Abstracts Book - IMRC 2018

• SE2-O020
STUDY OF THE BEHAVIOR OF THE NORMAL RESISTANCE
CONCRETE WITH THE INCORPORATION OF ALKALINE ACTIVATED
STEEL SLIDES AND POLYPROPYLENE FIBERS EXPOSED TO HIGH
TEMPERATURES
Martin Eduardo Espitia Nery 1 , Dery Esmeralda Corredor 1 , Edisson Cordoba 1
1 Corporación Universitaria Minuto de Dios, , Colombia.
This work focuses on the development of a type of compound necessary to improve
the mechanical, physical and chemical properties of the traditional mixture of
concrete, when exposed to certain high temperature conditions.
High temperatures influence the durability of concrete structures causing
undesirable structural failures although there are also factors that can help the rate
of temperature increase affect the design of the concrete, so for example: the
composition, permeability, size and degree of cracking
The impact to which the structures are subject to high temperatures is imminent,
therefore in this investigation has developed a cementing compound based on steel
slags activated alkaline with sodium hydroxide (NaOH) and sodium silicate
(Na2SiO3) in different dissolution solutions In addition, polypropylene fibers are
incorporated into the normal resistance concrete design.
The experimental program includes tests of compressive strength, flexural strength
and mass losses of specimens with composite material based on slag and fibers
and specimens without the incorporation of these materials, that is, concrete design
of normal resistance, with In order to have a comparison, in addition a general study
of the residuals of materials after exposures to high temperatures by means of SEM
and DRX is made. The tested materials were exposed to temperatures of 200-500-
800-1000 and 1200 ° C
Alkaline active steel slags provide the concrete mix with greater mechanical
strength at high temperatures and the polypropylene fibers prevent shrinkage of
the cement paste drying due to a structural and chemical composition of the gels
(calcium silicate hydrate or C-S-H)..
Keywords: Concrete, Mechanical Properties, High temperatures
Presenting authors email: mespitian@yahoo.com