A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Microstructure evolution and impact resistance of crumb rubber concrete after elevated temperatures
https://orcid.org/0000-0002-6564-1023
Highlights The impact resistance of CRC after exposure to elevated temperatures was investigated by SHPB. The full-scale pore structure of CRC after elevated temperature was studied by CT and NMR. The ultimate compressive strength under dynamic load is linearly related to the porosity and logarithm of strain rate.
Abstract With the rapid development of the automobile industry, the disposal of scrap tires in an eco-friendly manner has become a global concern. Due to excellent toughness and durability performance of crumb rubber concrete (CRC), it is a promising approach for recycling massive scrap tires. In this study, the impact resistance of CRC after exposure to elevated temperatures (200 °C and 400 °C) was experimentally investigated using a split Hopkinson bar (SHPB). The pore structure, hydrates and morphology of CRC microstructure evolution after elevated temperatures were also studied using an ultra-depth of field test, TG-DSC, CT, and NMR. Results show that although rubber concrete is subjected to 200 °C high temperature, its strength and impact resistance do not decrease because rubber can release the capillary pressure caused by elevated temperature. However, a significant loss in the ultimate strength is observed at 400 °C. This is because when CRC with a rubber content of 100 kg/m3 is subjected to an elevated temperature of 400 °C, its void (pore size > 1 μm) ratio is 3.4 times higher than that of plain concrete. The addition of rubber particles improves the impact toughness of concrete even after the elevated temperature of 400 °C, and the ultimate compressive strength under dynamic load is linearly related to the porosity and logarithm of strain rate.
Microstructure evolution and impact resistance of crumb rubber concrete after elevated temperatures
https://orcid.org/0000-0002-6564-1023
Highlights The impact resistance of CRC after exposure to elevated temperatures was investigated by SHPB. The full-scale pore structure of CRC after elevated temperature was studied by CT and NMR. The ultimate compressive strength under dynamic load is linearly related to the porosity and logarithm of strain rate.
Abstract With the rapid development of the automobile industry, the disposal of scrap tires in an eco-friendly manner has become a global concern. Due to excellent toughness and durability performance of crumb rubber concrete (CRC), it is a promising approach for recycling massive scrap tires. In this study, the impact resistance of CRC after exposure to elevated temperatures (200 °C and 400 °C) was experimentally investigated using a split Hopkinson bar (SHPB). The pore structure, hydrates and morphology of CRC microstructure evolution after elevated temperatures were also studied using an ultra-depth of field test, TG-DSC, CT, and NMR. Results show that although rubber concrete is subjected to 200 °C high temperature, its strength and impact resistance do not decrease because rubber can release the capillary pressure caused by elevated temperature. However, a significant loss in the ultimate strength is observed at 400 °C. This is because when CRC with a rubber content of 100 kg/m3 is subjected to an elevated temperature of 400 °C, its void (pore size > 1 μm) ratio is 3.4 times higher than that of plain concrete. The addition of rubber particles improves the impact toughness of concrete even after the elevated temperature of 400 °C, and the ultimate compressive strength under dynamic load is linearly related to the porosity and logarithm of strain rate.
Microstructure evolution and impact resistance of crumb rubber concrete after elevated temperatures
https://orcid.org/0000-0002-6564-1023
Highlights The impact resistance of CRC after exposure to elevated temperatures was investigated by SHPB. The full-scale pore structure of CRC after elevated temperature was studied by CT and NMR. The ultimate compressive strength under dynamic load is linearly related to the porosity and logarithm of strain rate.
Abstract With the rapid development of the automobile industry, the disposal of scrap tires in an eco-friendly manner has become a global concern. Due to excellent toughness and durability performance of crumb rubber concrete (CRC), it is a promising approach for recycling massive scrap tires. In this study, the impact resistance of CRC after exposure to elevated temperatures (200 °C and 400 °C) was experimentally investigated using a split Hopkinson bar (SHPB). The pore structure, hydrates and morphology of CRC microstructure evolution after elevated temperatures were also studied using an ultra-depth of field test, TG-DSC, CT, and NMR. Results show that although rubber concrete is subjected to 200 °C high temperature, its strength and impact resistance do not decrease because rubber can release the capillary pressure caused by elevated temperature. However, a significant loss in the ultimate strength is observed at 400 °C. This is because when CRC with a rubber content of 100 kg/m3 is subjected to an elevated temperature of 400 °C, its void (pore size > 1 μm) ratio is 3.4 times higher than that of plain concrete. The addition of rubber particles improves the impact toughness of concrete even after the elevated temperature of 400 °C, and the ultimate compressive strength under dynamic load is linearly related to the porosity and logarithm of strain rate.
Microstructure evolution and impact resistance of crumb rubber concrete after elevated temperatures
Yu, Yong (author) / Jin, Zuquan (author) / Shen, Dongxian (author) / An, Junlin (author) / Sun, Yuyan (author) / Li, Ning (author)
2023-04-06
Article (Journal)
Electronic Resource
English
Behavior of fiber reinforced polymer (FRP)- confined crumb rubber concrete at elevated temperatures
| BASE | 2018
Crumb Rubber Concrete Bridge Deck
| Online Contents | 2017