Effects of Steel Fibers (SF) and Ground Granulated Blast Furnace Slag (GGBS) on Recycled Aggregate Concrete

Ahmad, Jawad; Martínez‐García, Rebeca; Szeląg, Maciej; de‐Prado‐Gil, Jesús; Marzouki, Riadh; Alqurashi, Muwaffaq; Hussein, Enas E.

doi:10.3390/ma14247497

Cited by 30 publications

(30 citation statements)

References 47 publications

(75 reference statements)

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“…Ground Granulated Blast-furnace Slag (GGBS) is the by-product of the steel and ironmaking industry, was employed as a partial replacement for cement to reduce carbon footprints, along with that, it has improved the surface finishing while casting the conventional concrete [11]. But the integration of GGBS in pervious concrete was hardly investigated since concrete with 70 % GGBS is more impermeable than PPC concrete (concrete with fly ash) or pure OPC concrete [12].…”

Section: Introductionmentioning

confidence: 99%

WITHDRAWN: Implementation of soft computing techniques in forecasting compressive strength and permeability of pervious concrete blended with GGBS

kumar

2022

Preprint

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Due to the associated economic, environmental, and performance advantages, using natural pozzolans as a substitute for cement is regarded as a standard guidelines in the construction sector. In order to achieve, it is beneficial to use GGBS in the production of concrete, which was identified as the most effective supplementary cementitious material in resisting environmental threats. According to the literature review, GGBS concrete is more impermeable than PPC concrete (concrete with fly ash) or pure OPC concrete. However, it has the potential to increase the strength of concrete, which is a significant disadvantage of pervious concrete. Hence this study investigates the variation of strength and permeability of pervious concrete in order to obtain the optimal proportion of GGBS inclusion in concrete production. Along with that, the research uses artificial neural networks to estimate the compressive strength, water permeability, and porosity of pervious concrete blended with several proportions of GGBS. The study results showed that the inclusion of larger aggregate sizes significantly increased the strength but the effect of adding GGBS in partial replacement of cement could not. As a result, GGBS might replace some of the cement in concrete without significantly altering its mechanical qualities. Further, the developed ANN models outperformed the conventional MLR model and it can act as a useful alternative to analytical models for predicting strength and permeability values in pervious concrete.

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Section: Introductionmentioning

confidence: 99%

WITHDRAWN: Implementation of soft computing techniques in forecasting compressive strength and permeability of pervious concrete blended with GGBS

kumar

2022

Preprint

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“…Development of new strain-hardening inorganic composite can be in mixture composition and in manufacturing technology. In study of mixture compositions the following results were obtained: the use of microfiber in the amount of 2% by volume or more [51][52][53][54][55]; the use of rheologically active mineral additives in cement matrices with a superplasticizer to ensure workability at low W/C ratio and at high microfiber amount [56,57]; the use of mineral additives that improve workability and setting time in alkali-activated slag matrices [58][59][60][61]; the use of quartz sand with a low fineness modulus as a fine aggregate to obtain a homogeneous matrix and ensure a dense and uniform contact of matrix with the microfiber surface [62][63][64][65][66][67][68]. Manufacturing technology takes into account: the sequence of addition of components into a mixture [69][70][71][72][73]; mixing modes [62,[74][75][76][77].…”

Section: Manufacturing Proceduresmentioning

confidence: 99%

Strain Hardening of Polypropylene Microfiber Reinforced Composite Based on Alkali-Activated Slag Matrix

Smirnova

Pidal²,

Alekseev³

et al. 2022

Materials

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A comparative study of the fracture features, strength and deformation properties of pseudo strain-hardening composites based on alkali-activated slag and Portland cement matrices with polypropylene microfiber was carried out. Correlations between their compositions and characteristics of stress–strain diagrams under tension in bending with an additional determination of acoustic emission parameters were determined. An average strength alkali-activated slag matrix with compressive strength of 40 MPa and a high-strength Portland cement matrix with compressive strength of 70 MPa were used. The matrix compositions were selected for high filling the composites with polypropylene microfiber in the amount of 5%-vol. and 3.5%-vol. ensuring the workability at the low water-to-binder ratios of 0.22 and 0.3 for Portland cement and alkali-activated slag matrices, respectively. Deformation diagrams were obtained for all studied compositions. Peaks in the number of acoustic signals in alkali-activated slag composites were observed only in the strain-softening zone. Graphs of dependence of the rate of acoustic events occurrence in samples from the start of the test experimentally prove that this method of non-destructive testing can be used to monitor structures based on strain-hardening composites.

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“…As of 2005, the overall worldwide waste glass manufacture valuation was 130 Mt, in which the European Union, China, and the USA manufactured roughly 33 Mt, 32 Mt, and 20 Mt, respectively [20]. As glass is nonrecyclable, glass-dumping in a landfill creates an environmental problem.…”

Section: Introductionmentioning

confidence: 99%

Concrete with Partial Substitution of Waste Glass and Recycled Concrete Aggregate

et al. 2022

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The current practice of concrete is thought to be unsuitable because it consumes large amounts of cement, sand, and aggregate, which causes depletion of natural resources. In this study, a step towards sustainable concrete was made by utilizing recycled concrete aggregate (RCA) as a coarse aggregate. However, researchers show that RCA causes a decrease in the performance of concrete due to porous nature. In this study, waste glass (WG) was used as a filler material that filled the voids between RCA to offset its negative impact on concrete performance. The substitution ratio of WG was 10, 20, or 30% by weight of cement, and RCA was 20, 40, and 60% by weight of coarse aggregate. The slump cone test was used to assess the fresh property, while compressive, split tensile, and punching strength were used to assess the mechanical performance. Test results indicated that the workability of concrete decreased with substitution of WG and RCA while mechanical performance improved up to a certain limit and then decreased due to lack of workability. Furthermore, a statical tool response surface methodology was used to predict various strength properties and optimization of RCA and WG.

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Effects of Steel Fibers (SF) and Ground Granulated Blast Furnace Slag (GGBS) on Recycled Aggregate Concrete

Cited by 30 publications

References 47 publications

WITHDRAWN: Implementation of soft computing techniques in forecasting compressive strength and permeability of pervious concrete blended with GGBS

WITHDRAWN: Implementation of soft computing techniques in forecasting compressive strength and permeability of pervious concrete blended with GGBS

Strain Hardening of Polypropylene Microfiber Reinforced Composite Based on Alkali-Activated Slag Matrix

Concrete with Partial Substitution of Waste Glass and Recycled Concrete Aggregate

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