Dynamics of Hardening of
Polyester-Silicate Adaptive Compositions for Binding Silicate Concrete with
Polyester Polymer Concrete
*Department of Fundamental Medical Sciences, Education and Scientific Sector of Medical Chemistry, Medical University, 55 Prof. M. Drinov Str., 9002 Varna, Bulgaria
**Central
Laboratory of Physico-Chemical Mechanics, Acad. G. Bonchev Str., bl.1,
Bulgarian Academy of Science, 1113 Sofia, Bulgaria
***Technical University, 8
Kl. Ohridsky Blvd., 1756 Sofia, Bulgaria
The efficient combining of silicate
concrete and polyester polymer concrete, the latter characterized by higher
mechanical strength and chemical resistance, requires good adhesion between the
two components. The problems arise from the fact that one of them (the
silicate) is hydrophilic, while the other is hydrophobic. In order
to achieve compatibility, several polyester-silicate compositions have been
proposed, which lead to an adaptive, adhesive bond in the combined
constructions. The paper presents an investigation of the dynamics of hardening
of the adaptive compositions containing hydrophilized unsaturated polyester
resin and grout, depending on the molar ratio between the hydrophilizing agent
and the unsaturated polyester. It has been established that the compositions
are reactive. The increase of the percentage of the hydrophilizing material
results in the increase of the gel period and the exothermy of the process of
hardening.
Keywords: Polymer-matrix composites, Hydrophilization of resins, Curing
# Address for correspondence:
Assoc. Prof. Antonia Topliyska,
Central Laboratory of Physico-Chemical Mechanics, Bulgarian Academy of Science, Acad. G. Bonchev Str., bl.1, 1113 Sofia, Bulgaria
e-mail: antonia@clphchm.bas.bg fax:+359 2 703433