Incorporation of High-volume Fly Ash to Produce Structural Lightweight Concrete PDF Download
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Author: Tijani Mohammed
Publisher:
ISBN:
Category : Aggregates (Building materials)
Languages : en
Pages : 68
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Book Description
Concrete industry is one of the main industries using large proportion and volume of our natural resources. Ordinary Portland Cement is an important source for the emission of carbon dioxide into the atmosphere because of burning fuel and raw materials' decomposition during the production process of cement. Due to the increasing demand in concrete, one of the most effective and reliable ways to reduce the negative impact on the environment in the concrete industry is through the use of waste and by-product materials such as aggregates and ordinary portland cement replacement in concrete. The prospect of producing structural lightweight concrete using large volume of waste materials and by-products is investigated in this current study. The lightweight material used as coarse aggregate comprised of expanded shale and expanded clay. While the waste and by-product material comprised of a high volume (50% and 70%) of type C and type F fly ash, as replacement for cement by volume. The mechanical properties such as compressive strength, split-tensile strength, flexural strength, modulus of elasticity and drying shrinkage for up to 28 and 56 days are investigated as well as slump and unit weight for fresh density. The durability properties such as abrasion resistance, water absorption, resistance to chloride ion penetration and freeze and thaw resistance are also investigated. All lightweight concrete containing 50% fly ash class C and F replacement showed adequate strength in the mechanical properties. While lightweight concrete with 70% fly ash both class C and F exhibited strength lost compared to other concrete samples. Test results showed that the early ages of drying shrinkage of ordinary Portland cement and fly ash are similar but with the growth rate of drying shrinkage in OPC, it is expected for concrete incorporated with fly ash to exhibit good resistance to drying shrinkage. Test results also indicated that, concrete incorporated with fly ash showed good resistance to chloride ion penetration and there was no significant difference in abrasion for either OPC or fly ash incorporated concretes. There was significant difference in water absorption of the concrete containing fly ash. However, concretes with fly ash performed poorly and could not resist exposure to freeze and thaw mechanism especially concretes incorporated with 70% fly ash F.
Author: Tijani Mohammed
Publisher:
ISBN:
Category : Aggregates (Building materials)
Languages : en
Pages : 68
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Book Description
Concrete industry is one of the main industries using large proportion and volume of our natural resources. Ordinary Portland Cement is an important source for the emission of carbon dioxide into the atmosphere because of burning fuel and raw materials' decomposition during the production process of cement. Due to the increasing demand in concrete, one of the most effective and reliable ways to reduce the negative impact on the environment in the concrete industry is through the use of waste and by-product materials such as aggregates and ordinary portland cement replacement in concrete. The prospect of producing structural lightweight concrete using large volume of waste materials and by-products is investigated in this current study. The lightweight material used as coarse aggregate comprised of expanded shale and expanded clay. While the waste and by-product material comprised of a high volume (50% and 70%) of type C and type F fly ash, as replacement for cement by volume. The mechanical properties such as compressive strength, split-tensile strength, flexural strength, modulus of elasticity and drying shrinkage for up to 28 and 56 days are investigated as well as slump and unit weight for fresh density. The durability properties such as abrasion resistance, water absorption, resistance to chloride ion penetration and freeze and thaw resistance are also investigated. All lightweight concrete containing 50% fly ash class C and F replacement showed adequate strength in the mechanical properties. While lightweight concrete with 70% fly ash both class C and F exhibited strength lost compared to other concrete samples. Test results showed that the early ages of drying shrinkage of ordinary Portland cement and fly ash are similar but with the growth rate of drying shrinkage in OPC, it is expected for concrete incorporated with fly ash to exhibit good resistance to drying shrinkage. Test results also indicated that, concrete incorporated with fly ash showed good resistance to chloride ion penetration and there was no significant difference in abrasion for either OPC or fly ash incorporated concretes. There was significant difference in water absorption of the concrete containing fly ash. However, concretes with fly ash performed poorly and could not resist exposure to freeze and thaw mechanism especially concretes incorporated with 70% fly ash F.
Author: Mohammad Abdul Mannan
Publisher: Nova Science Publishers
ISBN: 9781536109009
Category : Gardening
Languages : en
Pages : 332
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Book Description
Author Biography: Dr. Mohammad Abdul Mannan was born at a simple family of a small village, Aktarpur, Rangiarpota, Jibonnagar, Chuadanga, Bangladesh. He has obtained B.Sc. (Civil Engineering) degree with first class, MSc in Civil Engineering and PhD in Concrete technology. He has started carrier as lecturer at BIT Rajshahi (now RUET), Bangladesh followed by AJP consulting firm, then Universiti Malaysia Sabah (UMS) and is now a Professor of Department of Civil Engineering, Universiti Malaysia Sarawak, Malaysia. He is the inventor of few construction products. Based on 30 years of experience in teaching, professional practice and research, his vision is to be excellence in research on Innovative Construction Material and Structure. Book Description: Due to a high demand in construction and furniture industries worldwide, natural resources such as stones and wood as non-renewable resources are being depleted. Thus, researchers are focusing on renewable resources as alternative materials. As such, the utilisation of abundant solid wastes and byproducts, which are discharged from agriculture, industry and municipalities present an alternative to the conventional materials for the construction and furniture industries. These solid wastes and byproducts, when properly processed have shown to be effective and can readily meet design specifications. Agricultural solid wastes from oil palm distributors such as Oil Palm Shell (OPS) and Empty Fruit Bunch (EFB), which are abundant in agro-based countries, present an interesting alternative to the conventional aggregate in lightweight concrete and artificial plank production, respectively. At present, palm oil producing countries are Barkina Faso, Benin, Burundi, Cameroon, Central African Republic, Colombia, Costa Rica, C�te d'Ivoire, Democratic Republic of Congo, Ecuador, Equatorial Guinea, Gabon, Gambia, Ghana, Guinea Bissau, Guinea, Honduras, India, Indonesia, Liberia, Malaysia, Mexico, Nigeria, Papua New Guinea, Peru, Republic of Congo, Senegal, Sierra Leone, Tanzania, Thailand, Togo, Uganda, Venezuela and others. In Malaysia, oil palm plantations cover over 5 million hectares, and annual production of OPS as solid waste from 450 oil palm mills is more than 6 million tons. This large amount of OPS as a renewable green aggregate can contribute to overcoming the over dependence on depletable resources for concrete production. The civil engineering projects are of a larger scale; they need sustainable materials in order to gain a greater momentum of growth. The major technical characteristics of OPS solid waste must be primarily understood before each particular use. Therefore, there is a need to highlight the importance of OPS to be used in the construction industry.
Author: Ahmad Fuzail Hashmi
Publisher:
ISBN: 9785032986553
Category : Architecture
Languages : en
Pages : 0
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Book Description
High Volume Fly Ash Concrete (HVFA) is a type of concrete that incorporates a large volume of fly ash as a partial replacement for Portland cement. Fly ash is a by-product of coal combustion that is collected from power plants, and it has pozzolanic properties that can enhance the durability, workability, and strength of concrete. In HVFA, the replacement of Portland cement with fly ash typically ranges from 50% to 70% by mass, resulting in a reduction in the amount of cement required and a decrease in the carbon footprint of the concrete. However, this high volume of fly ash can also affect the behavior of the concrete in structural design. One of the main challenges in designing with HVFA concrete is the potential for delayed strength development. Fly ash reacts slowly with water, and this can result in a longer period for the concrete to reach its desired strength. This delayed strength development must be taken into account in the design process to ensure that the concrete can support the intended loads. Additionally, the use of HVFA can also affect the workability and setting time of the concrete. The high amount of fly ash can make the mixtures more viscous and harder to place, and it can also result in longer setting times. This can impact the construction schedule and require adjustments to be made in the mix design and placement procedures. On the other hand, HVFA can also provide benefits in structural design. The lower heat of hydration and reduced shrinkage characteristics of HVFA can minimize the potential for cracking and improve the long-term durability of the concrete. Furthermore, the use of fly ash can contribute to the overall sustainability of the project by reducing the carbon footprint and diverting waste from landfills. Overall, the behavior of HVFA concrete in structural design requires careful consideration of its unique properties and potential challenges. With proper mix design and construction practices, HVFA can provide a durable and sustainable option for concrete structures.
Author: V. Mohan Malhotra
Publisher:
ISBN: 9780973150728
Category : Fly ash
Languages : en
Pages : 120
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Book Description
Author: Dr. SS. Asadi & Dr. Vennam Swathi
Publisher: Laxmi Book Publication
ISBN: 1304796221
Category : Art
Languages : en
Pages : 107
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Book Description
When infrastructure is built quickly, development occurs. Concrete is the go-to material for construction projects. Manufacturing cement is a significant contributor to atmospheric carbon dioxide. Using carbon-neutral materials like crimson mud or powdered snail shells can reduce cement's carbon dioxide emissions by half. As an adaptable alternative to traditional concrete, HVFA concrete has many uses. Long-lasting and useful in Plain Cement Concrete (PCC) projects, fly ash also enhances concrete's workability. The positive effects of fly ash on the environment, such as lower carbon dioxide emissions, are not new. Adding fly ash to concrete increases its strength and segregation, which reduces its price and makes it simpler to pump.
Author: Dietmar Lutze
Publisher: Verlag Bau+Technik
ISBN: 3764005378
Category : Technology & Engineering
Languages : en
Pages : 176
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Book Description
When used as an addition and binder component, fly ash has become an indispensable construction material for many concrete applications. The conditions produced in power stations when firing fine pulverized coal result in the formation of a reactive, flour-fine, pozzolanic mineral material from the accompanying rock in the coal. Owing to its specific characteristics it has a positive impact on the properties of fresh and hardened concrete and facilitates cost-effective production of high-grade, durable concretes. The authors of this handbook have combined the latest discoveries from the field of research with practical experience of the use and effects of fly ash in concrete. This handbook provides the necessary information and makes interesting suggestions for selective use of fly ash in concrete.
Author: Anthony Lloyd Theodorou
Publisher:
ISBN:
Category : Aggregates (Building materials)
Languages : en
Pages : 188
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Book Description
Author: ACI Committee 213
Publisher:
ISBN: 9780870314308
Category : Concrete construction
Languages : en
Pages : 27
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Book Description
Author: K. Wesche
Publisher: CRC Press
ISBN: 0203626419
Category : Architecture
Languages : en
Pages : 298
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Book Description
This book is a state-of-the-art report which documents current knowledge on the properties of fly ash in concrete and the use of fly ash in construction. It includes RILEM Recommendations on fly ash in concrete and a comprehensive bibliography including over 800 references.
Author:
Publisher:
ISBN:
Category : Coal-fired power plants
Languages : en
Pages : 162
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Book Description
