TY - JOUR

T1 - Innovative porous ceramic matrices from inorganic polymer composites (IPCs)

T2 - Microstructure and mechanical properties

AU - Nana, Achile

AU - Kaze, Rodrigue Cyriaque

AU - Alomayri, Thamer

AU - Hasan, Assaedi

AU - Nemaleu, Juvenal Giogetti Deutou

AU - Ngouné, Jean

AU - Tchakouté, Hervé K.

AU - Kamseu, E.

AU - Leonelli, C.

N1 - Funding Information: This project received the contribution of the Royal Society and the African Academy of Science through the funding FLAIR to Dr. Elie Kamseu. Grant; FLR\R1\201402. The authors are grateful to Ingessil S.r.l., Verona, Italy, for providing sodium silicate used for these investigations.

PY - 2021/3/1

Y1 - 2021/3/1

N2 - The thermal performance of pegmatite-based geopolymer composites is investigated. Dense and compact matrix was prepared replacing metakaolin with pegmatite in the range of 70–85 wt% and activate with sodium hydroxide/sodium silicate solution in 1:1 vol ratio. The products of geopolymerization, cured at room temperature for 28 days, were heated at 100, 200, 400, 600, 800, 900, 1000 and 1100 °C with 2 h soaking time. The high values of flexural strength (46–51 MPa) were observed at 1000 °C as the consequences of low porosity (173 mm 3/g) and water absorption (4.50–5.62%). The increase of the vitrification at 1100 °C enhanced the liquid phase and develop porosities responsible for reduction of strength. The mechanical properties, microstructural evolution and pore size distribution were found to be influenced by the amount of fine powder of pegmatite (solid solution).

AB - The thermal performance of pegmatite-based geopolymer composites is investigated. Dense and compact matrix was prepared replacing metakaolin with pegmatite in the range of 70–85 wt% and activate with sodium hydroxide/sodium silicate solution in 1:1 vol ratio. The products of geopolymerization, cured at room temperature for 28 days, were heated at 100, 200, 400, 600, 800, 900, 1000 and 1100 °C with 2 h soaking time. The high values of flexural strength (46–51 MPa) were observed at 1000 °C as the consequences of low porosity (173 mm 3/g) and water absorption (4.50–5.62%). The increase of the vitrification at 1100 °C enhanced the liquid phase and develop porosities responsible for reduction of strength. The mechanical properties, microstructural evolution and pore size distribution were found to be influenced by the amount of fine powder of pegmatite (solid solution).

KW - Pegmatite

KW - Mechanical strength

KW - Geopolymer composites

KW - Pore-size distribution

UR - http://www.scopus.com/inward/record.url?scp=85098088444&partnerID=8YFLogxK

U2 - 10.1016/j.conbuildmat.2020.122032

DO - 10.1016/j.conbuildmat.2020.122032

M3 - Article

VL - 273

JO - Construction and Building Materials

JF - Construction and Building Materials

SN - 0950-0618

M1 - 122032

ER -