The Experts below are selected from a list of 42045 Experts worldwide ranked by ideXlab platform

C Medina - One of the best experts on this subject based on the ideXlab platform.

  • carbonation of Concrete with construction and demolition waste based recycled aggregates and cement with recycled content
    Construction and Building Materials, 2020
    Co-Authors: I Saez F Del Bosque, M Sanchez I De Rojas, P Van Den Heede, N De Belie, C Medina
    Abstract:

    Abstract Durability is a major concern in Concrete (particularly recycled Concrete) structures exposed to carbonation-induced corrosion, given the social, economic, environmental and safety implications involved. This article explores carbonation performance in Concrete with 25% or 50% mixed recycled construction and demolition waste aggregate, alone or in conjunction with cement containing 25% fired clay construction and demolition waste. Irrespective of cement type, the mean carbonation depth was slightly greater in materials with 25% or 50% recycled aggregate than in Concretes with 100% natural aggregate, although the difference was not statistically significant for the 25% replacement ratio. In all the Concretes studied, the carbonation coefficient was below the 4 mm/yr0.5 indicative of good quality. Based on the prediction model proposed in Spain’s Concrete Code, reinforcement passivity was guaranteed in all these types of Concrete when exposed to class XC1 to XC4 carbonation environments for substantially longer than their 100 year design service life.

Juan Manuel Manso - One of the best experts on this subject based on the ideXlab platform.

  • durability studies on steelmaking slag Concretes
    Materials & Design, 2014
    Co-Authors: Idoia Arribas, Jose Tomas Sanjose, Iñigo Vegas, Juan Manuel Manso
    Abstract:

    Abstract Electric-arc furnace slag is proposed as a substitute for the conventional aggregate used in classical structural Concrete. In the present research is studied the durability of these slag aggregate Concretes and their resistance to both physical (freeze–thaw, high temperature and relative humidity) and chemical degradation (sulfate attack, alkali–aggregate reaction and marine environment), as well as their resistance to the corrosion of steel reinforcement bars (an assessment of the risks of corrosion) embedded in the Concrete matrix. This approach requires laboratory studies. The main objective of this work focuses on evaluating the durability of slag Concrete under the conditions specified in the Spanish structural Concrete Code. In general terms, the behavior of the Concrete with slag aggregate was similar to or better than the reference Concrete (natural aggregate), except in case of exposure to marine environments and seawater, which resulted in quicker chloride penetration. The study confirms the viability of producing steel-reinforced Concrete with slag aggregate.

I Saez F Del Bosque - One of the best experts on this subject based on the ideXlab platform.

  • carbonation of Concrete with construction and demolition waste based recycled aggregates and cement with recycled content
    Construction and Building Materials, 2020
    Co-Authors: I Saez F Del Bosque, M Sanchez I De Rojas, P Van Den Heede, N De Belie, C Medina
    Abstract:

    Abstract Durability is a major concern in Concrete (particularly recycled Concrete) structures exposed to carbonation-induced corrosion, given the social, economic, environmental and safety implications involved. This article explores carbonation performance in Concrete with 25% or 50% mixed recycled construction and demolition waste aggregate, alone or in conjunction with cement containing 25% fired clay construction and demolition waste. Irrespective of cement type, the mean carbonation depth was slightly greater in materials with 25% or 50% recycled aggregate than in Concretes with 100% natural aggregate, although the difference was not statistically significant for the 25% replacement ratio. In all the Concretes studied, the carbonation coefficient was below the 4 mm/yr0.5 indicative of good quality. Based on the prediction model proposed in Spain’s Concrete Code, reinforcement passivity was guaranteed in all these types of Concrete when exposed to class XC1 to XC4 carbonation environments for substantially longer than their 100 year design service life.

I Valverdeespinosa - One of the best experts on this subject based on the ideXlab platform.

  • characterization of recycled aggregates construction and demolition waste for Concrete production following the spanish structural Concrete Code ehe 08
    Construction and Building Materials, 2011
    Co-Authors: M Martinmorales, M Zamorano, A Ruizmoyano, I Valverdeespinosa
    Abstract:

    Abstract Construction and demolition waste can be used as recycled aggregate in construction. The more thoroughly the waste is treated, the higher the quality of the aggregate. However, high-quality aggregate is expensive, and thus, economically unviable in countries where natural aggregate is cheaply obtained. This paper examines the characteristics of recycled aggregate, resulting from of a non-exhaustive production process. This aggregate was found to contain impurities, such as crushed clay brick, crushed ceramic materials, and gypsum. The tests used to analyze this material were those recommended in the Spanish Structural Concrete Code (EHE-08). The results obtained were then compared with the guidelines in this Code, which regulate the use of this material as a component in structural Concrete. The result showed that none of the fractions fulfilled all the requirements in this especially in the case of the fulfillment of guidelines established to certain properties of the recycled aggregate, basically water absorption sulfate content, and chloride content. In contrast, particle shape, density, assessment of fines and resistance to fragmentation were in compliance with the EHE-08 recommendations.

N De Belie - One of the best experts on this subject based on the ideXlab platform.

  • carbonation of Concrete with construction and demolition waste based recycled aggregates and cement with recycled content
    Construction and Building Materials, 2020
    Co-Authors: I Saez F Del Bosque, M Sanchez I De Rojas, P Van Den Heede, N De Belie, C Medina
    Abstract:

    Abstract Durability is a major concern in Concrete (particularly recycled Concrete) structures exposed to carbonation-induced corrosion, given the social, economic, environmental and safety implications involved. This article explores carbonation performance in Concrete with 25% or 50% mixed recycled construction and demolition waste aggregate, alone or in conjunction with cement containing 25% fired clay construction and demolition waste. Irrespective of cement type, the mean carbonation depth was slightly greater in materials with 25% or 50% recycled aggregate than in Concretes with 100% natural aggregate, although the difference was not statistically significant for the 25% replacement ratio. In all the Concretes studied, the carbonation coefficient was below the 4 mm/yr0.5 indicative of good quality. Based on the prediction model proposed in Spain’s Concrete Code, reinforcement passivity was guaranteed in all these types of Concrete when exposed to class XC1 to XC4 carbonation environments for substantially longer than their 100 year design service life.

  • Carbonation of Concrete with construction and demolition waste based recycled aggregates and cement with recycled content
    'Elsevier BV', 2020
    Co-Authors: Sáez Del Bosque, Isabel F., N De Belie, Heede P. Van Den, Sánchez De Rojas, María Isabel, Medina César
    Abstract:

    Durability is a major concern in Concrete (particularly recycled Concrete) structures exposed to carbonation-induced corrosion, given the social, economic, environmental and safety implications involved. This article explores carbonation performance in Concrete with 25% or 50% mixed recycled construction and demolition waste aggregate, alone or in conjunction with cement containing 25% fired clay construction and demolition waste. Irrespective of cement type, the mean carbonation depth was slightly greater in materials with 25% or 50% recycled aggregate than in Concretes with 100% natural aggregate, although the difference was not statistically significant for the 25% replacement ratio. In all the Concretes studied, the carbonation coefficient was below the 4 mm/yr0.5 indicative of good quality. Based on the prediction model proposed in Spain’s Concrete Code, reinforcement passivity was guaranteed in all these types of Concrete when exposed to class XC1 to XC4 carbonation environments for substantially longer than their 100 year design service life.This study was funded under research projects BIA 2013-48876-C3-1-R, BIA2013-48876-C3-2-R and BIA2016-76643-C3-1-R awarded by the Ministry of Science and Innovation and grant GR 18122 awarded to the MATERIA Research Group by the Regional Government of Extremadura and the European Regional Development Fund, ERDF. In 2016 University of Extremadura teaching and research personnel benefitted from a mobility grant (MOV15A029) awarded by the Regional Government of Extremadura and in 2018 from a José Castillejo (CAS17/00313) scholarship granted by the Spanish Ministry of Education, Culture and Sport. Philip Van den Heede is since October 2017 a postdoctoral fellow of the Research Foundation—Flanders (FWO) (project number 3E013917) and acknowledges its support.Peer reviewe