Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effect of age and sulfate chloride environment on the Self-Healing performance of the desert sand engineered cementitious composite materials
https://orcid.org/0000-0002-6324-9394
https://orcid.org/0000-0002-1299-5952
Highlights: We explored the effects of different ions on the self-healing performance of PE-ECC. WE setting two evaluation methods: tensile strength recovery rate and resonance frequency recovery rate. We used two sampling methods to compare and analyze the self-healing products of PE-ECC. Combining SEM, XRD, and EDS methods, the self-healing products and self-healing process of PE-ECC were summarized.
Abstract This study applied pre-damage of 1 % tensile strain and 75 % failure loads to tensile and prismatic specimens of desert sand polyethylene fiber (PE) engineered cementitious composite (ECC) specimens at different ages (3 and 28 days), respectively. Self-healing was applied to the pre-damaged PE-ECC under 5 % Na2SO4 and 3 % NaCl, 5 % Na2SO4, and water environments. The mechanical properties of the PE-ECC after self-healing, the changes in the number and width of cracks, tensile strength and resonance frequency recovery rate were analyzed. Then, the self-healing products and self-healing process of the PE-ECC were further examined by SEM, EDS, and XRD microscopy. Results showed that self-healing PE-ECC could complete the process within 10 days in different environments and found the self-healing process involved the continuous generation and consumption of self-healing products. The 3-day-old self-healing PE-ECC was stronger than its 28-day-old counterpart. The self-healing performance was strongest in 5 % Na2SO4, whereas it was weakest in water. The main self-healing product of the PE-ECC was CaCO3, which was the result of the coupling effect of carbonization, secondary hydration, and erosion product fillings.
Effect of age and sulfate chloride environment on the Self-Healing performance of the desert sand engineered cementitious composite materials
https://orcid.org/0000-0002-6324-9394
https://orcid.org/0000-0002-1299-5952
Highlights: We explored the effects of different ions on the self-healing performance of PE-ECC. WE setting two evaluation methods: tensile strength recovery rate and resonance frequency recovery rate. We used two sampling methods to compare and analyze the self-healing products of PE-ECC. Combining SEM, XRD, and EDS methods, the self-healing products and self-healing process of PE-ECC were summarized.
Abstract This study applied pre-damage of 1 % tensile strain and 75 % failure loads to tensile and prismatic specimens of desert sand polyethylene fiber (PE) engineered cementitious composite (ECC) specimens at different ages (3 and 28 days), respectively. Self-healing was applied to the pre-damaged PE-ECC under 5 % Na2SO4 and 3 % NaCl, 5 % Na2SO4, and water environments. The mechanical properties of the PE-ECC after self-healing, the changes in the number and width of cracks, tensile strength and resonance frequency recovery rate were analyzed. Then, the self-healing products and self-healing process of the PE-ECC were further examined by SEM, EDS, and XRD microscopy. Results showed that self-healing PE-ECC could complete the process within 10 days in different environments and found the self-healing process involved the continuous generation and consumption of self-healing products. The 3-day-old self-healing PE-ECC was stronger than its 28-day-old counterpart. The self-healing performance was strongest in 5 % Na2SO4, whereas it was weakest in water. The main self-healing product of the PE-ECC was CaCO3, which was the result of the coupling effect of carbonization, secondary hydration, and erosion product fillings.
Effect of age and sulfate chloride environment on the Self-Healing performance of the desert sand engineered cementitious composite materials
https://orcid.org/0000-0002-6324-9394
https://orcid.org/0000-0002-1299-5952
Highlights: We explored the effects of different ions on the self-healing performance of PE-ECC. WE setting two evaluation methods: tensile strength recovery rate and resonance frequency recovery rate. We used two sampling methods to compare and analyze the self-healing products of PE-ECC. Combining SEM, XRD, and EDS methods, the self-healing products and self-healing process of PE-ECC were summarized.
Abstract This study applied pre-damage of 1 % tensile strain and 75 % failure loads to tensile and prismatic specimens of desert sand polyethylene fiber (PE) engineered cementitious composite (ECC) specimens at different ages (3 and 28 days), respectively. Self-healing was applied to the pre-damaged PE-ECC under 5 % Na2SO4 and 3 % NaCl, 5 % Na2SO4, and water environments. The mechanical properties of the PE-ECC after self-healing, the changes in the number and width of cracks, tensile strength and resonance frequency recovery rate were analyzed. Then, the self-healing products and self-healing process of the PE-ECC were further examined by SEM, EDS, and XRD microscopy. Results showed that self-healing PE-ECC could complete the process within 10 days in different environments and found the self-healing process involved the continuous generation and consumption of self-healing products. The 3-day-old self-healing PE-ECC was stronger than its 28-day-old counterpart. The self-healing performance was strongest in 5 % Na2SO4, whereas it was weakest in water. The main self-healing product of the PE-ECC was CaCO3, which was the result of the coupling effect of carbonization, secondary hydration, and erosion product fillings.
Effect of age and sulfate chloride environment on the Self-Healing performance of the desert sand engineered cementitious composite materials
Niu, Yanfeng (Autor:in) / Han, Fengxia (Autor:in) / Liu, Qing (Autor:in)
11.10.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch