Results 111 to 120 of about 4,951,536 (143)
Natural Pozzolana Addition Effect on Compressive Strength and Capillary Water Absorption of Mortar
Energy Procedia, 2017 Abstract The cement manufacturing is the one of the factors that pollutes the atmosphere in the industrial sector. The common way to reduce this pollution is using mineral additives as partial replacement of Portland cement. Particularly, natural pozzolana (NP) is a component in which they can be used to decrease the rate of pollution.
Walid Deboucha, Nordine Leklou
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Mechanical and Thermal Properties of HSC with Fine Natural Pozzolana as SCM
Materials Science Forum, 2015The article describes the influence of fine natural pozzolana as supplementary cementitious material on the properties of high strength concrete. Natural pozzolana (NP) is a porous material which results in higher porosities and thus lower compressive strength when used in high replacement levels. But if only a small part of cement (up to 10% of weight)
Jaroslava Koťátková +3 more
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Mechanical and durability properties of cement mortar with Algerian natural pozzolana
Journal of Materials Science, 2006This paper presents a study of the properties and behaviour of cement mortar with natural pozzolana from Algeria. The effect of level of addition of natural pozzolana (0, 10, 20, 30, and 40%) on the mechanical properties of mortars at different ages as well as the effect of curing environment and the period of initial curing on the mechanical ...
M. Ghrici, S. Kenai, E. Meziane
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Construction and Building Materials, 2019 The improvement of the mechanical properties of geopolymer matrices relies on the characteristics of the source materials as well as in proper optimization of the alkaline activating solution and curing conditions during geopolimerization.
Javier Nakamatsu +2 more
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Properties of SCC Prepared Using Natural Pozzolana and Industrial Wastes as Mineral Fillers
Cement and Concrete Composites, 2015Abstract The high unit cost of self-consolidating concrete (SCC) resulting from the use of conventional filler materials, such as fly ash or silica fume, has been identified as the main hindrance to its widespread use particularly at places where these materials are not available locally.
Shamsad Ahmad +2 more
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Mineralogy and thermal analysis of natural pozzolana opal shale with nano-pores
Journal of Wuhan University of Technology-Mater. Sci. Ed., 2017Thermodynamic stability, microvoid distribution and phases transformation of natural pozzolana opal shale (POS) were studied systematically in this work. XRD analysis showed that opal-CT, including microcrystal cristobalite and tridymite, is a major component of POS.
Yuan Jia, Baomin Wang
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Behavior of Natural Pozzolana-Lime-stabilized Clayey Soils Artificially Contaminated by Sulfates
Jordan Journal of Civil Engineering, 2023The use of lime in sulfate-bearing clayey soils has historically caused structural damage to infrastructures due to the formation of an expansive ettringite mineral. In this paper, a research was conducted to study the effectiveness of natural pozzolana (NP) for providing better stabilization of sulfate-bearing soils.
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Effect of Recycled Concrete Aggregates and Natural Pozzolana on Rheology of Self-Compacting Concrete
Key Engineering Materials, 2014Self-compacting concrete (SCC) is a very fluid concrete in which its compaction can take place under the effect of its own weight, without vibration. SCC is characterized by its high volume of paste, and the use of superplasticizers. Very little work is reported in the literature on the use of recycled aggregates in SCC.
Said Kenai +3 more
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STUDIES IN ENGINEERING AND EXACT SCIENCES
When investigating the potential use of lime and natural pozzolana for subgrade soils containing phosphate, especially on agricultural lands, the effectiveness of these traditional binders needs to be assessed because of the possible deleterious effect of phosphates anions.
Ali Bachir Oussama +2 more
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When investigating the potential use of lime and natural pozzolana for subgrade soils containing phosphate, especially on agricultural lands, the effectiveness of these traditional binders needs to be assessed because of the possible deleterious effect of phosphates anions.
Ali Bachir Oussama +2 more
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Qualitative Analysis of Natural Pozzolanas, Fly Ashes, and Blast Furnace Slags by XRD
Journal of Materials in Civil Engineering, 1990This paper contributes to the knowledge of materials known as active additions, which can be added to Portland cement to give it properties that improve its performance behavior. This knowledge is obtained by X‐ray diffraction (XRD), which in a few minutes gives a spectrum by which the crystalline phases can be identified by its peaks, as well as some ...
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