Zobrazeno 1 - 10
of 16
pro vyhledávání: '"William Valencia Saavedra"'
Autor:
Armando Vargas-López, Walter Vásquez-Delgado, William Valencia-Saavedra, Ruby Mejía de Gutiérrez
Publikováno v:
Revista UIS Ingenierías, Vol 21, Iss 4 (2022)
Este artículo presenta un análisis de la caracterización físico-mecánica de un concreto geopolimérico fibrorreforzado, cuya matriz HCV está conformada por 90% ceniza volante (CV) y 10% cemento portland ordinario (OPC), utilizando como activado
Externí odkaz:
https://doaj.org/article/b961952d9d774e628900d06c343c2e9c
Publikováno v:
Molecules, Vol 27, Iss 16, p 5296 (2022)
Hybrid alkali-activated cements (HAACs), also known as cements with high percentages of alkali-activated supplementary materials, are alternative cements that combine the advantages of ordinary Portland cement (OPC) and alkali-activated systems. Thes
Externí odkaz:
https://doaj.org/article/d0347df8a92b436099068e0e0a441c6f
Publikováno v:
Molecules, Vol 26, Iss 24, p 7572 (2021)
This article demonstrates the possibility of producing alkali-activated hybrid cements based on fly ash (FA), and construction and demolition wastes (concrete waste, COW; ceramic waste, CEW; and masonry waste, MAW) using sodium sulfate (Na2SO4) (2–
Externí odkaz:
https://doaj.org/article/3c046bb8d6f84e2db2d3a18204478ecc
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
Publikováno v:
European Journal of Environmental and Civil Engineering. 26:3292-3312
This study investigates the carbonation behaviour of alkali-activated fly ash-based (AFA) concretes. AFA contains 20.67% of unburned carbon. GBFS and OPC were used as sources of calcium (20%). A mi...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::807582efc1661e44b19aa6dd2f4ada3d
https://doi.org/10.1080/19648189.2020.1785948
https://doi.org/10.1080/19648189.2020.1785948
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)
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
https://pubmed.ncbi.nlm.nih.gov/33800181
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
https://doi.org/10.1016/j.jobe.2021.103698
Publikováno v:
Molecules
Volume 25
Issue 15
Molecules, Vol 25, Iss 3389, p 3389 (2020)
Volume 25
Issue 15
Molecules, Vol 25, Iss 3389, p 3389 (2020)
The environmental impacts related to Portland cement production in terms of energy consumption, the massive use of natural resources and CO2 emissions have led to the search for alternative cementitious materials. Among these materials, alkali-activa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c75f68c5a6e0af39ca85fa5be41604cd
Publikováno v:
Ingeniería e Investigación, Vol 40, Iss 2, Pp 72-80 (2020)
Ingeniería e Investigación, Volume: 40, Issue: 2, Pages: 72-80, Published: 18 DEC 2020
Ingeniería e Investigación, Volume: 40, Issue: 2, Pages: 72-80, Published: 18 DEC 2020
Concretes based on alkali-activated binders have attracted considerable attention as new alternative construction materials, which can substitute Portland Cement (OPC) in several applications. These binders are obtained through the chemical reaction
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5d2bf00440bce6e58e890be2bb595ca8
https://doi.org/10.15446/ing.investig.v40n2.83893
https://doi.org/10.15446/ing.investig.v40n2.83893
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
instname
instname
The durability of Portland cement concrete, regardless of its composition, in presence of low-pH solutions is limited due to the dissolution and decomposition of the mineral phases of the hardened cement. For example, sewage systems are critical to p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3900726faaa0ba60acd6aa3438bbda73
http://hdl.handle.net/10261/219547
http://hdl.handle.net/10261/219547
