Hospital Ash Waste-Ordinary Portland Cement Concrete

Elinwa, Augustine Uchechukwu

doi:10.11648/j.sr.20160403.11

Cited by 18 publications

(7 citation statements)

References 14 publications

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“…The CaO content of the cement was approximately 61 %. This had cementing effect [20]. The cement had a SiO 2 content of approximately 20 %.…”

Section: Characteristics Of the Materialsmentioning

confidence: 98%

X-Ray And Microstructure Of Rice Husk Ash-Admixed Concrete

Elinwa

2023

EMSR

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Morphological changes which occured during the hydration of concrete containing rice husk ash (RHA) and Conplast SP 430 admixture (CP-admixture) were observed. X-ray analyses were used to identify phases, while the scanning electron microscope (SEM) analyses were used for the corresponding changes in microstructure with changes in the physical and mechanical properties. The effects of the admixtures and RHA on the concrete samples were investigated with and without Conplast SP 430. RHA was at 10 % replacement by wt. % of cement, and the dosage of admixture was 5.7 ml by wt. % of cement, and the water to cement ratio was 0.5. The results clearly showed the morphological changes that took place as hydration proceeded and showed the speci c in uences of each of the two admixtures. The additions of RHA and CP-admixture or both, modi ed the pore network and the composition of the main hydration product.

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“…The CaO content of the cement was approximately 61 %. This had cementing effect [20]. The cement had a SiO 2 content of approximately 20 %.…”

Section: Characteristics Of the Materialsmentioning

confidence: 98%

X-Ray And Microstructure Of Rice Husk Ash-Admixed Concrete

Elinwa

2023

EMSR

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“…Substituting CWA for concrete lowers the flexural strength value, making hospital waste Ash is a durable construction material used in concrete manufacturing. Elinwa ( 2016 ) investigated that the CWA had a high CaO content (47%), making it suitable for cement production. Besides, concrete cubes were made with CWA proportions varying from 0 to 40% by weight of cement, and the ideal replacement is 10%.…”

Section: Applicationsmentioning

confidence: 99%

An Overview of Characterisation, Utilisation, and Leachate Analysis of Clinical Waste Incineration Ash

Ghazali

Johari²,

Fauzi³

2022

Int J Environ Res

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As industrial globalisation and waste output continue to grow, solid waste management is one of the most pressing worldwide environmental challenges. Solid wastes include both the heterogeneous mass of urban throwaways and the homogeneous accumulations of agricultural, industrial, and mineral wastes. Clinical waste (CW) has a significant negative influence on both human health and the environment. To dispose hazardous CW, a proper waste management system should be necessary, and incineration should be the best possible option for reducing the volume of this hazardous waste. Incineration is being developed in Malaysia as a means of disposing clinical and hazardous waste. Currently, 170 common CW treatment facilities with 140 incinerators are accessible around the country. The combustion procedure kills pathogens and reduces waste volume and weight, but it leaves a solid residue known as clinical waste ash (CWA), which raises heavy metal, inorganic salt, and organic compound levels in the environment. Because metals are not eliminated during incineration, dumping CWA in a landfill could contaminate groundwater. Leachate is the liquid created when waste decomposes in a landfill and water filters through it. The most common method of disposing of CW ashes is to transfer them to a landfill. Landfills should install a top cover after closure for hazardous waste landfills. Due to a lack of space and the high expense of land disposal, recycling technologies and the reuse of ash in various systems have developed. Clinical waste incineration fly ash (CWIFA), a solid waste substance from CW incineration, typically includes mobile heavy metals and can cause significant pollution when reused. The standard requirement for removing CWIFA in dumpsites should be below the metal limit stated by the U.S. Environmental Protection Agency (USEPA). Much recent research on the usage of CWIFA has concentrated on mitigating their effects on the environment. Several studies have confirmed the utilisation of CWIFA in the construction field and agriculture to reduce the leaching of its hazardous components into the environment. Compressive strength decreased with the percentage amount of CWIFA due to the substitution of cement with CWIFA. CWIFA mix with 20% cement is the broad-scale application of CWIFA for geotechnical constructions. Heavy metals (Cd, Cu, Ni, Pb, and Zn) are strongly immobilised by the cementitious matrix. Solidification/stabilisation (S/S) materials can be dumped in landfills with less environmental protection than untreated waste. When utilising a CWIFA in mortar, the primary environmental concern is if any harmful materials leach out during the initial curing process or throughout the life of the mortar. Toxicity characteristic of leaching procedure (TCLP) analysis of all CWIFA specimens found amounts of heavy metals below regulatory limits. Solidification of waste with cement and solidified waste has become a popular way of minimising the atmosphere's emissions. The amount of CWIFA generated is expected to increas...

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“…This makes it easier to reduce the amount of waste by 80 to 95%. The combustion, however, eventually results in the creation of secondary waste, i.e., incinerated biomedical waste ash (IBWA) [26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Utilisation of waste glass powder to improve the performance of hazardous incinerated biomedical waste ash geopolymer concrete

Kumar

Muthukannan

Arunkumar

et al. 2021

Innov. Infrastruct. Solut.

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A mixture of hazardous waste from various places, including hospitals, testing facilities, clinics, etc., is a biomedical waste. It is possible that eventually, there could be a significant risk to human lives and the survival of plant and animal life on this planet from hazardous biomedical waste disposal. Biomedical waste is usually burnt at an incineration plant and produces ash called incinerated biomedical waste ash (IBWA). If IBWA is not disposed correctly, it may contaminate the groundwater because heavy metals not eliminated during the incineration process. The groundwater contamination problem due to IBWA may be minimised using geopolymer concrete (GPC). When discussing pollution and the environment, another big issue involves waste glass. There was a rise in the quantity of waste glass generated each day, and the recycling region is restricted. To minimise this issue, we can exploit the waste glass powder in the construction sectors. The substitute for cement concrete is geopolymer concrete which was predominantly manufactured from renewable resources. This research work aims to produce the geopolymer concrete at room temperature. The ground-granulated blast-furnace slag (GGBS) with IBWA ratio is fixed as 70:30, and the fine aggregate (M-Sand) is replaced with varying the glass powder as 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45% and 50% have been done and cured under ambient curing. The addition of IBWA and glass powder has been performed to increase the reactivity and performance of geopolymer concrete. KeywordsGeopolymer concrete • Incinerated biomedical waste ash • GGBS • Waste glass powder • Mechanical properties • Rheological properties

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Hospital Ash Waste-Ordinary Portland Cement Concrete

Cited by 18 publications

References 14 publications

X-Ray And Microstructure Of Rice Husk Ash-Admixed Concrete

X-Ray And Microstructure Of Rice Husk Ash-Admixed Concrete

An Overview of Characterisation, Utilisation, and Leachate Analysis of Clinical Waste Incineration Ash

Utilisation of waste glass powder to improve the performance of hazardous incinerated biomedical waste ash geopolymer concrete

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