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03 June 2013

How to Choose a Grout for Sealing Mainlines and Laterals

Posted in Water & Wastewater

Below are some questions to consider when choosing a grout for sealing mainlines and laterals--before, after, or independent of lining:

  1. Cost: Cost should only be one factor. What is more important is that you are using the appropriate product for the job and the grout is applied correctly--in accordance with the 2012 NASSCO recommendation is a good start.
  2. Cost vs. Cure Time: Grouts have different cure times. Be sure to check tech data sheets to determine how much control over cure time you will have in the field. Better yet, you can do a more thorough investigation by performing your own tests. The more catalyst you need to reach the desired goal, the more money you'll spend on product.

03 June 2013

Joint Failure Not Always Obvious--Test Every Joint

Posted in Water & Wastewater

I visited a job site a few weeks ago and talked with the grouting operator. I found three things very cool:

  1. It was nice to visit a grout truck that was kept clean and orderly. This was a municipality that only has one crew responsible for each grout truck, so they treat it like their own.
  2. They air tested every joint. There is no point in grouting only the visible leaking joints and ignoring the ones that are not noticeable. The joints must pass an air test or should otherwise be grouted. If not, once you grout the leaking joints, the groundwater simply migrates to the next joint and enters there.

31 May 2013

Miami-Dade Attacks Infiltration and Scores Major Win for the Community

Posted in Water & Wastewater

I recently visited with Rod Lovett and Juan Bedoya with the Miami-Dade Water and Sewer Department. It was great to see them and meet some of their crew. Last year alone, Miami-Dade invested in nine new grout trucks. After 25+ years of grouting, it is encouraging to see one of the largest municipalities in the country so committed to stopping water infiltration. 

05 March 2013

Act Responsibly. Think Safety First.

Posted in Industry News

The military may ask you to lay your life on the line at times. A number of us here at Avanti are prior military. But risking your life waterproofing in a confined space is just silly and avoidable. Did you know that in a low oxygen environment, people will act normally at first, but will then abruptly feel dizzy and black out in a matter of seconds?

25 February 2013

Selecting the Right Product Saves Time, Money, and Headaches

Posted in Industry News

Chemical grouts are used before, during or after construction in a variety of applications including groundwater control, soil stabilization, void filling, encapsulation and structural lifting of concrete slabs. Because there are many kinds of chemical grouts it is important to review and match the needs of the project with the specific characteristics of the grout. For example, some resins are designed to permeate soil, rock or superfine cracks and cure with no expansion. Others are designed to fill large voids and expand up to twenty times their original volume. Some are shipped to the job site as a liquid which requires less mixing before injection, or in a granular form in order to maximize space on the jobsite and reduce shipping costs.

14 December 2012

Chemical Grouting Tips

Posted in Industry News

Never lose man hours over the simple stuff!

  1. Have extra Zerk® couplers onsite in case you gum one up.
  2. Line your grout buckets with thick mil garbage bags. This makes clean up easy, saves the pail, and prevents the grout from being contaminated.
  3. Get a socket wrench to install packers. It really speeds up their installation.

21 November 2012

Was it Teaching or Adding Depth to Different Perspectives?

Posted in Industry News

Was it Teaching or Adding Depth to Different Perspectives?

The two-day Urethane Injection School November 13-14 was a rich learning experience for everyone including Avanti team members. The talent pool in the audience ranged from owners of multi-disciplined construction companies to engineers from Mexico to presidents seeking to expand their services. So how do you advance the individual skill-sets within a group so widely diversified? Answer: See, Touch, Experience.

10 September 2012

Creativity—Sometimes the Most Important Ingredient

Posted in Industry News

PLACE: Tacoma, Washington
PROPERTY: Oil Recycling Station
PROBLEM: Retaining wall with 10 access holes and two 8" HDPE pipe penetrations less than 4' from railroad tracks. 

The engineering drawing called for "Flexible Material" surrounding these pipe penetrations, but provided no recommendation or specification. Avanti Field Services visited the site and noted the high probability of pipe deflection and movement as tanker cars went over them. This conundrum required a creative solution.

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