Results 31 to 40 of about 440,118 (241)
Modelling the Pb release during Portland cement alteration [PDF]
Advances in Cement Research 21, 1 (2009) 1-10, 2014 Complex cementitious matrices undergo weathering with environmental exchange and can release metallic pollutants during alteration. The molecular mechanisms responsible for metal release are difficult to identify, though this is necessary if such processes are to be controlled.
arxiv +1 more source
Properties of paving units incorporating slag cement
HBRC Journal, 2013 The aim of this study is to investigate the effect and possibility of using Portland slag cement in the production of interlocking paving units. Paving units consist of two layers. Four mixes were cast.
Hanan A. El Nouhy
doaj +1 more source
Chemo-mechanical characterization of hydrated Calcium-Hydrosilicates with coupled Raman and nanoindentation measurements [PDF]
Applied Geochemistry Volume 118, July 2020, 104582, 2020 Celitement is a new type of cement that is based on hydraulic calcium-hydrosilicate (hCHS) that possesses a potential for minimizing the ratio C/S from above 3 in OPC down to 1, which significantly reduces the amount of CO$_2$ released during processing.
arxiv +1 more source
Synchrotron Microtomography and Neutron Radiography Characterization of the Microstruture and Water Absorption of Concrete from Pompeii [PDF]
Cement and Concrete Research 139 (2021) 106282, 2020 There is renewed interest in using advanced techniques to characterize ancient Roman concrete. In the present work, samples were drilled from the "Hospitium" in Pompeii and were analyzed by synchrotron microtomography (uCT) and neutron radiography to study how the microstructure, including the presence of induced cracks, affects their water adsorption.
arxiv +1 more source
Advances in Materials Science and Engineering, 2015 The performance of Portland cement in concrete or mortar formation is very well influenced by chemical compositions among other factors. Many engineers usually have little information on the chemical compositions of cement in making decisions for the ...
Mark Bediako, Eric Opoku Amankwah
doaj +1 more source
The Effects of Mineral Wool Fly Ash on Cohesive Soil Strength Behaviour
The Baltic Journal of Road and Bridge Engineering, 2021 This research work represents updated results of cohesive soil strength improvement with mineral wool fly ash. In the investigations, these materials were used: Portland cement CEM I 42.5 R, fly ash obtained from a mineral wool production process, sand ...
Mindaugas Zakarka +3 more
doaj +1 more source
Biochar affects compressive strength of Portland cement composites: a meta-analysis. [PDF]
BiocharOne 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).
Zhao Z +5 more
europepmc +2 more sources
Sand-Filler Structural Material with Low Content of Polyethylene Binder [PDF]
, 2020 Currently, most of the waste plastics cannot be recycled, causing serious environmental concerns. In this research, we investigated a compaction formation technology to fabricate structural materials with thermoplastic binders. When the compaction pressure was 70~100 MPa, with only ~10 wt% polyethylene binder, the flexural strength was greater than ...
arxiv +1 more source
Applied Nanoscience, 2019 This contribution investigates the effects of seawater and colloidal silica (NS) in the amounts of 1, 3 and 5 wt%, respectively, on the hydration, strength development and microstructural properties of Portland cement pastes.
P. Sikora +5 more
semanticscholar +1 more source
The effect of cement modification on the rheological properties of cement paste
Journal of Civil Engineering and Management, 2014 Experimental tests have determined the effect of slag, opoka (silica-calcite sedimentary rock), silica fume (SiO2) suspension, dolomite dust and sodium silicate solution (NaSS) together with the polycarboxylatether based plasticizing admixture on the ...
Eugenijus Janavičius +4 more
doaj +1 more source