Statistical modeling of rubberized concrete beams confined by FRP using RSM technique

Tufail, Rana Faisal; Xiong, Feng; Zahid, Muhammad; Utashev, Nodir; Mehmood, Tahir; Nawaz, Adnan; Maqsoom, Ahsen; Salahuddin, Hammad

doi:10.1007/s12046-020-01349-7

Cited by 1 publication

(1 citation statement)

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“…Studies have shown that RCA is generally porous in nature and higher percentage replacement decreases the strength which can be attributed to the weak residual mortar layer, and also the characteristics of RCA obtained from the construction and demolition site. It was reported that concrete slump and strength decreased as more RCA was added for natural aggregates (Heidari A 2018;Tufail et al 2020). In studies conducted by Chakradhara Rao M (2018) found that the compressive strength reduces by 20% for complete RCA replacement.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Novel M25 Green Concrete with GGBS, DRS and RCA Material–A Study Employing Response Surface Methodology

Chinnaiyan

Kumar

et al. 2021

Preprint

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Global push for sustainability is increasing rapidly and countries are trying their best to become self-sustainable. Achieving a closed loop system in an industrial production has become a major objective in order to achieve self-sustainability and thus reducing the carbon footprint. Key aspect of a closed loop system includes reusing the byproducts and waste materials for a more productive process rather than dumping up in a landfill. In this study, waste and used materials like ground granulated blast slag (GGBS) up to 50%, dolomite rock sand (DRS) up to 30% and recycled coarse aggregate (RCA) up to 30% were chosen as replacement for cement, fine aggregate and coarse aggregate respectively for the making of novel M25 grade green concrete. Concrete properties viz., slump, compressive strength, split tensile strength and flexural strength were tested and corresponding regression models were developed. The developed models were used to obtain optimum percentage addition of GGBS (> 20%), DRS (> 9%) and RCA (< 17%) for achieving M25 grade strength. Further an increase of GGBS to 50%, DRS to 30% and with elimination of RCA, the compressive strength increased by 59% (39.7 MPa), Split tensile increased by 23% (4.3 MPa) and flexural strength increased by 19% (4.2 MPa) in comparison to M25 concrete. The study found that the waste materials can be sustainably used to prepare novel M25 green concrete which achieved higher strength than conventional concrete, thus reducing the cost of concrete and with reduced carbon footprint on the environment.

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Section: Introductionmentioning

confidence: 99%