Experimental Water Quality Analysis from the Use of High Sulfuric Fly Ash as Base Course Material for Road Building

Duc, Nguyen Viet

doi:10.48084/etasr.2991

Cited by 4 publications

(2 citation statements)

References 12 publications

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“…Geopolymers have been reported to leach metals and metalloids such as arsenic, chromium, and lead, which can pose a risk to human health and the environment. [11] Pavement damage, such as potholes, often penetrates the base course layer.…”

Section: Introductionmentioning

confidence: 99%

Base Course Stabilization Performance Using Fly Ash-Based Geopolymers and Their Effect on Water Quality Standards

Widarto

Suparma

Siswosukarto

2023

U Karst

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The road is the main gateway to human life and links essential access points. Some structure pavement failures happened due to the base layer's instability. Fly ash has been used in several parts of pavement structures to increase stability. One significant concern with using fly ash in base course stabilization is its proportion and potential impact on water quality standards. This research aimed to evaluate base course stabilization performance using fly ash-based geopolymers, as well as assess their impact on water quality standards. Materials in this study consisted of aggregate, fly ash, water, and alkaline reagent solutions. The variation of mix considered with a variety of alkaline reagents, namely without alkaline reagents, 3 mol, 6 mol, 9 mol, and 12 mol of NaOH. The ratio between NaOH and Na2SiO3 is 1:2. The use of fly ash in the class A aggregate base course layer has not been able to meet specifications. However, by providing 9 mol of alkaline reagent, the strength of the mixture increases so that the CBR value meets the specifications due to geopolymer bonding. When the alkaline reagent solution becomes more concentrated, the optimum water content decreases, and the bond between aggregates strengthens. The effect of alkaline reagents on water quality standards increases the acidity (pH) value, while other parameters such as BOD, COD, and TSS still meet the standards. This research point to another practical approach that is effective in the field to increase the stability of the base course layer and is environmentally friendly.

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Section: Introductionmentioning

confidence: 99%

Base Course Stabilization Performance Using Fly Ash-Based Geopolymers and Their Effect on Water Quality Standards

Widarto

Suparma

Siswosukarto

2023

U Karst

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“…), flue gas desulfurization waste, construction demolition wastes, slags from metal smelting, pulp, and paper mill waste, etc. can contain high amounts of sulfate. − Therefore, the utilization of these types of wastes especially HSFA in cementitious systems requires careful consideration and management to ensure that the negative effects of the high sulfur content are minimized for potential problems regarding deterioration and environmental safety of construction materials. Reduction of hazardous characteristics can be achieved using appropriate mix designs, washing techniques, , or the incorporation of additives such as hydraulic binders, i.e., amorphous calcium aluminate (CA). ,− Trincal et al tested various experimental binders for their effectiveness in reducing sulfate leaching from soils with high gypsum content (maximum of 34 wt %) .…”

Section: Introductionmentioning

confidence: 99%

Carbonation and Leaching Behaviors of Cement-Free Monoliths Based on High-Sulfur Fly Ashes with the Incorporation of Amorphous Calcium Aluminate

Usta,

Yörük,

Uibu

et al. 2023

ACS Omega

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The high sulfate content in various alkaline wastes, including those from fossil fuel and biomass combustion, and other industrial processes, necessitates careful management when used in cementitious systems to prevent potential deterioration of construction materials and environmental safety concerns. This study explores the under-researched area of high-sulfur fly ash (HSFA) utilization in the production of cement-free monoliths through accelerated carbonation and further examines the effect of niobium slag (NS)a calcium aluminate-containing slagas an additive on the strength development and the mobility of SO4 2–. The methodology involves mineralogical and microstructural analyses of monoliths before and after carbonation, accounting for the effects of accelerated carbonation treatment and NS addition. The findings suggest that accelerated carbonation significantly improves the initial compressive strength of the HSFA monoliths and generally immobilizes heavy metals, while the effect on sulfate immobilization can vary depending on the ash composition. Moreover, the addition of NS further enhances strength without substantially hindering CO2 uptake, while reducing the leaching values, particularly of sulfates and heavy metals. These findings suggest that it is feasible to use calcium aluminate-containing NS in HSFA-based carbonated monoliths to immobilize sulfates without compromising the strength development derived from carbonation. This research contributes to the understanding of how accelerated carbonation and NS addition can enhance the performance of HSFA-based materials, providing valuable insights for the development of sustainable construction materials.

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GIS-Based Analysis of a Rainwater Harvesting System in the Multipurpose Hall of Quaid-e-Awam University of Engineering, Science, and Technology

Kumar

Mukwana

Jatoi

et al. 2022

Eng. Technol. Appl. Sci. Res.

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Drinking water availability has become a major issue. Rainwater Harvesting Systems (RHSs) amass and store rainwater for future use. In Pakistan, drinking water availability has become a major issue. Rainwater can be used as a constant alternative to clean water resources. Google Earth Pro (GEP) is utilized in this paper to select suitable locations for the installation of RHSs. The decision must not be too excessive, must fit in buildings that have small available space, and must cover the needs of bigger buildings. The required capacity for an RHS to cope with an unusually high water shortage in the study area was calculated using GEP and ArcGIS. The total estimated amount of rainwater harvesting potential during the average annual monsoon period from 2012 to 2021 is 1064.056 m3 from the 13452.05 m2 available area from rooftops and plain surfaces. The capacity of storage containers is primarily based on day-to-day spills and breadth.

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Experimental Water Quality Analysis from the Use of High Sulfuric Fly Ash as Base Course Material for Road Building

Cited by 4 publications

References 12 publications

Base Course Stabilization Performance Using Fly Ash-Based Geopolymers and Their Effect on Water Quality Standards

Base Course Stabilization Performance Using Fly Ash-Based Geopolymers and Their Effect on Water Quality Standards

Carbonation and Leaching Behaviors of Cement-Free Monoliths Based on High-Sulfur Fly Ashes with the Incorporation of Amorphous Calcium Aluminate

GIS-Based Analysis of a Rainwater Harvesting System in the Multipurpose Hall of Quaid-e-Awam University of Engineering, Science, and Technology

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