Effects of HPMC on Workability and Mechanical Properties of Concrete Using Iron Tailings as Aggregates

Gu, Xiaowei; Li, Xiaohui; Zhang, Weifeng; Gao, Yuxin; Kong, Yaning; Liu, Jianping; Zhang, Xinlong

doi:10.3390/ma14216451

Cited by 16 publications

(4 citation statements)

References 36 publications

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“…When investigating aggregates optically, the presence of bioclasts, the type of matrix, texture, and microfractures are all important factors to analyze. Porosity has a significant impact on the physical properties of rock aggregates [16]. Mineralogy and texture are imperative features that influence a material's physical resistance to crushing, abrasion, volume change, and chemical decomposition.…”

Section: Introductionmentioning

confidence: 99%

Resource Assessment of Limestone Based on Engineering and Petrographic Analysis

et al. 2022

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The China-Pakistan Economic Corridor (CPEC) is a massive in-progress construction project in Pakistan that connects more than 70 countries via multiple trade channels such as highways, railways, roads, and fiber optics. This project also involves the development of local infrastructure and industrial zones in Pakistan, which demands the discovery of new resources of aggregate to facilitate the construction. Therefore, physical characterization research was carried out on the Kirman hill region (Jurassic limestone), District Kurram, Pakistan, to investigate their suitability for utilization as construction materials using site investigation and laboratory studies. The results outline that all typical engineering parameters are within acceptable limits set by international standards like BS, ASTM, and AASHTO. Bituminous tests revealed that Jurassic limestone is appropriate as an aggregate for asphalt wearing coarse. Likewise, the petrographic study performed shows proper matching with engineering tests. The petrographic analysis of Jurassic limestone showed a minute amount of deleterious content; as a result, it is resistant to Alkali silica reaction (ASR) and Alkali carbonate reaction (ACR) expansions. Based on engineering and petrographic analysis, the Jurassic limestone, Kirman hill region, District Kurram, Pakistan is recommended as a potential aggregate for (i.e., base course, subbase course, cement concrete, and asphalt) and other mega and minor civil construction projects. Doi: 10.28991/CEJ-2022-08-03-02 Full Text: PDF

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Section: Introductionmentioning

confidence: 99%

Resource Assessment of Limestone Based on Engineering and Petrographic Analysis

et al. 2022

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“…[4] The physical properties of the tailings have a significant impact on the workability, density, dimensional stability, strength, and durability of the concrete. The physical properties of the tailings have a significant impact on the workability, density, dimensional stability, strength, and durability of the concrete [5,6]. It is estimated that 400 kg of tailings is produced for each ton of beneficiated iron ore.…”

Section: Introductionmentioning

confidence: 99%

Replacement of Fine Aggregate by Iron Ore Tailing (IOT) in Concrete for Sustainable Development

George¹

2023

E3S Web Conf.

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An increase in iron ore processing to meet the global demand has resulted in the generation of billions of tons of iron ore tailings (IOT). Also, the increase in construction activities has led to the over exploitation of river beds for sand. In this present study, fine aggregates are replaced by iron ore tailings in M20 grade concrete at varying percentages of 20%,30%,40%,50%,60%. The cubes and cylinders were casted and their compressive strength and split tensile strength were evaluated for 7 days and 28 days. It is observed from the test results that the iron ore tailings aggregate concrete exhibited a good mechanical strength compared to the control mix. The compressive strength has increased with the increase in replacement of iron ore tailings in concrete, which has shown an improvement of 18.41% over conventional aggregate concrete. An incremental increase of 10.3 % was observed in the case of split tensile strength for 60 % replacement of fine aggregate with iron ore tailings.

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“…In cementitious materials, workability, durability, and mechanical properties are essential for quantifying the performance of structures [1][2][3][4][5][6][7]. Furthermore, to ensure the quality and long-term performance of facilities made from cement-based materials, determination of the early-age properties of such materials is important [8].…”

Section: Introductionmentioning

confidence: 99%

Setting Times of Early-Age Mortars Determined from Evolution Curves of Poisson’s Ratio

Bate

Chen

et al. 2022

Materials

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Setting times, as the early-age properties of cement-based materials, are important properties to ensure the quality and long-term performance of engineering structures. To determine the initial and final setting times of cementitious materials, the compressive wave velocity and shear wave velocity of six early-age mortar samples were monitored. Their time evolution curves of Young’s modulus, shear modulus, bulk modulus, and Poisson’s ratio were then calculated and analyzed. The signature times of the derivatives of the Poisson’s ratio evolution curves correlate well with the initial and final setting times, and the remarkably high coefficient of determination values relative to the data from this study are higher than those presented in the current literature. The proposed derivative method on the Poisson’s ratio evolution curve is as good as the derivative methods from vs. evolution curves used by prior studies for the estimation of both the initial and final setting times of the early-age properties of cement-based materials. The formation and subsequent disappearance of ettringite of low Poisson’s ratio were postulated to cause the initial dip in the Poisson’s ratio evolution curves.

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Effects of HPMC on Workability and Mechanical Properties of Concrete Using Iron Tailings as Aggregates

Cited by 16 publications

References 36 publications

Resource Assessment of Limestone Based on Engineering and Petrographic Analysis

Resource Assessment of Limestone Based on Engineering and Petrographic Analysis

Replacement of Fine Aggregate by Iron Ore Tailing (IOT) in Concrete for Sustainable Development

Setting Times of Early-Age Mortars Determined from Evolution Curves of Poisson’s Ratio

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