EagleLIFT Receives Commendation for Work Performed at the Port of Los Angeles

Ontario, CA – During the past month, our crews have been working at the Port of Los Angeles to perform underground void-filling and soil stabilization/compaction along a seawall using our proprietary polyurethane grout injection process. Yesterday, we were honored to receive a ‘Letter of Recommendation’ for the successfully completed project.

The letter, written by Shaun Shahrestani the Port’s Chief Harbor Engineer – Construction Division, stated:

“The EagleLIFT staff is professional, organized, and very pleasant to work with. Most importantly, Mr. (Cliff) Frazao is always willing to address the Port’s needs, has a deep knowledge and understanding of the material and engineering principles, and works cooperatively to solve potential concerns well before they could become problems.”

The project consisted of stabilizing 1300 Linear Feet of an old wood timber seawall. The seawall was experiencing deteriorating soil conditions caused by soil undermining beneath and through the seawall from decades of tidal shifts and subsequent soil movement. The subsiding soils were causing voids to form around the seawall and underneath the pavements they were supporting, leading to sinkholes and settlement of the overhead structures.

EagleLIFT worked with the Port and its engineers to implement its polymer injection process to stabilize the deteriorating soils, underseal the seawall, and return the load-bearing capacity back to the soil to mitigate future settlement. The below graphic displays the process:

The initial designs for the repair was the utilization of a compaction grout to voidfill, seal and stabilize the soils around the wall. The Port was experiencing a significant issue with the compaction grout design due to environmental concerns and its effectiveness around the existing utilities.  The compaction grout design required that a capture plan be implemented to ensure the grout would permeate into the surrounding environment.  With EagleLIFT’s polymers, there were no environmental concerns due to the controllable expansion and their environmentally inert nature.

Regarding access, the compaction grout had some access issues due to the existing utilities. In order to gain an effective enough permeation, the grout had to be injected using a 45-degree angle that avoided the utilities, but had limited ability to reach the voids and stabilize the soils. The holes required for compaction grouting were also large, and potentially damaging to the asphalt slabs. With EagleLIFT, our holes were ½” in size and the injections could be made around the utilities, ensuring optimal spread of the chemical grout.

Mr. Shahrestani’s letter continues:

“Mr. (John) Silva [EagleLIFT’s Project Superintendent] worked closely with the tenant to accommodate the tenant ship schedule and minimize disruptions to their operations. They performed the job under budget and met the aggressive completion schedule, while maintaining compliance with safety and environmental requirements.”

“I take pleasure in recognizing EagleLIFT, Mr. Frazao, Mr. Silva, and the crew for their excellent performance on the project. I highly recommend them for their competence, cooperation, professionalism, and outstanding level of performance in delivering this project at the Port of Los Angeles.”

About EagleLIFT, Inc.

EagleLIFT is a foundation repair and soil rehabilitation company based in Ontario, CA.  It specializes in foundation piering and polyurethane injection applications for seawall repair, foundation repair, soil compaction, subsurface barrier walls, and roadway and pavement lifting. EagleLIFT is a Class “A” General Engineering Contractor and holds SB, SBE and DVBE certifications and services Arizona, California and Nevada.

EagleLIFT Inc, announces its Proprietary “EL” Polymers in Collaboration with NCFI Polyurethanes

Ontario, CA – EagleLIFT Inc., a foundation repair and soil rehabilitation contractor based in Ontario, CA, announced the release of its proprietary “EL” polymers that it says will change the industry.

With over 20 years of operational and design expertise, EagleLIFT has helped innovate the use of two-part chemical grout as a soil compaction and foundation lifting solution.  EagleLIFT’s proprietary injection designs have evolved the industry by providing new techniques for achieving soil bearing capacity improvements.

“We have seen and used multitudes of different polyurethane formulations throughout our 20-year history,” states Don Moody, founder and President of EagleLIFT. “Working with NCFI, we have taken our tried-and-true application experience and designed polymer products which meet specialized application specifications.”

EagleLIFT’s EL polymers are designed to meet specific application needs, from soil stabilization and densification to advanced hydro-insensitivity to liquefaction mitigation. The polymers are at their core a two-part, closed-celled structural polyurethane. The polyurethane expands up to 25 times its initial volume through an exothermic reaction that happens when its plural components combine and release carbon dioxide. The polymer initially mixes with the soil layer, creating a matrix of soil and polymer that is highly dense with increased load-bearing capacity.  With different formula variations, mixing techniques, and injection designs, the polymers can achieve a broad range of applications.

“The fact is, each project and application is different, and while some polymers are more for utility, some polymers are designed to achieve specific needs, such as road lifting, seawall stabilization, or foundation lifting,” states Derek Berthelot, Vice President of Business Development. “Our polymer formulations were designed and tested around our application knowledge and experience, ensuring we have customized industry leading products that more effectively achieve our customers’ goals.”

About EagleLIFT, Inc.

EagleLIFT is a foundation repair and soil rehabilitation company based in Ontario, CA.  It specializes in foundation piering and polyurethane injection applications for seawall repair, foundation repair, soil compaction, subsurface barrier walls, and roadway and pavement lifting. EagleLIFT is a Class “A” General Engineering Contractor and holds SB, SBE and DVBE certifications and services Arizona, California and Nevada.

New Video! 45,000 sqft Warehouse Foundation Lift

EagleLIFT completes an incredible project in Brisbane, CA, where we lift a 45,000 sqft warehouse 15 inches from exterior to interior. The project is completed using a combination of Push Piers and Polyurethane Grout.

Derek Berthelot is promoted to EagleLIFT’s Vice President of Sales

Derek Berthelot is promoted to EagleLIFT’s Vice President of Sales

Ontario, CA – EagleLIFT, Inc., a Chemical Grout and Piering contractor based in Ontario, CA, announced today that Derek Berthelot has been promoted to Vice President of Sales. In his new role, Derek will be in charge of developing and executing sales strategies and growth goals in coordination with the financial and operational teams within EagleLIFT. Derek will report directly to EagleLIFT’s Founder and President, Donald Moody.

Derek has an extensive background in foundation repair, shoring and grouting methods, having worked in the industry for south Louisiana based shoring firm, National Foundation Repair, from 2006 – 2015 in both sales and operations capacities. In 2015, Derek joined the EagleLIFT team in its project management team. In 2016 he became Sales Manager and is now the Vice President of Sales.

“Under Derek’s leadership and his work with the executive team, EagleLIFT has experienced continued growth and has exceeded its sales goals,” states Donald Moody, President and Founder of EagleLIFT.

EagleLIFT has approximately 20 years of operational experience in foundation piering and soil stabilization using a two-part chemical grout. EagleLIFT is a Class “A” General Engineering Contractor, and a Veteran Owned Small Business.

“With EagleLIFT’s expertise and on-the-job experience, our growth possibility has no ceiling,” stated Mr. Berthelot. “I appreciate EagleLIFT’s continued faith in me and I am looking forward to helping educate our customers more about the benefits that we can offer them.”

With its chemical grout applications, EagleLIFT provides cost-effective solutions for increasing the weight-bearing capacity of soil, void filling, foundation lifting, sewer joint sealing, inflow and infiltration mitigation, seawall repair and a variety of other structural applications.

Culvert Soil Stabilization

EagleLIFT Completes Culvert Soil Stabilization Repair at Vandenberg AFB, Saving $1.5B Mission

EagleLIFT Completes Culvert Soil Stabilization Repair at Vandenberg AFB, Saving $1.5B Mission

Culvert Soil StabilizationIn the construction industry, deadlines are a way of life. Whether you are meeting proposal deadlines, managing costs, minimizing weather delays, meeting contract requirements, etc., the clock seems to always be ticking and pressure is continually mounting. However, recently EagleLIFT performed a culvert soil stabilization and slope repair project at Vandenberg AFB that, if not met, the deadlines would be a costly scenario.

Vandenberg AFB is a Department of Defense space and missile testing base located near Lompoc, California. Vandenberg launches a variety of critical rocket missions for military purposes and also leases launchpad facilities to SpaceX. As you can imagine, its activities are high-profile, high-budget, and highly sensitive to delays.

During the 2016-2017 rainy season, Vandenberg experienced extensive storm runoff that damaged an 84 inch, 200ft long corrugated metal drainage culvert, causing collapse at three separate locations and further degraded the culvert’s corroded bottom. The damage to the culvert caused severe inflow and infiltration (I/I) which destabilized an adjacent slope along the main supply road leading to Space Launch Complex 6 (SLC-6).

When an approximate 30ft deep sinkhole opened up by the supply road, a bypass road had to be installed in order to continue launch operations until a permanent fix was designed for the culvert. When concern began to grow that a 20ft high section of the adjacent slope would slip and the sinkhole wound endanger the new bypass road and delay an upcoming $1.5 billion mission, Vandenberg sought for a temporary fix to strengthen the culvert, slope and avert disastrous and costly delays.

When Vandenberg began designing a repair, the solution was to address 1.) culvert soil stabilization and restoring usable capacity, 2.) ensuring the slope would not slip, and 3.) not impact the environmentally sensitive habitat on the slope.

For the culvert soil stabilization, the AFB determined that chemical grout would be used to stabilize collapsed sections from degrading further into the culvert. The entire culvert was to be stabilized to prevent further soil migration and seal it against further I/I, and the corroded bottom of the CMP would be restored using a flowable fill.

For the slope, a “wedge” injection pattern was designed to provide structural stability at the bottom of the slope and lateral stability to prevent slippage that would cause structural damage to the culvert and irreparable damage to the sensitive environment the slope supports.

“Initially, Vandenberg’s solution for the slope repair consisted of using a compaction grout to provide a dense material for slope stability,” stated Cliff Frazao, Chief Operations Officer of EagleLIFT. “When we were approached for the project we had concern that the compaction grouting footprint could be detrimental to the environmental mission of the project and add too much weight to the area and cause further issues with the culvert.”

Based on these concerns, the slope “wedge” injections were rescoped to utilize a specialized formula of chemical grout that was hydroinsensitive, light-weight and highly expansive. The material’s initial permeation and structural capacity gave Vandenberg confidence in this alternative.

To meet the environmental compliance needs of the project, extensive preparations were necessary to minimize potential delays and protect endangered species that called this site their home. Some of the species included California Buckwheat, El Segundo Blue Butterflies, Tar Plants and the Red-Legged Frogs. To ensure the endangered plant/wild life habitat wasn’t inadvertently violated, environmentalists were onsite to pre-mark the plant life and be on the lookout for wildlife. If any of these species were disturbed or damaged, the project could have seen an immediate shutdown.

In regards to the culvert, EagleLIFT stabilized its entire 200 ft length. At the crushed joints, a 2ft injection of chemical grout created a thick arch of material and densified aggregate. The arch was designed to provide a convex, dense structural layer that would help provide structural stability and reinforcement to the crushed CMP. This would help mitigate further damage from occurring and re-establish limited drainage capacity.

The remaining portions of the culvert were stabilized using a consistent gridded injection pattern. The goal here was to fill any annular voids and restore the bearing capacity of the adjacent support soils.

“This was a high-profile project with an approximate $1.5B mission and national security at stake,” stated Carlos Castillejo, Project Manager for EXBON, the General Contractor for the project. “All eyes were on the EXBON-EagleLIFT Team to complete the project successfully and without delay, something we did with absolute success!”

The terms of the project were to complete the project in a 30-day window, spanning from September 14 – October 14, 2017. The project was completed in 8 days with no delays or adverse environmental impacts.

“We would like to thank both Vandenberg and EXBON for their confidence in EagleLIFT, and we were glad to be a small part of ensuring the missions of our military are executed with the utmost quality and efficiency,” says Donald J. Moody, President and Owner of EagleLIFT. “As a retired USAF Colonel, I take great pride to ensure that EagleLIFT’s operations are top notch especially for our military clients.”

About EagleLIFT
EagleLIFT has offices in Ontario, CA, Concord, CA, Las Vegas, NV and Rialto, CA. EagleLIFT is a Class “A” General Engineering Contractor and holds SB, SBE and DVBE certifications and services Arizona, California and Nevada.

The Rainy Season is Here, Are Your Flood Control Structures Ready?

The challenge for managers of water control structures is determining what kind of maintenance needs to be done to prepare for the rainy season. Over our 20-year history, we have evolved the use of chemical grout in flood control structure rehabilitation and seepage barrier repair, reducing manager’s costs and construction timelines.  So, what are some applications that chemical grout can be utilized to help you prepare for this rainy season?
What is Chemical Grout?
Chemical grout is a two part highly expansive polymer that is used to void fill and stabilize soils. Due to its highly expansive nature, hydro insensitivity, and strength, chemical grout is highly effective for stabilizing water control structures and protecting them against water seepage and erosion.
Void Filling and Soil Stabilization
Once injected chemical grout expands up to 20 times its initial volume. When the grout enters the treatment zone it is initially in liquid form. Like water, it saturates the area finding the path of least resistance. Once expansion begins, the material begins to permeate the soil, filling any annular voids throughout the soil and below the structure. Depending on the project goals, this process can be used to fill voids, soil stabilization, and restore or increasing the bearing capacity of base foundation soils. If there is any present water, the polymer will displace it and push it away.  Due to the chemical grout’s hydro-insensitivity and its binding of soils, the process will mitigate future washout and erosion.
Seepage Barrier RepairInjectable Seepage Barrier
Another innovative method for utilizing chemical grout has been that of an injectable seepage barrier wall. An injectable seepage barrier is created by injecting a dense, non-permeable layer of chemical grout where water migration is an issue. The injectable seepage barrier is also an  excellent complement to sheet pile walls for sealing it against leakage. Additionally, our polymers are NSF-61 Certified and are environmentally inert, so there are no concerns regarding long-term environmental impact
Applications Where Chemical Grout is of Use
There are many applications where Chemical Grout is of great use.  Here are some examples:
  • Void-filling underneath Spillways, Approach Slabs, Manholes and Buildings
  • Soil Stabilization and Densification
  • Lateral Line Sealing
  • Injectable Seepage Barriers
  • Slab lifting and Realignment
  • Seepage Barrier Repair
Why Chemical Grout?
Chemical Grout is fast, efficient, light-weight and cost-effective.
  • Fast – Chemical Grout sets up to 95% within 15 minutes after injection.  The results are immediate and the facilities operations are virtually unaffected.
  • Efficient – Moisture content isn’t an issue for chemical grout. Because of this, no matter the soil conditions, chemical grout can be used.  Additionally, EagleLIFT has over 20 years of experience in directing its injection patterns to ensure the project goals are a success.
  • Light-Weight – Due to the exothermic reaction and close-celled nature of EagleLIFT’s polymers, the polymer is light-weight and strong. The polymer is 200-400% lighter than cementitious and permeation grouts
  • Cost-effective – because it takes less of our material, less time and low project footprint, using our polymers is significantly more cost-effective than the competition.
  • Safe – Our products are NSF-61 certified, to make sure we have no impact on environmentally-sensitive areas or drinking water supplies.

We need your help finding the right people!

We Need Your Help!

Please forward this to anyone you think may be interested in working for a growing company who treat their employees right.

CREW MEMBERS
Do you have concrete or construction experience? We are looking for a hands-on production crew member to be responsible for completion of slab lifting and foundation repair work. Our crews work hard and get rewarded with competitive pay and benefits. Travel is required as we service all of CA/AZ/NV.

SALES REPRESENTATIVE
We are offering an exciting career opportunity to an energetic, motivated self-starter to join our sales team. We have WARM leads from potential clients contacting US looking for estimates. We need you to assist in developing our growing markets in Southern CA for our unique and exciting technology.
Come work for the leader in slab lifting and foundation repair. We hire the best because we are the best at what we do. Construction experience desired. Upward advancement readily available!

Apply Here

EagleLIFT has a New Headquarters and Operations Center

Ontario, CA – EagleLIFT, Inc, the premier foundation repair and soil stabilization company for California, Nevada and Arizona, has purchased a spacious 6,000 sq. ft. office to serve as its headquarters.  Additionally, to support the ongoing growth of the Operations Team, EagleLIFT’s logistics and dispatch center will now operate out of a new location in Rialto, CA.

The relocations were made to meet the demands of EagleLIFT’s continually growing business.  The operations team grew by two full-time crews and three trucks within the last year, and EagleLIFT has added four full-time team members to its administrative teams, including an engineering department.

“The new office locations will better serve our customers and meet our growth needs for the coming years,” states President and Founder, Donald J. Moody. “We have seen tremendous growth in the last five years as engineering firms, governments, and commercial building owners continue to adopt our polymer injection process and seek our foundation lifting expertise.”

EagleLIFT is the sole provider of the polymer injection process for California, Arizona, and Nevada.  The polymer injection process is used to stabilize unconsolidated soils to increase the soil’s weight-bearing capacity.  Additionally, the polymers are used for sealing joints on lateral lines, manholes and other water control structures against inflow and infiltration or settlement.  Overall, this process can be used for foundation repair and reinforcement, sewer sealing, culvert rehabilitation, soil densification or creating subsurface injectable barrier walls.

EagleLIFT is also a foundation piering contractor, providing push piers, helical piers and tie-back anchors for foundation reinforcement and lifting.

About EagleLIFT
EagleLIFT has offices in Ontario, CA, Concord, CA, Las Vegas, NV and Rialto, CA. EagleLIFT is a Class “A” General Engineering Contractor and holds SB, SBE and DVBE certifications and services Arizona, California and Nevada.

Comparing One-part vs Two-part Chemical Grout for Sewer Repair

Comparing One-part vs Two-part Chemical Grout for Sewer Repair

We are often asked to discuss the differences between using one-part and two-part chemical grout for manhole and lateral line repair. Obviously, we are a bit biased when it comes to using polyurethane (two-part) vs permeation (one-part) grout, however we are a provider of both, but only in the right applications.  That being said, we understand grout and we understand that each grout has its strengths and weaknesses and are situationally appropriate.   This article will discuss the advantages and disadvantages of using both for the purpose of sewer repair. In order to address the applicative potential of permeation and polyurethane grouts, we look at each aspect of the polymers, from chemical characteristics to installation requirements to costs.

Chemical Characteristics and Definitions

Polymer Injection Groundwater RestrictionPermeation grout is a direct pressure injection of a chemical fluid grout to fill spaces between soil particles without causing excessive movement or fracturing of the soil formation.  The one-part grout travels through a soil profile to permeate and densify the contact soil mass with a slight expansion of 2-3% of initial volume. The permeation grout binds as an open cell formation.

Polyurethane grout is a hydro-insensitive plural component grout that expands as a consequence of a chemical reaction.  The two-part grout sets and alters the physical properties of a geologic mass, traveling through a soil profile initially by permeation and then by densification due to an expansive exothermic reaction.  The polyurethane grout binds as a closed cell formation and has expansive qualities of 15 to 22 times initial volume.

Chemical Characteristics of Permeation and Polyurethane Grouts Comparison

Components  One-Part Permeation Grout Two-Part Polyurethane Grout
Water Reactive Qualities Hydrophobic, Hydrophilic Hydro-Insensitive
Soil Densification Process Permeation and Slight Expansion Permeation, Exothermic Expansion of Closed Cell Formation
Expansive Qualities 2-3% Expansion 1500 – 2200% Expansion
Cellular Aspects Open- Cell Closed-Cell
Cure Time Variable depending on moisture and catalyst 15 minutes to 90% Density

24 Hours to 100% Density

Compressive Strength N/A Free Rise

1,812 PSI (confined with Sand)

30 to 90 PSA Free Rise

<8000 PSI (confined with Soil)

Installation

Permeation grout utilizes a box truck and airless sprayer to deliver the grout with a wheeled gas generator. The product is pumped from a drum/pail and requires available moisture and a catalyst to cure.   The one-part grout is injected through 5/8” diameter steel tubing at a spacing of 3.0’ to 6.0’ centers.

The steel tubing is driven to the lowest targeted (termination) depth in a 90% vertical alignment.  As injection begins, the tubing is extracted during the injection and may be reused. The first and final injections are at 1.5 gallons and intermediate injections are at 1.0 gallon per foot.  Permeation grouting requires no monitoring for movement due to its low expansive qualities.

Polyurethane grout utilizes a fully self-contained injection rig with a 60kW diesel generator set, a 5hp 23 CFM air compressor and a refrigerated dryer/regulation system.  The systems use double diaphragm feed pumps and an impingement-style gun.

The ½” diameter steel tubing is driven down to discrete injection elevations.  The multiple injection elevations result in stacked spheres of polymer with the tubing being sacrificial upon completion of injection.  The tubing can be angled for void fill or centerline foundation repairs.  Due to the highly expansive qualities of the two-part chemical grout, monitoring for movement is required using a laser level.

Installation Comparison

Permeation Grout Polyurethane Grout
Installation Concept Columnar Spherical
Installation Method Extracting Tube Discrete Point Injection
Hole Diameter 7/8” ½”
Angled Injection Capable No Yes
Injection Spacing 3.0’ to 6.0’ 3.0’ to 6.0’
Water Sensitivity Requires the right mixture of moisture and catalyst.  Too much water can result in application not to cure.

 

Hydro-insensitive, is not affected by water
Equipment Box Truck

5 Gallon Drums

Airless Sprayer

Gas Generator

Self-contained Injection Rig

60kW diesel generator

CFM air compressor

Refrigerated/regulated system

Impingement Gun

Double diaphragm feed pumps


What about Costs?

When it comes to cost, there really isn’t a comparison between permeation and polyurethane grout.  This is for a variety of reasons, but the primary reason is that permeation grout takes nearly 200 – 400% more material than polyurethane grout, resulting in double to triple the cost.  Other aspects have to do with the multiple methods for installing polyurethane grout, whether through lateral injections or in highly saturated environments.

Advantages of Permeation vs Polyurethane Grouting

Permeation grouting has a couple of advantages over polyurethane.  The major advantage is that permeation grout can be used in fine sands and silty environments.  This is because permeation is the primary method in which the permeation grout is utilized (hence the name), allowing the grout to saturate the layer and the time to saturate throughout the soils.  Polyurethane grout is dependent on its expansion as a method for densification. Due to polyurethane’s limited ability to permeate fine sands and silts, the expansion pushes sandy soil layers opposed to binding, compression and stabilization.  This limits polyurethane’s ability to densify in these environments.

The limited expansion of permeation grout can avoid over-lifting issues that polyurethane may cause.  If polyurethane is overshot, then the polymer can damage sensitive structures, such as brick manholes or dilapidated CMP.  This being said, there are several examples in which two-part grouts are used to both stabilize and re-grout compromised brick manholes and CMP, so perhaps this is a matter of contractor expertise

Soil density and PSI are more consistent with permeation grout.  This allows designers to provide a more consistent and predictable pressure in the treated area.  Predictability is important to those that need to meet specific can be important depending on the situation. This an additional benefit when using permeation grout for tunneling and excavation, as the concentration of the grout is highly predictable and allows for the area of influence to be calculable when trying to design an excavation zone that is properly shored.

Advantages of Polyurethane vs Permeation Grouting

Firstly (and to some most importantly), polyurethane is by far a more cost-effective option and has a great deal more adaptability than permeation grout.  Although polyurethane is less effective in highly plastic and fine soils, it is highly effective in aggregates, soils with low granularity and where voids are present.   In these environments, polyurethane can provide higher pressure and compressibility than permeation grout.

Polyurethane is also not as sensitive as permeation grout in regards to soil conditions.  It is not dependent on moisture and is still effective in highly saturated environments.  Additionally, polyurethane’s cure time is fast, setting up to 90% density in 15 minutes whereas permeation grout requires approximately 24 hours in optimal situations.

Adaptability is a major advantage of polyurethane.  While permeation grout requires a vertical column in order to install, polyurethane can be shot both vertically and horizontally.  This allows for injections to occur from inside of the lateral line, manhole or culvert.   Additionally, the permeation and expansive stages of polyurethane help the polymer seek out any present voids and allow it to travel along structures to encapsulate and seal joint separation, voids around the structure and/or loose soils and aggregate.  Also, polyurethane can be used to lift and realign structures based on specifically designed injection patterns that lead to upward or lateral movement.

Weight is another area where polyurethane has an advantage over permeation grout.  The primary cause of this is due to the high expansion and close-celled nature of polyurethane.  Permeation grout works by densifying the soil layer with high saturation, requiring a great deal of product to rehabilitate a single soil layer.  The weight differences can range from 2-300% more than polyurethane.  With this being said, it really depends on the weights of polyurethane that is being used as there are variations of 2lb all the way to 8lb polymers that are uniquely designed for the application.

Scorecard – Permeation vs Polyurethane Grout

Permeation Grout Two-Part Chemical Grout
Cost Winner
Sandy and Silty Soils Winner
Adaptability of Installation Winner
Wet or Saturated Environments Winner
Void Fill Winner
Risk of Structural Damage due to expansion Winner
Weight Winner
Expansion Winner
Cure Time Winner
Highly Granular Soils Winner
Lifting and Leveling Winner
Predictability Winner


Conclusion

While on paper Two-Part Chemical Grout has more advantages than permeation grout, these advantages are still situational and to the preference of the owner/designer.  The importance of these factors are only relatable to the needs of the project and to the value placed by the decision makers.   Polyurethane is still a relatively new product being used for sewer rehabilitation applications, but it offers promising results when the benefits are understood and when the right contractor is involved in the design and installation.  Also to note, both permeation and polyurethane grout have a wide range of formulations and installation techniques that may overcome some of their weaknesses.