Maria Burton, REU Student Shiva Sunder, Graduate Mentor Dr...
Transcript of Maria Burton, REU Student Shiva Sunder, Graduate Mentor Dr...
Maria Burton, REU Student
Shiva Sunder, Graduate Mentor
Dr. Cumaraswamy Vipulanandan, Faculty Advisor
� From liquid to solid with time
� Foundation stability
� Modify or improve the ground
� Mend leaking sewer system
� Fill voids, seal joints, connect pre-cast concrete sections
� Improve the strength and reduce the permeability of in situ
What is Grouting?
� Improve the strength and reduce the permeability of in situ
soils
What is Surfactant?�A blend of surface acting agent
� Surface tension of water gets reduced
� Hydrophobic “tails” and hydrophilic “heads”
� Dishwashing liquid, laundry detergent powders
Literature Review
Ozurel and Vipulanandan (2005) – Acrylamide Grout with Water
*diluting acrylamide grout with water affects the mechanical properties
of grouted sands, however, diluting grout with up to 50% of water does
not affect the permeability of grouted sand
Tomomi (2004) – Surfactants in Starches
*The final viscosity of cereal starch paste with surfactants was found to
be higher than control; higher surfactant concentration leads to higher
final viscosity of cereal starch paste
Queimada (2003) – Surface tension & Viscosity Relationship
*In 1966, Pelofsky introduced a linear relation between surface tension
and viscosity
(1) Study viscosity, temperature, and gelling time of
acrylamide grout as it varied with time
(2) Study viscosity, temperature, and gelling time of
Objectives
Focus: Observe effects of a cationic surfactant on
acrylamide grout & grouted sand properties
(2) Study viscosity, temperature, and gelling time of
acrylamide grout as it varied with time with
surfactant added
(3) Study compressive strength of acrylamide grouted
sand
(4) Study compressive strength of acrylamide grouted
sand with surfactant added
Grout: AV-100 acrylamide chemical grout
Catalyst: AV-102
catalyst AP Activator: AV-101
catalyst T+
Materials
Surfactant: Cetyltrimethylammonium bromide,
CTAB, cationic surfactant (+)
standard coarse fine 60% fine, 40% coarse
Sands:
AV-100 grout
+
Viscosity - Grout (without surfactant)
+
Water
viscosity in viscometer…
Viscosity vs. Percentage of AV-100 by weight
AV-100 grout
+
Temperature with time - Grout Mix (without surfactant)
+
Catalyst
+
Activator
+
Water
Temp. in viscometer…
Temp. sitting idle…
Temperature vs. Time
While in viscometer…
(stirring involved)
Out of viscometer…
(no stirring)
AV-100 grout
Viscosity – Grout (with surfactant)
AV-100 groutAV-100 grout
+
Surfactant
+
Water
AV-100 grout
+
Surfactant
+
Water
viscosity in viscometer…
Viscosity vs. Surfactant Content
AV-100 grout
+
Temp. & Density with time – Surfactant-Grout Mix
+
Surfactant
+
Catalyst
+
Activator
+
WaterTemp. sitting idle… density - change in weight…
Temperature vs. Time – Surfactant-Grout Mix
Density vs. Time – Surfactant-Grout Mix
Surfactant-Grout Mixes
mix 11 ii mix 11 iv
Sand
Filter
Disposal
BucketGrout out…
Grout injection mold set-up…
Sand
Filter
Air
PressureGrout in…
Specimens being injected with grout mix…
Specimens coated with sulfur… Tri-axial Testing machine
Specimen
in Tri-axial
Machine…
Sulfur
Load
Grouted
Sand
Specimen
Sulfur
Base
Load applied to specimen until failure…
(grouted with grout mix without surfactant)
Specimens 1-8 after failure…
1 5 6 7 8432
Variation in strain with d50
Variation in strength with d50
Variation in strain with d50
Specimens 9-16 after grouted with surfactant-grout mix
Conclusion
With the addition of surfactant in acrylamide grout…
(1) gelling time increased
(2) the viscosity increased
(3) the rate of temperature-increase with respect to time
decreaseddecreased
(4) strength of the grouted sand decreased
>> CTAB surfactant modified the grout properties
>> Grouted sand properties were reduced (or affected) by the
addition of surfactant
Acknowledgment
The research study described herein was sponsored by
the National Science Foundation under the Award No.
EEC-0649163. The opinions expressed in this study are
those of the authors and do not necessarily reflect the those of the authors and do not necessarily reflect the
views of the sponsor.