A Study on the Strength and Flowing Properties of the Non-Cement Inorganic Composite by Using Blast Furnace Slag and Red Mud

Lee, Sang Soo; Song, Ha Young; Lee, Yun Seong; Lee, Kang Pil

doi:10.4028/www.scientific.net/amr.261-263.491

Cited by 6 publications

(2 citation statements)

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“…After 28 days, the compressive strengths of SC100, SC80RM20, and SC80NTRM20 were 30.14, 25.91, and 19.98 MPa, respectively, indicating that the differences in the compressive strength increased as the age increased. This tendency of decreasing compressive strength owing to the addition of RM was the same as the tendency reported in other previous studies [25][26][27][28][29]. However, this tendency was significantly different from that reported by Ribeiro et al [10], who found that the density and compressive strength increased as the RM addition amount increased.…”

Section: Water Absorption Coefficientsupporting

confidence: 85%

Characterization of Slag Cement Mortar Containing Nonthermally Treated Dried Red Mud

2019

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In this study, a method was suggested to produce dried powder from red mud (RM) sludge with 40%-60% water content without heating. The RM sludge is discharged from the Bayer process, which is used to produce alumina from bauxite ores. Nonthermally treated RM (NTRM) powder was produced by mixing RM sludge (50%), paper sludge ash (PSA, 35%), and high-calcium fly ash (HCFA, 15%). The physicochemical properties of NTRM were investigated by analyzing its water content, X-ray fluorescence spectra, X-ray diffraction patterns, and particle size. Moreover, to examine the applicability of NTRM as a construction material, slag cement mortar in which 20 wt% of the binder was replaced with NTRM was produced, and the compressive strength, porosity, and water absorption rate of the mortar were evaluated. Results indicated that NTRM of acceptable quality was produced when the water content in RM sludge decreased and CaO contained in PSA and HCFA reacted with moisture and formed portlandite. The NTRM-mixed mortar requires further examination in terms of durability because of the increased capillary voids and high water absorption rate, but its compressive strength is sufficient to enable its use in sidewalks, bike roads, and parking lots.proposed optimal conditions for the RM substitution rate, sintering temperature, and sintering time. Ribeiro et al.[10] examined a method of utilizing RM in the production of ordinary Portland cement (OPC) mortar, and they reported that the workability of mortar decreased because of the addition of RM, but the water absorption rate could decrease and the compressive strength could increase when the RM substitution rate was 20% or less. Liu and Poon [11] confirmed that the addition of RM into self-compacting mortar had various benefits such as an increase in compressive and tensile strengths and a decrease in drying shrinkage. Moreover, Geng et al. [12] examined the production of geopolymers using RM.As described above, many researchers have made efforts to use RM as a construction material, but there are still several limitations in the production process used for such a material. In the production of ceramics using RM, an increase in the amount of RM leads to benefits such as an increase in the compressive strength of ceramics and a decrease in the water absorption rate because the presence of RM increases the vitreous phase in the ceramic matrix; however, the firing process used in production requires a high temperature of more than 900 • C [7]. In most studies that used RM as a base material for binders or geopolymers, dried RM powder was used. However, RM in the Bayer process is discharged in a slurry state with 40%-60% water content. Because water content in the RM sludge varies depending on the storage location or period, appropriate management of water content is necessary to use RM as a raw material [13]. Therefore, RM is turned into powder through a high-temperature drying process, which requires additional energy input. The cost increase resulting from this energy-intensive pretreatmen...

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Section: Water Absorption Coefficientsupporting

confidence: 85%

Characterization of Slag Cement Mortar Containing Nonthermally Treated Dried Red Mud

2019

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“…As for chemical soil stabilization, cement and lime is consider as traditional stabilizer [Abdila et al,2022]. The use of GGBS(Ground granulated blast furnace slag), bottom ash, fly ash, silica fume is term as non-traditional chemical stabilization [Lee et al,2011]. With the advancement of research, industrial by-product like fly ash, ggbs, kaolinite clay etc.…”

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Transforming Soil Stabilization: Paving the way for Sustainable Development

Journal

2024

IJSREM

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The history of soil stabilization techniques unveils a narrative dominated by a pursuit of immediate development gains, often at the expense of environmental considerations. In its nascent stages, conventional methods employing lime, cement, and similar agents were championed for their efficacy in achieving structural objectives, relegating environmental concerns to the periphery. Over time, the continued reliance on these methods led to an eye seeing escalation in environmental impacts, painting a sombre picture of unintended consequences. As years passed, the unrelenting use of these conventional techniques intensified the environmental toll, demanding a critical re-evaluation of the status quo. However, the allure of rapid achievement continued to overshadow the imperative for sustainable alternatives. The environment bore the brunt of this persistent inertia, as degradation became more pronounced. In the wake of technological advancements, a promising model shift has emerged in the realm of soil stabilization. The focus now lies in forging pathways that balance the imperatives of development with the imperative of safeguarding our fragile ecosystems. Central to this evolution are the advent and refinement of sustainable techniques, including the utilization of biopolymers, geo-polymers, bio-cementation, and natural fibres. These innovations signify a departure from the environmentally taxing conventional agents, promising a more harmonious coexistence with nature. This paper summarizes the trans-formative journey of soil stabilization techniques, predicting a shift towards a more sustainable and environmentally considerate approach. Through the adoption of these nature-friendly methodologies, we embark on a trajectory where development and environmental preservation are no longer dissimilar goals, but rather easily intertwined work. Keywords: Soil stabilization; Environmental considerations, Geopolymers, Biopolymers.

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Impact of superplasticizer on the hardening of slag Portland cement blended with red mud

Fujii

Torres

Romano

et al. 2015

Construction and Building Materials

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A Study on the Strength and Flowing Properties of the Non-Cement Inorganic Composite by Using Blast Furnace Slag and Red Mud

Cited by 6 publications

References 0 publications

Characterization of Slag Cement Mortar Containing Nonthermally Treated Dried Red Mud

Characterization of Slag Cement Mortar Containing Nonthermally Treated Dried Red Mud

Transforming Soil Stabilization: Paving the way for Sustainable Development

Impact of superplasticizer on the hardening of slag Portland cement blended with red mud

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