Аннотации:
The object of the study is the chemical
resistance of concrete modified with granite
dust and acrylic latex. The materials used
in the study were concrete samples with
a variable composition of additive components, which were subsequently exposed to
an aggressive environment. The problem,
which the research is aimed at solving, is
the tendency of concrete structures to fail
under prolonged exposure to acidic conditions, which significantly reduces their
service life. This research aims to address
this issue by incorporating modifying additives that improve concrete’s resistance to
chemical attack. The experimental program
involved testing concrete specimens with different concentrations of granite dust (1–4 %
by cement mass) and acrylic latex (0.1–0.4 %
by water mass) in a 10 % sulfuric acid solution for up to 360 days. Strength loss was
assessed at regular intervals, and chemical resistance coefficients were calculated
to evaluate durability. Additionally, longterm degradation predictions were made
using logarithmic models. The results show
that the optimal composition – 4 % granite
dust and 0.4 % acrylic latex –significantly improves chemical resistance, with specimens retaining up to 49 % of their initial
strength after 100 years of exposure. The
enhancement is attributed to the densification effect of granite dust, which reduces permeability, and the hydrophobizing
properties of acrylic latex, which minimize
acid penetration. Compared to unmodified
concrete, the proposed composition demonstrates lower strength loss and higher durability under aggressive conditions. The proposed modified composition offers a reliable
solution for extending the service life of reinforced concrete structures exposed to chemical degradation
