This paper evaluates the mechanical properties, modulus of elasticity (E) and critical stress intensity factor (KIC), of self?compacting concrete with the addition of hook-ended steel fibers, implementing Digital Image Correlation (DIC) to obtain the horizontal and vertical dis...
Autor(es): Eduardo Zapata. David Sebastian Cotes. Valeria Quiceno.
This paper presents experimental and computational findings related to the compressive strength of concrete containing nano-SiO2, fly-ash, silica fume, and polycarboxylate-superplasticizer. At different days of aging, three central-composite experimental designs were perf...
Autor(es): Eduardo Zapata. Genock Portela. Marcelo Suárez. Brian Green.
El ataque externo de sulfatos en el concreto está relacionado con la formación de componentes que contienen sulfatos expansivos en el estado endurecido de las muestras de concreto. El objetivo de la presente investigación consiste en estudiar el uso de la técnica de la velocida...
Autor(es): Ricardo Alfredo Cruz. Eduardo Zapata. Luz Amparo Quintero. Julian Herrera.
The replacement of cement by mineral admixtures in concrete has been of increasing interest in the construction industry. Nevertheless, several of the potential replacements, such as fly ash class F, lower the compressive strength of concrete at early age. This project ...
Autor(es): Eduardo Zapata. Nitza M. García Berrios. Oscar Marcelo Suárez. Mauricio Cabrera Rios.
Experimental investigations were carried out for assessing the influence of thermal loadings on the physical and mechanical properties of plain concrete after fire exposure. Cylindrical specimens were subjected to thermal loading at different temperatures inside of a muffle fur...
Autor(es): Ricardo Alfredo Cruz. Eduardo Zapata. Julian Orlando Herrera. Luz Amparo Quintero Ortiz.
Despite the importance of the Weibull modulus in reliability analysis of brittle materials, the majority of the studies are focused on plain concrete; the data being especially scarce for nano-SiO2-concrete. Therefore, this paper investigates the concrete tensile stren...
Autor(es): Eduardo Zapata. Genock Portela. Oscar Marcelo Suárez.
This study aims to assess the effects of micro and nano-SiO2 under various dosages of carboxylated-polyether-copolymer-type superplasticizer on the rheological properties of grouts in the fresh state. In the hardened state, compressive tests and scanning electron microscopy w...
Autor(es): Eduardo Zapata. Genock Portela. Oscar Marcelo Suárez. Olveen Carraquillo.
Iron slag as fine aggregate replacement and nanosilica particles in selfcompacting concrete mixtures
Autor(es): Maria Fernanda Mantilla. Jhon Alejandro Villamizar. Sergio Ruiz. Eduardo Zapata.
Ecuaciones de módulo de elasticidad en concreto sin refuerzo deducidas desde ensayos no destructivos: impact echo y velocidad de pulso ultrasónico
Autor(es): Eduardo Zapata. Juan Camilo Garcia. Gina Marcela Garrido.
Tensile behavior by weibull analysis in Binary, Ternary, and Quaternary concretes designed with micro and nano-silica additions
Autor(es): Eduardo Zapata.
Desempeño mecánico y en estado fresco en mezclas de concreto estructural con agregado de concreto reciclado
Autor(es): Eduardo Zapata. German Garcia.
Concreto Micro y Nanjo-adicionados de alta resistencia y alto módulo de Weibull con aplicación potencial en infraestructura víal
Autor(es): Eduardo Zapata.
Influencia de las fibras naturales sobre las propiedades mecánicas del concreto - revisión del tema
Autor(es): Eduardo Zapata. Ricardo Alfredo Cruz.
Rheological behavior between Portland cement type I and commercial silica fume
Autor(es): Eduardo Zapata.