Durability of Cement and Ash Mortars with Fluidized and Siliceous Fly Ashes Exposed to HCl Acid Environment over a Period of 2 Years

Janowska-Renkas, Elżbieta; Kaliciak, Agnieszka; Janus, Grzegorz; Kowalska, Jolanta

doi:10.3390/ma14123229

Submit to this Journal Review for this Journal Edit a Special Issue

Article Menu

...

Open AccessArticle

Durability of Cement and Ash Mortars with Fluidized and Siliceous Fly Ashes Exposed to HCl Acid Environment over a Period of 2 Years

Elżbieta Janowska-Renkas

Agnieszka Kaliciak

Grzegorz Janus

and

Jolanta Kowalska

Faculty of Civil Engineering and Architecture, Opole University of Technology, Katowicka Str. 48, 45-061 Opole, Poland

Author to whom correspondence should be addressed.

Academic Editor: Hyeong-Ki Kim

Materials 2021, 14(12), 3229; https://doi.org/10.3390/ma14123229

Received: 4 May 2021 / Revised: 2 June 2021 / Accepted: 7 June 2021 / Published: 11 June 2021

(This article belongs to the Special Issue Research on Novel Sustainable Binders, Concretes and Composites)

View Full-Text Download PDF

Browse Figures

Citation Export

Abstract

The paper presents results of research on the impact of fly ash from fluidized bed combustion (FBC) of lignite, used in quantities of 30 and 45% by mass, and the mixture of FBC and silicious fly ash in amount of 45% by mass, on properties of cement–ash mortars. Mortars were exposed to aggressive environment of 1, 3, and 5% HCl solutions for 2 years. Mortars containing 45% FBC exposed to 1% HCl solution (pH = 2) showed the highest durability from among other mortars. The growth of their strength observed after 90 days of testing in 1% HCl environment, as well as the lowest drop of strength after 730 days of exposure to this environment, resulted from the reduced amount of large pores from 20 to 200 nm in mortars containing fly ash, with simultaneous growth of smaller pores of <20 nm during testing. A beneficial effect has been demonstrated of FBC addition to cement on properties of cement–ash mortars exposed to the aggressive impact of the HCl. Mortars with FBC fly-ash content increased to 45% by mass showed higher strength values, smaller differences in linear and mass changes, and increased durability in an aggressive environment observed during 730 days of testing. View Full-Text

Keywords: fly ash from fluidized bed combustion (FBC); siliceous fly ash (FA); cement–ash mortars; pozzolanic activity; hydration heat; compressive strength; linear and mass changes; porosity

▼ Show Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

Share and Cite

MDPI and ACS Style

Janowska-Renkas, E.; Kaliciak, A.; Janus, G.; Kowalska, J. Durability of Cement and Ash Mortars with Fluidized and Siliceous Fly Ashes Exposed to HCl Acid Environment over a Period of 2 Years. Materials 2021, 14, 3229. https://doi.org/10.3390/ma14123229

AMA Style

Janowska-Renkas E, Kaliciak A, Janus G, Kowalska J. Durability of Cement and Ash Mortars with Fluidized and Siliceous Fly Ashes Exposed to HCl Acid Environment over a Period of 2 Years. Materials. 2021; 14(12):3229. https://doi.org/10.3390/ma14123229

Chicago/Turabian Style

Janowska-Renkas, Elżbieta, Agnieszka Kaliciak, Grzegorz Janus, and Jolanta Kowalska. 2021. "Durability of Cement and Ash Mortars with Fluidized and Siliceous Fly Ashes Exposed to HCl Acid Environment over a Period of 2 Years" Materials 14, no. 12: 3229. https://doi.org/10.3390/ma14123229

Find Other Styles

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Metrics

Abstract views Pdf views Html views

Article Menu

Durability of Cement and Ash Mortars with Fluidized and Siliceous Fly Ashes Exposed to HCl Acid Environment over a Period of 2 Years

Abstract

Share and Cite

Article Metrics

Article Access Statistics

Article Access Map by Country/Region

Further Information

Guidelines

MDPI Initiatives

Follow MDPI