What is the application of waste coffee ground in cement?
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Waste coffee grounds can be used in cement for various applications. One application is in the production of mortars for coating and laying blocks. Chemical treatments with sodium and potassium hydroxide can be used to incorporate coffee husks into the mortar mixture, resulting in compatible parameters for this type of application . Another application is the use of spent coffee grounds as a partial replacement of aggregates in concrete materials. This can improve the compressive strength of the concrete, as well as decrease its thermal conductivity, making it more insulating . Additionally, spent coffee grounds can be added to cement as a supplementary cementitious material, along with fly ash and volcanic ash. This can reduce CO2 emissions and result in the formation of cementitious gels, such as calcium silicate hydrate and ettringite, which contribute to the strength of the cement . Waste coffee grounds can also be utilized as a cement replacement in concrete, resulting in improved compressive strength when processed at high temperatures . Finally, spent coffee grounds can be incorporated into asphalt binders to enhance their performance, particularly in terms of low-temperature stability .
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01 Mar 2021 4 Citations | The application of waste coffee grounds in cement is as a replacement for 5% of the cement in concrete. |
| The application of waste coffee grounds in cement is to partially replace ordinary Portland cement (OPC) and calcium sulfoaluminate cement (CSA) in order to reduce CO2 emissions from the cement industry. | |
| The application of waste coffee husks in cement is to use them in mortars for coating and laying blocks, after chemical treatments with sodium and potassium hydroxide. | |
| The application of waste coffee grounds in cement is as a partial replacement of aggregates in concrete materials, which can improve compressive strength and decrease thermal conductivity. |
Related Questions
Coffee ground but not ash and tea waste improve clay soil strength and cohesion?5 answersCoffee husk ash (CHA) has been found to improve the strength and cohesion of clay soil. Studies have shown that the addition of CHA to clay soil increases the unconfined compressive strength (UCS) and cohesion values, while also increasing the internal friction angle. The pozzolanic and hydration reactions between CHA and the soil contribute to the improvement in soil properties, filling soil voids and binding particles together. On the other hand, spent coffee grounds (SCG) have been studied as a soil organic amendment and have been found to have short-term effects on soil physical properties, including increasing water retention and reducing soil bulk density. However, there is no mention of tea waste in the abstracts provided, so its effect on clay soil strength and cohesion is not addressed.
What are the potential environmental impacts of coffee grounds waste?4 answersCoffee grounds waste, specifically spent coffee grounds (SCGs), can have potential environmental impacts. Currently, a significant amount of SCGs is inappropriately disposed of in landfills, leading to the generation and emission of greenhouse gases such as methane and CO2. This improper disposal contributes to environmental contamination and poses health risks. Additionally, the production of coffee grounds waste contributes to the overall waste generated from coffee production, which is estimated to be around 6-8 million tonnes annually worldwide. However, there is potential to mitigate these environmental impacts by finding alternative uses for SCGs. Research has explored various applications for SCGs, including biofuels, catalysts, cosmetics, composite materials, and food ingredients. By repurposing SCGs and utilizing their unique properties and compounds, it is possible to reduce waste, delay CO2 emissions, and avoid the emission of toxic organic volatile compounds associated with their combustion.
What can using agricultural waste as alternatives in cement do>?5 answersUsing agricultural waste as alternatives in cement can have several benefits. Firstly, it can promote sustainable construction practices by reducing the environmental impact of concrete structures and decreasing carbon dioxide emissions. Secondly, it can help in the efficient utilization of agricultural waste materials, such as rice husk ash, sugarcane bagasse, and palm oil ash, which would otherwise be dumped in landfills. Additionally, the use of agricultural waste as substitutes in cement can contribute to the conservation of natural resources and provide alternative techniques for waste disposal. Moreover, incorporating agricultural ashes in concrete mixtures, such as geopolymer concrete, can enhance the strength and microstructural performance of the material, leading to sustainable construction practices. Overall, using agricultural waste as alternatives in cement can have environmental, economic, and labor benefits, making it a viable option for the construction industry.
What are the effects of using waste foundry sand as partial replacement in concrete?5 answersThe effects of using waste foundry sand as a partial replacement in concrete are varied. According to Sharma, the mechanical properties of concrete, including compressive strength, can increase by 15% when waste foundry sand is included in the mixture. However, Gaikwad et al. found that the workability and compressive strength of concrete can be negatively affected when waste foundry sand is fully replaced with natural sand. Kumar and Silori's review suggests that the optimum replacement level for waste foundry sand in concrete is in the range of 20-30% by weight, as higher replacement levels tend to degrade the major mechanical properties of the concrete. Additionally, the review recommends exploring the use of strength-enhancing waste products or low-cost additives at full replacement to improve the performance of concrete. Overall, the use of waste foundry sand as a partial replacement in concrete can have both positive and negative effects on its mechanical properties, depending on the replacement level and other factors.
Why does coffee waste needs to be dried before incorporating in the concrete?3 answersCoffee waste needs to be dried before incorporating it into concrete because drying helps to improve the properties of the coffee waste and ensures its compatibility with the concrete mixture. Drying coffee beans with dehumidified air results in fewer broken and defective beans, higher retention in a sieve, and higher beverage quality. Similarly, treating coffee husks with sodium and potassium hydroxide allows for their use in mortars for coating and laying blocks, as it improves their compressive strength and water absorption properties. Mixing coffee grounds with raw clay and firing them at high temperatures also enhances the insulating properties of the clay bricks. Additionally, drying coffee husks before using them as a partial substitute for sand in concrete production helps to maintain the material's compressive strength and reduces the amount of sand required. Finally, drying spent coffee grounds before incorporating them into dune sand concrete improves the thermal characteristics of the material, making it suitable for use in structural components.
Where to get coffee husk waste?4 answersCoffee husk waste can be obtained from various sources. One source is the coffee processing industry, where coffee husk ashes are produced as a solid waste material. Another source is the coffee industry itself, where coffee waste and cow dung are used as plant fertilizer. Additionally, coffee husk can be collected from coffee farms or factories during the processing of coffee beans. The husk can be separated into different groups, such as outer husk, inner husk, and husk from the milling process. The use of coffee husks from agro-industries is highly economical for various purposes, including the production of mosquito pathogenic bacilli and mosquitocidal biopesticides. Overall, coffee husk waste can be obtained from the coffee processing industry, coffee farms or factories, and agro-industries involved in coffee production.