Results 11 to 20 of about 27,661 (213)

Biochar affects compressive strength of Portland cement composites: a meta-analysis [PDF]

open access: yesBiochar
One strategy to reduce CO2 emissions from cement production is to reduce the amount of Portland cement produced by replacing it with supplementary cementitious materials (SCMs).
Zhihao Zhao   +5 more
doaj   +2 more sources

The Influence of Physical Activation of Portland Cement in the Electromagnetic Vortex Layer on the Structure Formation of Cement Stone: The Effect of Extended Storage Period and Carbon Nanotubes Modification

open access: yesBuildings, 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
doaj   +1 more source

Recent Advances in Magnesia Blended Cement Studies for Geotechnical Well Construction—A Review

open access: yesFrontiers 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
doaj   +1 more source

The impact of superplasticizers on the radiation changes in Portland cement stone and concretes [PDF]

open access: yesИнженерно-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
doaj   +1 more source

Process Optimization on Preparation of Composite Portland Cement with Low-grade Pyrite Cinder

open access: yesKuangchan 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
doaj   +1 more source

Motivational factors affecting informal women entrepreneurs in North-West Province

open access: yesThe Southern African Journal of Entrepreneurship and Small Business Management, 2017
Background: Informal women entrepreneurs in the rural villages of North-West strive to progress from poverty to prosperity. There is a growing appreciation that the conditions that support women’s ability to start and grow ventures may be different from ...
Sanchen Henning, Kabira Akoob
doaj   +1 more source

Effect of soluble phosphate, fluoride, and pH in Brazilian phosphogypsum used as setting retarder on Portland cement hydration

open access: yesCase Studies in Construction Materials, 2022
Phosphogypsum (PG) is a residue from the fertilizer industry used by Portland cement companies as a source of calcium sulfate to control the setting time during the hydration (or hardening process).
Rayara Pinto Costa   +5 more
doaj   +1 more source

Modeling the Influence of Ground-Granulated Blast Furnace Slag on Hydration of Cement

open access: yesAdvances in Civil Engineering, 2023
Portland cement is usually substituted with granulated blast furnace slag to make a slag-blended cement. A slag-incorporating cement has a more complicated hydration process than Portland cement due to the interactions between the slag reaction and the ...
Andualem Yadeta   +2 more
doaj   +1 more source

Effect of ultrasonication on carboxyl-functionalized multiwalled carbon nanotubes in fresh and hardened Portland cement pastes [PDF]

open access: yesRevista IBRACON de Estruturas e Materiais, 2023
: The effects of chemical and physical methods on multiwalled carbon nanotube (MWCNT) dispersion in Portland cement pastes were investigated. Consistency, rheology, compressive strength, dynamic elastic modulus, flexural strength, water absorption, and ...
André Valmir Saugo Ribeiro   +4 more
doaj   +1 more source

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