Mudjacking verses Slabjack Geotechnical polymer injection

Mudjacking Verses Polymer Injection
Mudjacking Verses Polymer Injection

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In some of the communities we serve we have other companies offering the same service, concrete raising. This post explains the differences in both methods, mudjacking and polymer injection.

Both methods will raise concrete. Mudjacking is, or should be less costly. Polymer injection is a better choice in appearance. Beyond these two differences becomes who the company is doing the work. Slabjack Geotechnical does hundreds of jobs annually, most of our competitors are single operators, will the company even be in business to honor their warranty?

Speaking about warranty, we offer a limited five-year warranty. Far superior to the one or two-year offerings of our competitors. And we warranty our material for 25 years from degradation.

Back to the differences;

Hole size drilled in slab?  Mudjacking 1-2″ holes.   Polyurethane injection 5/8″

Material? Mudjacking- Native soil mixed with Portland cement, fly ash or lime.  Polyurethane- Various formulations for lifting, void filling, undersealing and water proofing.

Equipment – Mudjacking- grout mixer, water source, grout pump, hoses.  Polyurethane injection- Reactor, heated hoses, injection gun.

While both methods will raise concrete Polymer injection is less invasive, using much smaller and fewer holes, provides more uniform support under the slab, is a quicker process and allows for immediate use after raising.

call today,

Superior technology, Superior polymers, Superior results.

Concrete Raising with Multiple Polymers

 

Concrete Raising with Multiple Polymers
Concrete Raising with Multiple Polymers

 

Concrete Raising with Multiple Polymers.

One of the advantages of using Slabjack Geotechnical is we are the only company in our market large enough to carry multiple polymer reactivities and densities on our rigs. The advantages to doing so are many, here are three;

1) By carrying both a dense lifting polymer and a very slow rise void fill polymer we can not only do either type of job but can do large lifts without the risk of cracking the slab during the void fill portion of the job. This advantage is a great reason to hire us rather than a competitor.

2) Relating to number one above, voids filled with a very slow rise polymer are shown to much better fill the voids created as slabs are raised. This better supports the slab rather than the “pillows” of support other methods generate.

3) Cost. By utilizing a two polymer lift and support we are able to drill far less injection holes for the void fill portion of the job which saves you money while providing a superior end result.

We are the most experience Slabjack contractor using the advanced polymer injection method call today,

1-855-752-2522

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.

How to fix erosion under concrete slabs

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Erosion of soil is a very common problem. Whether it be ground water movement, drainage, rodents or sprinklers, when soil is carried away settling concrete is sure to follow. So what should you do if you notice erosion around or under your concrete slabs?

Many people will attempt to fill these voids with dirt, sand or gravel and while something is better than nothing none of these solutions are able to generate any upward pressure on the concrete so not much support is possible. Even worse is when homeowners pour concrete in those areas of erosion. Concrete is a very heavy material, in addition to being unable to generate any upward pressure on the slab the added burden on the soil often speeds settling.

1-855-752-2522 uses an expanding polymer foam injected under the concrete that fills voids and if necessary raises you’re settled concrete back to the proper grade. Available in several densities geo-polymer injection becomes a very economical and fast process with most jobs done in an hour or two.

Call today for no cost estimate to have your soil erosion and void fill problems dealt with quickly and efficiently.

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Superior technology, Superior polymers, Superior results.

 

Help! My concrete is sinking.

 

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HHHHHHEEEEEEEELLLLLLLLPPPPPPP! 

A frequent statement we hear when folks with sinking and settling concrete here we can help them.

Concrete settles because of poor soil conditions. Poor compaction, rotting organic material in the soil, erosion and saturation. 1-855-752-2522 has the products and the expertise to correct your settling concrete.

The vast majority of settling concrete can be corrected with our polyurethane injection Slabjacking and then addressing external problems such as erosion and soil saturation. Directing water well away from concrete by moving down-spouts, adjusting sprinklers to avoid standing water and caulking joints and cracks in concrete Will resolve the vast majority of settling concrete. So sure of this method are we, that we offer a full two-year warranty on our services. (See website www.SlabjackGeotechnical.com for restrictions) and five years if we caulk the joints!

Dealing with poor compaction and a breakdown of organic material create the same problem, settling concrete, but are at either ends of the time-line with regard to settling concrete. Poor compaction results in near immediate settling of the concrete and generally affects new construction, this settling can go on for as long as 10 years. The breakdown of organic material can happen over a period of years and even decades and is generally the result of buried material such as stumps, grasses, and construction debris. Even debris such as large chunks of concrete that have been buried can create huge sinkholes due to the voids often found around this debris that eventually is filled in with soils above it which were expected to support slabs on the surface.

Correcting settling that results from poor compaction and a breakdown of organic material often takes a two-pronged approach. First, stabilizing deeper layers of soil requires the use of soil conditioning agents injected into the ground which solidify the loose or organic material. Second, polyurethane Slabjacking to bring the concrete back to original grade is then utilized. The combination of soil stabilization and polyurethane slab jacking is the quickest and best long-term solution to correcting concrete settlement. Other methods such as mudjacking do not deal with the underlying problem of the soil nor does concrete replacement.

If you are dealing with sinking concrete call for a no obligation consultation today.

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1-855-752-2522

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Superior technology, Superior polymers, Superior results.

 

 

 

 

Slabjacking Methods and material options

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There are several different ways to raise settled concrete. Mudjacking, sand jacking, concrete pressure grouting and polyurethane Slabjacking.

A brief overview –

There are several recipes for mudjacking. Most companies using this method use a mix of native dirt mixed with a little bit of fly ash and a touch of Portland cement mixed with water. Portland cement of course creates a stiff material as it dries out and the fly ash helps the material flow through the hose without clogging. There are other recipes and the goal is to have a consistent product that flows through the pump hose without “dry packing” and doesn’t shrink too much as it dries.

Sandjacking can be done only when the slab can be pre-positioned with jacks at which point dry sand is blown under the slab to fill the void space. This method is time consuming and impossible for much of the settled concrete out there due to the inability to use jacks against walls and such.

Concrete pressure grouting is another method that is it occasionally attempted. The problem with this method is the incredible overburden on week soils concrete creates. At thirty three hundred pounds per square yard it doesn’t take much material to have the equivalent of a full-size pick up truck sitting under your concrete slab trying to hold it up. Concrete pressure grouting is a horrible way to raise concrete and generally results in additional resettling followed by having to rip it all out and replace it at a later date.

Polyurethane slab jacking is known by several names such as the Uretek method, polylevel, polylift, geo-polymer Slabjacking and more. What they all have in common is using an expanding polymer to raise concrete. Available in fairly light duty formulations all the way up to extremely heavy duty formulations for residential, commercial, trench break foam, slab curl stabilization polymers and soil stabilization materials. The primary advantage of using polyurethane is you eliminate the inconsistency of the Slabjack material. In addition the material flows better under the concrete slab, much smaller holes are needed to inject the material through the slab and it is a faster process which helps negate the higher material cost.

Several polymer manufacturers produce material. NCFI, HMI, SPI and others are leaders in the manufacture of slab lifting polymers. The polymers are categorized by weight per square-foot but “rise time” is a critical factor to determine suitability for residential or commercial lifting. Two different polymers both four pounds per square foot may have very different lifting characteristics with one moving large distances under the slab and the other aggressively lifting in a very limited area. One would be a good choice for a large freeway slab but completely wrong for a residential sidewalk. In addition the temperature of the material and the substrate play important roles in the technique used to raise the concrete slab.

Call the experts at 1-855-752-2522 today for an on-site estimate to have your settled concrete raised.

1-855-752-2522

www.SlabjackGeotechnical.com

 

 

 

 

 

What can be done about voids under concrete?

Voids under concrete eventually lead to cracking and/or settling concrete. Voids are created when concrete is partially supported by base soils or through the use of anchors or rebar to foundation walls or through the use of Sonotubes. As the soil settles or is carried away by other means a gap opens up between the soil and the bottom of the concrete slab resulting in a loss of support.

Un-compacted fill dirt, erosion, burrowing rodents, decaying organic material even a loss of moisture in the soil can create voids. Once there, voids are difficult to fill. Smaller slabs such as walks can be packed with gravel or sand to fill voids but this is not practical for larger slabs such as driveways or patios. These need a method that supports but doesn’t lift the slab. Using an expansive polymer is the ideal material for void filling for several reasons such as;

Polyurethane can travel several feet in every direction to fill voids, fissures and holes. It has the ability to consolidate organic material, sand and loose rock. If properly monitored Polymer injection can provide support without excessively lifting or stressing the slab which causes fractures.

A typical void fill application for a residential job would be under a front entry. These are often “pinned” to the foundation wall with rebar. Because fill dirt is often used around the foundation and again because gutters are often not installed on new construction or downspouts are mis-placed, the fill dirt becomes saturated with water this often results in some dramatic settling. If the entry was not pinned to the foundation it will begin to settle. If it was pinned to the foundation a void will open up under the entry. Given enough time, even the entry pinned to the foundation will settle because the rebar will either bend or in time rust and break.

The question with new construction is what should I do? Settling of soil in new construction can go on as long as 10 years so the question becomes do you live with it and replace your broken up concrete at some later time or do you try and preserve it knowing that you may have someone out 2, 3 or 4 times in the next decade to shore up what should’ve been taken care of during initial construction. Immediate replacement of settled concrete or concrete with voids is not a good choice as settling is not yet complete.

Geo-polymer void filling is the best method we currently have for void filling but it cannot affect deeper layers of un-compacted fill so you are left with supporting and densifying through polymer injection.

There are other materials namely soil stabilizers that can be used to solidify deeper layers of soil however due to their cost are impractical for residential work and are primarily used in municipal or commercial applications.

Dealing with voids whether they be stable or dynamic is an important part of maintaining your concrete slabs whether they be residential, commercial, industrial or municipal.

If you see a void opening up under your concrete slabs give the concrete raising and leveling professionals a call we will get you taken care of.

1-855-752-2522

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.

 

 

 

 

Slabjack Geotechnical is the best method aesthetically for raising concrete.

 

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Various hole sizes from raising concrete.
Various hole sizes from raising concrete.

One of the advantages with polymer Slabjacking is the very small holes needed to raise concrete. What the above picture show is two previous attempts to level this concrete with mudjacking before finally being stabilized with polyurethane injection Slabjacking, the top patch is with our method.

What isn’t shown is how many fewer holes our method uses, up to 300% fewer. Coupled with their much larger size, mudjacking just looks a lot worse than our method.

Call today for a no cost estimate,

1-855-752-2522

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.

 

 

Concrete garage floor settling

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When we built our home back in 2005-6  our builder, perhaps like yours, really didn’t do any kind of compaction. As a result we have had several issues to address, first the porch, then the sidewalk then the driveway and the latest is our garage floor. (And you thought you had it rough!)

The settling thus far has been limited to the left side corner nearest the garage door. This is the most common section we see settled when we do residential garage floors. I suppose because it is the side most often, but not always, driven on. Once even slight settling takes place, water in the form of ice and snow, carried into the garage by automobiles melts and migrates down between the slab and foundation wall and settling is then greatly exacerbated. Cracking soon follows and slab offset becomes noticeable as the slab pivots.

Garage floors are ridiculously expensive to replace so correcting the problem ASAP is highly recommended. We have seen estimates for interior concrete replacement as much as thirty dollars a square foot, but even at ten dollars a square, a small 20×20 garage costs four thousand dollars plus tax to replace!

For Slabjacking services you can expect to pay in the neighborhood of four hundred dollars for ,  simple settled corner to two thousand dollars or more for severe settling or extra-large garages.

With our garage floor all it took was four injection points and about thirty pounds of Geo-polymer to level our floor which also leveled the crack line, roughly a $400 job.

If you are noticing garage settling call the professionals today,

1-855-752-2522

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.

Slabjack Geotechnical – how much can you lift?

Occasionally we’re asked how heavy of a structure we can lift.

Geo-polymers Slabjacking has raised structures well over a quarter million pounds. It is actually quite surprising how much a concrete structure will weigh.

Entry porches are a good example of this and can be instructive of why they settle. A six-foot deep porch that goes across the front of the house twenty feet that also has two stairs and was not back filled will use 200 cubic feet of concrete, 7.4 cubic yards and will weigh in the neighborhood of  24,000lbs! Is it any wonder it compresses soils and settles?

Even a simply 10×10 patio poured a standard four inches thick will weigh 4074lbs, that’s about as heavy as a full size car!

For Municipal work, a concrete freeway slab poured 10″ thick and measuring 30×50 will be in the neighborhood of 150,000lbs, geo-polymer Slabjacking is now the preferred method of raising settled freeway slabs.

Even at ten inches thick, concrete weighs less than nine pounds per square inch (.8333 lb per SQ inch) our polymer supports 86 lbs per sq inch or over 12,000 per sq foot! Theoretically our Geo-Polymer could support 100″ or a concrete slab eight feet thick!

The material we use has gone through the rigorous D.O.T. approval process, we don’t use a cheap general purpose material on residential projects we use what we feel is the finest polymer on the market today, HMI’s RR401g.

Call today, let us raise your sunken and settled concrete,

1-855-752-2522

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.

 

 

 

 

Slabjack Geotechnical concrete leveling advantages

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You have choices when it comes to concrete repair, you can replace it and not just with new concrete, or you can use a competitor so why should you choose 1-855-752-2522?

1. Compared to new concrete or professionally installed pavers, concrete Slabjacking will be 1/4 to 1/2 as costly. A new 10×10 concrete slab is roughly $800 to $1000. Slabjacking? About $400

2. Method. Geo -polymer Slabjacking has proven to be a superior method verses “mudjacking” or concrete grouting. Lighter, quicker, less disruptive, able to under-seal cracks and much smaller holes all combine for a better repair method.

3. Experience. With thousands of slabs raised Slabjack Geotechnical is the most experienced Slabjack contractor in the markets we serve. We are students of the process and attend continuing education seminars to sharpen our skills and to stay current with the latest materials and methods.

4. Material. 1-855-752-2522 utilizes RR401g geo-polymer as our material of choice. This material is fully hydrophobic and twice as dense as many lifting polymers on the market today providing incredible load carrying capacity. In fact this polymer can support over 12,000 lbs per square foot!

5. We are committed to being the easiest Slabjack company to do business with. From initial contact to final billing our process has been streamlined for simplicity.  Hey, this isn’t brain surgery it shouldn’t be as complex.

Call today, let the concrete raising professionals take care of your concerns.

1-855-752-2522

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.