Physicochemical, Mineralogical, and Mechanical Properties of Calcium Aluminate Cement Concrete Exposed to Elevated Temperatures
One commonly used cement type for thermal applications is CAC containing 38–40% alumina, although the postheated behavior of this cement subjected to elevated temperature has not been studied yet. Here, through extensive experimentation, the postheated mineralogical and physicochemical features of c...
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MDPI AG
2021-07-01
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| Online Access: | https://www.mdpi.com/1996-1944/14/14/3855 |
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| author | Amirmohamad Abolhasani Bijan Samali Fatemeh Aslani |
| author_facet | Amirmohamad Abolhasani Bijan Samali Fatemeh Aslani |
| author_sort | Amirmohamad Abolhasani |
| collection | DOAJ |
| description | One commonly used cement type for thermal applications is CAC containing 38–40% alumina, although the postheated behavior of this cement subjected to elevated temperature has not been studied yet. Here, through extensive experimentation, the postheated mineralogical and physicochemical features of calcium aluminate cement concrete (CACC) were examined via DTA/TGA, X-ray diffraction (XRD), and scanning electron microscopy (SEM) imaging and the variation in the concrete physical features and the compressive strength deterioration with temperature rise were examined through ultrasonic pulse velocity (UPV) values. In addition, other mechanical features that were addressed were the residual tensile strength and elastic modulus. According to the XRD test results, with the temperature rise, the dehydration of the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>C</mi><mn>3</mn></msub><mi>A</mi><msub><mi>H</mi><mn>6</mn></msub></mrow></semantics></math></inline-formula> structure occurred, which, in turn, led to the crystallization of the monocalcium dialuminate (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>C</mi><msub><mi>A</mi><mn>2</mn></msub></mrow></semantics></math></inline-formula>) and alumina (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>A</mi><msub><mi>l</mi><mn>2</mn></msub><msub><mi>O</mi><mn>3</mn></msub></mrow></semantics></math></inline-formula>) structures. The SEM images indicated specific variations in morphology that corresponded to concrete deterioration due to heat. |
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| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T09:33:12Z |
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| spelling | doaj.art-3334cdfe450349768fbeaae717b826342023-11-22T04:15:49ZengMDPI AGMaterials1996-19442021-07-011414385510.3390/ma14143855Physicochemical, Mineralogical, and Mechanical Properties of Calcium Aluminate Cement Concrete Exposed to Elevated TemperaturesAmirmohamad Abolhasani0Bijan Samali1Fatemeh Aslani2Department of Civil Engineering, Babol Noshirvani University of Technology, Babol 47148-71167, IranCentre for Infrastructure Engineering, School of Engineering, Western Sydney University, Sydney, NSW 1000, AustraliaDepartment of Civil Engineering, Babol Noshirvani University of Technology, Babol 47148-71167, IranOne commonly used cement type for thermal applications is CAC containing 38–40% alumina, although the postheated behavior of this cement subjected to elevated temperature has not been studied yet. Here, through extensive experimentation, the postheated mineralogical and physicochemical features of calcium aluminate cement concrete (CACC) were examined via DTA/TGA, X-ray diffraction (XRD), and scanning electron microscopy (SEM) imaging and the variation in the concrete physical features and the compressive strength deterioration with temperature rise were examined through ultrasonic pulse velocity (UPV) values. In addition, other mechanical features that were addressed were the residual tensile strength and elastic modulus. According to the XRD test results, with the temperature rise, the dehydration of the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>C</mi><mn>3</mn></msub><mi>A</mi><msub><mi>H</mi><mn>6</mn></msub></mrow></semantics></math></inline-formula> structure occurred, which, in turn, led to the crystallization of the monocalcium dialuminate (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>C</mi><msub><mi>A</mi><mn>2</mn></msub></mrow></semantics></math></inline-formula>) and alumina (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>A</mi><msub><mi>l</mi><mn>2</mn></msub><msub><mi>O</mi><mn>3</mn></msub></mrow></semantics></math></inline-formula>) structures. The SEM images indicated specific variations in morphology that corresponded to concrete deterioration due to heat.https://www.mdpi.com/1996-1944/14/14/3855calcium aluminate cementhigh temperaturesmechanical propertymicrostructure |
| spellingShingle | Amirmohamad Abolhasani Bijan Samali Fatemeh Aslani Physicochemical, Mineralogical, and Mechanical Properties of Calcium Aluminate Cement Concrete Exposed to Elevated Temperatures Materials calcium aluminate cement high temperatures mechanical property microstructure |
| title | Physicochemical, Mineralogical, and Mechanical Properties of Calcium Aluminate Cement Concrete Exposed to Elevated Temperatures |
| title_full | Physicochemical, Mineralogical, and Mechanical Properties of Calcium Aluminate Cement Concrete Exposed to Elevated Temperatures |
| title_fullStr | Physicochemical, Mineralogical, and Mechanical Properties of Calcium Aluminate Cement Concrete Exposed to Elevated Temperatures |
| title_full_unstemmed | Physicochemical, Mineralogical, and Mechanical Properties of Calcium Aluminate Cement Concrete Exposed to Elevated Temperatures |
| title_short | Physicochemical, Mineralogical, and Mechanical Properties of Calcium Aluminate Cement Concrete Exposed to Elevated Temperatures |
| title_sort | physicochemical mineralogical and mechanical properties of calcium aluminate cement concrete exposed to elevated temperatures |
| topic | calcium aluminate cement high temperatures mechanical property microstructure |
| url | https://www.mdpi.com/1996-1944/14/14/3855 |
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