Preparation of aragonite whiskers by wet carbonation of wollastonite: Carbon mineralization behavior and its effect on cement properties

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F25%3A10258667" target="_blank" >RIV/61989100:27360/25:10258667 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0950061825037262" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0950061825037262</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.conbuildmat.2025.143575" target="_blank" >10.1016/j.conbuildmat.2025.143575</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Preparation of aragonite whiskers by wet carbonation of wollastonite: Carbon mineralization behavior and its effect on cement properties

Popis výsledku v původním jazyce

To preserve the original physical morphology of wollastonite and enhance its pozzolanic reactivity, this study systematically investigated the feasibility of preparing aragonite through the aqueous carbonation of wollastonite. The influences of MgCl2 concentration, temperature, and reaction duration on the mineralization behavior of wollastonite were analyzed. Furthermore, the effects of carbonated wollastonite on cement hydration and strength were evaluated. The results indicated that under optimal conditions (0.1 mol/L MgCl2, 80 degrees C), a carbonation degree of 25.31 % (COQ capture capacity of 8.28 g COQ/100 g wollastonite) was achieved after 6 h of carbonation. During this process, aragonite crystals with diameters of 0.2-0.5 mu m and lengths of 2-5 mu m were precipitated. Simultaneously, the dissolved silica phase underwent condensation, resulting in amorphous Ca-modified silica gel with a relatively high degree of polymerization. Additionally, when the incorporation of carbonated wollastonite ranged from 5 % to 15 %, it accelerated the cement reaction process and improved both the compressive strength and flexural strength of cement mortar. The research findings will provide support for enhancing the performance of cement-based building materials and promoting low-carbon development in the construction and building materials.

Název v anglickém jazyce

Preparation of aragonite whiskers by wet carbonation of wollastonite: Carbon mineralization behavior and its effect on cement properties

Popis výsledku anglicky

To preserve the original physical morphology of wollastonite and enhance its pozzolanic reactivity, this study systematically investigated the feasibility of preparing aragonite through the aqueous carbonation of wollastonite. The influences of MgCl2 concentration, temperature, and reaction duration on the mineralization behavior of wollastonite were analyzed. Furthermore, the effects of carbonated wollastonite on cement hydration and strength were evaluated. The results indicated that under optimal conditions (0.1 mol/L MgCl2, 80 degrees C), a carbonation degree of 25.31 % (COQ capture capacity of 8.28 g COQ/100 g wollastonite) was achieved after 6 h of carbonation. During this process, aragonite crystals with diameters of 0.2-0.5 mu m and lengths of 2-5 mu m were precipitated. Simultaneously, the dissolved silica phase underwent condensation, resulting in amorphous Ca-modified silica gel with a relatively high degree of polymerization. Additionally, when the incorporation of carbonated wollastonite ranged from 5 % to 15 %, it accelerated the cement reaction process and improved both the compressive strength and flexural strength of cement mortar. The research findings will provide support for enhancing the performance of cement-based building materials and promoting low-carbon development in the construction and building materials.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

20500 - Materials engineering

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Construction and Building Materials

ISSN

0950-0618

e-ISSN

1879-0526

Svazek periodika

494

Číslo periodika v rámci svazku

10 October 2025

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

nestránkováno

Kód UT WoS článku

001572429000001

EID výsledku v databázi Scopus

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