Results 71 to 80 of about 588,723 (351)

Preparation of Portland Cement with Gold Ore Tailings

open access: yesAdvances in Materials Science and Engineering, 2019
The disposal of gold ore tailings (GTs) has been a very difficult problem for a long time. Thus, this study explored a new approach to the management of GTs by preparing Portland cement.
Qiang Wang   +5 more
semanticscholar   +1 more source

Quality of type I Portland cement from Ghana and UK [PDF]

open access: yes, 2015
Type I Portland cement is general purpose cement found in many countries and it is manufactured by different companies. This study sought to compare the properties of Type I Portland cements from Ghana (less economically developed country) and United ...
Boateng, Isaac, Danso, Humphrey
core   +2 more sources

Gels for CO2 geo‐storage and conformance control: A systemic review of behavior and performance

open access: yesDeep Underground Science and Engineering, EarlyView.
This review provides a systemic evaluation of potential sealants used in CO2 subsurface storage practices. Critical analyses of how external factors like CO2, pH, brine salinity and hardness, rock mineralogy, pressure, temperature, and injectivity could affect the performance of different sealants are provided. Abstract Carbon capture and storage (CCS)
Funsho Afolabi   +6 more
wiley   +1 more source

Utilization of Iron Ore Tailings as Raw Material for Portland Cement Clinker Production

open access: yesAdvances in Materials Science and Engineering, 2016
The cement industry has for some time been seeking alternative raw material for the Portland cement clinker production. The aim of this research was to investigate the possibility of utilizing iron ore tailings (IOT) to replace clay as alumina-silicate ...
Li Luo   +3 more
doaj   +1 more source

Optimal Pre-hydration Age for CO2 Sequestration through Portland Cement Carbonation

open access: yesACS Sustainable Chemistry and Engineering, 2018
An emerging technology of CO2 sequestration in Portland cement (PC) is through accelerated carbonation, where PC is intentionally carbonated at early hydration age and reinitiates long-term hydrati...
Duo Zhang, V. Li, B. Ellis
semanticscholar   +1 more source

A review of the methods used to study biocompatibility of Portland cement-derived materials used in dentistry [PDF]

open access: yes, 2006
Advanced restorative dentistry may necessitate the need for surgical intervention to the infected root apex. Once access to the root end is achieved, the root apex is resected and filled with a dental restorative material.
Camilleri, Josette
core  

Study on the Hierarchical Grouting Reinforcement Control of Low Permeability Surrounding Rocks of Deep Roadway

open access: yesEnergy Science &Engineering, EarlyView.
Mechanism and Application of Hierarchical Grouting in Low‐Permeability Surrounding Rocks ABSTRACT To solve the problem of grouting reinforcement of low permeability argillaceous surrounding rocks of deep roadway, the zonal failure characteristics of the surrounding rock and the mechanism and technology of hierarchical grouting reinforcement were ...
Tongqiang Xiao   +6 more
wiley   +1 more source

A flat posterior cruciate ligament reconstruction restores native knee kinematics, comparable to a double‐bundle reconstruction—A biomechanical robotic investigation

open access: yesKnee Surgery, Sports Traumatology, Arthroscopy, EarlyView.
Abstract Purpose To biomechanically evaluate a flat posterior cruciate ligament (PCL) reconstruction utilizing rectangular femoral bone tunnels. Methods Eight fresh‐frozen human knee specimens were tested in a six‐degrees‐of‐freedom robotic test setup. In each testing step, a force‐controlled test protocol was performed, including 89 N posterior tibial
Adrian Deichsel   +8 more
wiley   +1 more source

Analyses of microstructural properties of VA/VeoVA copolymer modified cement pastes

open access: yesPolímeros, 2005
Recently, modern techniques have been applied for analysis of the influence of polymers on microstructural properties of Portland cement, such as Thermogravimetric Analyses (TG), Scanning Electronic Microscopy (SEM), Fourier Transform Infrared ...
Carlos Eduardo M. Gomes   +1 more
doaj   +1 more source

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