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Publikācija: The Effect of Various Pozzolanic Additives on the Concrete Strength Index

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Nosaukums oriģinālvalodā The Effect of Various Pozzolanic Additives on the Concrete Strength Index
Pētniecības nozare 2. Inženierzinātnes un tehnoloģijas
Pētniecības apakšnozare 2.1. Būvniecības un transporta inženierzinātnes
Autori Laura Vītola
Genādijs Šahmenko
Daira Toma
Ģirts Būmanis
Diāna Bajāre
Atslēgas vārdi pozzolanic; concrete
Anotācija The concrete industry is searching continuously for new effective mineral additives to improve the concrete properties. Replacing cement with the pozzolanic additives in most cases has resulted not only in positive impact on the environment but also has improved strength and durability of the concrete. Effective pozzolanic additives can be obtained from natural resources such as volcanic ashes, kaolin and other sediments as well as from different production industries that create various by-products with high pozzolanic reactivity. Current research deals with effectiveness evaluation of various mineral additives/ wastes, such as coal combustion bottom ash, barley bottom ash, waste glass and metakaolin containing waste as well as calcined illite clays as supplementary cementitious materials, to be used in concrete production as partial cement replacement. Most of the examined materials are used as waste stream materials with potential reactive effect on the concrete. Milling time and fineness of the tested supplementary material has been evaluated and effectiveness was detected. Results indicate that fineness of the tested materials has crucial effect on the concrete compressive strength index. Not in all cases the prolonged milling time can increase fineness and reactivity of the supplementary materials; however the optimal milling time and fineness of the pozolanic additives increased the strength index of concrete up to 1.16 comparing to reference, even in cases when cement was substituted by 20 w%.
DOI: 10.1088/1757-899X/251/1/012038
Hipersaite: http://iopscience.iop.org/article/10.1088/1757-899X/251/1/012038/meta 
Atsauce Vītola, L., Šahmenko, G., Toma, D., Būmanis, Ģ., Bajāre, D. The Effect of Various Pozzolanic Additives on the Concrete Strength Index. IOP Conference Series: Materials Science and Engineering, 2017, Vol.251: 3rd International Conference on Innovative Materials, Structures and Technologies (IMST 2017), 1.-10.lpp. ISSN 1757-8981. e-ISSN 1757-899X. Pieejams: doi:10.1088/1757-899X/251/1/012038
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