REPAIR COMPOUND MODIFIED BY NANO PARTICLES OF
FERROUS OXIDE
O.S. Tatarintseva, S.N. Novosyolova, T.K. Uglova
Institute for Problems of Chemical and Energetic Technologies SB RAS
Biysk, Altai region, Russia, labmineral@mail.ru
The results of influence study of nano-dispersed ferrous oxide on
characteristics of the composite material developed earlier (compound)
and intended to repair and recover engineering structures and massifs
have been presented in this paper. The compound consists of
multicomponent polymer matrix, including epoxy oligomer, lowmolecular synthetic rubber, plasticizer and process additives, filler and a
low-temperature amine hardener. Microcalcite with particle size less
than 50 μm has been used as filler.
The composite has been modified with nano powder of ferrous
oxide (II) (manufactured by MACH I, Inc., USA) consisting of needlelike crystalline particles with average size 4 nm and having specific
surface area 237.9 m2/g.
Experiments have shown that even distribution of nano particles
in epoxy resin is caused with a high-velocity mechanical device under
the additional influence of ultrasonic field.
The most important things for low-viscosity repair compositions
applied to recover the integrity of natural materials are high flowability,
determining the ability to fill narrow-opened fractures, and stability of
strength properties for a long time.
The positive effect of ultra-dispersed modifier is seen within the
range of 0.30-0.35 % of its percentage in the composition, as shown by
results of the study given in the Table. At these amounts the maximum
values of flowability and mechanical characteristics have been provided.
The logical increase in samples density indicates the optimality of the
packing developed and reduction in the porosity of a composite material
that is important while using it in conditions on high humidity.
The compound developed is environmentally friendly,
incombustible, waterproof, stable to heat, vibration and long mechanical
loads and can be used to perform repair work in construction industry,
public service, stone mining and processing industries, and architecture.
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Table. Percentage influence of ferric oxide nano powder on technical
characteristics of the composite material
Characteristics
Dynamic viscosity
at T = 20 oC, Pa·s
Flowability, cm
3
Density, g/m
Compressive force,
MPa
Relative deformation,
%
Value at modifier percentage, %
0
0.10
0.20
0.30
0.35
0.40
21.0
21.2
22.5
26.2
26.6
28.8
4.8
4.8
4.8
5.2
5.3
4.5
1.41
1.41
1.43
1.45
1.46
1.46
79
78
79
82
86
74
0.23
0.21
0.21
0.25
0.25
0.20
185