Case study – Concrete slab curl

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Slab curl is something that can happen along control joints and edges as they cure. The differential in humidity and temperature causes slabs to curl up or down but generally up as the soil keeps the underside cooler and wetter.

In residential concrete this isn’t as big of a concern but in warehouses where fork lifts operate or there are very heavy loads coming and going it is a real problem.

For the fork lift driver without shocks it’s a big bump that can damage delicate cargo such as fruit as well as causing discomfort for the driver.

With semi truck traffic the problem is even worse. As the trucks drive over the “curl” it is pushed down into the void which deepens the void and then a foot or two back from the curl a crack eventually develops due to this flexing of the slab.  Eventually the slab needs to be replaced unless a repair method is used.

1-855-752-2522 repairs slab curl. A combination of polymer injection to stabilize the joint and concrete grinding to remove the excess “curl” eliminates fork-lift bouncing and completely stabilizes the slab. In some cases only joint stabilization is required, for example where forklift traffic is not an issue but large tractor/trailers are.

We typically use our DOT approved RR401g polymer but specialty slab curl polymers can be ordered if the job is large enough. These specialty polymers are not as expansive and will travel thirty feet or more along the joint meaning less injection holes to patch.

We recently completed a job for Bluebird Packers in Peshastin Wa. That had both slab curl and a section of settling abutting the curl.

After leveling the slab, injections points were laid out in a “stitch” pattern on either side of the control joint. After carefully stabilizing the joint, grinding was completed to totally flatten the transition between slabs leaving a smooth, even surface to drive on.

Geo-polymer slab stabilization is faster than replacement, provides for little or no down time, is permanent and extremely affordable when compared to replacement.

If you are dealing with the effect of slab curl call today for a no cost estimate for repair,

1-855-752-2522

www.SlabjackGeotechnical.com

 

 

 

Case study- Raising a settled concrete warehouse Floor

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Leveling a settled concrete warehouse floor.

We saved Bluebird packers a truckload of money on a job we did for them this last year.

One of their C/A storage rooms had a section that had settled, after pulling level lines across the floor  we found about two and a half inches of total settlement.

Because of the settling they were unable to stack bins to the standard height due to tipping.

They called the professionals, 1-855-752-2522.

We set up a grid pattern for the injection points and gently lifted the settled area back into alignment.

Surgical precision. Voids completely filled without creating over-lift.  Zero down time.

If you manage a facility call the professionals,

1-855-752-2522

wwwSlabjackgeotechnical.com

Superior technology, Superior polymers, Superior results.

Deal with water to avoid settled concrete slabs.

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Poor compaction coupled with excess water causes virtually all the settled concrete we see.

Recently the drastic effect of excess water was demonstrated on a home where compaction was not an issue.

We got a call from a homeowner that their fifty year old home was experiencing some settling on a porch and some attached brickwork. I asked, “the house is fifty years old and the settling just happened?”

She replied yes but they had recently installed gutters and downspouts and she suspected that might be the cause.

Ya think?

A site visit showed that she was correct, the downspouts was dumping runoff right at the point of settling. An estimate was provided and the work was completed using Geo-polymer Slabjacking as well as sub grade concrete and steel bracing for the decorative brickwork.

This is so common.  Here’s how to prevent the problem;

New construction – install gutters and downspouts before concrete is poured, insuring water is directed well away from porches, walks, driveways and foundations. Where municipal codes allow, tie into storm drains, if not, dig French drains or use other methods to avoid saturating soils near concrete slabs.  Other concerns are landscape plantings too near foundations and slabs, tree roots, ponds and sprinkler systems.

Existing homes – design the gutter system with the intent to have water going somewhere other than near concrete slabs and structures. This may necessitate tunneling under walks with a drain pipe directing water well away from the home. If this is impossible a French drain can be dug, rain barrels used  or use the retracting downspout extensions that unroll to direct water away from structures when there is run off.

Take the time before settling occurs to correct deficiencies and you will avoid the problems associated with sinking concrete.

Slabjack warranties generally require the correction of the problem that created the original settling. In the vast majority of cases it means making corrections to your drainage system, eliminating plantings that require substantial water, reducing sprinklers or using drip lines instead.

Slabjack Geotechnical is a great resource when it comes to diagnosing the cause of settling and recommending corrective measures to prevent further settling. Call today,

1-855-752-2522

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.

 

 

 

Raising settled concrete porches

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Concrete porch settling?

Settled concrete porches are a fairly common thing to see but not as easy to properly repair.

A simple concrete porch may weigh many tons, have unseen sub grade supports, may be the base for both decorative pillars and structural support for overhead eves and more.  Because of this it is important to hire someone who has experience with many different projects and an understanding of concrete porch construction methods.

1-855-752-2522 has raised many porches from simple slabs to multi step with both decorative and load bearing pillars. Each must be understood in order to be properly lifted and supported.

Some things to consider when raising a concrete slab;

Weight – is the porch solid or back filled? We have lifted porches thirty inches thick! Weight helps determine number and location of injection points, potential material blow out, estimated material needed and more.

Direction of settling – this reveals whether the porch was pinned to the foundation and where potential voids may be and how extensive they are.

Decorative and structural members resting on the porch – determines injection points and other strategies to consider in order to preserve the structure.

Sub grade support system (Sonotubes) – determines how/if the porch can be raised or if other methods would be better suited.

Dimensions – A wide porch that is not deep is much more difficult to level than a square porch or a porch that is narrow but deep. It all boils down to leverage, the greater the leverage the easier to generate lift, the less time it takes and the less material needed.

When you contact 1-855-752-2522 you can rest assured we have the experience necessary to diagnose and correct whatever settled concrete issue you are dealing with whether it be a driveway a walkway or a porch as discussed above.

Call the concrete raising and leveling professionals today,

1-855-752-2522

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.

 

Mudjacking Basics

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Slabjacking, foam jacking, mudjacking, Polylevel ™ sand jacking, what’s in a name?

Mudjacking is a process that hydraulically raises concrete slabs.  Until fairly recently, it was the only method available other than replacement.

Holes ranging in size from one inch to two and a half inches in diameter are drilled and a grout pump with an attached hose is used to pump a mud slurry under the slab floating it back to grade. Because it is less costly than replacement many accept its inherent problems namely;

– The big ugly holes are hard to conceal.

– The material, primarily dirt is often inconsistent.

– The process is fairly messy, (it is mud after all) and requires a hose for clean up.

– The added weight of the material can further exacerbate settling by overburdening weak soils.

–  The material does not flow well causing “pyramiding” under the slab.

Because of these and other limitations mew materials were needed and the technology to advance to allow the new materials to be utilized in the concrete raising industry. There has been some pushback by the Mudjacking lobby, but by and large Geo-polymer Slabjacking is gradually taking over the field and for good reason.

Many of the objectionable issues with Mudjacking are eliminated or greatly reduced with Geo-polymer Slabjacking. The holes are much smaller, 5/8″ and fewer are needed. Cleanup is with a broom. The material is very consistent. The material flows extremely well. The material can be used for numerous other problems such as void filling, stoping water leaks, under sealing cracks and more.

After investigating both methods throughly in 2010, 1-855-752-2522 chose the Geo-polymer method. The equipment was more expensive, the material is more expensive and the training needed is more demanding. So why spend more money and time training? Simply put the processes advantages sell them-self to our clients.

If you are concerned about the final appearance, Geo-polymer Slabjacking is superior to Mudjacking. In fact on every problem noted above with Mudjacking, Geo-polymer Slabjacking has the advantage.

There is only one area where Mudjacking still has an advantage, cost of material. Much of this advantage disappears due to the technology of polymer Slabjacking which results in being able to do twice as many jobs in a day as Mudjacking.

In the markets we serve you will find 1-855-752-2522 to be extremely price competitive. We recently did a job for one of the small municipalities in Eastern Washington. We bid the job as well as another Mudjacker in the area. 1-855-752-2522 won the contract and completed the work as outlined.

With all the advantages 1-855-752-2522 offers with our state of the art Geo-polymer Slabjacking why choose yesterday’s inferior method? Call today for a no cost no pressure estimate,

1-855-752-2522

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.

 

How long will my concrete raising job take?

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Raising that sinking and settling concrete –

Occasionally a client will want to know how long their job will take to complete.

An average job takes us about two hours, but varies so widely, even among similar looking jobs that it is hard to guarantee or plan your day around.

A one hundred square foot sidewalk, 4×25, settled end to end will be much easier to level than the same walk settled on edge.  The one settled on the end will need two injection points where the one settled on its side will need as many as five. In addition, those five injection points may need to be re-injected multiple times in order to keep the material confined to the correct side of the slab.

Other challenges can create even more uncertainty, slabs binding necessitates the sawing of joints, a sometimes time-consuming process. Extra thick slabs use more material and thus a greater amount of time necessary to pump the material.  A colder outside temperature means it takes longer for the polymer to be heated to the proper temperature, something necessary for optimum polymer expansion.

With most exterior work we do not schedule a time for the work to be done because of the wide variance in how long each job takes. If you need to be on site when the job is done we typically schedule your job the first job of the day that way you are not waiting for hours while we are dealing with something that held us up an extra two or three hours. Of course all interior work has to be scheduled, since most of our work is exterior this is much less of a problem to accommodate.

While the vast majority of estimates, 95%  or so, are generated strictly by the estimating software, there are a few estimates where we have to override the software because of extraordinary conditions or situations or contractual obligations. These kind of conditions always take more time but not necessarily more material, the way the estimating software is designed. Things such as;

– The need to tilt a slab into position with a jack prior to supporting with polymer.

– A requirement to pay “prevailing wage” and additional reporting requirements on municipal jobs.

– Slabs that require the same injection points to be re-injected multiple times.

– Voids. We make an attempt to estimate voids when they might be extensive to avoid excessive material surcharges, filling void space takes time prior to any lift being possible.

In conclusion, Slabjacking is like much of repair work in general, you never know what you will run across that throws a wrench into your best laid plans.

Call today, we will get you taken care of,

1-855-752-2522

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.

Raising your sinking and settled concrete in Richland, Kennewick and Pasco.

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Slabjack Geotechnical is the most experienced Slabjack contractor in Tri-Cities using the Geo-Polymer injection method. Call toll-free for a no cost no pressure estimate to have your settled concrete raised today.

1-855-752-2522

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.

Settled concrete raising in Coeur D’ Alene

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Slabjack Geotechnical is the most experienced Slabjack contractor in the Coeur d A’lene area.

Raising settled concrete porches, patios, pool decks, garage and basement floors, driveways, warehouse floors, sidewalks and more. Call today for a no cost, no pressure estimate,

1-855-752-2522

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.

Voids

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Space under your concrete? We can help.

One of the challenges in estimating accurately are the presence of voids under concrete, here is what you need to know;

– Voids are nearly always present where slabs meet vertical walls, such as a porch against the foundation.

– Voids are nearly always present behind pool walls.

– Voids are generally caused from a combination of loose soils and water, but can also develop because of deteriorating organic matter such as roots or a fluctuating water table where soils are alternately saturated then dried out.

– Voids are often the result of poor site preparation. Proper slope of the top soil generates runoff away from the structure, not towards it. French drains, gutters, landscaping and sprinklers all play a role whether you will be dealing with settling and voids.

– While not generally caused by “critters” once voids exist rodents and larger animals take up residence often expanding the living quarters.

When you see settling or suspect voids call the professionals, we can help.

1-855-752-2522

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.

 

Case study – Slabjack Geotechnical for settled concrete stairs

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Settled concrete stairs
Settled concrete stairs

If you are wondering what to do about a settled concrete staircase we can generally take care of it for you.

Stairs do present some challenges; weight, small footprint and construction.

In the photo above we have a solid stair case settled straight down because of a porch on one side and rebar holding the walk to the stair case on the other.

Weight – A small set of steps like the one above 4×3 and an average of 18″ thick will weigh about 2500lbs! That’s the same as a small car!

Footprint – our polymer is incredible, capable of raising and supporting huge loads. It it does however, need room to work. The smaller the footprint the greater the possibility the material blows out the side reducing lift.

Construction and how it settled –  Hollow? Solid? Direction of settlement? Perhaps the biggest problem with stairs is how they look on the underside, they are sloped. This causes lift to be out as well as up. In nearly every case, raising a set of stairs will open up a gap behind the stairs. If/when this happens the gap can be filled with either caulking or concrete.

If you are living with a settled set of stairs call the most experienced Slabjack contractor today, 1-855-752-2522.

1-855-752-2522

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.