This study explores and enhances the resistance of an ultra-high-performance concrete (UHPC) to explosive spalling under elevated temperatures. This study investigates the impact of lightweight aggregates (LWAs) on the mechanical and microstructural properties of the UHPC. Various UHPC specimens were created by replacing silica sand with LWAs in percentages ranging from 0% to 30%. The evaluation of these specimens involved assessing their compressive and flexural strengths, density, mass loss, shrinkage, porosity, and microstructural characteristics using scanning electron microscopy (SEM). This study provides valuable insights by analyzing the influence of lightweight aggregates on the strength, durability, and microstructure of UHPC. The results reveal that incorporating LWAs in the UHPC improved its flowability while decreasing its density, as the percentage of LWAs increased from 5% to 30%. Including 30% LWA resulted in a mass loss of 4.8% at 300 & DEG;C, which reduced the compressive and flexural strengths across all curing durations. However, the UHPC samples subjected to higher temperatures displayed higher strength than those exposed to ambient conditions. The microstructure analysis demonstrated that the UHPC specimens with 30% LWA exhibited increased density due to continuous hydration from the water in the lightweight aggregate. The pore size distribution graph indicated that incorporating more of the LWA increased porosity, although the returns diminished beyond a certain point. Overall, these findings offer valuable insights into the influence of lightweight aggregates on the physical and strength characteristics of UHPC. This research holds significant implications for developing high-performance, lightweight concrete materials.
机构:
Cerema, Project Team DIMA, 120 Rue Paris,BP 216 Sourdun, F-77487 Provins, France
Univ Nantes, Lunam Univ, IUT St Nazaire, GeM,UMR CNRS 6183, 58 Rue Michel Ange,BP 420, F-44600 St Nazaire, France
Univ Mosul, Dept Environm Engn, Coll Engn, Mosul 41002, IraqCerema, Project Team DIMA, 120 Rue Paris,BP 216 Sourdun, F-77487 Provins, France
Abdulkareem, Omar M.
Ben Fraj, Amor
论文数: 0引用数: 0
h-index: 0
机构:
Cerema, Project Team DIMA, 120 Rue Paris,BP 216 Sourdun, F-77487 Provins, FranceCerema, Project Team DIMA, 120 Rue Paris,BP 216 Sourdun, F-77487 Provins, France
Ben Fraj, Amor
Bouasker, Marwen
论文数: 0引用数: 0
h-index: 0
机构:
Univ Orleans, PRISME Lab, 8 Rue Leonard de Vinci, F-45072 Orleans, FranceCerema, Project Team DIMA, 120 Rue Paris,BP 216 Sourdun, F-77487 Provins, France
Bouasker, Marwen
Khelidj, Abdelhafid
论文数: 0引用数: 0
h-index: 0
机构:
Univ Nantes, Lunam Univ, IUT St Nazaire, GeM,UMR CNRS 6183, 58 Rue Michel Ange,BP 420, F-44600 St Nazaire, FranceCerema, Project Team DIMA, 120 Rue Paris,BP 216 Sourdun, F-77487 Provins, France
机构:
King Fahd Univ Petr & Minerals, Coll Petr Engn & Geosci, Dhahran 31261, Saudi ArabiaKing Fahd Univ Petr & Minerals, Coll Petr Engn & Geosci, Dhahran 31261, Saudi Arabia
Ahmed, Abdulmalek
Ali, Abdulwahab
论文数: 0引用数: 0
h-index: 0
机构:
King Fahd Univ Petr & Minerals, Ctr Integrat Petr Res, Dhahran 31261, Saudi ArabiaKing Fahd Univ Petr & Minerals, Coll Petr Engn & Geosci, Dhahran 31261, Saudi Arabia
Ali, Abdulwahab
Elkatatny, Salaheldin
论文数: 0引用数: 0
h-index: 0
机构:
King Fahd Univ Petr & Minerals, Coll Petr Engn & Geosci, Dhahran 31261, Saudi ArabiaKing Fahd Univ Petr & Minerals, Coll Petr Engn & Geosci, Dhahran 31261, Saudi Arabia
Elkatatny, Salaheldin
Abdulraheem, Abdulazeez
论文数: 0引用数: 0
h-index: 0
机构:
King Fahd Univ Petr & Minerals, Coll Petr Engn & Geosci, Dhahran 31261, Saudi ArabiaKing Fahd Univ Petr & Minerals, Coll Petr Engn & Geosci, Dhahran 31261, Saudi Arabia
机构:
Cerema, Project Team DIMA, 120 Rue Paris,BP 216 Sourdun, F-77487 Provins, France
Univ Nantes, Lunam Univ, IUT St Nazaire, GeM,UMR CNRS 6183, 58 Rue Michel Ange,BP 420, F-44600 St Nazaire, France
Univ Mosul, Dept Environm Engn, Coll Engn, Mosul 41002, IraqCerema, Project Team DIMA, 120 Rue Paris,BP 216 Sourdun, F-77487 Provins, France
Abdulkareem, Omar M.
Ben Fraj, Amor
论文数: 0引用数: 0
h-index: 0
机构:
Cerema, Project Team DIMA, 120 Rue Paris,BP 216 Sourdun, F-77487 Provins, FranceCerema, Project Team DIMA, 120 Rue Paris,BP 216 Sourdun, F-77487 Provins, France
Ben Fraj, Amor
Bouasker, Marwen
论文数: 0引用数: 0
h-index: 0
机构:
Univ Orleans, PRISME Lab, 8 Rue Leonard de Vinci, F-45072 Orleans, FranceCerema, Project Team DIMA, 120 Rue Paris,BP 216 Sourdun, F-77487 Provins, France
Bouasker, Marwen
Khelidj, Abdelhafid
论文数: 0引用数: 0
h-index: 0
机构:
Univ Nantes, Lunam Univ, IUT St Nazaire, GeM,UMR CNRS 6183, 58 Rue Michel Ange,BP 420, F-44600 St Nazaire, FranceCerema, Project Team DIMA, 120 Rue Paris,BP 216 Sourdun, F-77487 Provins, France
机构:
King Fahd Univ Petr & Minerals, Coll Petr Engn & Geosci, Dhahran 31261, Saudi ArabiaKing Fahd Univ Petr & Minerals, Coll Petr Engn & Geosci, Dhahran 31261, Saudi Arabia
Ahmed, Abdulmalek
Ali, Abdulwahab
论文数: 0引用数: 0
h-index: 0
机构:
King Fahd Univ Petr & Minerals, Ctr Integrat Petr Res, Dhahran 31261, Saudi ArabiaKing Fahd Univ Petr & Minerals, Coll Petr Engn & Geosci, Dhahran 31261, Saudi Arabia
Ali, Abdulwahab
Elkatatny, Salaheldin
论文数: 0引用数: 0
h-index: 0
机构:
King Fahd Univ Petr & Minerals, Coll Petr Engn & Geosci, Dhahran 31261, Saudi ArabiaKing Fahd Univ Petr & Minerals, Coll Petr Engn & Geosci, Dhahran 31261, Saudi Arabia
Elkatatny, Salaheldin
Abdulraheem, Abdulazeez
论文数: 0引用数: 0
h-index: 0
机构:
King Fahd Univ Petr & Minerals, Coll Petr Engn & Geosci, Dhahran 31261, Saudi ArabiaKing Fahd Univ Petr & Minerals, Coll Petr Engn & Geosci, Dhahran 31261, Saudi Arabia