Residual mechanical properties of concretes made with steel fiber taken from waste tires after exposure to high temperatures

2019 ◽  
Author(s):  
C. SIMONETTI ◽  
A.L. BAUER ◽  
A.M. GIL ◽  
F. PACHECO ◽  
V. KODUR ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Temperatures ◽  
Steel Fiber ◽  
Waste Tires ◽  
Residual Mechanical Properties

scholarly journals Behavior of Steel Slag Concrete Subjected to Elevated Temperature

2020 ◽  
Vol 9 (4) ◽  
pp. 1165-1170
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compressive Strength ◽  
High Temperatures ◽  
Elevated Temperatures ◽  
Coarse Aggregate ◽  
Steel Slag ◽  
Partial Replacement ◽  
High Porosity ◽  
Residual Mechanical Properties

Recycling of materials has become a major interest for engineers. At present, the amount of slag deposited in storage yard adds up to millions of tons/year leading to the occupation of farm land and serious pollution to the environment, as a result of the rapid growth in the steel industry. Steel slag is made at 1500- 1650°C having a honey comp shape with high porosity. Using steel slag as the natural aggregate with a lower waste material cost can be considered as a good alternative for sustainable constructions. The objective of this study is to evaluate the performance of residual mechanical properties of concrete with steel slag as coarse aggregate partial replacement after exposing to high temperatures .This study investigates the behavior of using granulated slag as partial or fully coarse aggregate replacement with different percentages of 0%, 15%, 30%, 50% and 100% in concrete when subjected to elevated temperatures. Six groups of concrete mixes were prepared using various replacement percentages of slag exposed to different temperatures of 400 °C, 600 °C and 800 °C for different durations of 1hr, 1.5hr and 2hr. Evaluation tests were compressive strength, tensile strength, and bond strength. The steel slag concrete mixes showed week workability lower than control mix. A systematic increasing of almost up to 21.7% in compressive strength, and 66.2% in tensile strength with increasing the percentage of steel slag replacement to 50%. And the results showed improvement on concrete residual mechanical properties after subjected to elevated temperatures with the increase of steel slag content. The findings of this study give an overview of the effect of steel slag coarse aggregate replacement on concrete after exposed to high temperatures.

Residual mechanical properties of mortars containing carbon nanomaterials exposed to high temperatures

2021 ◽  
Vol 275 ◽  
pp. 122123
Author(s):  
Gustavo Henrique Nalon ◽  
José Carlos Lopes Ribeiro ◽  
Eduardo Nery Duarte de Araújo ◽  
Leonardo Gonçalves Pedroti ◽  
José Maria Franco de Carvalho ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Temperatures ◽  
Carbon Nanomaterials ◽  
Residual Mechanical Properties

scholarly journals Experimental Research on Fire Resistance of Reactive Powder Concrete

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Gai-Fei Peng ◽  
Yi-Rong Kang ◽  
Yan-Zhu Huang ◽  
Xiao-Ping Liu ◽  
Qiang Chen
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Fire Resistance ◽  
Steel Fiber ◽  
Polypropylene Fiber ◽  
Reactive Powder Concrete ◽  
Explosive Spalling ◽  
Residual Mechanical Properties ◽  
Tensile Splitting Strength ◽  
Reactive Powder

An experimental investigation was conducted on fire resistance of reactive powder concrete (RPC), mainly on explosive spalling occurrence and residual mechanical properties exposed to high temperature. The residual mechanical properties measured include compressive strength, tensile splitting strength, and fracture energy. RPC was prepared using cement, sand, silica fume, steel fiber, and polypropylene fiber. After subjected to high temperatures from 200 to 600°C, the residual mechanical properties were determined. RPC spalled considerably under high temperature. After exposure to high temperatures from 200 to 400°C, mechanical properties were enhanced more or less, which can be attributed to further hydration of cementitious materials activated by elevated temperature. Compressive strength started to decrease after exposure to 400°C, but tensile splitting strength and fracture energy started to decrease after exposure to 200°C. Incorporating hybrid fiber (polypropylene fiber and steel fiber) is a promising way to enhance resistance of RPC to explosive spalling, which should be a main objective for improving its fire resistance.

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