Basecrete Intercept Application

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C

coolpoolboi

New member
Sep 11, 2024
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DFW
Im in the middle of my DIY build and we'll be shooting gunite on Friday!
Looking to try anything I can to stregthen the shell and prevent concrete cancer. My pebblesheen sub recommended Basecrete unsolicited, so that perked my ears. Basecrete Intercept looks like a cost effective and and easy way to achieve this.

How long after the shell is shot should I wait to apply? Also, any special surface prep you recomend?
 
Hey there :). While I can't speak directly as to Basecrete, here are some previous posts that mention it. Perhaps one or two will be interesting to you:

Waterproofing Concrete Shell Prior to Plaster

As the title of the thread states, what are your thoughts of waterproofing (or damp proofing as some would say) the concrete shell prior to the plaster being installed with a product such as Basecrete? Does the entire pool require it? If not the entire pool, how about a raised spa or an...
www.troublefreepool.com www.troublefreepool.com

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Last edited:
C,

You should get whatever you want... But, my money is on "Scam alert".. :mrgreen:

I'm sure it will not hurt anything, but at the same time I doubt that that it will make any real difference..

Thanks,

Jim R.
 
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BENEFITS
• Waterproofs the surface of the concrete
• Densify and strengthens the concrete
• Controls hydration of new concrete
• Exfoliates entrapped salts
• Reduces rust formation on rebar
• Reduces ASR (alkali silica reactivity)
• Accelerates concrete curing time.

basecreteusa.com

Intercept Densifier - #1 Concrete Waterproofing Product

#1 Concrete Waterproofing System In The World. Basecrete Is The Only TWO COAT Waterproofing System That Protects Concrete From Water & Chemical Damage.
basecreteusa.com basecreteusa.com
 

ASR - Concrete Cancer - Austin, TX

Has anyone had experience with this issue? Alkali–silica reaction - Wikipedia. 3yr old - fresh water pool with cracks all over the walls Apparently the Shot Crete company (among others here) had not mixed right and messed up a number of pools. Edit by Jim R. thansk
www.troublefreepool.com www.troublefreepool.com

ATXheat said:
Use water damming / water proofing membranes in the construction
Click to expand...
JamesW said:
Aggregate is usually inert, meaning it is unreactive and ideal to use in concrete.

However, some aggregates can react with the alkali hydroxides in concrete, causing expansion and cracking over a period of many years.

This alkali aggregate reaction has two forms: alkali-silica reaction (ASR) and alkali-carbonate reaction (ACR).

That is why it is very important to test the aggregates for ASR and ACR reactivity before the aggregates are used in concrete.

Click to expand...

JamesW said:


Resources - American Shotcrete Association

Position Statements ASA has produced position statements on the best practices for proper shotcrete placement. To date, position statements have been issued by the ASA Board of Directors, Underground Committee, and Pool & Recreational Shotcrete Committee. These statements have also been...
shotcrete.org shotcrete.org



watershapes.com

Concrete Cancer: Alkali Silica Reaction (Part I) - Water Shapes

While concrete is the world’s most used building material, it is comprised of natural elements and can be susceptible to potentially destructive problems. As Paolo Benedetti explains here in the first of a three part-series, Alkali Silica Reaction, (ASR) is among the most common and highest risk...
watershapes.com watershapes.com

watershapes.com

Concrete Cancer Part II - Water Shapes

As discussed in Part I, Alkali Silica Reaction (ASR) is a common and potentially devastating “disease” that afflicts concrete. It’s caused by reactions that take place between the alkali compounds in cement and silica in many types of aggregate that grow and spread in the presence of water...
watershapes.com watershapes.com

watershapes.com

Concrete Cancer III (a perfect storm) - Water Shapes

As Paolo Benedetti explains in this conclusion to his series on Alkali Silica Reaction, although the problem can be avoided with basic and well-known precautionary measures, it is almost impossible to cure once the problem starts. The business implications are grim for watershapers who are being...
watershapes.com watershapes.com

About Paolo Benedetti | Aquatic Technology Pool & Spa | Creating water as Art | Infinity Pool Design, Construction, Luxury Pools, Custom Color Lighted Spas, Animated Fountains, Aquatic Art, Expert Witness | Located in Morgan Hill, CA Serving Internat

Pool Design, International Swimming Pool Designer, Paolo Benedetti, Aquatic Technology Pool and Spa, The international standard for innovative pool designs with expertise in vanishing edge pools, infinity edge pools, negative edge pools, knife edge pools, hillside pools, rooftop pools...
www.aquatictechnology.com www.aquatictechnology.com
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Basecrete "Intercept" on fresh gunite shell??

I've heard Basecrete Intercept (primary shell waterproofer, concrete densifier) is a great option to apply to a fresh gunite shell (simple garden sprayer application!). BUT, I've been told by my PB that the gunite shell doesn't need a waterproofer except for the waterline where the tile will...
www.troublefreepool.com www.troublefreepool.com

Basecrete Intercept Needed?

What is everyone's opinion on basecrete intercept? Is it worth treating the pool shell prior to tile and plaster for extra assurance or am I just wasting my time and money?
www.troublefreepool.com www.troublefreepool.com

Waterproofing Concrete Shell Prior to Plaster

As the title of the thread states, what are your thoughts of waterproofing (or damp proofing as some would say) the concrete shell prior to the plaster being installed with a product such as Basecrete? Does the entire pool require it? If not the entire pool, how about a raised spa or an...
www.troublefreepool.com www.troublefreepool.com

Basecrete Waterproofing

Hi. I'm new to this forum, but have benefited so much from the information posted here. Thanks to all of you for your contribution. I'm currently building a 2 foot high - 20 foot diameter round fountain with the normal pool equipment. I've build the 3 course high wall with bond beam CMU...
www.troublefreepool.com www.troublefreepool.com
 
www.poolmagazine.com

Basecrete Xtreme ASR Remediation Coming to US Market

The recent rise in Alkali-Silica Reaction (ASR) cases has raised serious concerns within the pool industry. ASR, commonly referred to as “concrete cancer,” is an insidious issue that compromises concrete […]
www.poolmagazine.com www.poolmagazine.com

www.aquablumosaics.com

Waterproofing: An Essential Step in Assuring the Health of Your Swimming Pool

It may not be as sexy as picking out glass tile or as fun as selecting a mermaid pool mosaic, but waterproofing the cement foundation of your pool is an important process that needs to be done right to save you money and sleepless nights down the road. Something that isn’t discussed much in the...
www.aquablumosaics.com www.aquablumosaics.com
 

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coolpoolboi said:
Looking to try anything I can to strengthen the shell and prevent concrete cancer.
Click to expand...
Have you talked to the builder to see if they are aware of the issue and are knowledgeable about how to ensure good concrete?

Most likely, the issue should be resolved because the concrete suppliers should know how to prevent the problem.

Maybe ask to talk to the concrete supplier to see if they know how to specify a proper concrete mix.

Is the gunite/shotcrete shoot being subcontracted?

If yes, talk to the subcontractor.

What psi are you getting?
 
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ASR is not something that you get from the environment interacting with the concrete. It’s caused by improper mixture of contaminated materials at the concrete manufacturing facility. Applying some surface coating to a contaminated mix is not going to stop ASR from happening.
 
A good concrete mix should not get ASR even without a waterproof layer.

However, if the mix has any reactive aggregate, then the presence of water penetrating into the concrete will accelerate the reaction.
 
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If the Gunite/Shotcrete mix is really good and applied correctly, then you should not have issues.

If the mix is really bad, then you will have problems that will develop over time.

Water can penetrate from the pool side as well as the ground side if the ground water is high.

The best insurance is to make sure that all parties including the Gunite/Shotcrete shooters and the concrete supplier know about ASR and have done everything to eliminate the causes, especially the reactive aggregates.

If you have raised walls, then a waterproof layer is recommended to prevent bleedthrough and efflorescence.

Overall, I would probably go with the Basecrete.
 
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Sufficient Moisture

Available moisture is important when considering the potential for ASR-induced damage in field structures.

Concrete mixtures comprised of highly reactive aggregates and high-alkali cements have shown little or no expansion in certain very dry environments.

Likewise, local differences in moisture availability within the same structure have resulted in vastly different performance within that structure.

Specifically, portions of the structure exposed to a constant or steady source of moisture (e.g., as a result of poor drainage or poor detailing) have exhibited significant ASR-induced damage, while other portions of the structure that remain essentially dry have shown little or no damage.

Therefore, the exposure conditions, in general, and the availability of moisture, specifically, play key roles in the durability of field structures.
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Chapter 2. Alkali-Silica Reaction - Interim Recommendations for The Use of Lithium to Mitigate Or Prevent Alkali-Silica Reaction (Asr), July 2006 - FHWA-HRT-06-073

www.fhwa.dot.gov www.fhwa.dot.gov
 
"To provide additional protection, CBI also recommends applying waterproofing membranes.

In the U.S., the most commonly applied preventive and remedial measures are those which control the ingress of water in the concrete (Tantawi, 2014). Waterproofing coatings are commonly used for this purpose.

A successful coating has to fulfill the following requirements:

Be chemically resistant to the alkalinity of concrete.

Have sufficient adhesion and water vapor permeability (prevent water from being trapped inside the concrete).

Be compatible with the expansion of concrete and be water repellent."

A Practical Approach to ASR Mitigation in Existing Structures

www.structuremag.org www.structuremag.org
 
"Moisture and Permeability Reduction:

High humidity is absolutely necessary for the continuation of ASR.

The gel resulting from the reaction will swell by absorbing water and cause expansion of the material.

Keeping material dry and away from the water is an effective way to stop the reaction.

Buildings that are open to the atmosphere such as airport runways, taxiways, aprons, road pavements, structures that contact with water such as bridges, dams are more likely to be exposed to ASR.

Decreasing the permeability in the material slows the formation of the reaction because it restricts ion movement.

However, the impermeability of the material also has negative effects."

www.mekaglobal.com

Case Study Alkali Silica Reaction-Concrete Cancer - MEKA

Case Study Alkali Silica Reaction-Concrete Cancer
www.mekaglobal.com www.mekaglobal.com
 

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