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Partial replacement of metakaolin with red ceramic waste in geopolymer

IR@CGCRI: CSIR-Central Glass and Ceramic Research Institute, Kolkata

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Title Partial replacement of metakaolin with red ceramic waste in geopolymer
 
Creator Sarkar, Madhuchhanda
Dana, Kausik
 
Subject Refractories
 
Description Metakaolin was incrementally replaced (33.3%, 50% and 66.6%) by red ceramic waste in geopolymer formulation to study the effect on geopolymerisation and its resultant properties. The geopolymer binders composed of two calcined aluminosilicates (viz. Metakaolin and Red ceramic waste), NaOH and sodium silicate. In the experimental compositions, metakaolin was replaced gradually up to 66.6% in the clay fraction, the Si/Al increased from 3.36 to 5.16 and Na/Al increased from 0.93 to 1.38. The FTIR spectroscopic studies of geopolymer pastes along with XRD analysis indicated that the red ceramic waste partly reacts with alkali and takes part in geopolymer formation. Replacement of 33.3% metakaolin by the red ceramic waste in geopolymer binder did not reduce the compressive strength with respect to the pure metakaolin geopolymer here. Additional replacement resulted in a drastic decrease in the compressive strength of the geopolymer binder. However, the compressive strength of geopolymer mortars revealed interesting synergy between the amount of binder and particle packing in the mortar. Despite having a lower amount of binder phase, mortars with 33% and 50% red ceramic waste exhibited maximum compressive strength values. This has been attributed to improved particle packing through incorporation of red ceramic waste particles.
 
Publisher Elsevier
 
Date 2021-02
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://cgcri.csircentral.net/5217/1/sarkar.pdf
Sarkar, Madhuchhanda and Dana, Kausik (2021) Partial replacement of metakaolin with red ceramic waste in geopolymer. Ceramics International, 47 (3). pp. 3473-3483. ISSN 0272-8842
 
Relation http://cgcri.csircentral.net/5217/