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 11 of 11 for “"pozzolanic activity"”.
-
Avaliação das incertezas nas informações sobre as resistências à tração na flexão e compressão de argamassas cimentícias com lodo de ETA
… % higher than the control, possibly due to the pozzolanic activity confirmed by the Pozzolanic Activity Index (PAI) and Modified Chapelle tests. The relative standard uncertainties for flexural and compressive strengths were below 5 %, consistent with laboratory measurement conditions. The …
-
Stabilization of non-plastic soils with calcium hydroxide-calcium carbonate mixtures
… that the presence of carbonate enhances pozzolanic activity in lime-stabilized non-plastic soils by increasing the solubility of siliceous minerals at high pH levels.
-
Um Estudo Físico-Químico-Matemático da Estabilização Alcalina de Solos Argilosos
… equation seems to model satisfactorly the pozzolanic activity. It is argued that water content of compacted soils is not enough to provide for thorough dissolution of lime, therefore cationic exchange does not seem to be an adequate mechanism of alkaline stabilization. Arguments support the …
-
Properties of Western Cape concrete with metakaolin
… metakaolin in terms of its morphology and pozzolanic activity, ii) to assess the influence of metakaolin on fresh and hardened concrete properties, and to compare these with the properties of concrete with GGCS, iii) to assess the influence of metakaolin on the deformation behaviour of …
-
Performance of self-compacting concrete incorporating palm oil fuel ash and egg shell powder as partial cement replacement
… utilization of POFA and ESP enhanced the pozzolanic activity, thus, developing additional calcium silicate hydride (C-S-H) gels which are responsible for the gain in strength. The combined utilization of POFA and ESP as a cement replacement in SCC had good effect on the compressive and …
-
Influencia de las adiciones puzolánicas en los morteros de restauración de fábricas de interés histórico-artístico
… mortars made of lime mixed with hydraulic, pozzolanic and tixotropic additions. And to study its relation to natural hydraulic limes (NHL). Pozzolanic activation was first studied, concerning to burning time an temperature. Moreover, chemical analysis (Fratini), thermal analysis (TG/DTA) an …
-
Practical Applications of Infrared, Raman and Nuclear Magnetic Resonance Spectroscopic Techniques for Qualitative, Quantitative and Structural Analysis of Pharmaceutical Drugs, Cementitious Material and Organic Molecules Containing Phosphorous
… clay using TGA, FTIR, NMR, and their relation to pozzolanic activity to best understand the potential of this abundant resource to alleviate cement supply burdens.
-
Evaluating reactivity and sorptivity of fly ash for use in concrete construction
… techniques for (i) rapidly assessing the reactivity of fly ash; and (ii) evaluating its interaction with air-entraining admixtures (AEAs), both with regard to use in concrete. The materials considered for the project included, 54 fly ashes from 8 UK sources, and an additional three materials …
-
Studium aktivity pucolánu připraveného karbonatací vyzrálého cementu ovlivněného zinečnatými ionty
Tato diplomová práce se zaměřuje na studium pucolánu připraveného karbonatací vyzrálé cementové pasty ovlivněné zinečnatými ionty. Hlavním podnětem práce je přítomnost pozinkované výztuže ve starých betonech, ze které se mohou zinečnaté ionty do cementové matrice uvolňovat. Tato práce zkoumá, zda …
-
Synergistic and Environmental Benefits of Using Cement Kiln Dust With Slag and Fly Ash in Cemented Paste Tailings
… result of proliferating hydration and augmented pozzolanic reactivity. Previous studies carried out by other researchers on hardened cemented paste tailings specimens containing Portland cement-pozzolans binders confirmed the possibility of the presence of un-reacted or un-hydrated particles of …
-
Možnosti využití látek s možnou pucolánovou aktivitou pro přípravu směsných cementů
Směsný cement; kalcinace; dehydroxylace, břidlice, vápenec, pucolánová aktivita, modifikovaný Chapelle test, metakaolinit, fylosilikáty, jílové minerály, kaolinit, C–S–H gel