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Porous alkali activated materials with slow alkali release dynamic. Role of composition

Author(s):

Medium: journal article
Language(s): Spanish
Published in: Materiales de Construccion, , n. 329, v. 68
Page(s): 145
DOI: 10.3989/mc.2018.14016
Abstract:

Alkali activated materials (AAM) based on calcined metakaolin or illite clay together with waste by-products, such as waste glass or aluminium scrap recycling waste, were tested as value-added materials for pH stabilization in biogas technology where decrease of pH should be avoided. Porous materials with ability to slowly leach alkalis in the water media thus providing continuous control of the pH level were obtained. XRD, FTIR, SEM and titration methods were used to characterize AAM and their leaching properties. It is clear that composition of the material has an important effect on the diffusion of alkali from structure. Namely, higher Si/Al and Na/Al molar ratios may increase pore solution transfer to the leachate. The leaching rate of alkalis from the structure of AAM is high for the first few days, decreasing over time. It was possible to calculate the buffer capacity from the mixture design of AAM.

Structurae cannot make the full text of this publication available at this time. The full text can be accessed through the publisher via the DOI: 10.3989/mc.2018.14016.
  • About this
    data sheet
  • Reference-ID
    10516938
  • Published on:
    10/12/2020
  • Last updated on:
    19/02/2021
 
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