Particles size and distribution on the improvement of the mechanical performance of high strength solid solution based inorganic polymer composites

A microstructural approach

verfasst von

Achile Nana, Elie Kamseu, Ange Therese Akono, Jean Ngouné, Jean Noel Yankwa Djobo, Hervé Kouamo Tchakouté, Maria Chiara Bognozzi, Cristina Leonelli

Abstract

This research reports on the influence of particle size and distribution on the physical, mechanical and microstructural features of solid solutions (feldspathic materials) based inorganic polymer composites (IPCs). Both granite and pegmatite were ground to different degree of finess making four different granulometry with particles of 63, 80, 125 and 200 μm. The respective mixes receive 15 wt% of metakaolin and were activated with a well designed alkaline solution. Matrices obtained showed high compressive and flexural strengths in the range 101.2–131.3 MPa, and 29–35.5 MPa, respectively. It was observed that the optimum mechanical performance of these matrices can be achieved through a mix-design of different grades of granulometry. This was suggested by mechanism combining reactivity and particles packing. In fact, although it can be expected that the finess of the combination of the particles size under 63 μm might present the better reactivity, it is showing that the combination of fine, medium and coarse particles is efficient in achieving denser and tougher microstructure. Lower cumulative pore volume (17 mL g⁻¹) of the composites based on pegmatite, value not far from that of natural stones, resulted in a higher impact resistance of 3.03 J. It was concluded that designing the feldspathic rock-based composites with high strengths appear as sustainable, low energy consumption and environmentally-friendly materials for the structural construction.

Externe Organisation(en)

University of Dschang
Ministry of Scientific Research and Innovation-Cameroon
University of Modena and Reggio Emilia
Northwestern University
University of Yaounde I
Università di Bologna

Typ

Artikel

Journal

Materials chemistry and physics

Band

267

ISSN

0254-0584

Publikationsdatum

15.07.2021

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Allgemeine Materialwissenschaften, Physik der kondensierten Materie

Ziele für nachhaltige Entwicklung

SDG 7 – Erschwingliche und saubere Energie

Elektronische Version(en)

https://doi.org/10.1016/j.matchemphys.2021.124602 (Zugang: Geschlossen)