Results 1 to 10 of about 173,780 (198)

Effects of Supplemetary Cementitious Materials on the Air Permeability of Concrete [PDF]

open access: yesJournal 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
doaj   +2 more sources

Durability and compressive strength of blast furnace slag-based cement grout for special geotechnical applications [PDF]

open access: yesMateriales de Construccion, 2014
Special foundations, most prominently micropiles and soil anchors, are frequently used in construction today. In Spain, the grout for these special technical applications is generally prepared with portland cement, although the codes and standards in ...
J. M. Ortega   +4 more
doaj   +5 more sources

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

CORRESPONDENCE. PORTLAND CEMENT. [PDF]

open access: yesMinutes of the Proceedings of the Institution of Civil Engineers, 1880
n ...
Colson, C.   +14 more
openaire   +2 more sources

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

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