Camilo Higuera Flórez

National University of Colombia | UNAL · Department of Civil Engineering and Agricultural (Bogotá)

In this paper, electrochemical Impedance spectroscopy (EIS) is used to investigate the effect of the interfacial transition zone (ITZ) on the transport related properties of Portland cement mortars. The ITZ between the cement paste and the aggregate provides a significant pathway for chloride transport which causes corrosion of reinforcing steel. T...

RESUMEN Teniendo en cuenta los problemas ambientales asociados con la producción del Cemento Portland (CP), en los últimos años se ha promovido el uso de la Ceniza Volante (CV) en la producción de concretos. La utilización de la CV se ha dado principalmente mediante su activación con el CP y como material cementante geopolimérico. En este artículo...

El uso de fibras de tereftalato de polietileno (PET) en el concreto representa un gran avance en la industria de la construcción ya que estas fibras contribuyen a la disminución de la fisuración por esfuerzos de tensión y por fenómenos de retracción plástica, además de incrementar la durabilidad de los compuestos basados en cemento. Sin embargo, a...

This paper summarizes the results of a research aimed to show and analyze the results of a probabilistic model to predict the corrosion of steel embedded in fly ash concrete, through a multiphysical and multispecies model. This model developed to simulate the transport properties of ionic species was based on the finite element method applied to th...

Lightweight concrete (LWC) has become an outstanding material in the construction sector to conform non-structural and structural members into buildings. Expanded clay aggregate is a special type of lightweight aggregate formed by heating clay with little lime content, having low unit weight, high durability, and mechanical strength. Despite the ma...

Nanotechnology encompasses a broad market of multiple raw materials at scale of one billionth of meter. This market is in ongoing growing and serves many fields of science and industry, where the construction sector is no exception. Particularly, nanosilica is a material that has been recently used in the construction sector on a mass scale, b...

The effect of nanosilica under the influence of dispersing agents on the fresh empirical and fundamental rheological properties of self-compacting concrete (SCC) is a complex phenomenon which has been investigated in this paper. Models to predict the rheological properties of nanosilica blended SCC are also lacking to avoiding/saving comprehensive...

En la actualidad, el sector de la construcción es una de las actividades con mayor impacto, razón por la cual es necesario buscar materiales que contribuyan favorablemente al medioambiente. Con esta premisa, en el presente artículo se estudia la implementación de caucho de neumático reciclado como apoyo elastomérico en vigas simplemente apoyadas. P...

Recently 3D-printed concrete has emerged as an innovative material for the manufacture of low-cost buildings worldwide. The 3D printed concrete technique allows the manufacture of buildings with substantial savings in cost and construction time both up to 70% compared to traditional construction systems. However, there are some unknowns about the u...

Fiber-reinforced concrete has become a widely used alternative in construction as the fibers contribute to the reduction of cracking and improve some of the mechanical properties of cement-based materials. On the other hand, Polyethylene Terephthalate (PET) has become one of the main sources of contamination, because it is a poorly biodegradab...

Nowadays, lightweight aggregate concrete (LWAC) made from expanded clay aggregates has become a widely used material around the world. However, the use of this type of concrete has not been implemented on a long scale in Colombia, because expanded clay aggregates have not been fully characterized and tested. For this reason, the objective of this s...

(Figure Presented). Taking into account the environmental problems associated with the production of Portland cement (PC), in recent years the use of Fly Ash (FA) in the production of concrete has been promoted. The use of fly ash has been possible through the activation with Portland cement and as a geopolymeric cementitious material. In this pape...