Next Article in Journal
Electricity Recovery from Municipal Sewage Wastewater Using a Hydrogel Complex Composed of Microbially Reduced Graphene Oxide and Sludge
Next Article in Special Issue
Preparation and Properties of Alkali Activated Metakaolin-Based Geopolymer
Previous Article in Journal
A Facile in Situ and UV Printing Process for Bioinspired Self-Cleaning Surfaces
Previous Article in Special Issue
Development of Paper Sludge Ash-Based Geopolymer and Application to Treatment of Hazardous Water Contaminated with Radioisotopes
Article Menu
Issue 9 (September) cover image

Export Article

Open AccessArticle
Materials 2016, 9(9), 739; doi:10.3390/ma9090739

Experimental Study on Full-Scale Beams Made by Reinforced Alkali Activated Concrete Undergoing Flexure

DICATAM—Department of Civil Engineering, Architecture, Environment, Land Planning and Mathematics, University of Brescia, 25123 Brescia, Italy
*
Author to whom correspondence should be addressed.
Academic Editors: Arie van Riessen and Claudio Ferone
Received: 15 May 2016 / Revised: 24 July 2016 / Accepted: 22 August 2016 / Published: 30 August 2016
(This article belongs to the Special Issue Advances in Geopolymers and Alkali-Activated Materials)
View Full-Text   |   Download PDF [4614 KB, uploaded 30 August 2016]   |  

Abstract

Alkali Activated Concrete (AAC) is an alternative kind of concrete that uses fly ash as a total replacement of Portland cement. Fly ash combined with alkaline solution and cured at high temperature reacts to form a binder. Four point bending tests on two full scale beams made with AAC are described in this paper. Companion small material specimens were also casted with the aim of properly characterizing this new tailored material. The beam’s length was 5000 mm and the cross section was 200 mm × 300 mm. The AAC consisted of fly ash, water, sand 0–4 mm and coarse aggregate 6–10 mm; and the alkaline solution consisted of sodium hydroxide mixed with sodium silicate. No cement was utilized. The maximum aggregate size was 10 mm; fly ash was type F, containing a maximum calcium content of 2%. After a rest period of two days, the beam was cured at 60 °C for 24 h. Data collected and critically discussed included beam deflection, crack patterns, compressive and flexural strength and elastic modulus. Results show how AAC behavior is comparable with Ordinary Portland Cement (OPC) based materials. Nonlinear numerical analyses are finally reported, promoting a better understanding of the structural response. View Full-Text
Keywords: alkali activated concrete; fly ash; geopolymer concrete; material characterization; structural characterization alkali activated concrete; fly ash; geopolymer concrete; material characterization; structural characterization
Figures

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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

Monfardini, L.; Minelli, F. Experimental Study on Full-Scale Beams Made by Reinforced Alkali Activated Concrete Undergoing Flexure. Materials 2016, 9, 739.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

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