Next Article in Journal
The Influence of Deposition Methods of Support Layer on Cordierite Substrate on the Characteristics of a MnO2–NiO–Co3O4/Ce0.2Zr0.8O2/Cordierite Three Way Catalyst
Next Article in Special Issue
Microstructural Analysis and Rheological Modeling of Asphalt Mixtures Containing Recycled Asphalt Materials
Previous Article in Journal
Synthesis and Thermal Properties of Acrylonitrile/Butyl Acrylate/Fumaronitrile and Acrylonitrile/Ethyl Hexyl Acrylate/Fumaronitrile Terpolymers as a Potential Precursor for Carbon Fiber
Previous Article in Special Issue
Life Cycle Assessment of Completely Recyclable Concrete
Article Menu

Export Article

Open AccessArticle
Materials 2014, 7(9), 6224-6236; doi:10.3390/ma7096224

Pre-Saturation Technique of the Recycled Aggregates: Solution to the Water Absorption Drawback in the Recycled Concrete Manufacture

Superior and Technical School of Agricultural Engineering, University of Leon, Avenida de Portugal 41, 24071 Leon, Spain
This article is an extended version of a Conference Paper titled “Presaturation of recycled aggregates from construction and demolition waste in the eco-efficient concrete manufacture” presented at the VI Congreso Internacional de Estructuras.
*
Author to whom correspondence should be addressed.
Received: 18 June 2014 / Revised: 20 August 2014 / Accepted: 27 August 2014 / Published: 1 September 2014
(This article belongs to the Special Issue Recycled Materials)
View Full-Text   |   Download PDF [866 KB, uploaded 1 September 2014]   |  

Abstract

The replacement of natural aggregates by recycled aggregates in the concrete manufacturing has been spreading worldwide as a recycling method to counteract the large amount of construction and demolition waste. Although legislation in this field is still not well developed, many investigations demonstrate the possibilities of success of this trend given that concrete with satisfactory mechanical and durability properties could be achieved. However, recycled aggregates present a low quality compared to natural aggregates, the water absorption being their main drawback. When used untreated in concrete mix, the recycled aggregate absorb part of the water initially calculated for the cement hydration, which will adversely affect some characteristics of the recycled concrete. This article seeks to demonstrate that the technique of pre-saturation is able to solve the aforementioned problem. In order to do so, the water absorption of the aggregates was tested to determine the necessary period of soaking to bring the recycled aggregates into a state of suitable humidity for their incorporation into the mixture. Moreover, several concrete mixes were made with different replacement percentages of natural aggregate and various periods of pre-saturation. The consistency and compressive strength of the concrete mixes were tested to verify the feasibility of the proposed technique. View Full-Text
Keywords: construction and demolition waste; compressive strength; slump test; moisture state of recycled coarse aggregate construction and demolition waste; compressive strength; slump test; moisture state of recycled coarse aggregate
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

García-González, J.; Rodríguez-Robles, D.; Juan-Valdés, A.; Morán-del Pozo, J.M.; Guerra-Romero, M.I. Pre-Saturation Technique of the Recycled Aggregates: Solution to the Water Absorption Drawback in the Recycled Concrete Manufacture. Materials 2014, 7, 6224-6236.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top