Saturday, November 30, 2019

Waterstop: Quality Assurance and Installation Failures

Waterstop quality assurance specification should contain the following:
Edge welding will not be permitted. Centerbulbs shall be compressed or closed when welding to non-centerbulb type. Waterstop splicing defects which are unacceptable include, but are not limited to the following:
A. Tensile strength is not less than 60 percent of parent sections.
B. Free lap joints.
C. Misalignment of centerbulb, ribs, and end bulbs greater than 1/16 inch.
D. Misalignment which reduces waterstop cross-section more than 15 percent.
E. Bond failure at joint deeper than 1/16 inch or 15 percent of material thickness.
F. Misalignment of waterstop splice resulting in misalignment of waterstop in excess of 1/2 inch in 10 feet. 
G. Visible porosity in the weld.
H. Charred or burnt material.
I. Bubbles or inadequate bonding.
J. Visible signs of splice separation when cooled splice (24 hours or greater) is bent by hand at a sharp angle.
Below is a gallery of waterstop installation failures.
Snaked waterstop, probably from "wet setting" the waterstop.
Waterstop with cuts for rebar.
Edge welded waterstop failure.
Improper waterstop embedment.
Edge welded waterstop failure.
Waterstop glued together with epoxy.
Waterstop corner install failure.
Waterstop installation failure.
Additional waterstop installation guides can be found here.


Sunday, November 17, 2019

Waterstop Keyway Former — How to Form a Keyed Construction Joint with Waterstop

Four easy steps to form a keyed joint with embedded waterstop.
Keycup™ is a multi-function, reusable concrete accessory that is used to securely hold waterstop in place while simultaneously creating a keyed construction joint. Typical applications include:
  • Slab on grade
  • Wall joints
  • Lumber replacement
  • Labor saver
Keycup1 part number 2" x 120" waterstop keycup
Keycup2 part number 3" x 120" waterstop keycup

For more information visit Keycup.

Patent Pending


Sunday, October 20, 2019

Concrete Contractors — Save Time and Money with the ST-10® Waterstop Splicing Table

The ST-10® Waterstop Splicing Table by J P Specialties, Inc.

The ST-10® was designed and patented by J P Specialties as the perfect solution for producing high-tensile strength, leakproof welds on thermoplastic waterstops such as PVC, HDPE, LDPE, TPER, and TPV. New quality assurance standards in today’s waterstop specifications mandate tensile testing across field welded joints, usually requiring tensile strength 80% or better of the parent material. Waterstops welded with the ST-10® assure the Contractor that their workmanship will yield results conducive to these rigorous requirements. The ST-10® is also an extreme labor saver, taking a two-man job — welding waterstop — and taking it down to just one man.

  • Easy to use
  • Aligns the waterstop
  • Portable, lightweight
  • Weather resistant
  • Minimizes fumes (maximizes safety)
  • High tensile welds
  • Welds under pressure, eliminating air bubbles

Saturday, August 24, 2019

Integrated Expansion Board Cap Waterstop


Integrated expansion board cap waterstop systems are designed to replace post-applied joint sealant, and provide a fluid-tight internal seal like a traditional waterstop with a one-step, integrated unit. Install Earth Shield® expansion board cap waterstop on top of conventional expansion board filler or Earth Shield’s chemical resistant, plastic expansion board. The expansion board acts as the form; therefore, no form splitting is necessary, significantly accelerating the project schedule and provides a long-lasting, attractive finished concrete joint. Earth Shield® screed key cap slides over the top of the metal screed key, eliminating the need for sealant. Like all our thermoplastic vulcanizate waterstops, Earth Shield® integrated cap system waterstop can be heat-welded using a standard waterstop splicing iron allowing for easy field fabrications and allows the waterstop to function as a continuous, homogeneous, fluid-tight diaphragm. Waterstop directional changes are available along with straight roll stock. Custom, fit-to-print waterstop modules are produced to order. Prefabricated ells, tees, tank pads, column fittings, and many others are in stock and ready to ship.

Saturday, May 11, 2019

Introducing Type NB190® Hydrophilic Waterstop Paste

Type NB190® Hydrophilic Waterstop Paste
Designed for use as a waterstop in new and retrofit concrete cold joint construction. May also be used as an adhesive for Type NB190® Hydrophilic Waterstop.

Properties

  • NB190® Hydrophilic Waterstop Paste is a moisture curing, hydrophilic, elastomeric sealant.
  • Exhibits flexible, resilient rubber that adheres to a wide variety of substrates. 
  • Over 100% hydrophilic expansion in 48 hours.
  • 250% hydrophilic expansion in 30 days.
  • Solvent free, 100% solids, will not shrink.
  • Tack free skin is formed in 60 minutes (@ 75°F / 23°C)
  • Typical cure takes place in 24 hours.
  • Available in 10.5-ounce cartridges.
  • Shelf Life: 12 months when stored at temperature not exceeding 80°F
  • Color: Red
Typical Uses
  • Concrete cold joints.
  • Expanded metal forms.
  • Pipe or circular penetrations.
  • Crack and joint repair.
  • Sheet pile interlocks.
  • Precast segment sealant.

Tuesday, May 07, 2019

Monday, February 11, 2019

Concrete Joints

Waterstops are used to fluid-proof concrete joints. (Pictured is Earth Shield® PVC Waterstop part no. PVC638.)

Contraction Joints
Contraction joints are used to divide large pours of concrete into smaller structural units. Contraction joints create a man-made plane of weakness to regulate and control (another name for a contraction joint is a control joint) the location of a crack formed by moisture loss of concrete. Without this formed contraction joint, the concrete would freely crack in unexpected and unattractive places.

Construction Joints
An interruption of the concrete pour 30 minutes or greater creates a construction joint.

Expansion Joints
Expansion joints are designed to negate the compressive forces from abutting concrete structures that may occur as a result of expansion, loads, or differential movements from the settlement. Expansion joints require an actual gap between the concrete pours, and a compressible joint filler material such as foam, rubber, cork, or cane fiberboard.

Saturday, January 12, 2019

Earth Shield® PVC Waterstop Achieves NSF 61 Certification

Certification to NSF/ANSI 61 demonstrates compliance with nationally-recognized 
health effects standard for all drinking water treatment chemicals.

J P Specialties, Inc. has earned certification to NSF/ANSI 61, the American National Standard for Drinking Water Treatment Components – Health Effects for its Earth Shield® PVC Waterstop from global public health organization NSF International. 

Government agencies around the world utilize NSF International standards to verify the safety and performance of water treatment chemicals, pipes, and plumbing components and to ensure these products do not leach harmful levels of contaminants into drinking water. 

To earn NSF/ANSI 61 certification, J P Specialties’ Earth Shield® PVC Waterstop was subject to rigorous testing and evaluation to verify the product met requirements for use in drinking water. NSF International also audited J P Specialties’ manufacturing facility to verify compliance with the standard requirements.

About NSF International: NSF International is a global independent organization that writes standards and protocols, and tests and certifies products for the food, water, and consumer goods industries to minimize adverse health effects and protect the environment. Founded in 1944, NSF is a Pan American Health Organization/World Health Organization Collaborating Center on Food Safety, Water Quality, and Indoor Environment.

Friday, December 21, 2018

Free DeWalt® Drill Driver With Qualifying Earth Shield® Retrofit Waterstop Orders

DeWalt DCF885C2 Drill Driver
The DEWALT® DCF885C2 20 V MAX lithium-ion 1/4-in impact driver kit is compact and lightweight for fitting in tight spaces and increasing productivity. Belt hook allows the user to be mobile.


  • DCF885C2 kit includes one 1/4-in impact driver, two 1.5 Ah 20-volt MAX Li-ion battery packs, one DCB107 fast charger, and belt hook
  • High-performance motor delivers 0-3,200 BPM
  • Variable-speed trigger (0-2,800 RPM) provides control, and the impact mechanism produces 1,400-in-lbs max torque
  • 1-handed, 1/4-in hex accepts 1-in bits
  • Two 20-volt lithium-ion batteries with 1.5-Ah and 30-min charge
  • Lightweight 2.8-lb design reduces user fatigue
  • 3 LED lights provide visibility without shadows
  • Made in USA with global materials
  • Convenient belt hook keeps the tool close at hand

Beginning now through while supplies last, every Earth Shield® Retrofit Waterstop order $5000 or greater will receive a free DeWalt® DCF885C2 Drill Driver. Contact your Earth Shield® sales representative for more information.