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Open AccessArticle

Alkali Activated Paste and Concrete Based on of Biomass Bottom Ash with Phosphogypsum

1
Faculty of Civil Engineering and Architecture, Kaunas University of Technology, LT-44249 Kaunas, Lithuania
2
Faculty of Electrical and Electronics Engineering, Kaunas University of Technology, Studentu St. 48, LT-51367 Kaunas, Lithuania
3
Faculty of Chemical Technology, Kaunas University of Technology, Radvilėnų Pl. 19, LT-50254 Kaunas, Lithuania
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(15), 5190; https://doi.org/10.3390/app10155190
Received: 9 July 2020 / Revised: 23 July 2020 / Accepted: 24 July 2020 / Published: 28 July 2020
(This article belongs to the Special Issue High-Performance Eco-Efficient Concrete)
There is a growing interest in the development of new cementitious binders for building construction activities. In this study, biomass bottom ash (BBA) was used as aluminosilicate precursor and phosphogypsum (PG) was used as a calcium source. The mixtures of BBA and PG were activated with the sodium hydroxide solution or the mixture of sodium hydroxide solution and sodium silicate hydrate solution. Alkali activated binders were investigated using X-ray powder diffraction (XRD), X-ray fluorescence (XRF) and scanning electron microscopy (SEM) test methods. The compressive strength of hardened paste and fine-grained concrete was also evaluated. After 28 days, the highest compressive strength reached 30.0 MPa—when the BBA was substituted with 15% PG and activated with NaOH solution—which is 14 MPa more than control sample. In addition, BBA fine-grained concrete samples based on BBA with 15% PG substitute activated with NaOH/Na2SiO3 solution showed higher compressive strength compered to when NaOH activator was used −15.4 MPa and 12.9 MPa respectfully. The NaOH/Na2SiO3 activator solution resulted reduced open porosity, so potentially the fine-grained concrete resistance to freeze and thaw increased. View Full-Text
Keywords: biomass bottom ash; phosphogypsum; alkali activated fine-grained concrete biomass bottom ash; phosphogypsum; alkali activated fine-grained concrete
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MDPI and ACS Style

Vaičiukynienė, D.; Nizevičienė, D.; Kantautas, A.; Bocullo, V.; Kielė, A. Alkali Activated Paste and Concrete Based on of Biomass Bottom Ash with Phosphogypsum. Appl. Sci. 2020, 10, 5190. https://doi.org/10.3390/app10155190

AMA Style

Vaičiukynienė D, Nizevičienė D, Kantautas A, Bocullo V, Kielė A. Alkali Activated Paste and Concrete Based on of Biomass Bottom Ash with Phosphogypsum. Applied Sciences. 2020; 10(15):5190. https://doi.org/10.3390/app10155190

Chicago/Turabian Style

Vaičiukynienė, Danutė; Nizevičienė, Dalia; Kantautas, Aras; Bocullo, Vytautas; Kielė, Andrius. 2020. "Alkali Activated Paste and Concrete Based on of Biomass Bottom Ash with Phosphogypsum" Appl. Sci. 10, no. 15: 5190. https://doi.org/10.3390/app10155190

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