Results 11 to 20 of about 2,625 (181)
Pozzolanic and hydraulic activity of nano-metakaolin
HBRC Journal, 2014 Nano-metakaolin (NMK) was prepared by firing of Nano-kaolin (NK) at different temperatures (750–825 °C) for 2 h. The pozzolanic activities of NMK samples were studied using hydrated lime as an activator.
S.A. Abo-El-Enein +5 more
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Pozzolanic activity of kaolins containing aluminum hydroxide. [PDF]
Sci Rep, 2020 AbstractThe addition of 10 wt% aluminum hydroxide to two crude kaolinitic clays, a commercial and a natural freshly mined one, has enhanced their pozzolanic activity, more substantially in the natural sample containing gibbsite. The obtained blends were used as replacement of 20 wt% of Portland cement in the formulations of pastes and mortars which ...
Tchamo Leussa CC +4 more
europepmc +6 more sources
Pozzolanic Activity of Zeolites: The Role of Si/Al Ratio. [PDF]
Materials (Basel), 2019 A great challenge of research is the utilization of natural or synthetic zeolites, in place of natural pozzolans, for manufacturing blended cements. The difficulties of interpretation of the pozzolanic behavior of natural zeolite-rich materials and the role played by their nature and composition can be overcome by studying more simple systems, such as ...
Liguori B +5 more
europepmc +5 more sources
Influence of ZnO on the activation of kaolinite-based coal waste: Pozzolanic activity and mineralogy in the pozzolan/lime system [PDF]
Applied Clay Science, 2018 Peer ...
García Giménez, Rosario +4 more
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Effects of the secondary minerals of the natural pozzolans on their pozzolanic activity
Cement and Concrete Research, 2008 Abstract Natural pozzolans have been widely used as substitutes for Portland cement, because of their binding properties. Some of them are natural volcanic rocks which contain secondary minerals such as clays and zeolites corresponding to products of the alteration of the rock.
Habert, Guillaume +4 more
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Pozzolanic evaluation of the sugar cane leaf
Materiales de Construccion, 2011 This paper presents the results of the evaluation of the sugarcane leaf, burnt under controlled conditions in order to obtain a reactive ash with pozzolanic properties.
A. Guzmán +4 more
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Difficulties in Determining the Pozzolanic Activity of Thermally Activated Lower-Grade Clays. [PDF]
Materials (Basel)Thermally activated clays (TACs) have been identified as possible supplementary cementitious materials (SCMs). To find a suitable clay and to optimise the activation process, it is necessary to determine its pozzolanic activity. However, the nature of clays is different from that of conventional SCMs. Therefore, the results of commonly used methods may
Šádková K +4 more
europepmc +3 more sources
Preliminary Investigation of Pozzolanic Properties of Calcined Waste Kaolin
Medžiagotyra, 2018 Current research aims to investigate the influence of calcination temperature on the pozzolanic activity of the waste kaolin and the impact of calcination products on Portland cement hydration.
Yang HUANG +4 more
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The Pozzolanic Activity of Calcined Clay – Silica Gel Composites
Medžiagotyra, 2013 The effect of silica gel additive on pozzolanic activity of burned clays was investigated on this study. It was determined that calcined (600 ºC – 730 ºC) clay of Saltiskiai quarry has very low pozzolanic activity (104 mg – 55 mg CaO/g).
Raimonda KUBILIŪTĖ, Rimvydas KAMINSKAS
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Sterile Clay Pozzolans from Phosphate Mining [PDF]
Materials Research, 2015 The work presents the characterization of clays from sterile mining of the concentrated phosphatic materials of Araxá in Minas Gerais as pozzolanic materials. Three clays of distinct tones, namely, yellow (YC), red (RC), and intermediate (IC) clays, were
José Afonso de Matos Neto +5 more
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