Effect of micro-sized silica aerogel on the properties of lightweight cement composite

Shah, Syed Nasir and Mo, Kim Hung and Yap, Soon Poh and Radwan, Mohammed K. H. (2021) Effect of micro-sized silica aerogel on the properties of lightweight cement composite. Construction and Building Materials, 290. ISSN 0950-0618, DOI https://doi.org/10.1016/j.conbuildmat.2021.123229.

Full text not available from this repository.

Abstract

Lightweight cement composite (LCC) has gained more interest and is increasingly explored by researchers due to its many advantageous properties. Silica aerogel (SA), a synthetic ultralight material, has a nano-porous structure, making it a potential option to be incorporated for LCC. Thus, this research intends to assess the influence of micro-sized SA fines on the properties of cement composite. Specifically, its effect on fresh state properties, porosity, density, compressive strength, rate of water absorption, total water absorption, wettability, and softening coefficient was investigated. The lightweight and micro-size of SA reduced the consistency and slump (up to 90%) of the fresh LCC. Besides that, its hydrophobic nature produced macropores which doubled the porosity in the cement composite. This resulted decrease in density (up to 35%), compressive strength (up to 76%), wettability (up to 21%), and softening coefficient (up to 33%). Water transport properties such as water absorption and rate of water absorption were also increased due to the formation of macropores in the SA cement composite. However, compared to some other LCCs, the cement composite produced with the SA fines in this study in overall exhibited good specific strength. (c) 2021 Elsevier Ltd. All rights reserved.

Item Type: Article
Funders: UNSPECIFIED
Uncontrolled Keywords: Micro-sized silica aerogel; Lightweight fines; Lightweight cement composite; Sorption properties; Specific strength
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering > Department of Civil Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 28 Feb 2022 06:35
Last Modified: 28 Feb 2022 06:35
URI: http://eprints.um.edu.my/id/eprint/26417

Actions (login required)

View Item View Item