Post on 06-Jul-2015
description
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An Introduction to AquaBlok®
:
A Unique, Patented & Highly Versatile Bentonite-Stone Composite
Objectives
Introduce AquaBlok – the original invention, its history,
and the evolution of associated products
Discuss key technical advantages – focusing
particularly on VERSATILITY
Explore various application scenarios – relating
primarily to sealing/containment
Field preliminary questions
BENTONITE: 101
Naturally Occurring – weathering volcanic ash
- composed mostly of montmorillonite
- classified by dominant elements (e.g. Na and Ca)
Known for Swell- ionic interaction between water and mineralogy create
“shingle effect” when exposed to water
Recognized for Low Permeability- used for generations in sealing and water proofing
applications in a broad range of commercial and
environmental settings
Not Your Average Clay
BENTONITE: 101Swell + Compaction = Low Permeability
sodium bentonite
powder
AquaBlok® bentonite-stone
composite particle
+
crushed limestone
=
solid aggregate core
powdered bentonite
with adhesive binder
Composite Particle System
PONDSEALTM +
ORGANOCLAY
HoleBlokTM
SALTWATER
solid aggregate (limestone) core
sodium bentonite and adhesive binder
expands when hydrated
not to scale
Material Composition
average
particle
1/4 - 3/8”
(dry)
PONDSEALTM
time
PONDSEAL1 min posthydration
PONDSEAL24 hr posthydration
Values & Technical Advantages
Technically Effective – extreme low permeability a
result of reliable swell and self-compaction
Offers Targeted Placement – even through water
- will not drift or dissipate, minimal dusting
Easy to Handle – behaves much like stone aggregate
- installed by hand or using a broad range of standard
construction equipment
- no need to mechanically compact the material
Durable
- Self-healing (even through drying and re-hydration)
- Self-supported (thanks to internal aggregate core)
PONDSEALTM
Values & Advantages, cont . . .
Eco-friendly – comprised entirely of earthen ingredients
- Does not detrimentally alter water chemistry
- Evaluated by EPA in projects throughout US & beyond
Aesthetically Pleasing – looks like natural clay
Adds Safety – reduces exposure and manual labor
Versatile – available in two convenient package sizes to
address a broad range of technical challenges in and
around aquatic environments
THINK “NATURE’S DUCT TAPE ” . . .
PONDSEALTM
Before Hydration After Hydration
substrate
water
column
not to scale
time
PONDSEAL
sealant “blanket”
Layer of
PONDSEAL
particles
immediately
following
placementsealant
layer
PONDSEALTM
Applications & Usage
Sealant “Blanket” Lining
PONDSEALTM
substrate
not to scale
PONDSEALTM
sand/gravel lens
PONDSEAL
Applications & Usage
Sealant “Blanket” Lining
PONDSEALTM
Applications & Usage
Sealant “Blanket” Lining
not to scale
substrate
seep
PONDSEAL
barrier
PONDSEALTM
BEFORE
AFTER
Applications & Usage
Vertical Barrier Trench Construction
Applications & Usage
Vertical Barrier Trench Construction
PONDSEALTM
Application RatesPONDSEAL
TM
*** Bulk density of dry material = ~85 lbs./ft3 ***
Blanket Application Examples –(Typical application target: 0.75” – 1.5” dry thickness)
5-lbs./ft2 @ 0.75” dry thickness (500-lbs./100 ft2)
6.9-lbs./ft2 @ 1.0” dry thickness (690-lbs./100 ft2)
10-lbs./ft2 @ 1.5” dry thickness (1,000-lbs./100 ft2)
Vertical Barrier Trench Application Examples –(Assume 12” of surface soil backfill)
Trench Dimension: 0.5’W x 6’D x 25’L = 5,200-lbs.
Trench Dimension: 1’W x 8’D x 25’L = 14,525-lbs.
substrate
not to scale
Preferential Pathways
PONDSEALTM
remnant tile
reinforced overflow structure
repaired muskrat lodge
Applications & Usage
anti-seep plug
torn synthetic liner
Reinforcing/Bedding Control Structures
Applications & UsagePONDSEAL
TM
Anti Seep Collar/Plug Installation
Applications & UsagePONDSEAL
TM
Plugging Remnant Field Tiles
Applications & UsagePONDSEAL
TM
Torn/Compromised Synthetic Liner
Applications & UsagePONDSEAL
TM
Repairing/Discouraging Animal Damage
Applications & UsagePONDSEAL
TM
Sink Holes
Geotechnical Applications
Anti Seep Collars & Trench Dams
Geotechnical Applications
*** Bulk density of dry material = 85-90 lbs./ft3 ***
bedding
AquaBlok
Examples:
3’L x 1’W x 3’H = 810-lbs*
5’L x 1’W x 5’H = 2,250-lbs*
* Less volume occupied by pipe, example:
10’L x 1.5’W x 8’H dam with 36” pipe
= 120 ft3 (trench dam) – 10.6 ft3 (pipe)
= 10,800-lbs – 950-lbs = 9,850-lbs
L
H
W
Trench Dam Application Rates
Other Geotechnical Applications
Wastewater Lagoon Linings/2° Containment
Landfill Applications
Gas Pipe Sealing
Stream Bank Stabilization
Manhole Spacers/Risers
Packaging OptionsPONDSEAL
TM
50-lb. bags48 bags/pallet (2,400-lbs.)
Durable 3-ply paper bags
Available singly and by the pallet
Bulk bags2,400-lb (1cy) per
Water resistant poly with
discharge snout
Geotechnical Data
Dry State Characteristics
Permeability
Percent Swell
Shear Strength
Erosion Resistance
Swell Pressure
Bearing Capacity
Compaction
Freeze/Thaw Response
All testing conducted by
independent, AASHTO-
certified soils lab