BELTRÃO, S. L. D.; http://lattes.cnpq.br/5883534190093028; BELTRÃO, Suellen Lisboa Dias.
Résumé:
The built environment of the future is being built at the beginning of a new
was ecological, that of re-use. In this sense, the use of waste as
alternative way of replacing the cement in mortars can
reach the level of sustainability. Excessive production of waste from
kaolin in the state of Paraíba and in the interior of the state of Rio Grande
has been under investigation. The kaolin residues from the
processing of kaolin classified as
waste are disposed of indiscriminately in the environment,
causing great environmental impact and damaging the surrounding population
of waste batteries. In an attempt to propose alternatives for reuse
of this waste and the production of innovative materials for the most varied
sectors of construction, this paper presents the objective of evaluating the
mechanical behavior and durability of mortars incorporated with
residue of calcined kaolin. The mixture used was composed of 50%
kaolin residue + 50% fine kaolin residue, were incorporated into the
mortars in 1: 2: 6 and 1: 2: 8 mass proportions with
cement substitution of 0%, 5%, 10%, 15%, 20% and 30%. 0%, 5%, 10%, 15%, 20% and 30%. The mortars
were submitted to different cures, these being carried out in an environment
internal and external environment, obeying the ages of 30, 60, 90, 180 and 360
days and subjected to the tests of accelerated durability by means of the
wetting and drying cycles. For the incorporation of this residue in
mortars were carried out the physical, chemical and mineralogical characterization
of the residue, as well as the evaluation of the burning temperature of the residue for
evaluation of pozzolan reactivity. Pozolana with better characteristics
physics was determined at a temperature of 800 ° C and from this it was
the incorporation of the residue of calcined kaolin in the form of
pozzolan in mortars. 50 cylindrical specimens were molded
mm x 100 mm. The specimens according to the type of cure and age were
evaluated mechanically by the compressive strength test
simple. Samples of the mortars were sprayed in pistil with
porcelain mortar and sieved in No. 200 ABNT sieve after the test
compression strength to be analyzed by
X-ray diffraction, differential and gravimetric thermal analysis
values presented, mortars with
by the residue of calcined kaolin, can be classified according to the
with NBR 13281 (2001) as Type I with resistance values
mechanics ≥ 0.1 and ≤ 4.0 (MPa) and Type II with ≥ 4.0 and ≤ 8.0 (MPa) for both
traces 1: 2: 6 and 1: 2: 8.
