Investigation on the Properties of Sustainable Steel Fiber Reinforced Reactive Powder Concrete by Utilization of Coir Pith Aggregates and Pyrogenic Silica

Silicon ◽  
2021 ◽  
Author(s):  
A. Oorkalan ◽  
S. Chithra
Keyword(s):  
Steel Fiber ◽  
Reactive Powder Concrete ◽  
Fiber Reinforced ◽  
Coir Pith ◽  
Pyrogenic Silica ◽  
Reactive Powder

Tensile Properties of Steel Fiber-Reinforced Reactive Powder Concrete after High Temperature

2011 ◽  
Vol 413 ◽  
pp. 270-276 ◽  
Author(s):  
Wen Zhong Zheng ◽  
Hai Yan Li ◽  
Ying Wang ◽  
Heng Yan Xie
Keyword(s):  
Tensile Strength ◽  
High Temperature ◽  
Steel Fiber ◽  
Heating Temperature ◽  
Fiber Content ◽  
Reactive Powder Concrete ◽  
Fiber Reinforced ◽  
Critical Temperatures ◽  
Reactive Powder ◽  
The Relationship

87 prismatic flexural steel fiber-reinforced reactive powder concrete (RPC) specimens with the size of 40mm×40mm×160mm were tested as well as 87 dumbbell-shaped axis tensile RPC specimens after being exposed to different high temperatures. The effect of steel fiber content and heating temperature on the flexural and tensile strength of steel fiber-reinforced RPC was analyzed. With the steel fiber content increasing, the flexural and tensile strength of steel fiber-reinforced RPC after high temperature improve significantly, and they increase first and then decrease with the heating temperature elevated, and the critical temperatures are 200¡æ and 120¡æ, respectively. Equations are established to express the relationship between the flexural and tensile strength of steel fiber-reinforced RPC and the heating temperature. The theoretical curves are in good agreement with the test data.

scholarly journals Investigation on the Properties of Sustainable Reactive Powder Concrete by Utilization of Coir Pith Aggregates and Pyrogenic Silica

2021 ◽  
Author(s):  
Oorkalan A ◽  
Chithra S
Keyword(s):  
Silica Fume ◽  
Low Cost ◽  
Autogenous Shrinkage ◽  
Drying Shrinkage ◽  
Particle Packing ◽  
Reactive Powder Concrete ◽  
Fine Aggregate ◽  
Coir Pith ◽  
Pyrogenic Silica ◽  
Reactive Powder

Abstract The present study investigates the properties of RPC developed using low cost eco-friendly materials such as pyrogenic silica (PS) and coir pith (CP) fine aggregates. This study investigates the effects of PS as silica fume replacement which is the main constituent for the production of reactive powder concrete which contained coir pith as a fine aggregate replacement instead of quartz sand up to 25%. The use of silica fume increases the particle packing density of RPC but increases the shrinkage phenomenon in RPC due to the minimum w/b ratio adopted. Therefore, in this research PS is used as a partial substitute for SF up to 30% and its effect on the mechanical and durability properties of coir pith containing RPC is studied. The test results showed that the mechanical strength values decreased with an increase in the addition of CP aggregate beyond 5% whereas the decrement in compressive strength was partially reduced when PS is used as silica fume replacement up to a maximum of 30%. The chloride penetration resistance was also improved with increasing PS substitution in RPC containing CP aggregates. The autogenous shrinkage and drying shrinkage were also significantly reduced due to the internal curing ability of the CP aggregates in combination with PS. The development of dense CSH gels from hydration is also evident from low CaO/ SiO2 ratio obtained from the EDS analysis. Hence the combination of PS with CP aggregates can reduce the shrinkage characteristics of RPC thereby providing eco-friendly sustainable concrete at low cost.

Creep behavior of steel fiber reinforced reactive powder concrete at high temperature

2019 ◽  
Vol 205 ◽  
pp. 321-331 ◽  
Author(s):  
Muhammad Abid ◽  
Xiaomeng Hou ◽  
Wenzhong Zheng ◽  
Raja Rizwan Hussain ◽  
Shaojun Cao ◽  
...  
Keyword(s):  
High Temperature ◽  
Creep Behavior ◽  
Steel Fiber ◽  
Reactive Powder Concrete ◽  
Fiber Reinforced ◽  
Reactive Powder

scholarly journals Shear Strength of Steel Fiber Reinforced Reactive Powder Concrete & Geopolymer Concrete – A Comparison

2021 ◽  
Author(s):  
Aravind S Kumar ◽  
Bharati Raj J ◽  
Keerthy M Simon
Keyword(s):  
Shear Strength ◽  
Steel Fiber ◽  
Load Capacity ◽  
High Strength ◽  
Steel Fibers ◽  
Reactive Powder Concrete ◽  
Polymer Concrete ◽  
Geopolymer Concrete ◽  
Fiber Reinforced ◽  
Reactive Powder

Reactive Powder Concrete (RPC) is an ultra-high strength concrete composite prepared by the replacement of natural aggregates with quartz powder, silica fume and steel fibers. The use of RPC yields high strength, high ductile concrete with optimized material use and contributes to economic, sustainable and ecofriendly constructions. Past research has indicated that RPC offers significant improvement in the mechanical and physical properties owing to its homogenous composition with less defects of voids and microcracks. This leads to enhancement of ultimate load capacity of RPC members and results in superior ductility, energy absorption, tensile strain-hardening behavior, crack control capability and durability. Geo-polymer concrete (GPC) is a type of concrete that is made by reacting aluminate and silicate bearing materials with a caustic activator. Usually, waste materials such as fly ash or slag from iron and metal production are used, which helps lead to a cleaner environment. This paper attempts to review the effect of steel fibers on the shear strength of steel fiber reinforced RPC and compare the results with those of geopolymer concrete.

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