Results 11 to 20 of about 102,646 (304)

An assessment of welding distortion analysis using thermal shrinkage technique for a construction machinery structure

open access: yesNihon Kikai Gakkai ronbunshu, 2022
The thermal shrinkage technique, which uses shrinkage strain and shrinkage zone to calculate welding distortion, is expected as a simple simulation to predict the welding distortion of large weld structures.
Hiroki MURAKAMI   +4 more
doaj   +1 more source

Structural and heat-insulating cement-based concrete with complex glyoxal based additive [PDF]

open access: yesНанотехнологии в строительстве, 2022
: Introduction. The article presents the results of studies of the effect of complex additive based on glyoxal on the properties of cement-based foam concrete mix and foam concrete of natural hardening. The relevance of the study is determined by the
Aleksei B. Steshenko   +3 more
doaj   +1 more source

Monitoring early-age acoustic emission of cement paste and fly ash paste [PDF]

open access: yes, 2020
In this study, a combined approach of several monitoring techniques was applied to allow correlations between the AE activity and related processes such as shrinkage and settlement evolution, capillary pressure and temperature development in fresh ...
Aggelis, Dimitrios G.   +2 more
core   +1 more source

Numerical simulation of closed plastic impeller molding process and its parameter optimization

open access: yesScientific Reports, 2022
Aiming at the warping deformation and volume shrinkage of the closed plastic impeller, the relevant compression molding process parameters were optimized.Based on the theoretical equation of the pressing pressure for general sheet plastics, the ...
Mingyue Fang   +2 more
doaj   +1 more source

Behavior of drying and plastic shrinkage of Portland cement concrete prepared and cured under harsh field

open access: yesDevelopments in the Built Environment, 2023
The shrinkage of concrete is crucial under aggressive environmental conditions to avoid short and long-term deterioration. ACI committee for hot weather concreting specifies 35 °C as the maximum limit of fresh concrete to mitigate problems associated ...
Muhammad Nasir   +4 more
doaj   +1 more source

Material and Process Parameters that Affect Accuracy in Stereolithography [PDF]

open access: yes, 1993
Experimental real time linear shrinkage rate measurements simulating stereolithography are used in an analysis of shrinkage during line drawing in stereolithography.
Chartoff, Richard P.   +2 more
core   +1 more source

Influence of shrinkage-reducing admixtures on plastic and long-term shrinkage [PDF]

open access: yesCement and Concrete Composites, 2011
The use of shrinkage-reducing admixtures (SRA) has been suggested to improve concrete performance in terms of lower risk of cracking related to drying shrinkage. Various forms of SRA are commercially available and they may act through different mechanisms. Some SRA mainly acts on drying and weight loss leading to shrinkage. In this paper, the influence
Saliba, Jacqueline   +3 more
openaire   +3 more sources

Application of Cement-Based Carbon Fiber Material in Construction of Building Durability

open access: yesInternational Journal of Analytical Chemistry, 2022
In order to solve the problem of drying shrinkage of cement-based carbon fiber materials in the early stage of hardening, the author proposes the application of cement-based carbon fiber materials in the construction of building durability.
Qiuhong Li   +3 more
doaj   +1 more source

Modeling the Influence of Environmental Factors on Concrete Evaporation Rate [PDF]

open access: yesJournal of Soft Computing in Civil Engineering, 2020
Newly poured concrete opposing hot and windy conditions is considerably susceptible to plastic shrinkage cracking. Crack-free concrete structures are essential in ensuring high level of durability and functionality as cracks allow harmful instances or ...
Vasileios Papadimitropoulos   +2 more
doaj   +1 more source

Crack mitigation in concrete : superabsorbent polymers as key to success? [PDF]

open access: yes, 2017
Cracking is a major concern in building applications. Cracks may arise from shrinkage, freeze/thawing and/or structural stresses, amongst others. Several solutions can be found but superabsorbent polymers (SAPs) seem to be interesting to counteract these
De Belie, Nele   +4 more
core   +3 more sources

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