Results 11 to 20 of about 587,728 (349)
Portland cement versus MTA as a root-end filling material. A pilot study [PDF]
Acta Cirúrgica Brasileira, 2015 PURPOSE: To assess periradicular lesions clinically and by computed tomography (CT) after endodontic surgery using either Portland cement or mineral trioxide aggregate (MTA) as a root-end filling material.
Sérgio Ribeiro da Silva +4 more
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Effects of Supplemetary Cementitious Materials on the Air Permeability of Concrete [PDF]
Journal of Materials and Engineering Structures, 2017 In order to support the use of cement combination concrete in construction, this paper investigated the resistance of Portland cement and some binary and ternary cement concretes containing fly ash, silica fume and metakaolin to air permeability at equal
Samuel Olufemi Folagbade
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Ultrafine portland cement performance
Materiales de Construccion, 2018 By mixing several binder materials and additions with different degrees of fineness, the packing density of the final product may be improved. In this work, ultrafine cement and silica fume mixes were studied to optimize the properties of cement-based ...
C. Argiz, E. Reyes, A. Moragues
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Hydration and Fractal Analysis on Low-Heat Portland Cement Pastes Using Thermodynamics-Based Methods
Fractal and Fractional, 2023 Low-heat Portland (LHP) cement is a kind of high-belite cement, which has the characteristic of low hydration heat. Currently, it is extensively used in the temperature control of mass concrete. Based on the thermodynamic database of OPC-based materials,
Yifan Zhou +9 more
semanticscholar +1 more source
Applied Sciences, 2022 Failures of tailings dams, primarily due to liquefaction, have occurred in Brazil in recent years. These events have prompted the Brazilian government to place restrictions on the construction of new dams, as iron ore tailings deposited behind upstream ...
N. Consoli +6 more
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Fractal and Fractional, 2021 In cement-based materials, alkalis mainly exist in the form of different alkali sulfates. In this study, the impacts of different alkali sulfates on the shrinkage, hydration, pore structure, fractal dimension and microstructure of low-heat Portland ...
Li Yang +6 more
semanticscholar +1 more source
Buildings, 2022 The article presents research of the influence of the electromagnetic vortex layer on the structure formation of cement stone during the activation of portland cement, both without additives and with carbon nanotubes modification.
Ibragimov Ruslan +4 more
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Recent Advances in Magnesia Blended Cement Studies for Geotechnical Well Construction—A Review
Frontiers in Materials, 2021 The current paper presents a literature review on the studies of incorporation of magnesia (magnesium oxide) into Portland cement material from the geotechnical well construction perspective.
Weiqing Chen +3 more
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Process Optimization on Preparation of Composite Portland Cement with Low-grade Pyrite Cinder
Kuangchan zonghe liyong, 2023 This is a paper in the field of mineral materials. In order to seek for a new feasible way to utilize low-grade pyrite cinder under local conditions, to solve bottleneck problems of large reserves, and to relieve soil and water pollution, a research on ...
Yonghui Li +4 more
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The impact of superplasticizers on the radiation changes in Portland cement stone and concretes [PDF]
Инженерно-строительный журнал, 2017 The authors have estimated the effect of advanced superplasticizers of types Muraplast, Reamin, Weiss SM, Polyplast SP-1 and Melflux on radiation changes in Portland cement stone and concretes of radiation protection, based on experimental data from ...
A.V. Denisov
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