Download Alkali Activated Materials: State-of-the-Art Report, RILEM by John L. Provis, Jannie S. J. van Deventer PDF

By John L. Provis, Jannie S. J. van Deventer

This is a cutting-edge file because of the paintings of RILEM Technical Committee 224-AAM within the interval 2007-2013. The document summarises learn up to now within the region of alkali-activated binders and concretes, with a specific concentrate on the subsequent parts: binder layout and characterisation, toughness checking out, commercialisation, standardisation, and supplying a ancient context for this rapidly-growing learn field.

Show description

Read Online or Download Alkali Activated Materials: State-of-the-Art Report, RILEM TC 224-AAM PDF

Best structural books

BS 8110-1: 1997: Structural use of concrete - Part 1: Code of practice for design and construction

This a part of BS 8110 offers ideas for the structural use of concrete in structures and buildings, except bridges and structural concrete made with excessive alumina cement. The innovations for robustness were ready at the assumption that each one load-bearing parts, e. g. slabs, columns and partitions are of concrete.

Energy Geostructures

Strength geostructures are a massive innovation within the box of starting place engineering and are spreading speedily through the global. they permit the procurement of a renewable and fresh resource of power which are used for heating and cooling structures. This expertise the structural position of geostructures with the power provide, utilizing the main of shallow geothermal strength.

Smart Composites Mechanics and Design

Clever Composites: Mechanics and layout addresses the present development within the mechanics and layout of shrewdpermanent composites and multifunctional buildings. Divided into 3 elements, it covers characterization of homes, analyses, and layout of varied complicated composite fabric structures with an emphasis at the coupled mechanical and non-mechanical behaviors.

Extra resources for Alkali Activated Materials: State-of-the-Art Report, RILEM TC 224-AAM

Example text

Infrared spectroscopy has also been applied [96–98], but the interpretation of spectral features does not always correlate well with the results of NMR experiments. In the context of geopolymerisation, the most important aspect of the existence of a distribution of silicate species is the variability in lability (and thus also reactivity) between the different species present. Operating in parallel with the effects of silicate oligomer formation in concentrated solutions are acid-base reactions; monomeric silica, Si(OH)4, is also known as ‘orthosilicic acid,’ and behaves as a polyprotic weak acid under alkaline conditions.

This provides a wealth of potential precursors for alkali activation, although suitable methods of treatment and industrial-scale production must still be developed. Chinese research has made extensive use of fly ash, blast furnace and phosphorus slags, metakaolin and other calcined clays, red mud, and coal gangues in alkali activation, in addition to development work in the areas of admixtures and fundamental chemistry applicable to many of these systems. The reuse of industrial solid waste in China is encouraged by government and taxation policy [159, 160]; products in which the content of industrial solid waste (excluding BFS) is more than 30 % are able to be sold tax-free [155].

L. Provis et al. 26 Fig. 3 Crystallisation isotherms for hydrated sodium metasilicate phases at 25 °C and ambient pressure, plotted from the tabulated data of Wills [86]. The phase Na3HSiO4·5H2O, which is reported at relatively high Na2O and low SiO2 concentrations, is not depicted (Plot adapted from [76]) of hydroxide solutions, where the excess alkali reacts with atmospheric CO2. This is unsightly, but not always harmful to the structural integrity of the material. Efflorescence is generally more marked in the presence of Na than K in hydroxideactivated binders.

Download PDF sample

Rated 4.09 of 5 – based on 5 votes