Accumulation Of Waste Materials Research Articles

Fire Resistance of Lightweight Aggregate Concrete Containing Spent Garnet as Partial Fine Aggregate Replacement

Introduction The escalating demand for concrete, driven by global infrastructure development, poses significant challenges to environmental sustainability due to the depletion of natural resources and the accumulation of waste materials. This paper explores the potential of utilizing waste materials, particularly palm oil clinker (POC) and spent garnets, as sustainable alternatives in concrete production. The depletion of natural aggregates, such as river sand, coupled with the environmental hazards associated with waste disposal, underscores the urgent need for eco-friendly solutions in construction materials. POC, derived from palm oil production waste, and spent garnets from abrasive industries offer promising avenues for reducing environmental impact and enhancing sustainability in concrete production. By addressing the dual challenges of resource depletion and waste management, this research aims to contribute to developing greener construction practices and mitigating environmental degradation. Aims This study aims to investigate the effects of incorporating spent garnet as a partial fine aggregate replacement on the fire resistance of POC LWAC. By examining the interplay between spent garnet inclusion and fire resistance, the research contributes to developing more sustainable concrete formulations and aids in industrial waste management practices, addressing critical societal and environmental challenges. Methods This study investigates the effects of elevated temperatures on the compressive strength and durability of POC LWAC specimens. Concrete specimens were demoulded after 24 hours of curing and submerged in water for 28 days. Compressive strength and water absorption tests were conducted at the end of the curing period. Subsequently, specimens were subjected to temperatures of 300 °C, 500 °C, and 700 °C for 1 hour in a furnace. After cooling naturally for 24 hours, visual inspection, mass reduction analysis, and evaluation of residual compressive strength were performed. Results Results indicate that 20% garnet replacement yields the highest compressive strength due to pore filling and denser structure. Higher garnet levels lead to reduced strength and increased water absorption. Visual assessment post-heating shows surface alterations, with 20% garnet exhibiting the lowest mass loss and strength reduction at elevated temperatures. Conclusion Notably, specimens containing 20% spent garnet in POC LWAC performed better in a fire than others, enhancing their fire-resistant properties. In summary, this research introduces a hopeful approach to improve the sustainability of concrete and mitigate the environmental repercussions of industrial waste.

Waste-to-chemicals: Green solutions for bioeconomy markets

In the fast-developing time, the accumulation of waste materials is always in an uptrend due to population increases and industrialization. This excessive accumulation in waste materials harms the ecosystem and human beings by depleting water quality, air quality, and biodiversity. Further, by use of fossil fuel problem-related global warming, greenhouse gases are the major challenge in front of the world. Nowadays, scientists and researchers are more focused on recycling and utilizing different waste materials like a municipal solid waste (MSW), agro-industrial waste etc. The waste materials added to the environment are converted into valuable products or green chemicals using green chemistry principles. These fields are the production of energy, synthesis of biofertilizers and use in the textile industry to fulfil the need of the present world. Here we need more focus on the circular economy considering the value of products in the bioeconomic market. For this purpose, sustainable development of the circular bio-economy is the most promising alternative, which is possible by incorporating the latest techniques like microwave-based extraction, enzyme immobilization-based removal, bioreactor-based removal etc., for the valorization of food waste materials. Further, the conversion of organic waste into valuable products like biofertilizers and vermicomposting is also realised by using earthworms. The present review article focuses on the various types of waste materials (such as MSW, agricultural, industrial, household waste, etc.), waste management with current glitches and the expected solutions that have been discussed. Furthermore, we have highlighted their safe conversion into green chemicals and contribution to the bioeconomic market. The role of the circular economy is also discussed.

A Study to Explore the Concepts of Insomnia and its Treatment in Unani System of Medicine

Insomnia is a common problem across the world due to various reasons as increasing mental work and stress, less physical activities, social and personal life problems, lifestyle diseases and medication. Consensus proved its 30% incidence overall in the population but sleep-maintenance insomnia is considered up to 66.5%. The study aims to enlighten the Insomnia in Unani classical books in the mean of weighted causes, pathological condition and best treatment. Gathering tribute knowledge of insomnia from Unani books and framing up it on newly researched neurotransmitter consideration in the same meaning, as Unani System of medicine describes Su-i-mizaj Har yabis (hot and dry temperament) is a pivotal cause that is a pathological condition develops after hitting several causes as a collection of briny liquid, accumulation of waste material in the passages of the brain and meninges and Gastro-intestinal insufficiency, excessive flatus, headaches and cancer etc. these condition directly or by signalling motivates the nerves and brain cells and sometimes obstacle in the passage of psychic powering pathway causes more psychological disorders. In the right direction of reason, Unani physicians have presented lucid and articulated treatment to restore the brain’s temperament by administration of soothing and tranquil medicines, evacuate waste from brain channels and regularize the CSF flow and ion exchange. The study is concluded the result with hypothesis to set some clinical trials of mentioned drugs schedule and recommended modulation in a new scale to make practical generalize its result for future studies.

Waste as A Medium for Agriculture- An Example of Sustainable Waste Management: A Case Study of Titagarh Municipal Dump Site, West Bengal

Urbanization is considered as a core event which accelerate the generation and accumulation of waste materials in a large scale. This waste can be managed by different ways, garbage farming is most environment friendly among them. The aim of the current work is to uncover the present waste management system of Titagarh municipality, waste characterization and valuate this waste management system. Approximately 60–65-ton waste is being deposited in this dumping ground every day, which are the main source of bio-fertilizer of 70.08 acre of land. By using this organic manure, the chemical properties of the agricultural field are so good that three crops can be cultivated in a year. Therefore, the gross economic value of this landfill site, taking into account the financial value of garbage farming and other sources, is approximately 1600000 Indian rupees.

Adjustable children’s clothing: preferences of children and their parents in Sri Lanka

PurposeAdjustable children’s clothing is being acknowledged as the best solution worldwide to reduce the unnecessary squandering of money and accumulation of waste materials in landfills because provision for size adjustment helps to increase the lifespan of a garment. There are no studies on the preferences of both children and their parents for adjustable children's clothing, although they are equally involved as consumers in the children’ clothing market. Thus, this paper aims to explore the preferences of children and their parents about adjustable children’s clothing.Design/methodology/approachFive children’s wear fashion outlets in the Colombo District were studied to explore the types of children’s clothing that are available in the Sri Lankan market. A questionnaire survey was conducted with parents who have children between the ages of 8 and 12 years to determine their perceptions on the use of adjustable children’s clothing. Five children living in the Colombo District were also interviewed.FindingsAccording to the questionnaire survey results, 53% of the respondents who have children in the age group 8–12 years were unaware of the existence of adjustable children's clothing, whereas 47% had at least some knowledge of them. Interviews with the five children showed that only two children were aware of garments with adjustment features. As it turned out though, four children were indeed wearing them but did not realize those were adjustable garments. It was found that if adjustable children's clothing were freely available in the Sri Lankan market, 79.5% of the respondents would prefer to buy them because they could appreciate the financial and environmental benefits that would result. Clothing made of standard, high quality, durable and comfortable materials were all in demand. In addition, parents expected adjustable children's clothing products to be available at affordable prices.Originality/valueThis study provides important knowledge that can fill the gap in the existing literature on adjustable children’s clothing. The findings will be beneficial for the children’s clothing product designers and developers, as well as academia.

Effect of Recycled Aggregate Concrete and Steel Fibers on the Strength of Self-Compacting Concrete

The accumulation of waste materials in landfills without treatment threatens public health and the environment. The quantity of solid waste continually increases, causing environmental pollution. One of these wastes that should receive scientific treatment is concrete waste. The use of concrete waste as fine or coarse aggregate in self-compacting concrete (SCC) is one of the useful solutions to this problem. This study aims to reuse concrete waste as coarse aggregate in the production of SCC and find out the influence of different steel fiber contents on the strength of SCC. The steel fibers (SF) were used to reinforce SCC in three different volumes (0, 0.5, and 1 % of concrete volume), and the recycled coarse aggregate (RCA) was used to replace natural coarse aggregate (NCA) in five replacement levels of 0, 25, 50, 75, and 100%. The compressive and tensile strengths of the SCC specimens in the hardened state were determined. The results of the experimental study refer to the steel fiber having a positive effect on the enhancement of mechanical properties, particularly the tensile strength of SCC. The addition of 50% recycled aggregates in the concrete mix contributed to increasing the compressive strength by about 20%. Therefore, it can be said that the dual use of recycled aggregates with steel fibers produced concrete with high specifications compared to ordinary concrete. Another positive effect lies in the disposal of concrete waste, which contributes to an economic return in addition to reducing the effect on the environment.

Combining geophysical methods (DC, IP, TDEM and GPR) to characterise mining waste in the Linares-La Carolina district (southern Spain)

The accumulation of waste materials in old, abandoned mining districts without prior sealing of the substrate currently poses a significant risk of contamination to soils and surrounding waters. Some of these mining dams have undergone a reclamation and sealing process in recent years to alleviate this problem. The current study is an analysis of the effectiveness of using different geophysical techniques for characterising these structures and monitoring the isolation performed. This study was carried out in the old mining district of Linares-La Carolina (southern Spain). The following techniques were investigated in this study: direct current (DC) resistivity, induced polarization (IP), ground-penetrating radar (GPR) and the time domain electromagnetic method (TDEM).Combining DC and IP made it possible to characterise the internal structure of the abandoned mining dams, whereby the geometry of these deposits was determined and the corresponding potential risks were assessed. In addition, percolation zones of mining leachates were detected that indicate defects in the sealing stage.TDEM was a good complementary technique for calculating the depth of the bedrock on which the mining dam is located. GPR could only be used to investigate shallow depths at all of the antenna frequencies used (100, 250 and 500 MHz) but was useful for obtained detailed information about the last stages of filling and characterising the encapsulation performed during sealing.

Study on macro-meso mechanical properties of cemented tailings backfill with high fly ash content.

The use of cement and fly ash (FA) to prepare cemented tailings backfill (CTB) lowers backfill mining costs while also reducing pollution caused by the accumulation of waste materials like tailings and FA, making it a green backfill mining process. While adding FA to CTB may reduce costs, too much FA might weaken CTB's strength property. Mechanical tests were used to explore the effects of FA content and curing time on the uniaxial compressive strength (UCS) and deformation modulus of CTB in this research. The effects of FA content on failure modes, strain energy, and crack evolution of CTB were studied using a numerical model that considered FA content and particle contact mode. The influence mechanism of different FA contents on CTB was also revealed at the microscopic level. The results demonstrate that the UCS of CTB has a quadratic polynomial and a linear relationship with FA content and curing time respectively, and that the elasticity modulus and secant modulus of CTB increase and then decrease with FA content under different curing times. The peak strain energy of CTB increases and subsequently declines with the FA content, and crack propagation inside CTB may be limited by regulating the FA content. A reasonable content of FA can optimize the size and distribution of CTB microscopic defects, enabling them to exhibit superior strength property. This study systematically explores the mechanism of different FA contents on the strength property of CTB from a macro-micro perspective, providing an essential reference value for improving the recycling of FA and waste residues such as tailings.

Durability and Sustainability of Cement-Stabilized Materials Based on Utilization of Waste Materials: A Literature Review

The utilization of waste materials in cement-stabilized materials (CSMs) is an important way to promote the sustainable development of road engineering construction and solve the environmental problems caused by the accumulation of waste materials. With the increasingly prominent global environmental problems, the exploitation of natural aggravate and the production of cement are subject to strict management and restrictions. Different waste materials, such as industrial and mining wastes, construction and demolition wastes, municipal wastes, waste rubber and waste fiber, are utilized in CSMs, and this is beneficial to promote the sustainable development of CSMs. In order to promote the rational application of waste materials in CSMs, this paper systematically reviews the research on the durability and sustainable development of CSMs. The types and mixing forms of waste materials reutilized in CSMs are discussed. The effect of different waste materials on the durability of CSMs is objectively evaluated. The potential challenges of sustainable development of CSMs are proposed. This review may help to alleviate the apprehension of road workers about the utilization of waste materials in CSMs and provide useful suggestions for the large-scale application of different waste materials.

Evaluation of the State of Ecological Sphere Vital Activity in the Medium-Size Cities

The analysis of the state of ecological sphere development in the medium-size cities of Ukraine certifies the presence of negative tendencies there, exactly, the decrease of population quantity, the growth of numbers of movable sources and the level of population morbidity. There has been suggested a scale to make qualitative and quantitative evaluation of the changes of ecological sphere state according to which indices ascertain the correspondence with their states: 1,0 – 0,75 as high, 0,749 – 0,50 as medium, 0,499 – 0,25 as less than medium, 0,249 –0, as low. It is revealed that high level of ecological development refers to Ivano-Frankivsk (0,777), which is the leader according to the level of planting greenery, the lowest accumulation of waste materials of the 1st – 3d level of danger, the lowest emission of pollutants into atmosphere from stationary and movable sources. Melitopol has medium level (0,57) and is the leader as to the indices of drinking water consumption and is characterized by good indices concerning the waste treatment, considerable expenses spent on nature-protecting activity and low amount of pollutant emission into atmosphere. The cities of Lutsk and Rivne are characterized by lower than medium level of the development of ecological sphere vital activity (0,482; 0,384 in the year 2017 correspondingly), because of a great amount of pollutants emission into atmosphere, low level of planting greenery. The city of Rivne, besides, has the highest indices as to the assumption of waste materials and the least expenses on nature-protecting measures. It is ascertained that the influence of destimulators and stimulators on the level of development of medium-size cities ecological sphere is described by dependencies which look like straight lines at the coefficients of determination R2 from 0,381 to 0,721.

Evaluation of Growth Media Incorporating Cotton Ginning By-products for Vegetable Production

The suitability of by-products from the cotton ginning industry for incorporation into growth media for three vegetable crops was examined. Composts were prepared by mixing the by-product with soil in 5 ratios (20:80, 40:60, 60:40, 80:20, 100:0, v/v compost and soil). Seeds of lettuce (Lactuca sativa L.), radish (Raphanus sativus L.) and spinach (Spinacia oleraceae L.) were sown directly within the composts and in 100% peat (control) in October (autumn crop) and December (winter crop). Plant growth (height, leaf number, dry and fresh weight, chlorophyll content) was recorded 19 and 17 days after transplantation (first and second sowing respectively) and at harvest. Fresh and dry weight was recorded at harvest. Overall, plant height and leaf number were higher when the growth media consisted principally of compost (higher ratios of cotton by-product: soil) than in the control (peat), whereas among the various ratios of compost: soil significant differences were recorded, media with a high compost content showing better growth in most cases. Similar results were reported for fresh and dry weight and chlorophyll content, except for dry weight in the second sowing, where growth media with a lower compost content had a higher dry weight. In conclusion, the incorporation of the cotton ginning by-product into compost resulted in better growth of lettuce, spinach and radish, suggesting that the use of this material may be of economical value as a spin-off product for the cotton ginning plant and also as a means of reducing present pollution of the environment due to the accumulation of waste material.

New Regulations and Sustainable Solutions Removal of by-Products of Slaughtered Livestock

The environment is now threatened by the creation and accumulation of waste materials in all branches of industrial production and in the meat industry. The importance of harmless removal of animal waste increases with the intensification of animal breeding and with the development of meat processing plants.. Problem solution of harmless removal of animal origin waste products has the big importance. It is irreplaceable, namely preventive veterinary and sanitary measure used in control of livestock diseases and zoonosis. Nowadays, it has a big role in environment protection. In the world, the best way of harmless removal of animal waste from meat industry as well as died animals is exactly their collecting and utilization (for feed production, chemical industry and fuel), depending on raw material structure and its characterization, their processing in special plants with modern equipment and technology.It was emphasized that objects for animal waste processing should be treated from the two aspects: as processing plants serving for the environment protection and as possible environment polluters.

Construcción, paisaje y arte: los cubos de la memoria

La villa de Llanes (Asturias) tiene un puerto pesquero cuyaampliacion se inauguro en 1994. Las obras consistieron en laconstruccion de una nueva darsena, un dique continuacion delexistente, y la colocacion de grandes bloques de hormigon amodo de escollera.Para aminorar el efecto estetico no deseable del acabado dela misma, se propuso la recuperacion de ese espacio mediantela creacion de un gran mural que evitase, por una parte, elefecto estetico del hormigon, y, por otra, la acumulacion demateriales de desecho que la mar acumulaba en dichaescollera, asumiendo una obligacion de mantenimiento ylimpieza.Esta intervencion ha sido llevada a cabo por el pintor yescultor vasco Agustin Ibarrola.