Výsledky vyhledávání - "Rafael Andres Robayo Salazar"

Akademický článek

Los residuos de la construcción y demolición en la ciudad de Cali: un análisis hacia su gestión, manejo y aprovechamiento

Autor: Rafael Andres Robayo Salazar, Pedro Enrique Mattey Centeno, Yimmy Fernando Silva Urrego, Diana Marcela Burgos Galindo, Silvio Delvasto Arjona

Publikováno v: Tecnura, Vol 19, Iss 44, Pp 157-170 (2015)

El número de obras de construcción, remodelación y demolición en las ciudades colombianas aumenta de manera constante como consecuencia del crecimiento y desarrollo socioeconómico de la población urbana. Sin embargo, estas prácticas generan gr

Externí odkaz: https://doaj.org/article/002eec0c9aa04d6eb5f492542511e636

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Akademický článek

Diseño, construcción y prueba estática experimental de un motor-cohete de combustible solido

Autor: Rafael Andres Robayo-Salazar, Julián Portocarrero-Hermann, Juan Meneses-Suta, Jonathan Salgado-Díaz, Sergio Martínez-Riaño, Fernando Delgado, Andrea Gómez-Ruge

Publikováno v: Revista UIS Ingenierías, Vol 20, Iss 2 (2021)

Este artículo presenta el diseño, construcción y prueba estática de un prototipo de motor cohete propulsado por combustible sólido tipo Candy. El diseño se basó en la metodología SRM (Solid Rocket Motor Design). El motor cohete incluyó el si

Externí odkaz: https://doaj.org/article/74025e1414904cea89109cf80bac65eb

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Reuse of Powders and Recycled Aggregates from Mixed Construction and Demolition Waste in Alkali-Activated Materials and Precast Concrete Units

Autor: RUBY MEJIA DE GUTIERREZ, Rafael Andres Robayo Salazar, William Valencia Saavedra

Publikováno v: Sustainability; Volume 14; Issue 15; Pages: 9685

This article describes the recycling of coarse and fine fractions and powder from construction and demolition waste (CDW) using alkaline activation technology (geopolymerization). The CDW sample used corresponds to a mixture (mixed waste) of concrete

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f20ea780c20f0cd3d3611385f9494f85

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Ablative Composites of Polymeric Matrix (Polyester Resin) Reinforced With Industrial Residue Materials and Fiberglass

Autor: Julián Portocarrero Hermann, John Darío Osorio, Rafael Andres Robayo-Salazar

Publikováno v: Revista Ingenierías Universidad de Medellín, Volume: 19, Issue: 36, Pages: 223-237, Published: 02 SEP 2021
Revista Ingenierías Universidad de Medellín, Vol 19, Iss 36, Pp 223-237 (2020)

Resumen Los materiales ablativos son la base de los sistemas de protección térmica de equipos o elementos recuperables que, en servicio, son expuestos a elevadas temperaturas. Generalmente, estos materiales son de difícil adquisición y alto costo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8f4c61e6e0e67b640c40b19c347f3884
http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S1692-33242020000100223&lng=en&tlng=en

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Natural Volcanic Pozzolan-and Granulated Blast Furnace Slag-Based Alkali-Activated Repair Mortar

Autor: Carlos M. G. Jesus, R. de Gutierrez, Fernando Pacheco-Torgal, Rafael Andres Robayo-Salazar

Publikováno v: Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP

An alkali-activated binary mortar (AABM) was studied as a possible alternative to traditional surface protection systems (coatings) or repair materials. A natural volcanic pozzolan (70%) and a granulated blast furnace slag (30%) were employed as prec

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::85b57c6e3a16600393ba90685441106a
https://doi.org/10.18178/ijscer.8.4.340-344

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Eco-House Prototype Constructed with Alkali-Activated Blocks: Material Production, Characterization, Design, Construction, and Environmental Impact

Autor: Sandra Ramírez-Benavides, William Valencia-Saavedra, Armando Orobio, Ruby Mejía de Gutiérrez, Rafael Andres Robayo-Salazar

Publikováno v: Materials
Volume 14
Issue 5
Materials, Vol 14, Iss 1275, p 1275 (2021)

The interest of the construction industry in alkali-activated materials has increased to the extent that these materials are recognized as alternatives to ordinary Portland cement-based materials in the quest for sustainable construction. This articl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::db571b317d657e6cbc2d84c0bc4229c7
https://pubmed.ncbi.nlm.nih.gov/33800181

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Phosphoric acid activation of volcanic ashes: Influence of the molar ratio R = (MgO + CaO) / P2O5 on reactivity of volcanic ash and strength of obtained cementitious material

Autor: Antoine Elimbi, Martin Cyr, Jean Aimé Mbey, Rafael Andres Robayo-Salazar, R. Mejía de Gutiérrez, Jean Baenla, B.I. Djon Li Ndjock

Publikováno v: Journal of Building Engineering
Journal of Building Engineering, Elsevier, 2021, 33, pp.101879. ⟨10.1016/j.jobe.2020.101879⟩
Journal of Building Engineering, 2021, 33, pp.101879. ⟨10.1016/j.jobe.2020.101879⟩

Generally, the phosphoric acid-activated systems use aluminosilicates as raw material (e.g., metakaolin); and the addition of alkali metals (e.g., Mg or Ca) contributes to obtain best properties. Volcanic ash (Va) is an aluminosilicate globally avail

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::af8e384ee8de539f1e9c47a12b0f4866
https://hal.insa-toulouse.fr/hal-03123627

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Recycling of concrete, ceramic, and masonry waste via alkaline activation: Obtaining and characterization of hybrid cements

Autor: William Valencia-Saavedra, Ruby Mejía de Gutiérrez, Rafael Andres Robayo-Salazar

Publikováno v: Journal of Building Engineering. 46:103698

This research aims to obtain and characterize alkali-activated hybrid cements based on concrete (Co), ceramic (Ce), and/or masonry (M) waste powders from crushed construction and demolition waste (CDW). Hydrated lime (Ca(OH)2) and ordinary Portland c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3833e7b992a7dfc1f9f63d34d0587e85
https://doi.org/10.1016/j.jobe.2021.103698

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Alkali-Activated Concrete Based on Natural Volcanic Pozzolan: Chemical Resistance to Sulfate Attack

Autor: Patricia Aragón, Ruby Mejía de Gutiérrez, Rafael Andres Robayo-Salazar

Publikováno v: Journal of Materials in Civil Engineering. 32

In this article, a comparative analysis of the sulfate resistance (Na2SO4 and MgSO4) of an alkali-activated binary concrete (AABC) (70% natural volcanic pozzolan and 30% granulated blast-fu...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::842d51d2ce42de4115ed87e17761c482
https://doi.org/10.1061/(asce)mt.1943-5533.0003161

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Natural volcanic pozzolans as an available raw material for alkali-activated materials in the foreseeable future: A review

Autor: Ruby Mejía de Gutiérrez, Rafael Andres Robayo-Salazar

Publikováno v: Construction and Building Materials. 189:109-118

Alkali-activated materials (AAM) represent a line of research of great interest around the world as a real alternative to replace Portland cement (OPC). Despite this global interest, it is believed that current and future research should focus on ove

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4beccabe4813be43a68e11aa40e04c4e
https://doi.org/10.1016/j.conbuildmat.2018.08.174

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