Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 17 of 17 for “"pozzolan"”.
-
Analysis of Contaminants on Ground Glass Pozzolan and the Effects on Pozzolan Performance in Mortar
Using ground glass pozzolan as a replacement for portland cement can reduce the CO2 emissions associated with concrete production and utilize waste glass that would otherwise end up in landfills. In the United States, municipal solid waste (MSW) stream recycling operations collect plastic, glass, …
-
Macro - and Microstructure Evaluation and Field Applications of Concrete with Recycled Glass Pozzolan
… been focused on the evaluation of a new glass pozzolan (GP) from recycled post-consumer glass.</p> <p>The GP branded as Pozzotive® has been developed by Urban Mining Northeast as a proven product used in concrete-block, cast-in-place and pre-stressed concretes. Pozzotive® conforms to ASTM C-618 …
-
Characterization of pozzolanic cement for radioactive waste disposal
… analyze the chemical and physical properties of pozzolanic cement. The principle objective of this research was to determine whether pozzolanic cement is a suitable material for permanently encasing high-level radioactive waste (HLW) and spent-nuclear fuel (SNF) in disposal canisters. This …
-
Service Life Modeling of Virginia Bridge Decks
… decks â 0.45 w/c, and 10 ECR decks â 0.45 w/(c+pozzolan). Using chloride titration data and cover depth measurements from the sampled bridge decks and chloride corrosion initiation values determined from the literature for bare steel, service life estimates were made for the three sets of bridge …
-
Hydration, Pore Development and Chemical Resistance of Metakaolin - Fly Ash - Portland Cement (MK-PFA-PC) Blends
… MK is calcinated clay and is a relatively new pozzolanic material. Although it is a very effective pozzolan it is also very expensive. Using FA, which is a much less expensive material, as a PC replacement material, is problematic, as there is slow and low early strength development whereas MK …
-
Sulfate attack on cement paste with volcanic ash : durability analysis
… specifically to sodium and magnesium sulfates. Pozzolanic volcanic ash can be a viable partial substitute for Portland Cements to develop cement paste compositions for superior sulfate resistance with potential for durability and sustainable solutions. Pumiceous volcanic ash was used in …
-
The Application of Post Consumer Glass as a Cementing Agent in Mine Backfill
… The underlying theory indicates that glass is pozzolanic and, when used in finely divided form, reacts as an activator to generate binding products, thus contributing to the development of backfill strength. The objective of the research was to evaluate the strength performance of backfills …
-
The potentials of pennisetum purpureum ash as cement replacement material
… Pennisetum Purpureum ash (PPA) as a natural pozzolan. Limited information was published on the influence of PPA particle size in cement products. Therefore, this study investigated the physical and chemical properties of PPA as a cement replacement material and the effects of particle sizes …
-
Structural performance of precast self-compacting concrete beam consisiting banana skin powder and coir fibre under flexural load
… from XRF test proved that the BSP is the Class F pozzolan which contributes to enhance the strength of SCC. The fresh properties of SCC like filling ability, passing ability and segregation resistance were satisfied the EFNARC SCC specifications. The mechanical properties and ultimate bearing …
-
AI-powered Data Mining for the Development of Sustainable Concrete Materials
… prediction, the currently underexplored lime-pozzolan cement application emerges as a potentially promising future research direction.
-
Environmental consequences associated with ash-stabilisation of organic sludges from the synthol process
… of the synthol sludge (synthol gunk) using a pozzolan system. This was done by preparing stabilised waste forms from synthol gunk and fine ash (ash obtained from the slimes dams, hence has hydrated to some extent). A particle size fraction less than 2 mm of these waste forms were leached with …
-
Characterisation and properties of alkali activated pozzolanic materials.
… slag is slowly cooled in air and it makes a poor pozzolan. Only 1.6 million tons of the slag is available in the granulated form, which is suitable as a cementitious and pozzolanic admixture. Most European countries are well endowed with coal-fired power stations and this produces fly and bottom …
-
The impact of natural and synthetic zeolite when used in cementitious based systems
The production of Portland cement, the most commonly used binding material in the construction and maintenance industry, is one of the principle carbon dioxide emission contributors. Indeed, up to 85% of the cement quantity produced is discharged into the atmosphere. As a result, efforts are being …
-
Valorisation of wind turbine blades into concrete : a contribution towards a more sustainable approach
… (due to the retardant properties of wood and the pozzolanic reaction occurring at the later ages), followed by the increase in compressive strength after 90 days (reaching between 87% and 96% of reference mix strength). The use of CFFT technology resulted in a 90-100% increase in compressive …
-
The productive reuse of coal, biomass and co-fired fly ash
… and permeability was assessed. Furthermore, the pozzolanic reactivity and the microstructural and hydrated phase development of the cement-ash samples were analyzed. The results show that a wood biomass ash sample was not satisfactory for use as an SCM. On the other hand, the findings demonstrate …
-
Influences on durability and leaching behaviour of concrete: new technologies in fly ash production
This report describes a 3 year study carried out to determine the effects of modern coal power generation technologies on the properties of fly ash and how these may affect the use of the material in concrete. A total of 18 fly ashes, from 11 different sources, produced under a range of conditions …