Alchemy-Spetec Blog

Polyurethane Concrete Leveling Case Studies

Posted by Kreg Thornley on Sep 20, 2022 10:00:00 AM

Banner - Concrete Leveling Case Studies

Body - Concrete Leveling - Case StudiesThe Concrete Leveling Process

Surface erosion, water damage, shrinking from heavy loads, or void spaces in the soil can all cause commercial, industrial, and residential slabs to sink or, in worst-case scenarios, collapse completely. Even without catastrophic collapse, slightly uneven concrete can cause expensive damage to property, vehicles, and factory equipment - not to mention personal injury.

Polyurethane concrete leveling is often the most cost-efficient and durable solution to this problem. A technician simply drills 3/8-inch holes through the concrete surface. Then, injects one of the Alchemy-Spetec concrete leveling polymers with the MixMaster Pro slab lifting gun. As the foam expands, pressure on the underside causes the concrete to lift to its original level position. The slab is ready for traffic 15 minutes after installation. The repair is waterproof and strong enough to support virtually any structure.

Concrete Leveling Case Studies

Want more information on polyurethane concrete leveling?

Download an Info-Packed Slab Lift Brochure!

Topics: All Posts, Lift Slabs

Polyurethane Concrete Repair Presentations for Engineers

Posted by David Park on Sep 15, 2022 10:00:00 AM

Banner - Polyurethane Concrete Repair Presentations for Engineers

Body - Polyurethane Concrete Repair Presentations for EngineerAlchemy-Spetec offers one-hour CE/PDH accredited presentations on polyurethane concrete repair. Presentation topics offered include Leak Seal, Geotech, and Seawall Repair. Here is a detailed overview... 

Leak Seal Presentation

The Specialty Waterproofing with Chemical Grouts presentation covers sealing leaks in structures with the use of polyurethane chemical grout injection materials and techniques. 

  • Chemical Grouting Primer
    • History
    • Safety
    • Characteristics
  • Utilization & Applications
    • Identifying Applications
    • Selecting a Chemical Grout
    • Epoxy & Hydraulic Cement
  • Installation Techniques
    • Crack and Joint Injection
    • Curtain Grouting
    • Oakum Soakum
    • Equipment Overview

Alchemy-Spetec's one-hour CE/PDH accredited Leak Seal presentation is perfect for engineers looking for information on innovative and proven leak seal repair methods for sealing leaks in structures, inflow/infiltration mitigation, and more.

Geotech Presentation

The Geotechnical Applications for Polyurethane presentation explains three types of concrete leveling and soil stabilization materials and applications. 

  • Single Component Polyurethane Grout Applications
  • Two-Component Polyurethane Grout Applications
  • Acrylic Grout Applications

Alchemy-Spetec's one-hour CE/PDH accredited Geotech presentation is perfect for engineers looking for information on innovative and proven geotechnical repair methods for lifting concrete, soil stabilization, excavation support, controlling erosion, and more. 

Seawall Repair Network Presentation

The Seawall Stabilization and Preservation through Permeation Presentation explains and demonstrates how Seawall Repair Network contractors use polyurethane injection resin and surface-applied preservation solutions to stabilize and preserve seawalls and bulkheads. (Seawall Repair Network is a division of Alchemy-Spetec.)

  • The Causes of Seawall Failure
  • Stabilizing a Seawall
  • Preserving a Seawall
  • Stabilization & Preservation Through Permeation

Alchemy-Spetec's one-hour CE/PDH accredited Seawall Repair Network presentation is ideal for engineers who are interested in designing superior seawall/bulkhead rehabilitation and preservation solutions. This type of environmentally friendly permanent soil stabilization and seawall preservation can be applied to all types of waterfront infrastructure.

Want info on scheduling a presentation?

Request a Concrete Repair Presentation

Topics: Repair Seawalls, All Posts, Lift Slabs, Seal Leaks, Business Tips, Engineer Resources

Reminder - Register for Fall Geotech Training

Posted by Kreg Thornley on Sep 8, 2022 10:00:00 AM

Banner - Reminder-Geotech Training Program Fall 2022

Alchemy-Spetec HQ in Tucker, GA

THIS EVENT HAS BEEN CANCELLED

Sign Up to Get Notified for Future Training Events

AS-Training-Program---Fall-2021$745 Registration Fee
$665 for each additional participant from
the same company.

Get ready for a thorough education in Slab Lifting, Soil Stabilization, the Alchemy-Spetec Deep Lift® process, equipment, and applications. You’ll get hands-on training from a technical staff with decades of on-the-job experience.

Tuesday, October 4th

  • Geotech Product Line Overview
  • Geotech Applications & Case Studies
  • MixMaster Pro Slab Lifting Gun
  • Slab Lift Rig Demonstration

Wednesday, October 5th

  • Pump Demos & Training
  • PolyShark® / Soil Stabilization
  • Deep Lift® 
  • Ground Penetrating Radar

Thursday, March 31st

  • PolyBadger® Mobile Slab Lifting System
  • Estimating Material for Jobs

THIS EVENT HAS BEEN CANCELLED

Sign Up to Get Notified for Future Training Events

Topics: Equipment & Accessories, All Posts, Lift Slabs, Stabilize Soil, Business Tips, Deep Lift, Fill Voids

Reminder - Fall Geotech Training: October 4th - 6th, 2022

Posted by Kreg Thornley on Aug 29, 2022 10:00:00 AM

Banner - Reminder 2 Fall Geotech Training

Alchemy-Spetec HQ in Tucker, GA

THIS EVENT HAS BEEN CANCELLED

Sign Up to Get Notified for Future Training Events

AS-Training-Program---Fall-2021$745 Registration Fee
$665 for each additional participant from
the same company.

Get ready for a thorough education in Slab Lifting, Soil Stabilization, the Alchemy-Spetec Deep Lift® process, equipment, and applications. You’ll get hands-on training from a technical staff with decades of on-the-job experience.

Tuesday, October 4th

  • Geotech Product Line Overview
  • Geotech Applications & Case Studies
  • MixMaster Pro Slab Lifting Gun
  • Slab Lift Rig Demonstration

Wednesday, October 5th

  • Pump Demos & Training
  • PolyShark® / Soil Stabilization
  • Deep Lift® 
  • Ground Penetrating Radar

Thursday, March 31st

  • PolyBadger® Mobile Slab Lifting System
  • Estimating Material for Jobs

THIS EVENT HAS BEEN CANCELLED

Sign Up to Get Notified for Future Training Events

Topics: Equipment & Accessories, All Posts, Lift Slabs, Stabilize Soil, Business Tips, Deep Lift, Fill Voids

Reminder - Geotech Training: October 4th - 6th, 2022

Posted by Kreg Thornley on Aug 25, 2022 10:00:00 AM

Banner - Reminder-Geotech Training Fall 2022

Alchemy-Spetec HQ in Tucker, GA

THIS EVENT HAS BEEN CANCELLED

Sign Up to Get Notified for Future Training Events

AS-Training-Program---Fall-2021$745 Registration Fee
$665 for each additional participant from
the same company.

Get ready for a thorough education in Slab Lifting, Soil Stabilization, the Alchemy-Spetec Deep Lift® process, equipment, and applications. You’ll get hands-on training from a technical staff with decades of on-the-job experience.

Tuesday, October 4th

  • Geotech Product Line Overview
  • Geotech Applications & Case Studies
  • MixMaster Pro Slab Lifting Gun
  • Slab Lift Rig Demonstration

Wednesday, October 5th

  • Pump Demos & Training
  • PolyShark® / Soil Stabilization
  • Deep Lift® 
  • Ground Penetrating Radar

Thursday, March 31st

  • PolyBadger® Mobile Slab Lifting System
  • Estimating Material for Jobs

THIS EVENT HAS BEEN CANCELLED

Sign Up to Get Notified for Future Training Events

Topics: Equipment & Accessories, All Posts, Lift Slabs, Stabilize Soil, Business Tips, Deep Lift, Fill Voids

Geotech Training: October 4th - 6th, 2022

Posted by Kreg Thornley on Aug 23, 2022 10:00:00 AM

Banner - Geotech Training Fall 2022

Alchemy-Spetec HQ in Tucker, GA

THIS EVENT HAS BEEN CANCELLED

Sign Up to Get Notified for Future Training Events

AS-Training-Program---Fall-2021$745 Registration Fee
$665 for each additional participant from
the same company.

Get ready for a thorough education in Slab Lifting, Soil Stabilization, the Alchemy-Spetec Deep Lift® process, equipment, and applications. You’ll get hands-on training from a technical staff with decades of on-the-job experience.

Tuesday, October 4th

  • Geotech Product Line Overview
  • Geotech Applications & Case Studies
  • MixMaster Pro Slab Lifting Gun
  • Slab Lift Rig Demonstration

Wednesday, October 5th

  • Pump Demos & Training
  • PolyShark® / Soil Stabilization
  • Deep Lift® 
  • Ground Penetrating Radar

Thursday, March 31st

  • PolyBadger® Mobile Slab Lifting System
  • Estimating Material for Jobs

THIS EVENT HAS BEEN CANCELLED

Sign Up to Get Notified for Future Training Events

Topics: Equipment & Accessories, All Posts, Lift Slabs, Stabilize Soil, Business Tips, Deep Lift, Fill Voids

Why Your Garage Floor Slab is Settling

Posted by Steve Taylor on Aug 11, 2022 10:49:00 AM

Banner - Why Your Garage Floor Slab is Settling

Body - Why Your Garage Floor Slab is SettlingSettling Garage Floor Slab – Causes

As with most slab settling issues, voids and poor soil compaction are at the root of the problem. This is certainly the case with sunken garage slabs. They are typically constructed by backfilling the area after the foundation is poured (or blocked) and pouring the concrete on top. Achieving proper and adequate compaction is often difficult and just not achieved in many cases. This, combined with time and freeze/thaw cycles creates voids under the garage slab. Concrete itself is heavy and can settle, but when we park vehicles on top of a garage slab that has voids under it? It is obviously a recipe for disaster!

Settling Garage Floor Slab – Solution

Alchemy-Spetec can refer you to a contractor for a thorough site evaluation. A qualified contractor takes the time to properly inspect the issue, which generally entails probing the slab to determine if there is indeed a void and/or unstable soil (and to what extent). Gathering this type of information is key to designing a proper repair plan and calculating the amount of polyurethane lifting material needed.

Depending on the conditions found during site evaluation, there are a couple of different techniques the contactor may use (and oftentimes both). If the soil under the garage slab is soft and unstable to a certain depth, they may opt for the Deep Lift® method. The expanding structural foam creates a squeeze effect in the loose soil, essentially forming added support footings under the slab. The other injection method, Slab Lifting, entails going through ⅜-inch holes drilled directly through the slab. The same structural foam described above is used. The expanding foam travels the path of least resistance, therefore, filling all void areas as well as compacting any loose soil. Once the soil is compact, the expansion of the foam creates the power to lift the slab. Our high-density polyurethane cures to 90% in fifteen minutes – which translates to the slab being traffic-ready by the time we are packing up our equipment.

Want more info on the Deep Lift® and Slab Lift methods?

Download an Info-Packed Deep Lift Brochure!

Download an Info-Packed Slab Lift Brochure!

 

Topics: All Posts, Lift Slabs, Deep Lift

Case Study - Repairing a Leaky Pipe & Sinkhole on a Residential Property

Posted by David Park on Aug 4, 2022 10:00:00 AM

Banner - Repairing a Leaky Pipe & Sinkhole

Body - Repairing a Leaky Pipe & Sinkhole

In the city limits of Atlanta, a couple was surprised to see a sinkhole forming in their home’s front yard. They became quite alarmed as within just a few weeks it swallowed their sidewalk and a decent portion of the property in front of the home. They notified the city. 

After the City of Atlanta quickly got involved, some investigation revealed an old brick storm sewer running approximately 25-30 feet under the front of the property. Across the country, there is lots of brick infrastructure that’s still in service and in some cases over 100 years old. These outdated structures suffer from infiltration of groundwater which often erodes soil, as well as causes subsidence above. In this case, cameras revealed that several bricks had become dislodged, creating a pathway for soil and groundwater to get in. The end result was a rapidly forming sinkhole.

The City of Atlanta was already consulting with Alchemy Spetec on some other projects, so they asked us to take a look. After reviewing the available information and making a site visit, it was determined that a multi-step plan would need to be undertaken to seal the pipe and reestablish soil compaction.

Powerful Polymers

The single-component polyurethane AP Fill 700 was selected for the sealing of the pipe and for the compaction grouting of the above soils. AP Lift 430 would be kept on standby in case further grouting was required to stabilize under the home foundation itself. As it turns out, this was indeed the case.

  • AP Fill 700 has an adjustable set time and is highly expansive. It works in wet environments, perfect for this project. It can permeate loose soils and gravel and achieve compressive strengths in excess of 1000 psi.
  • AP Lift 430 is fast and expands 24 times its original volume. It is strong and can support 7,000 lbs per square foot.
  • Both products are NSF ANSI 61 approved as safe for potable water contact. This certification provides reassurance that these products will not leach any chemicals out into the soil.

Painless Procedures

As previously mentioned, there were several steps that had to be undertaken to complete this project. First, the bricks that had become dislodged were reaffixed back into place. Once that breach was sealed, AP Fill 700 was injected through the pipe walls in multiple areas around the breach. AP Fill 700 reacts when it contacts moisture and there was no lack of that at 25 feet deep. Regardless, twin streaming through an F-Valve Assembly was implemented to ensure a good resin/water mix. This approach rapidly filled all of the voids surrounding the pipe and also sealed several other small areas of weeping water infiltration.

The second step was to fill the sinkhole with loose dirt and gravel and then permeate that with AP Fill 700 to squeeze the soil and lock all of the backfill together. Half-inch injection pipes were installed down to the top of the pipe, then soil and gravel were backfilled to the surface. Once the backfill was in place, AP Fill 700 was injected and the probes were slowly extracted to insure a uniform measure of polymer throughout the soil column. When this is done in a grid pattern, the result is a lot of increased compaction and bearing capacity.

Once the sinkhole was repaired, concern remained about loss of soil compaction under the foundation of the home. The steps leading up to the front porch had settled away from the home indicating further bad soil was likely the case.

Alchemy-Spetec is a dealer for Pagani, a dynamic cone penetrometer (DCP) manufacturer out of Italy. We brought our unit out to the property and did 6 penetrometer tests across the front of the home next to the foundation. Four of the six tests revealed weight of hammer (WOH) readings which basically means zero compaction. The soil could not even support the weight of our machine. The city was on site to see the tests and immediately approved the compaction grouting beneath the front foundation. This is where the AP Lift 430 came into play.

Half-inch injection probes were installed across the entire front of the home next to the foundation. Probes were installed down to 8 feet which is where the soil became much stronger. AP Lift 430 was injected while the crew slowly extracted the probes - until lift was observed on the home. When lift was detected, the grouting ceased. This process was repeated across the entire front of the home on 4-foot spacing.

After the compaction under the footing was reestablished, the front steps that had settled away from the house were lifted back into place using AP Fill 430.

Rapid Results

The job was completed quickly without any excavation and dewatering. No curbs, road base, or utilities had to be removed or relocated. This approach saved enormous amounts of additional cost and delays.

Want more information on leak seal and geotech products?

Download the Info-Packed Leak Seal Product Catalog!

Download the Info-Packed Geotech Product Catalog!

Topics: All Posts, Lift Slabs, Seal Leaks, Stabilize Soil

Limited Time Offer on the New MixMaster Pro

Posted by Kreg Thornley on Jul 12, 2022 10:00:00 AM

Body - Limited Time Offer on the New MixMaster ProSave Time, Hassle, and Money!

Spray foam insulation guns are made for the process of spraying foam at constant pressures. Slab lifting requires a gun that is designed to deal with changing pressures and backpressure without backing up or crossing over.

  • Get the new MixMaster Pro Version 7.0 for $2,450 (that's a savings of $355).
  • Get an "I Am a MixMaster!" T-shirt (while supplies last).
  • Mention the "I Am a MixMaster" promo for the discount and the T-shirt. Offer expires August 31st, 2022. Act now!

Contact your regional manager or call 404-618-0438 to place an order. (Be sure to mention your T-shirt size.)
Find your regional manager here.

MixMaster Pro 7.0 Features

  • New CNC machined handle.
  • Custom machined nipples.
  • Less threaded connections.

MixMaster Pro 7.0 Benefits

  • End-of-day cleaning time cut in half.
  • The handle is built to last through the toughest of jobs.
  • The nipples can be removed easily.
  • Less threaded connections = fewer leak possibilities.

Want more info about the MixMaster Pro?

Download an Info-Packed MixMaster Pro Brochure!

Topics: Equipment & Accessories, All Posts, Lift Slabs

Debunking Myths About Lifting Slabs With Foam

Posted by David Park on Jun 23, 2022 10:00:00 AM

Banner - Debunking Myths About Lifting Slabs with Foam

Body - Debunking Myths About Lifting Slabs with FoamWhen parts of a concrete surface sink due to erosion and poor compaction, the resulting trip hazard can be dangerous. If left unrepaired, liability and safety issues linger. Although concrete is tough and durable, unstable soil can cause it to crack and sink. Fortunately, a reliable solution for lifting concrete has been developed and proven over the past few decades. High-strength expansive polyurethane foam is injected underneath the slab to bring it back to level. This method has been used in a wide variety of commercial and residential applications with long-lasting results.

Despite consistently reliable results, some myths about polyurethane slab lifting have cropped up over the years.

Myth #1: Polyurethane Foam is a Temporary Fix

People who assume that polyurethane slab lifting is a temporary fix typically have a general lack of knowledge, understanding, and experience with the process. Common misperceptions supporting this myth include:

  • The incorrect assumption that foam will be susceptible to moisture and degrade under the concrete.
  • The incorrect assumption that the process typically leaves large voids underneath the slab, leading to resettlement.

Water does not cause lifting foams to degrade underneath the slab. In addition, a factory-trained contractor will not leave gaps underneath the slab that would lead to resettlement.

Myth #2: Polyurethane Foam Cannot Support Heavy Loads

Another common misconception is that polyurethane foam is weak and does not have the load-bearing capacity to support slabs with heavy traffic or large structures.

Common misperceptions supporting this myth include:

  • The incorrect assumption that lifting foam is the same stuff used by the insulation guys.
  • The incorrect assumption that because it expands easily, it must collapse easily.
  • The incorrect assumption that the expansion rate is uncontrollable and leads to unpredictable results.

All lifting and stabilization polyurethane foams formulated and manufactured by Alchemy-Spetec are designed specifically for Geotechnical applications. Once cured, Alchemy-Spetec lifting foams are incredibly strong and durable. Easy expansion does not equal easy collapse. Factory-trained contractors can control the final lift level of a slab to within 1/8th of an inch.

Myth #3: Polyurethane Foam is too Expensive

When faced with the dilemma of a sunken slab, you have three options aside from polyurethane slab lifting:

  1. Doing Nothing: If you do nothing, the problem will grow. The longer you wait, the more expensive the repair.
  2. Replacing the Slab: This process will take several days, is often messy, and is typically more expensive than lifting with polyurethane.
  3. Lifting with Cement Grout: This procedure (known as “mudjacking”) requires heavy equipment, large drill holes, and the use of weighty cement grout which often sinks over time. When the cement grout sinks over time, you have to get it lifted again. Eventually, even this process becomes more expensive.

Want more information about polyurethane slab lifting?

Download an Info-Packed Slab Lift Brochure!

Topics: All Posts, Lift Slabs