete casting slab and Clean Line Reveal.  No more time consuming drilling and fastening of wood reveals to floor slab, resulting in a floor slab requiring unsightly patchwork repairs.
  • Clean Release – Clean Line Reveals maintain their extruded dimensions, regardless of climatic conditions and remain on the floor when tilt panels are lifted, thereby eliminating costly rental equipment and “sack & patch” work to the panel face.  The more conventional wood reveals are susceptible to moisture swelling and can leach sugars onto the concrete panel face, resulting in discoloration of the panel face and the wood reveal “stuck in the tilt-up panel”.
  • Cost Savings – Installed cost of Clean Line Reveal provides significant cost savings by reducing labor and equipment rentals through its ease of handling, clean release, and minimization of wall and floor slab repairs.
  • Premium Architectural Aesthetics –Sharp lines from an extruded profile ensure consistency in appearance and cleanness of lines.  Multiple profiles available to satisfy your imagination.

We'll have a display of Clean Line Reveal at our World of Concrete booth. See you in Vegas!

Properly Removing Bondbreaker from Concrete Can Help Cut Potential of Tilt-Up Floor Sweating

by Craig Coppersmith, P.E., VP Technical Sales & Marketing

Nox-Crete strives to create the highest quality chemicals for the concrete industry, and to consult with architects, engineers, contractors and distributors regarding the use of our products and their impact on the maintenance of concrete. Our goal is to ensure that those products enhance both the performance and appearance of concrete floors.

Recently, there has been much discussion in the concrete construction industry regarding the phenomenon of sweating floor slabs (commonly referred to as Sweating Slab Syndrome) in warehouses and distribution centers. There are multiple factors that have been suggested to contribute to Sweating Slab Syndrome, including trace amounts of reactive bondbreaker that may remain on floors in casting areas.

Understanding and sharing in the concerns about Sweating Slab Syndrome, the Nox-Crete team set out to verify that our Silcoseal Cure and Bondbreaker could be effectively removed from a tilt-up floor following our standard recommendations for removal, which is cited in our product data sheets. This would validate our recommended processes for removal of Silcoseal Cure and Bondbreaker and eliminate it as a possible contributor to the Sweating Slab Syndrome, by virtue of a proven method for its removal.

To demonstrate that Silcoseal Cure and Bondbreaker testing, sweating slab, bondbreakercould be effectively removed, Nox-Crete contracted with Nelson Testing Laboratories (NTL)—an independent, certified testing agency—to perform a mock tilt-up using Silcoseal Cure and Bondbreaker and Nox-Crete’s citrus-based stripper, Bio-Clean Concentrate CPC, for the removal.

Analysis Process
NTL mixed and poured concrete into a 9-foot x 4-foot x 2-inch thick mold. The concrete surface was finished with a steel trowel and coated with two coats of Silcoseal Cure and Bondbreaker, applied at 400 sf/gallon, 24 hours apart. After another 24 hours, a concrete wall panel was cast on top of the original concrete specimen. After another 48 hours, the wall panel was separated from the original concrete specimen.

The exposed face of the concrete casting surface was then sectioned into three equal parts: uncleaned; cleaned with Bio-Clean diluted 1:3 with water; and cleaned with Bio-Clean diluted 1:5 with water.

The uncleaned sample was left untouched. The area cleaned with Bio-Clean diluted 1:3 was stripped with a 1:3 ratio of Bio-Clean Concentrate CPC to water solution, using a nylon scrub brush simulating a downward force of 100 pounds. The area cleaned with Bio-Clean diluted 1:5 was stripped with a 1:5 ratio of Bio-Clean Concentrate CPC to water solution, using a nylon scrub brush simulating a downward force of 100 pounds.

Four 50-gram samples were then extracted from the concrete casting surface—plain concrete; concrete exposed to Silcoseal Cure and Bondbreaker but not stripped with the Bio-Clean solution; concrete exposed to Silcoseal Cure and Bondbreaker and stripped with the 1:3 Bio-Clean solution; and concrete exposed to Silcoseal Cure and Bondbreaker and stripped with the 1:5 Bio-Clean solution.

Methods of Analysis
The four pulverized concrete samples were chemically extracted with η-hexane. To remove all organic substances, 50 grams per each of the four samples were extracted.

The liquid extract from each of the four concrete samples and the liquid samples of the Silcoseal Cure and Bondbreaker and Bio-Clean Concentrate CPC were dried on a universal diamond Attenuated Total Reflectance Accessory (ATR) for Infrared Spectroscopy, then analyzed using a Perkin Elmer Spectrum Model One Fourier Transform Infrared (FTIR) Spectrometer, with a configuration of resolution of 4 cm-1 and eight accumulations (number of scans) per sample.

Samples Received for Analysis
Six samples were analyzed:
A)   Bio-Clean Concentrate CPC (liquid sample)
B)   Silcoseal Cure and Bondbreaker (liquid sample)
C)   Plain concrete not exposed to Silcoseal (50 g. sample – pulverized concrete)
D)   Concrete exposed to Silcoseal, not cleaned (50 g. sample – pulverized concrete)
E)   Concrete exposed to Silcoseal, stripped with 1:3 ratio of Bio-Clean Concentrate CPC to water (50 g. sample – pulverized concrete)
F)   Concrete exposed to Silcoseal, stripped with 1:5 ratio of Bio-Clean Concentrate CPC to water (50 g. sample – pulverized concrete)

Extraction and Infrared Spectroscopy Analysis Results
Evidence of the presence of Silcoseal Cure and Bondbreaker was not found in three of the pulverized concrete samples (Samples C, E & F). However, Sample D, the pulverized concrete that was exposed to Silcoseal but not cleaned, contained a detectable amount of organic extract, indicating the presence of Silcoseal─as expected.

Both of the stripping solution ratios (1:3 and 1:5) of Bio-Clean Concentrate CPC to water effectively removed the Silcoseal Cure and Bondbreaker.

The infrared spectra of both of the extracts from Samples E & F show a sharp absorption band around 1100 cm-1 (frequency), which is due to the presence of the Bio-Clean. Organic substances from the Silcoseal Cure and Bondbreaker are not evident in the spectra of Samples C, E & F, but are evident in Sample D.

Summary: Nox-Crete’s Interpretation of the Analysis Results
Proper surface preparation will remove all trace amounts of Silcoseal Cure and Bondbreaker and its heavy metallic soaps from concrete tilt-up floors. If no Silcoseal Cure and Bondbreaker residue remains on the tilt-up floor, it cannot contribute to Sweating Slab Syndrome.

NOTE: NOTE: These independent tests were only conducted on Nox-Crete-branded products. It is unknown whether other brands of reactive bondbreakers can be successfully removed.These independent tests were only conducted on Nox-Crete-branded products. It is unknown whether other brands of reactive bondbreakers can be successfully removed.

The most effective way to remove Silcoseal Cure and Bondbreaker residue is with Nox-Crete’s Bio-Clean Concentrate CPC. Nox-Crete recommends taking these steps to remove bondbreaker residue from concrete floors:

  • Dilute Bio-Clean Concentrate CPC 1:1 with water for stripping heavy coatings. For removal of lighter coatings,dilute with a ratio of 1:3.
  • Uniformly apply by sprayer or through an automatic floor machine at an application rate of 200-300 sf/gal (5-7.5 sm/L).
  • Allow product to dwell on the floor surface for 20-30 minutes while aggressively scrubbing the surface with an automatic floor machine equipped with nylon scrub brushes.
  • Squeegee the surface clean and rinse thoroughly with water.

Follow these links to learn more about Nox-Crete's line of Silcoseal Cure and Bondbreakers and Bio-Clean Concentrate CPC, or call our customer service team at 402-341-2080.