Permeation characteristics and impact factors of geopolymers made of kaolin

Ko, Ming Sheng; Chen, Hsing-Yen; Lyu, Syuan-Jhih; Wang, Tai‐Tien; Ueng, Tzuu-Hsing

doi:10.1016/j.conbuildmat.2015.05.121

Cited by 10 publications

(4 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, depending on the different application levels, a balance between the setting times, slump flow, compressive strength and the costs can be achieved by the incorporation of fly ash with an appropriate amount; as can be seen that desirable strengths with other similar properties are shown in samples with high fly ash contents. It should be noted that relatively high porosities of alkali activated materials are also reported in other previous researches [57][58][59][60], this is probably due to the relatively high physically bound water content (see Fig. 6) of this type of material by nature.…”

Section: Porositysupporting

confidence: 70%

Assessing the porosity and shrinkage of alkali activated slag-fly ash composites designed applying a packing model

Gao

Brouwers

2016

Construction and Building Materials

123

View full text Add to dashboard Cite

DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal.If the publication is distributed under the terms of Article 25fa of the Dutch Copyright Act, indicated by the "Taverne" license above, please follow below link for the End User Agreement:

show abstract

Section: Porositysupporting

confidence: 70%

Assessing the porosity and shrinkage of alkali activated slag-fly ash composites designed applying a packing model

Gao

Brouwers

2016

Construction and Building Materials

123

View full text Add to dashboard Cite

show abstract

“…Apart from total porosity, there was a more noticeable difference in pore size distribution. The higher l/s ratio of MK60 results in a shift of the pore size distribution towards bigger pores, which coincided with the results from the literature [ 57 , 58 ]. The biggest change could be observed for pores < 10 µm and in the range of 20 µm to 50 µm, where the shift was most pronounced.…”

Section: Resultssupporting

confidence: 91%

Evaluation of Sulfuric Acid-Induced Degradation of Potassium Silicate Activated Metakaolin Geopolymers by Semi-Quantitative SEM-EDX Analysis

et al. 2020

View full text Add to dashboard Cite

Geopolymers are synthesized by mixing powdery solids, rich in amorphous silicon and aluminum species, with an alkaline solution, which leads to the formation of an inorganic alumosilicate network. Their acid resistance is affected by the composition, the porosity, and pore size distribution of the hardened binder as well as the type and concentration of the acidic solution. In the present study, two geopolymer mixtures with varying liquid-to-solid ratios and Si/Al ratios were exposed to a sulfuric acid solution (pH = 1) and analyzed after different durations of exposure (7, 14, 28, 56, and 70 days) by using a light microscope and scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDX). SEM-EDX elemental mapping was used to evaluate the degradation from depth profiles of silicon (Si), aluminum (Al), and potassium (K) leaching. The results clearly show the leaching kinetics of potassium and the dealumination of the network. The separate consideration of specific reaction steps in the course of degradation, namely the depth of erosion (DE), the depth of deterioration (DD), and the depth of reaction for certain elements (DR(e)), indicate a combination of chemical and diffusion controlled degradation mechanisms.

show abstract

“…On the other hand, Zhang et al [106] and Nasvi et al [107,108] conducted measurements of permeability for AAS concrete and reported lower values than those for PC concrete. Similar findings were also reported by Ko et al [109].…”

Section: Permeability Coefficientsupporting

confidence: 92%

Characterisation of temporal variations of alkali-activated slag cement property using microstructure features and electrical responses

Zhu

Yang

et al. 2020

Construction and Building Materials

View full text Add to dashboard Cite

show abstract

Permeation characteristics and impact factors of geopolymers made of kaolin

Cited by 10 publications

References 25 publications

Assessing the porosity and shrinkage of alkali activated slag-fly ash composites designed applying a packing model

Assessing the porosity and shrinkage of alkali activated slag-fly ash composites designed applying a packing model

Evaluation of Sulfuric Acid-Induced Degradation of Potassium Silicate Activated Metakaolin Geopolymers by Semi-Quantitative SEM-EDX Analysis

Characterisation of temporal variations of alkali-activated slag cement property using microstructure features and electrical responses

Contact Info

Product

Resources

About