Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Characteristic microstructural phase evolution and the compressive strength development mechanisms of tricalcium silicate pastes under various initial carbonation curing environments
https://orcid.org/0000-0002-0164-7741
https://orcid.org/0000-0001-9403-3214
https://orcid.org/0000-0001-8683-1312
https://orcid.org/0000-0003-2473-0625
https://orcid.org/0000-0002-8511-6939
Graphical abstract Display Omitted
Highlights Microstructure of C3S paste under various carbonation curing environments was studied. Phase evolution mechanisms of C3S under carbonation curing environment was clarified. Decalcification of CSH deteriorated the microstructure of C3S pastes. Evolution of CaCO3 and low-Ca/Si CSH enhanced the compressive strength of C3S paste.
Abstract The effects of various initial carbonation curing environments on the phase evolution and resulting mechanical characteristics of tricalcium silicate paste were studied. For the analyses of the reaction products and microstructure, synchrotron X-ray diffraction, thermogravimetry, Fourier transform-infrared spectroscopy, scanning electron microscopy with energy dispersive X-ray spectroscopy and high-resolution X-ray computed tomography were utilized. C3S cured under carbonation environment pressurized by 0.1 MPa showed excellent mechanical properties owing to the highest degree of reaction and homogeneous generation of CaCO3 with low-Ca/Si calcium silicate hydrates, resulting in a dense matrix with refined pore structure. C3S paste treated under other carbonation conditions underwent deteriorative microstructural phase transitions, including void evolution by decalcification of C–S–H and an inhomogeneous composition of crystalline phases, resulting in inferior properties.
Characteristic microstructural phase evolution and the compressive strength development mechanisms of tricalcium silicate pastes under various initial carbonation curing environments
https://orcid.org/0000-0002-0164-7741
https://orcid.org/0000-0001-9403-3214
https://orcid.org/0000-0001-8683-1312
https://orcid.org/0000-0003-2473-0625
https://orcid.org/0000-0002-8511-6939
Graphical abstract Display Omitted
Highlights Microstructure of C3S paste under various carbonation curing environments was studied. Phase evolution mechanisms of C3S under carbonation curing environment was clarified. Decalcification of CSH deteriorated the microstructure of C3S pastes. Evolution of CaCO3 and low-Ca/Si CSH enhanced the compressive strength of C3S paste.
Abstract The effects of various initial carbonation curing environments on the phase evolution and resulting mechanical characteristics of tricalcium silicate paste were studied. For the analyses of the reaction products and microstructure, synchrotron X-ray diffraction, thermogravimetry, Fourier transform-infrared spectroscopy, scanning electron microscopy with energy dispersive X-ray spectroscopy and high-resolution X-ray computed tomography were utilized. C3S cured under carbonation environment pressurized by 0.1 MPa showed excellent mechanical properties owing to the highest degree of reaction and homogeneous generation of CaCO3 with low-Ca/Si calcium silicate hydrates, resulting in a dense matrix with refined pore structure. C3S paste treated under other carbonation conditions underwent deteriorative microstructural phase transitions, including void evolution by decalcification of C–S–H and an inhomogeneous composition of crystalline phases, resulting in inferior properties.
Characteristic microstructural phase evolution and the compressive strength development mechanisms of tricalcium silicate pastes under various initial carbonation curing environments
https://orcid.org/0000-0002-0164-7741
https://orcid.org/0000-0001-9403-3214
https://orcid.org/0000-0001-8683-1312
https://orcid.org/0000-0003-2473-0625
https://orcid.org/0000-0002-8511-6939
Graphical abstract Display Omitted
Highlights Microstructure of C3S paste under various carbonation curing environments was studied. Phase evolution mechanisms of C3S under carbonation curing environment was clarified. Decalcification of CSH deteriorated the microstructure of C3S pastes. Evolution of CaCO3 and low-Ca/Si CSH enhanced the compressive strength of C3S paste.
Abstract The effects of various initial carbonation curing environments on the phase evolution and resulting mechanical characteristics of tricalcium silicate paste were studied. For the analyses of the reaction products and microstructure, synchrotron X-ray diffraction, thermogravimetry, Fourier transform-infrared spectroscopy, scanning electron microscopy with energy dispersive X-ray spectroscopy and high-resolution X-ray computed tomography were utilized. C3S cured under carbonation environment pressurized by 0.1 MPa showed excellent mechanical properties owing to the highest degree of reaction and homogeneous generation of CaCO3 with low-Ca/Si calcium silicate hydrates, resulting in a dense matrix with refined pore structure. C3S paste treated under other carbonation conditions underwent deteriorative microstructural phase transitions, including void evolution by decalcification of C–S–H and an inhomogeneous composition of crystalline phases, resulting in inferior properties.
Characteristic microstructural phase evolution and the compressive strength development mechanisms of tricalcium silicate pastes under various initial carbonation curing environments
Cho, Seongmin (Autor:in) / Suh, Heongwon (Autor:in) / Im, Sumin (Autor:in) / Kim, Gyeongryul (Autor:in) / Kanematsu, Manabu (Autor:in) / Morooka, Satoshi (Autor:in) / Machida, Akihiko (Autor:in) / Shobu, Takahisa (Autor:in) / Bae, Sungchul (Autor:in)
17.10.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| British Library Online Contents | 2017