Articles
  • Na2CO3 effect on high-strength lightweight ceramsite prepared from demagnesium boron mud and oil shale semi-coke

  • T. Chena, L. Lianga,*, B. Dia and G. Gianb

  • aDepartment of Environmental Engineering, School of Resource and Civil Engineering, Northeastern University, Shenyang 110000
    bDepartment of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Macau, 999078 China

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

High-strength ceramsite was prepared by using demagnesium boron mud and oil shale (OS) semi-coke as the main raw materials, Na2SiO3 as binder, and Na2CO3 as foaming agent. In the ceramsite with a 1:1 ratio of demagnesium boron mud and OS semi-coke, 3% Na2SiO3, and 10% Na2CO3 sintered at 1070 oC, the porosity, apparent density, and compressive strength reached 22.63%, 1398.33 kg/m3 and 11.50 MPa, respectively. Na2CO3 played a decisive role in the sintering of high-strength ceramsite. Thermogravimetric analysis and X-ray diffraction results showed that the gas produced by raw meal during the heating process reduced the apparent density of ceramsite, and that new minerals such as albite and forsterite were produced during the firing process. The forsterite formed islands within an albite framework, thereby strengthening the ceramsite


Keywords: Demagnesium boron mud, ceramsite, apparent density, porosity, compressive strength

This Article

  • 2021; 22(6): 597-604

    Published on Dec 31, 2021

  • 10.36410/jcpr.2021.22.6.597
  • Received on Jan 27, 2021
  • Revised on May 22, 2021
  • Accepted on Jun 3, 2021

Correspondence to

  • L. Liang

  • Department of Environmental Engineering, School of Resource and Civil Engineering, Northeastern University, Shenyang 110000
    Tel : +86-18624058030 Fax: +86-024-83679128

  • E-mail: liliang@mail.neu.edu.cn