Behaviour of GGBS-dolomite geopolymer concrete short column under axial loading

Saranya, P.; Nagarajan, Praveen; Shashikala, A. P.

doi:10.1016/j.jobe.2020.101232

Cited by 19 publications

(13 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The increase in strength might be owing to the effective role of fibers in improving the behavior of both the cover concrete and core concrete by arresting microcracks and bridging across the macrocracks. This crack-arresting procedure of multiple cracking lasted until the fibers failed or were pulled out [33,51]. The steel fibers also assisted in preventing the early spalling of the concrete cover that helped the core concrete to resist the higher loads [39].…”

Section: Ultimate Loading Capacitymentioning

confidence: 99%

Behavior of Quarry Rock Dust, Fly Ash and Slag Based Geopolymer Concrete Columns Reinforced with Steel Fibers under Eccentric Loading

Waqas

Butt

2021

Applied Sciences

View full text Add to dashboard Cite

Geopolymer concrete, also known as an earth-friendly concrete, has been under continuous study due to its environmental benefits and a sustainable alternative to conventional concrete construction. The supplies of many source materials, such as fly ash (FA) or slag (SG), to produce geopolymer concrete (GPC) may be limited; however, quarry rock dust (QRD) wastes (limestone, dolomite, or silica powders) formed by crushing rocks appear virtually endless. Although significant experimental research has been carried out on GPC, with a major focus on the mix design development, rheological, durability, and mechanical properties of the GPC mixes; still the information available on the structural behavior of GPC is rather limited. This has implications in extending GPC application from a laboratory-based technology to an at-site product. This study investigates the structural behavior of quarry-rock-dust-incorporated fiber-reinforced GPC columns under concentric and eccentric loading. In this study, a total of 20 columns with 200 mm square cross-section and 1000 mm height were tested. The FA and SG were used as source materials to produce GPC mixtures. The QRD was incorporated as a partial replacement (20%) of SG. The conventional concrete (CC) columns were prepared as the reference specimens. The effect of incorporating quarry rock dust as a replacement of SG, steel fibers, and loading conditions (concentric and eccentric loading) on the structural behavior of GPC columns were studied. The test results revealed that quarry rock dust is an adequate material that can be used as a source material in GPC to manufacture structural concrete members with satisfactory performance. The general performance of the GPC columns incorporating QRD (20%) is observed to be similar to that of GPC columns (without QRD) and CC columns. The addition of steel fibers considerably improves the loading capacity, ductility, and axial load–displacement behavior of the tested columns. The load capacities of fiber-reinforced GPC columns were about 5–7% greater in comparison to the CC columns. The spalling of concrete cover at failure was detected in all plain GPC columns, whereas the failure mode of all fiber-reinforced GPC columns is characterized with surface cracking leading to disintegration of concrete cover.

show abstract

Section: Ultimate Loading Capacitymentioning

confidence: 99%

Behavior of Quarry Rock Dust, Fly Ash and Slag Based Geopolymer Concrete Columns Reinforced with Steel Fibers under Eccentric Loading

Waqas

Butt

2021

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…Carbon dioxide can react with dissolved calcium hydroxide, these processes involves three main steps [31]: (1). Dissolution of CH (2). Absorption of carbon dioxide and formation of carbonate ions (3).…”

Section: Scanning Electron Microscopy Analysismentioning

confidence: 99%

“…With the increasing awareness of CO 2 emission reduction in all construction sectors, mineral cementitious materials has been regarded as a prominent alternative to ordinary Portland cement (OPC) [1]. Supplementary cementitious materials (SCM) such as, ground granulated blast furnace slag (GGBS), fly ash (FA), metakaolin are the emerging products that can replace OPC to minimize emission of greenhouse gases in the environment which leads to global warming [2]. Fly ash can replace up to 50% of OPC in concrete mixture, and the 25% replacement of fly ash is common.…”

Section: Introductionmentioning

confidence: 99%

“…The chemical composition of mineral slag varies noticeably depending on the chemical composition of the raw materials in the production process. The main constitutes of the slag are lime, silica and alumina similar as that of OPC and is collected from iron or steel processing industry [2], [5]. GGBS is less in lime content than OPC, the availability of alumina in GGBS is higher than OPC.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mineral Slag used as an Alternative of Cement in Concrete

Zhao¹,

Zhao²,

Wang³

2020

World Congress on Civil, Structural, and Environmental Engineering

View full text Add to dashboard Cite

This paper summarizes the results of experimental studies carried out at Zhengzhou University, school of Mechanics and Engineering Science, research laboratory, on the performance of concrete produced by combining ordinary Portland cement (OPC) with ground-granulated blast furnace slag (GGBS). Concrete specimens cast with OPC and various percentage of GGBS (0%, 30%, 50%, and 70%) were subjected to high temperature exposure and extensive experimental test reproducing basic freeze-thaw cycle and a chloride-ion attack to determine their combined effects within the concrete samples. From the experimental studies comparisons were made on the physical, mechanical, and microstructural properties in compassion with ordinary Portland cement concrete (OPC). Further, durability of GGBS cement concrete such as exposure to chloride ion attack and freeze-thaw action in compassion with various percentage of GGBS and ordinary Portland cement concrete of similar mixture composition were analyzed. The microstructure, mineralogical composition, and pore size distribution of concrete specimens were determined via Scanning electron microscopy analysis (SEM), and X-ray diffraction (XRD). The result demonstrated that when the exposure temperature increases from 200 ºC to 400 ºC, the residual compressive strength was fluctuating for all concrete group; and compressive strength and chloride ion exposure of the concrete decreased with the increasing of slag content. The SEM and EDS results showed an increase in carbonation rate with increasing of slag content.

show abstract

“…In addition, the fabrication of GPC is significantly influenced by the curing temperature and duration [ 33 , 34 ]. Saranya et al [ 35 ] explored the behavior of steel fiber-reinforced dolomite-GGBS GPC short compressive members subjected to axial compressive loading and found that these compressive members portrayed higher axial compressive strength than steel fiber-reinforced OPC compressive members. Additionally, dolomite-GGBS GPC compression members without ductile detailing to provide adequate toughness and ductility presented a similar behavior compared with that of OPC compression members with ductile detailing, giving a reduced cost to strength ratio.…”

Section: Introductionmentioning

confidence: 99%

On the Structural Performance of Recycled Aggregate Concrete Columns with Glass Fiber-Reinforced Composite Bars and Hoops

et al. 2021

View full text Add to dashboard Cite

Structural members comprising geopolymer recycled aggregate concrete (RAC) reinforced with glass fiber-reinforced polymer (GFRP) bars have not been investigated appropriately for axial compressive loading cases. The present study addresses this knowledge gap by evaluating the structural efficiency of GFRP-reinforced geopolymer recycled aggregate concrete (GGRAC)-based members subjected to axial compressive loading. A total of nine compressive members (250 mm in cross-section and 1150 mm in height) were constructed to examine the effect of the number of longitudinal GFRP bars and the vertical spacing of transverse GFRP hoops/ties. The experimental results portrayed that the ductility of GGRAC compressive members improved with the reduction in the pitch of GFRP hoops. The axial load-carrying capacity (LCC) of GGRAC compressive members increased by increasing the number of GFRP bars up to eight (corresponding to a reinforcement ratio of 2.11%) while it decreased by using ten longitudinal GFRP bars (corresponding to a reinforcement ratio of 2.65%). Additionally, an empirical model was suggested to predict the axial LCC of GGRAC compressive members based on a large amount of experimental data of similar members. The experimental results and related theoretical predictions substantially prove the applicability and accuracy of the proposed model. The proposed column represents a feasible structural member in terms of material availability and environmental sustainability.

show abstract

Behaviour of GGBS-dolomite geopolymer concrete short column under axial loading

Cited by 19 publications

References 10 publications

Behavior of Quarry Rock Dust, Fly Ash and Slag Based Geopolymer Concrete Columns Reinforced with Steel Fibers under Eccentric Loading

Behavior of Quarry Rock Dust, Fly Ash and Slag Based Geopolymer Concrete Columns Reinforced with Steel Fibers under Eccentric Loading

Mineral Slag used as an Alternative of Cement in Concrete

On the Structural Performance of Recycled Aggregate Concrete Columns with Glass Fiber-Reinforced Composite Bars and Hoops

Contact Info

Product

Resources

About