Today I'd like to discuss a little "foam 101" info that addresses some commonly asked questions I get from slab lifting customers:

Density and Expansion

Technical Data for Each AP Lift Foam

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A large part of the market is still using old sprayfoam insulation guns to do heavy concrete lifting work. Let's take a look at some of the benefits of using a gun that's custom designed for slab lifting...

The Problem with Sprayfoam Insulation Guns Adapted for Slab Lifting

Don’t bring a knife to a gunfight! Sprayfoam insulation guns are made for the simple process of spraying foam at constant pressures. Slab lifting requires a gun that is designed to deal with changing pressures and back pressure without backing up or crossing over. Issues like leaky port connections, constant cleaning, and constant fumbling around with a clamp can drastically reduce production - adding a lot of man hours to each project. Not to mention long nights spent rebuilding and cleaning the gun after EVERY job. Did we mention that feeling in the pit of your stomach every time you have to call in yet another expensive replacement parts order? 

The Solution: A Gun Designed by Slab Lifting Experts for Slab Lifting Contractors

The MixMaster Pro was designed based on years of feedback from slab lifting contractors working in the field. Every known point of frustration and difficulty has been addressed in this sturdy, single-purpose gun. Further benefits include a lower cost of consumables (you can reuse ports with this gun), beefy check valves designed to handle the back pressure, and a short 10-minute breakdown/cleaning session at the end of each day. Not to mention the fact that this gun is a production BEAST - no leaky port connections, no fumbling with clamps. Watch your man hours on each project shrink accordingly. Did we mention you’ll have less replacement part orders? There are only a few inexpensive replacement parts on this gun - PERIOD.

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Nationwide, municipalities regularly deal with the issue of infrastructure deterioration. One of the most common types being the constant appearance of water leaks. Active leaks, when untreated, can cause an accelerated deterioration of reinforcement within concrete, as well as settlement issues caused by voids below and next to structures.

The purpose of this article is to illustrate how polyurethane injection can be used as a preventative measure to prevent more serious problems.

Municipal Structures Vulnerable to Infiltration

Various areas in the wastewater, drinking water and storm water system may require polyurethane to stop infiltration. This is mainly due to its clean application and rapid results. These areas include but are not limited to:

• Manholes
• Water Treatment and Storage Tanks
• Lift Stations
• Storm and Sanitary Pipes

How Spetec GT500 Seals Hairline Cracks

This graphic depicts the polyurethane leak seal process when applied to the wall of a water tank. Our leak seal resin, Spetec PUR GT500, reacts when it comes into contact with water. It bonds to concrete in a durable manner, yet remains flexible so as not to crack if the concrete shifts in the future. High pressure injection insures that every part of the crack is filled and permanently sealed. This product is certified To NSF 61-5 (approved for contact with drinking water).

How Spetec PUR H200 Stops Gushing Leaks

This graphic depicts the process when applied to a larger leak with a void in the soil on the other side. While the graphic depicts a box culvert, voids like this can develop next to water tanks that are built against a hillside, manholes, pipes, etc. Spetec PUR H200 is used to fill the void and stop the gushing leak in the process. This product is certified To NSF 61-5 (approved for contact with drinking water).

Another Common Issue: Leaks in Equalization Tanks

Another common issue is leaks around the bases of equalization tanks. This untreated water can present a hazard to employees. Left unaddressed, it just costs more and more money to keep pumping this water back out.

Conclusion

Regardless of the leak seal issue at hand, one thing is certain: left untreated it will cost more money and do more damage in the long run. In this case the old adage “An Ounce of Prevention is Worth a Pound of Cure” is completely appropriate. Are you a municipal manager facing any of these issues? Technical Consultants at Alchemy-Spetec have a great deal of experience with leak seal solutions for municipalities. Call us at 404-618-0436.

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On April 1st, Alchemy-Spetec had the honor of presenting Paul "Captain Grout" Layman with a Lifetime Achievement Award for his distinguished career in the construction chemical industry. The award was presented during a dinner at the Harraseekat Inn restaurant in Freeport, Maine (where Paul now resides). Jim Spiegel joined Paul and his wife and a few close friends for the ceremonial presentation of the award. With some of his closest lifetime friends in attendance, it was a fitting occasion to share reflective stories and laughs from those who know Paul best.

As most in the chemical grouting industry know, there are few as experienced, or memorable, as Captain Grout. Paul spent most of his career in the Pacific Northwest serving sales and field support needs throughout the US West Coast, and Western Canada. He provided innovative and successful chemical grouting solutions to hundreds of municipalities, government agencies, and contractors. Without a doubt, Paul’s most valuable quality to clients was offering his industry-leading hands-on expertise to provide contractors new service offerings. No two chemical grouting jobs are the same, but Captain Grout was able to navigate these challenges with relative ease.

“For 14 years, I have known Captain Grout as a competitor, and as a teammate, and from experience, it is much more enjoyable working with him than against him. His technical expertise and unique personality made him a true industry force. We wish him all the best in retirement, and hope to carry his torch in the industry for years to come.”

]Jim Spiegel
VP of Sales & Business Development
Alchemy-Spetec

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(Today we feature a guest blog from our customer Randy Serhan, owner of JACC Structures in Saskatchewan.)

First of all, I'd like to thank Alchemy-Spetec for asking me to write a guest post on their blog.  If you're interested in polyurethane leak seal, I think you'll like this one.  I recently did a leak seal job for a homeowner up here in my Candian hometown of Nipawin, Saskatchewan.  He had water coming into his basement around a water line access sleeve.  It was leaking approximately 1/2 litre of water per minute.  He called me to see if I could resolve the issue.  I packed some oakum saturated with Spetec PUR GT500 into the sleeve around the water pipe.  The leak was stopped in under a minute.  I used a moderate quantity of the resin-saturated oakum to ensure the plug was approximately two inches deep.  It won't leak again.  The customer was extremely happy as this repair means he will no longer have to babysit the water pails all night.  He also has the peace of mind of knowing that this is a long lasting fix, so he doesn't have to re-visit the problem each spring or heavy rainfall.  When that leak shut down so fast, he look at me and said "that stuff is magic".

And now for the best part: click below to watch me shutting down that link in this video clip I took on the job!

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Slab stabilization and structural void filling can actually be even more valuable than slab lifting. Why wait for a slab to sink, settle, or break, when it can be stopped. Preventative slab stabilization and underslab recompaction (I'm making up words now) is a great way to protect the investment that is the foundation of any home or business.

A good contractor should know how to: spot the signs indicating a possible problem, verify whether a problem exists or not, and repair an unsupported slab that’s in danger of sinking.

How to Spot a Slab That May Be in Danger of Sinking

The most obvious slabs at risk are the ones where a void can be seen from the side. In these instances, the soil on the side has washed away along with significant soil underneath. (See the photo included with this blog post for an example.) Other situations to look out for are slabs on a hill or at the bottom of a hill. Concrete in these locations is likely to have rain water washing under it and eroding the soil. Slabs on level ground aren’t immune from this problem either. Check for gutter downspouts placed very close by, or adjacent structures with no gutter system at all. If a rain water management system wasn’t set up to direct water AWAY from the slab, there may be an issue. Another red flag would be cracks in the concrete.

How to Be SURE a Slab’s in Danger of Sinking

There are many ways to check for voids underneath a slab. Some people tap the slab with a metal tool, or even a golf club. (Others use golf balls, which they bounce off the slab). Whatever the tool, the point is to listen for a hollow ring. This tactic may take some practice at first, but many people use it. Another approach is to drill a small hole, and then check the soil underneath with a soil probe or a penetrometer. I find that the 4’ long fiberglass driveway markers make a nice probe.  Endoscope cameras are small enough to stick down through the drill hole and have a look around. On larger jobs, some have arranged for the use of ground penetrating radar.

How to Stabilize a Level Slab in Danger of Sinking

On a void fill/stabilization job, the contractor should set up an even grid pattern across the entire slab. This approach allows for the even distribution of material, as needed. Unlike a lifting job, there’s no need to emphasize one side of the slab versus the other. Instead, the contractor injects the appropriate amount of resin into each hole of the even grid pattern. It’s important to monitor every injection with a zip level or dial indicator and stop at the first sign of any movement. If ANY slight movement happens it’s time to move on to the next hole. These tools allow for the detection of movement as small as 100^th of inch, which isn’t a visible lift to the naked eye. For more on stabilizing slabs, see the blog post Slab Void Fill with Polyurethane Foam.

Wrap Up

No property owner should assume that their slab is safe just because it isn’t sinking yet. It’s better to know the danger signs and call a qualified professional to check it out. In addition, contactors should always keep an eye out for concrete in vulnerable situations. Remember: just because it’s level doesn’t mean it’s safe.

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Voids beneath warehouse floors can be filled with AP Lift 475 foam. This product is great for slabs that rock and warehouse floors that have begun to sink. The video below shows an example of the product in action. Inside this warehouse, the floors have begun to rock and are unleveled - which can speed up wear and tear on valuable equipment. With this powerful polymer and its painless application procedures, unlevel slabs can be repaired at a rapid pace. Take a look for yourself!

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As the Marketing Director at Alchemy-Spetec, one of the most common questions I get from contractors is how to get leads for jobs.  Since it’s in OUR interest for YOU to get as many leads as possible, we’ve put a lot of thought into that question.  In addition to the technical tips we share in the majority of our blog posts, we try to include business and marketing tips on occasion in order to help you find those leads.  This article is about a marketing method that we’ve found extremely helpful – blogging.  We know it works from our own experience and in this post, I’ll explain how you can promote your contracting business with a blog. 

Cast a Wide Net with Lots of Posts

The more pages you have on your website, the more chances there are for someone to find it when searching a specific phrase or term.  Search engines are scanning your page names, heading text and page text when someone searches a term to see if there are any matches.  So, it’s in your best interest to have as many pages full of relevant content as you can.  A blog is the perfect way to accomplish that goal. 

Say, for example, that you are a slab lifting contractor in San Pedro, California.  You can write up case studies of jobs you’ve performed in your area.  Make sure your blog titles include terms people will likely search for.  For example, a post about a warehouse floor job could be titled, “Warehouse Floor Slab Lift in San Pedro”.   You get the idea, right? 

Share Your Knowledge and Build Trust 

You can also use a blog as way to share your knowledge and experience with potential customers who are looking for answers.  Take some time to consider all that you’ve learned over the years and jot down ideas for blog posts that potential customers may find helpful.  In addition to case studies, you can write posts instructing people how to spot problems on their property, comparing your repair costs to the costs of replacing a structure, educating people about the materials you use, etc. 

You can get quite a few ideas by browsing the posts in our blog.  While our articles are aimed more at contractors than property owners, you’ll still find many useful subjects to get your brainstorming started.  The more useful knowledge you share, the more trust you can build with potential customers.  People are much more likely to buy a service from a known expert, than from a complete stranger. 

Offer More Value in Exchange for Contact Info 

Driving up web traffic is a good thing.  Establishing yourself as an authority by creating useful content is also very helpful.  If you just do those two things, you should get more people calling you and filling out the contact form on your website.  But if you REALLY want to jumpstart the leads, you need to offer something of value in exchange for your reader’s contact info.  At the end of every article, include a link to a relevant brochure – or something else of value – and ask for their contact info in exchange.   For an example, see the button at the bottom of this blog post and the form that it leads to. 

The Gift That Keeps on Giving 

The great thing about a blog post with a lead capture form at the end is that, once you set it up – it’s there forever.  We still get leads from blog posts we put up years ago.  If you consistently write articles, you can create a compounding effect with more and more leads coming in each month. 

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In the previous installment of this two-part series, we looked at common slab settlement danger zones, causes of sinking slabs, and the many risks of neglecting a known trip hazard. This time around we’ll review the two most common non-polyurethane repair options, and then explore the three most common types of polyurethane slab repairs.

Non-Polyurethane Repair Options

Aside from polyurethane repair, the property owner has two other options: replacing the slab or mudjacking it with cement grout.  There are drawbacks for both.

Tear Out and Replace

Ripping out a slab and putting in a new one has three main disadvantages.  Namely, the process is…

• Environmentally unfriendly (landfill bound?).
• Messy (requiring heavy equipment and possibly damaging the surrounding area).
• Time consuming.

Mudjack with Cement Grout

Mudjacking may be less expensive than replacement, but the property owner is still facing a number of issues.

• It’s still a messy process.
• Cement grout washes out.
• The grout is heavy and can sink over time.
• The grout can crack and shrink over time.
• Not an impermeable water tight solution.

Structural Polyurethane Repair

Polyurethane repair has distinct advantages over replacement and mudjacking.

• Very clean installation process.
• Lighter than cement mudjacking grout and won’t sink over time.
• Will not shrink.
• Closed cell structure makes it water impermeable.
• Typically less expensive than replacement.
• Less time consuming to apply than a mudjacking or replacement solution, and ready for traffic 45 minutes after application.

Not to mention the strength of these polymers. For more on that subject, see our blog post Slab Jacking with Polyurethane Foam - How Strong is Strong Enough?

Trip hazard repair with polyurethane resin can require one or a combination of the following three approaches: lifting, soil stabilization and void fill.  Let’s take a close look at all three…

Lifting

Sunken concrete slabs can be lifted back into place with a-two component structural polymer foam designed to work in wet or dry conditions. The expansion force of the foam coupled with the pressure of a PMC proportioner pump can generate enough controlled force to lift virtually any structure back into position within 1/10” of the intended level.

Soil Stabilization

Unstable, eroded, or loose soil below infrastructure can result in settlement, damage to the structure above, and of course – trip hazards. Voids can be filled, soil consolidated, and water migration halted by permeating the soil with one of our ultra low viscosity polymer resins. Once the bearing capacity of the soil has been increased with this process (soil has been stabilized), then the structure can be lifted with our slab lifting process.

Void Fill

Water erosion beneath slabs can cause voids to form that weaken the structural integrity and allow higher water pressure to develop. Filling these voids with rapidly expanding foam that is designed to react in the presence of water will return the integrity to the structure and prevent trip hazards. We have polyurethane resins designed specifically for this type of application.

Whether you’re a property owner looking for a professional to repair trip hazards on your property, or a contractor looking for material and/or technical assistance – Alchemy-Spetec is at your service.  Give us a call at 404-618-0438 to discuss your trip hazard concerns.

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