scholarly journals Improvement of physical and mechanical properties of portland cement by introduction of prominent rocks of Uzbekistan

2020 ◽  
Vol 3 (8) ◽  
pp. 200-208
Author(s):  
Mukhiddinov Dilshod Davronovich
Keyword(s):  
Mechanical Properties ◽  
Portland Cement ◽  
Chemical Interaction ◽  
Physical And Mechanical Properties ◽  
Cement Composite ◽  
Technological Properties ◽  
Rapid Absorption ◽  
Hydrolysis Of

This article is devoted to the study of technological properties of opokoid rocks of Uzbekistan and their influence on physical and mechanical indices of Portland cement of JSC "Kizilkumcement." Accelerated hydrolysis of Portland cement minerals and their chemical interaction with additive on principle of acid-basic interaction, which leads to increased degree of compaction and structural strengthening of formed cement composite due to rapid absorption of lime and opocy rock with developed structure, are shown.

scholarly journals Influence of nanocellulose on the hydration process of Portland cement and concrete properties

2020 ◽  
Vol 17 (5) ◽  
pp. 155-160
Author(s):  
V. I. Khirkhasova ◽  
Keyword(s):  
Mechanical Properties ◽  
Portland Cement ◽  
Physical And Mechanical Properties ◽  
Cement Composite ◽  
High Density ◽  
Strength Characteristics ◽  
New Method ◽  
Concrete Properties ◽  
Hardening Process ◽  
Study Results

The paper deals with modification of cement composite and concrete with nanocellulose in low and high density. The author presents the study results of the influence of nanocellulose on the cement composite hardening process, as well as the physical and mechanical properties of heavy concrete. The influence of the used additive on the rheological and strength characteristics of concrete is revealed. A new method is proposed to improve the material performance.

scholarly journals Physical and mechanical properties of foamed Portland cement composite containing crumb rubber from worn tires

2014 ◽  
Vol 59 ◽  
pp. 550-557 ◽  
Author(s):  
J.N. Eiras ◽  
F. Segovia ◽  
M.V. Borrachero ◽  
J. Monzó ◽  
M. Bonilla ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Portland Cement ◽  
Physical And Mechanical Properties ◽  
Cement Composite ◽  
Crumb Rubber

Basic Physical and Mechanical Properties of Composites Based on Three Different Cements

2016 ◽  
Vol 677 ◽  
pp. 186-190 ◽  
Author(s):  
Monika Čáchová ◽  
Eva Vejmelková ◽  
Kateřina Šestáková ◽  
Pavel Reiterman ◽  
Martin Keppert ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Portland Cement ◽  
Open Porosity ◽  
Mercury Porosimetry ◽  
Physical And Mechanical Properties ◽  
Mineralogical Composition ◽  
Physical Parameters ◽  
Vacuum Saturation ◽  
Saturation Method ◽  
Properties Of Composites

This article is focused on cement based composites. Two cements differing in mineralogical composition are utilised as main binder in composites mixtures. Results of measured physical parameters of studied materials are presented. For the sake of comparison, a reference material with Portland cement was also prepared. Basic physical properties (measured by water vacuum saturation method and by helium pycnometry), characterizations of pore system (determined by mercury porosimetry) and mechanical properties are the matter of this study. Composites show various open porosity; the results of open porosity of materials containing special cements show higher values, in comparison with composite based on Portland cement. This fact of course influences other material characteristics - mainly mechanical properties.

scholarly journals MICROESTRUTURA E PROPRIEDADES FÍSICAS E MECÂNICAS DE CIMENTO PORTLAND TIPO II ÁLCALI-ATIVADO / MICROSTRUCTURE AND PHYSICAL AND MECHANICAL PROPERTIES OF ALKALI-ACTIVATED TYPE II PORTLAND CEMENT

2020 ◽  
Vol 6 (11) ◽  
pp. 84929-84951
Author(s):  
Luccas Mansur Feuchard ◽  
Cléo Márcio de Araújo Santana ◽  
Eliane Fernandes Côrtes Pires ◽  
Fernando Luiz Barbuda de Abreu ◽  
Elie Chahdan Mounzer ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Portland Cement ◽  
Physical And Mechanical Properties ◽  
Type Ii ◽  
Alkali Activated

scholarly journals Physical and Mechanical Properties of Wood-Cement Composite with Lignocellulosic Grading Waste Variation

2014 ◽  
Vol 4 (2) ◽  
pp. 69-72 ◽  
Author(s):  
Ronquim Renato Marini ◽  
Ferro Fabiane Salles ◽  
Icimoto Felipe Hideyoshi ◽  
Campos Cristiane Inácio ◽  
Bertolini Marília da Silva ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Cement Composite

scholarly journals Assessment of Physical and Mechanical Properties of Concrete Produced from Various Portland Cement Brands

2019 ◽  
Vol 09 (04) ◽  
pp. 327-337
Author(s):  
Asal Soltani ◽  
Salim Khoso ◽  
Manthar Ali Keerio ◽  
Antonio Formisano
Keyword(s):  
Mechanical Properties ◽  
Portland Cement ◽  
Physical And Mechanical Properties

Structure and Mechanical Properties of Portland Cement-Polyacrylnitril Fiber Composites

1987 ◽  
Vol 114 ◽  
Author(s):  
I. Odler
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Portland Cement ◽  
Fracture Mechanism ◽  
Cement Composite ◽  
Fiber Composites ◽  
Cement Composites ◽  
Cement Ratio ◽  
Variable Water ◽  
Pan Fibers

ABSTRACTA series of fiber-cement composite materials was prepared by dispersing different amounts of polyacrylnitril (PAN) fibers in portland cement suspensions of variable water/solid ratios. The samples were used to study the effect of the volume of fibers and the water-cement ratio on the physico-mechanical properties of the material. The distribution of the fibers within the cementitious matrix and the fracture mechanism were studied by SEM and compared with those existing in glass fiber-cement composites.

Influence of Portland Cement Addition in the Physical and Mechanical Properties of Epoxy Resin

2015 ◽  
Vol 1088 ◽  
pp. 411-414 ◽  
Author(s):  
Francisco Augusto Zago Marques ◽  
Carlos Eduardo G. da Silva ◽  
André Luis Christoforo ◽  
Francisco Antonio Rocco Lahr ◽  
Túlio Hallak Panzera ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Composite Material ◽  
Portland Cement ◽  
Physical Properties ◽  
Epoxy Resin ◽  
Modulus Of Elasticity ◽  
Epoxy Matrix ◽  
Physical And Mechanical Properties ◽  
Response Variable

This research evaluated, with the of the analyses of variance (ANOVA), a composite material based on epoxy matrix phase reinforced with Portland cement (CP-II) particles (0%wt [100%wt of resin], 20%wt, 40%wt, 60%wt). The response-variable investigated were modulus of elasticity (E) and compressive strength (S), bulk density (ρB), apparent density (ρA) and porosity (P). The highest values of the modulus of elasticity were provided from the composites manufactured with 40wt% of cement addition. The inclusion of 60% of cement implies in a reduction in the mechanical properties when compared with the results of the composite manufactured with 40% of cement. For the physical properties, the gradually inclusion of cement provides increasing in the density of the composites, and reduce the porosity of the materials manufactured.

Microstructure and Mechanical Properties of Cement/Fly Ash/Natural Rubber Composites

2017 ◽  
Vol 866 ◽  
pp. 195-198
Author(s):  
Rakchanok Promudom ◽  
Suparut Narksitipan ◽  
Nittaya Jaitanong
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Portland Cement ◽  
Natural Rubber ◽  
Natural Rubber Latex ◽  
Physical And Mechanical Properties ◽  
Ammonia Solution ◽  
Rubber Latex ◽  
Water To Cement Ratio ◽  
Natural Rubber Composites

The physical and mechanical properties of Portland cement (PC) - natural rubber latex (NRL) - fly ash (FA) composites have been investigated. The latex per cement ratios that use in this experiment are 0, 5, 7.5 and 10% by weight of cement. Portland cement (PC) was partially replaced with fly ash 0-40% by weight of binder. Water to cement ratio were used in range of 0.305-0.385 (by weight not include water in latex). Nonionic surfactant was added in cement before mixed with natural rubber latex. In addition, to provide latex from natural rubber latex, the ammonia solution is added into natural rubber. The specimens were packing into an iron mold which sample size of 4x4x16 cm3. Moreover, the PC-NRL-FA composites were cured in water for 7 and 28 days at room temperature before measurement. Then, mechanical properties (flexural strength) and microstructure were studied.

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