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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 35 for “"cement replacement"”.
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The potentials of pennisetum purpureum ash as cement replacement material
Cement production requires non-renewable natural resources that will be depleted in coming years. An alternative needs to be found to promote sustainable development for the construction industry. Therefore, this study introduced Pennisetum Purpureum ash (PPA) as a natural pozzolan. Limited …
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The Durability of Mortar with Ground Clay Brick as Partial Cement Replacement
… suitability of utilising ground waste brick as a cement replacement material. The brick types investigated were obtained from the UK,Denmark, Lithuania and Poland. Cement was partially replaced by various quantities and types of ground brick in mortar and concrete. Compressive strength, pore size …
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Drinking Water Treatment Waste as an Alternative for Internal Curing and Cement Replacement in Concrete
… material when permeability is low. Hydrating cement paste shrinks through several mechanisms broadly grouped into autogenous and drying shrinkage. These mechanisms cause cracks which become high permeability routes for water and aggressive ion movement, such as chlorides to reinforcing steel. …
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Effect of blast-furnace slag as cement replacement on hydration, microstructure, strength and durability of concrete
… during the last years. Also in the concrete and cement industry, attempts are made to minimize the environmental impact. One way to implement this thought, is the use of industrial by-products as cement replacing material. The 'waste' products are upgraded in high-value applications and the need …
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Investigation of green foamed concrete incorporating palm oil fuel ash and eggshell ash as partial cement replacement
… and Eggshell Ash (ESA) from 5% to 15% as partial cement replacement. The effect of partial replacement on the workability was determined by J-ring test, mechanical properties such as, compressive and tensile strengths as well as modulus of elasticity and thermal performance of GFC was determined …
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Performance of self-compacting concrete incorporating palm oil fuel ash and egg shell powder as partial cement replacement
… that uses less aggregates, but high content of cement compared to normal concrete. It is able to flow by itself and does not require compaction. Therefore, raw materials and natural resources are required in large quantities for SCC production. In order, to minimize the usage of the cement in …
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Flexural performance of textile fine grained mortar containing risk husk ash as a partial cement replacement in reinforced concrete beams
… that utilized rice husk ash (RHA) as a partial cement replacement material of FGM and textile reinforcement made from glass fibre reinforcement called as alkali resistant (AR) glass. Characteristic of the binder were firstly performed by conducting X Ray Fluorescence, X Ray Diffraction, particle …
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Textile fine grined mortar containing palm oil fuel ash as a partial cement replacement for flexural strengthening on reinforced concrete beams
… of fine sand less than 1 mm, ordinary Portland cement (OPC) and POFA as a partial OPC replacement. Flexural and compressive test was conducted to identify the optimum FGM-POFA. After that, the strengthening on concrete prisms derived from combination of optimum FGM-POFA and alkali resistant …
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Leaching behaviors of heavy metals on petroleum sludge waste treatment by using solidification/stabilization (s/s) method with palm oil fuel ash as partial cement replacement
… of the pollutants within matrices using the cement. Tremendous research has been carried out using the ash from different sources in the S/S method as environmentally-friendly solutions. It replaces cement with a high pozzolonic characteristics binder that could encapsulate the pollutants …
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Behavior and temporal-based effects of sustainable self-consolidating concrete in bridge structures
… a new class of SCC incorporating up to 70% cement replacement with fly ash. Three replacement levels (50%, 60%, and 70%) by weight were selected to quantify the effect of cement replacement on the structural performance of HVFA-SCC. Shear behavior and bond performance of HVFA-SCC were …
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Performance of No Vibration/No Admixture Masonry Grout Containing High Replacement of Portland Cement with Fly Ash and Ground Granulated Blast Furnace Slag
… by substituting various proportions of Portland cement with Type F fly ash and/or ground granulated blast furnace slag (GGBFS). The percentages of Portland cement replacement evaluated were 0%, 50%, 60%, and 70% for Type F fly ash. The percentages of Portland cement replacement evaluated were 0%, …
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The performance of lightweight concrete brick containing expanded polystyrene and palm oil fuel ash
… the pozzolanic materials that could be used as a cement replacement. Additionally, it is found that the optimum amount of POFA replacement could enhance the strength and also fire resistance performance of a concrete materials. Therefore, in the present study a new combination of replacement …
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Determination of chloride diffusion constants for concretes of differing water to cement ratios and admixtures
… conditions. The mixes included water to cement ratios of 0.35, 0.40, 0.45, and 0.50, and two water to cement ratios of 0.45 with 15% cement replacement with pozblan admixtures (silica fume and type'F flY ash). Thus, the effects of temperature, water to cement ratio, and pozzolanic …
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Fatigue and fracture of cement mortars containing fly ash
… effects of fly ash on the fatigue resistance of cement mortars when included as a partial cement replacement, and to seek to improve the understanding of cyclic fatigue crack growth mechanisms in cementitious materials. Mortar mixes were prepared with similar compressive cube strengths using a …
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Valorisation of wind turbine blades into concrete : a contribution towards a more sustainable approach
… impact of concrete production by partial replacement of virgin raw materials. Therefore, this thesis is aimed at investigating possible avenues for valorisation of decommissioned wind-turbine blades (DWTB) glass fiber-reinforced polymer (GFRP) materials - termed throughout this thesis as …
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Steam Cured Self-Consolidating Concrete and the Effects of Limestone Filler
… mechanisms associated with replacing 15% of the cement by limestone filler on the mechanical properties and durability performance of self-consolidating concrete designed and cured for precast/prestressed applications. This study investigates the role of limestone filler on the hydration …
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Development of Optimization Models for the Set Behavior and Compressive Strength of Sodium Activated Geopolymer Pastes
… known as a geopolymer can be used as a portland cement replacement and in this capacity emits around 67% less carbon dioxide. In addition to potentially reducing carbon emissions, geopolymers can be synthesized with many industrial waste products such as fly ash.</p><p>Although the benefits of …
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Sound absorption characteristic of lightweight brick containing Expanded Polystyrene Beads (EPS) and Palm Oil Fuel Ash (POFA)
… were test first. EPS was used as a sand replacement whereas POFA was used as a cement replacement. The bricks were casted with 0% to 50% of EPS and 0% to 25% of POFA and air cured for 7, 28 and 56 days. The bricks incorporated with 30%, 40% and 50% of EPS were considered lightweight …
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Strength and water permeability of concrete containing coal bottom ash as cement and fine aggregate replacement material
… and ungrinded coal bottom ash (UGCBA) as a cement and fine aggregate replacement material in concrete and evaluate its strength and durability performance. In this study, GCBA was grinded for 20, 30 and 40 hours to produce fine particles as comparable to cement. Initially, particle size …
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Incorporation Of High-Volume Fly Ash To Produce Structural Lightweight Concrete
… 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 …
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