The use of different by-products in the production of lightweight alkali activated building materials

Dembovska, Laura; Bajāre, Diāna; Ducman, Vilma; Korat, Lidija; Būmanis, Ģirts

doi:10.1016/j.conbuildmat.2017.01.005

Cited by 54 publications

(30 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…AAM FCs were also successfully prepared with a mix of FA and GGBS [22,23] and some were made with MK [24,25] or GGBS [26,27] but none have been made with blended MK-GGBS binder. The vast majority of AAM FCs are produced with the gas-foaming method [15][16][17][18][19]21,24,25,[27][28][29].…”

Section: Graphical Abstract 1 Introductionmentioning

confidence: 99%

Thermomechanical performance of blended metakaolin-GGBS alkali-activated foam concrete

Samson

Cyr

Gao

2017

Construction and Building Materials

View full text Add to dashboard Cite

This study aims to synthetize, at ambient temperature, blended metakaolin-ground granulated blast furnace slag (MK-GGBS) foam concrete (FC) presenting good thermomechanical performance for use as self-bearing insulation material. First, a binder composition that could be used for MK-GGBS FC production was identified. Fourteen paste formulations were produced and analysed to determine the best proportions of MK, GGBS and activator to be used in an alkali-activated material (AAM) FC matrix. Certain requirements were specified for the fresh paste (initial setting time > 180 minutes) and solid materials (high compressive strength and moderate shrinkage) to be used for FC production. The optimized mix was then employed for AAM FC production by using an H 2 O 2 blowing agent (gasfoaming method). The influence of two main parameters (H 2 O 2 and surfactant contents) on AAM FC properties (density, porous structure, thermal conductivity and compressive strength) were investigated. The thermomechanical performances of the AAM FCs produced were good compared to FC performances found in the literature. FC density mostly depends on H 2 O 2 content. The FC porous structure depends strongly on both H 2 O 2 and surfactant contents. High surfactant content FCs have a thin homogenous porous structure. At constant density, FC compressive strength depends on the surfactant content. An optimized surfactant content maximizing FC compressive strength at constant density was identified. Highlights  Optimized proportions between metakaolin, GGBS and activator were identified.  H 2 O 2 gas-off lasts 180 minutes. AAMs paste initial setting time must start after.  Lightweight AAMs were obtained with density from 264 to 480 kg/m 3.  The foam concrete porous structure depends on both H 2 O 2 and surfactant contents.  An optimized surfactant content (0.004%) maximized FC compressive strength.

show abstract

Section: Graphical Abstract 1 Introductionmentioning

confidence: 99%

Thermomechanical performance of blended metakaolin-GGBS alkali-activated foam concrete

Samson

Cyr

Gao

2017

Construction and Building Materials

View full text Add to dashboard Cite

show abstract

“…In order to achieve this purpose, it is possible to replace (totally or partially) natural aggregates with recycled aggregates (e.g., fly ash (FA), blast furnace slag, and murble sludge) [10][11][12][13][14]). Also, complete replacement of cement with alkali-activated binders can be another option [15][16][17]; and still another option could be to replace cement with recycled fibers [18,19].…”

Section: Introductionmentioning

confidence: 99%

Life Cycle Assessment (LCA) of Different Kinds of Concrete Containing Waste for Sustainable Construction

et al. 2018

View full text Add to dashboard Cite

Concrete production causes significant environmental damage during its entire life cycle due to the large consumption of natural aggregate. The aim of this research was to use the Life Cycle Assessment (LCA) methodology to conduct a comparative analysis of four different concrete mixtures, i.e., construction and demolition waste (CDW), incinerator ashes, marble sludge, and blast furnace slag. The LCA study was implemented in the Campania Region of Italy. The main contribution of the study was that it proposed the use of "green" recycled aggregates in concrete production in order to assess the reduction of potential adverse impacts, from both environmental and energy perspectives. SimaPro © software was used to conduct the analysis. The main results of the research showed that the recycled aggregates that were analyzed were preferable to traditional concrete. In particular, the recycled aggregate that had the least adverse impact on the environment was blast furnace waste.

show abstract

“…Data from [51] served to create a carbonation coefficient k/k 0.5 model using water/binder ratio and slag content in binder as a sum of products of two linear functions, representing GGBS content in the binder g/b and w/b Equation (20), Equation (21). The calculation method for R carb is the same as in Equation (19).…”

Section: Ggbs Additivementioning

confidence: 99%

“…At the same time, studies have shown that the increase in the water-binder ratio results in a linear increase in the k value. Based on data from mentioned studies, the authors proposed a model determining the carbonation coefficient k/k0.5 Equation (17), Equation (18) as a sum of products of two linear functions, representing fly ash content in the binder and w/b and the calculation method for Rcarb Equation (19). …”

Section: Fly Ash Additivementioning

confidence: 99%

See 1 more Smart Citation

Sustainable Concrete Performance—CO2-Emission

Latawiec¹,

Woyciechowski

Kowalski

2018

Environments

View full text Add to dashboard Cite

Abstract:The balance of carbon dioxide emissions and other greenhouse gases in the life cycle of concrete is one of the important elements affecting the sustainable development of concrete technology. Modifications in the composition in the aim of minimization of so-called "carbon footprint" of concrete also affect the majority of its technical features, including primarily the mechanical properties and durability. The article presents a desirability function that would allow us to estimate the combined effect of the modification in terms of both CO 2 emissions and some of the technical features of the concrete. As criterial features equivalent CO 2 emission, compressive strength and susceptibility/resistance to concrete carbonation are selected. Selected features should be considered as an example for the presentation of the proposed methodology and represent the three pillars of concrete desirability in terms of sustainable development, i.e., the constructional usefulness, durability, and environmental performance.

show abstract

The use of different by-products in the production of lightweight alkali activated building materials

Cited by 54 publications

References 20 publications

Thermomechanical performance of blended metakaolin-GGBS alkali-activated foam concrete

Thermomechanical performance of blended metakaolin-GGBS alkali-activated foam concrete

Life Cycle Assessment (LCA) of Different Kinds of Concrete Containing Waste for Sustainable Construction

Sustainable Concrete Performance—CO2-Emission

Contact Info

Product

Resources

About