Effect of Fly Ash on Some Properties of Reactive Powder Concrete

Muhsin, Z; Fawzi, Nada Mahdi

doi:10.31026/j.eng.2021.11.03

Cited by 13 publications

(7 citation statements)

References 8 publications

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“…As shown in Figures (7), ( 8) and ( 9), the density value of geo-polymer mortar increased when the molarity increased from 8M to 12M because the density is a function of weight; therefore, an increase in molarity means an increase in the amount of solute in a fi xed volume, and on top the density increases [19].…”

Section: Dry Densitymentioning

confidence: 95%

“…Creating NaOH solutions at various concentrations -high volumes of sodium hydroxide flakes in distilled water were dissolved to produce different quantities with a purity of 98 per cent. The NaOH concentration usually varies from (5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16) in molarity [13]. The mass of solid sodium hydroxide in a solution changes depending on the concentration of the solution.…”

Section: Geopolymer Manufacturing Alkaline Solution Preparation For G...mentioning

confidence: 99%

“…Alumino-silicate-based raw materials that are rich in silicon (Si) and aluminum (Al) are utilized. Geopolymerization yields a greater solids concentration than alumino-silicate gels or zeolite synthesis [7].…”

Section: Introductionmentioning

confidence: 99%

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Impact of Sulfate in the Sand on the Absorption and Density of Metakaolin-Based Geopolymer Mortar

Thamer¹,

Al-Jaberi²

2023

J. Ecol. Eng.

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The advancement of cement alternatives in the construction materials field is fundamental to sustainable development. Geopolymer is the optimal substitute for ordinary portland cement, which produces 80% less CO 2 emissions. Metakaolin was used as one of the raw materials in the geopolymerization process. This research examined the influence of three different percentages of sulfate (0.00038, 1.532, and 16.24)% in sand per molarity of NaOH on the absorption and density of metakaolin-based geopolymer mortar (MK-GPM). Samples were prepared with two different molarities (8M and 12M) and cured at room temperature. The best results obtained for geopolymer mortar in the absorption and density test were (3.89%) and (2280 kg/m 3 ), respectively, recorded with 12M with the lowest sulfate content (0.00038%) at 90 days. Moreover, it has been observed that the absorption percentage increased along with sulfate content in the sand, and an inverse relationship was recorded between the increasing sulfate percentages in the sand and density values of (MK-GPM).

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Section: Dry Densitymentioning

confidence: 95%

Section: Geopolymer Manufacturing Alkaline Solution Preparation For G...mentioning

confidence: 99%

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Impact of Sulfate in the Sand on the Absorption and Density of Metakaolin-Based Geopolymer Mortar

Thamer¹,

Al-Jaberi²

2023

J. Ecol. Eng.

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“…The concrete's quasi-brittle properties and tensile destructive potential are greatly restored by short fibers [5]. When comparing RPC with traditional concrete, fiber inclusion improves its compressive strength characteristics [6]. When fibers are correctly connected in their hardened condition, they engage with the microcrack matrix at the microcrack level and efficiently bridge them.…”

Section: Introductionmentioning

confidence: 99%

Behavior of Reactive Powder Concrete reinforced with Hybrid Fibers containing Sustainable Materials

Hendi,

Aljalawi

2024

Eng. Technol. Appl. Sci. Res.

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This study investigates the behavior of recycled Reactive Powder Concrete (RPC), made from finely ground recycled raw materials and containing a certain percentage of recycled copper (electrical waste copper wire) and steel fibers. This concrete has a relatively low water-to-binder ratio and is composed of cement, fine aggregate, and ultrafine powders, such as quartz powder and silica fume. The properties of Fiber-Reinforced Reactive Powder Concrete (FR-RPC) containing micro-steel fibers, recycled copper fibers, and a mixture of steel-recycled and copper fibers were investigated. A micro-steel fiber RPC (MF1) was used as a reference mix, having 1% steel fibers by volume with 13 mm length and 0.2 mm diameter. Recycled copper fiber RPC (MF2) was prepared utilizing 1% recycled copper fibers by volume, with a diameter of 0.2 mm and a length of 10 mm. In addition, Hybrid FR-RPC (HFR-RPC) samples were prepared by mixing micro steel fibers and recycled copper fibers in proportions of 0.5-0.5% (MF3), 0.4-0.6% (MF4), and 0.3-0.7% (MF5), respectively. The compressive strength, flexural strength, and splitting tensile strength of these FR-RPC mixes were studied. The results displayed that MF3 achieved slightly lower compressive strength, flexural strength, and splitting tensile strength than MF1 and higher than MF2, MF4, and MF5. Although the mechanical strengths of MF3 were marginally lower than those of MF1, compressive strength, flexural strength, and splitting tensile strength were almost the same. Therefore, copper wire waste fibers can be employed along with steel fibers with excellent results.

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“…Additive fibers can improve concrete responsiveness under static and dynamic loads [15]. The cementitious compositions of RPC cause brittle failure in tension or compression, therefore fiber reinforcement is added [16,17]. The mechanism of bonding is activated when the cracks are crossed by conventional reinforcement.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Different Curing Methods on the Properties of Reactive Powder Concrete Reinforced with Various Fibers

Luti,

Abbas

2024

Eng. Technol. Appl. Sci. Res.

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The current study explores the effects of four curing methods on the strength of Reactive Powder Concrete (RPC) reinforced with different fibers. Four mixtures of RPC, reference (RM-RPC), wavy fiber reinforced (WF-RPC), carbon fiber reinforced (CF-RPC), and micro steel fiber reinforced (MF-RPC) mixes were prepared and cured following four curing methods (normal, autogenous, coating, and warm water). The results revealed that warm water curing achieved the highest values of compressive, flexural, and splitting strength, attaining 138.9 MPa 22.4 MPa, and 20.89 MPa, respectively. The results of using different fiber reinforcement displayed that the compressive strength of fiber-reinforced RPC mixes was notably higher than that of the RM-RPC. The compressive strength increase results were 9.04% for WF-RPC, 24% for CF-RPC, and 27.96% for MF-RPC regardless of the curing method adopted. Flexural strength increased by 21.2%, 38.47%, and 55.86% for WF-RPC, CF-RPC, and MF-RPC, accordingly in autogenous curing, whereas the change in flexural strength was 30.65%, 39.14%, and 36.59%, correspondingly in coating curing and 21.27%, 29.22%, and 39.55%, respectively, for warm water curing. The optimum flexural values were mainly obtained for MF-RPC regardless of the kind of curing used. CF-RPC almost achieved the same results as MF-RPC with slightly lower values. It can be concluded that fiber reinforcement had a more positive influence on the flexural and splitting strength of RPC than on the compressive strength.

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Effect of Fly Ash on Some Properties of Reactive Powder Concrete

Cited by 13 publications

References 8 publications

Impact of Sulfate in the Sand on the Absorption and Density of Metakaolin-Based Geopolymer Mortar

Impact of Sulfate in the Sand on the Absorption and Density of Metakaolin-Based Geopolymer Mortar

Behavior of Reactive Powder Concrete reinforced with Hybrid Fibers containing Sustainable Materials

The Effect of Different Curing Methods on the Properties of Reactive Powder Concrete Reinforced with Various Fibers

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