Mechanical and durability behaviour of roller-compacted concrete containing white cement by pass dust and polypropylene fibre

Ashteyat, Ahmed M.; Rjoub, Yousef S. Al; Murad, Yasmin; Asaad, Samaher A.

doi:10.1080/19648189.2019.1652694

Cited by 22 publications

(11 citation statements)

References 36 publications

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“…Table 4 summarize the mathematical models obtained for roller compacted concrete. Similar behavior was reported by Ashteyat et al, [17].…”

Section: Porositysupporting

confidence: 91%

Correlating the Durability Properties of Roller Compacted Concrete

Sarsam¹

2021

CEBACOM

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Roller compacted concrete is the zero-slump concrete mixture, usually prepared at low cement content and low workability, and subjected to compaction by rollers to increase the density and improve the aggregate particles interlock. It is recommended for heavy duty pavement and can withstand harsh environment. Modeling the physical behavior of roller compacted concrete exhibits a quick and easy start to predict the future behavior of the material. In the present assessment, roller compacted concrete mixtures have been prepared in the laboratory using three percentages of Portland cement (10, 12, and 16) % to simulate low, medium, and high cement content from roller compacted concrete point of view. The mixtures were poured into the cylinder mold of 101.6 mm diameter and 116.4 mm height in five successive layers. Each layer had practiced 25 blows of the modified Proctor hammer with 4.5 kg weight, falling from 450 mm height. Specimens were withdrawn from the mold after 24 hours and cured for 28 days in a water bath at 20°C. Specimens were subjected to bulk density, absorption, and porosity determination. Test results were analyzed and modeled. It can be observed that the gradation of aggregates (dense or gap)does not exhibit a significant issue in the absorption-density relationship. However, Dense gradation exhibits lower porosity than gap gradation. It can be concluded that the obtained mathematical models may be implemented to predict the relationship between the durability parameters of roller compacted concrete in terms of porosity, absorption, and density with high coefficients of determination.

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“…Table 4 summarize the mathematical models obtained for roller compacted concrete. Similar behavior was reported by Ashteyat et al, [17].…”

Section: Porositysupporting

confidence: 91%

Correlating the Durability Properties of Roller Compacted Concrete

Sarsam¹

2021

CEBACOM

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“…When fumed silica was implemented as partial replacement of Portland cement, the flexural strength declines as the percentage of replacement increases regardless of the aggregate's gradation type. Similar behavior was reported by Ashteyat et al, [5]. The flexural strength decreased by (50, 64.6, and 77) % and (0.1, 30.8, and 63.5) % after replacement of (5, 7, and 10) % of cement by fumed silica for dense and gap graded aggregates respectively.…”

Section: Figure 1 Roller Compaction Processsupporting

confidence: 88%

“…It was revealed that nano-silica partially ignited the pozzolanic activity of fly ash at early ages and can leads to higher performance of roller compacted concrete at early age. Ashteyat et al, [5] stated that increasing white cement bypass dust replacement ratio to more than 10% can result in degrading the mechanical properties (compressive strength, splitting tensile strength and modulus of elasticity) of mixtures. Zabihia and Nejad, [6] revealed that the flexural strength test results of roller compacted concrete indicate that adding polypropylene fiber causes improvement in flexural strength samples and more enhancement can be achieved in combination with pozzolanic materials.…”

Section: Introductionmentioning

confidence: 99%

Influence of Additives on Flexural Strength of Roller Compacted Concrete

Sarsam¹

2021

CEBACOM

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Roller compacted concrete is considered as a sustainable solution. In the present investigation, three types of additives namely (fly ash, fumed silica, and hydrated lime) are implemented as partial replacement of Portland cement for preparation of roller compacted concrete slab samples using dense and gap aggregate gradation. The slab samples were prepared at optimum cement requirement of 12 % and at (2 and 4) % cement below and above the optimum. Beam specimens of (38 x 10 x 8) Cm were extracted from the slab samples using diamond saw. The specimens were subjected to flexural strength determination using two testing modes, the three and the four points loading. It was noticed that the flexural strength under four-points loading mode is lower by a range of (0.787 to 0.732) folds than that under three-points loading mode for dense and gap graded mixtures respectively. It was concluded that the flexural strength increases by (96.2, 84, and 17.2) % and (109, 86, and 9.3) % after replacement of (10, 12, and 15) % of cement by hydrated lime while it declines by (50, 64.6, and 77) % and (0.1, 30.8, and 63.5) % after replacement of (5, 7, and 10) % of cement by fumed silica for dense and gap graded aggregates respectively. The flexural strength of dense graded mixtures increases by 63 % at 20 % replacement by fly ash, however, it increases by (99.7, 53.8, and 1.0) % after replacement of (10, 12, and 15) % of cement by fly ash for gap graded aggregates respectively.

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“…Li et al [2] used Portland cement and ferronickel slag with only 6.56% Al 2 O 3 to prepare mortar and found the existence of the monocarboaluminate after 3 and 240 days of hydration, but the diffraction peaks of it were indistinguishable due to the limited amorphous Al content of the ferronickel slag. Kim et al [37] utilized superfine ferronickel slag with abundant MgO and Al 2 O 3 as a replacement for the cement and discovered a high amount of hydrotalcite (Mg 6 Al 2 (CO 3 )(OH) 16 •4H 2 O) by the XRD measurement.…”

Section: Phase Compositionmentioning

confidence: 99%

“…Some major bridges such as landmark cable-stayed bridges and suspension bridges are expected to have white and clean bridge towers constructed chiefly of white Portland cement (WPC). On the other hand, there are strict requirements for the selection of raw materials [15], the calcination temperature, and fineness of particles during the production of WPC [16]. Moreover, producing the WPC massively consumes a great deal of energy and emits a huge amount of carbon dioxide; meanwhile, the cost of construction increases by the high price of the WPC [17].…”

Section: Introductionmentioning

confidence: 99%

Recycling Blast Furnace Ferronickel Slag as a Replacement for Paste in Mortar: Formation of Carboaluminate, Reduction of White Portland Cement, and Increase in Strength

et al. 2021

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Blast furnace ferronickel slag (BFFS) is generated in the production of ferronickel alloys and is used as cement replacement in concrete or mortar. The effectivity in reducing cement consumption and improving performance are limited. By referring to the paste replacement method, this work used BFFS to replace an equal volume of the white Portland cement paste to obtain greater performance enhancement. BFFS was used with five levels of replacement (0%, 5%, 10%, 15%, 20%) and four water-to-cement ratios (0.40, 0.45, 0.50, 0.55) were designed. Fluidity, mechanical strength, hydration products, and pore structure of every mixture were measured. The results showed that the workability of the mortars decreased due to the reduced volume of water, but the 28-day compressive strength of the mortars increased, and the cement content of the mortars was also reduced by 33 wt %. The X-ray diffraction (XRD) patterns revealed that there existed a carboaluminate phase, and the presence of the ettringite was stabilized, indicating that the accumulating amount of the hydration products of the mortar increased. Furthermore, the BFFS could consume the portlandite and free water to form a higher amount of chemically bound water due to its pozzolanic activity. A high degree of hydration and a large volume of the hydration products refined the porosity of the hardened mortars, which explained the enhancement of the strength of the mortars. Compared to the cement replacement method, the paste replacement method was more effective in preparing eco-friendly mortar or concrete by recycling BFFS for reducing the cement content of the mortar while improving its strength.

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Mechanical and durability behaviour of roller-compacted concrete containing white cement by pass dust and polypropylene fibre

Cited by 22 publications

References 36 publications

Correlating the Durability Properties of Roller Compacted Concrete

Correlating the Durability Properties of Roller Compacted Concrete

Influence of Additives on Flexural Strength of Roller Compacted Concrete

Recycling Blast Furnace Ferronickel Slag as a Replacement for Paste in Mortar: Formation of Carboaluminate, Reduction of White Portland Cement, and Increase in Strength

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