TY - JOUR
T1 - COMPARATIVE CHARACTERISTICS OF REACTIVE POWDER CONCRETES USING FLY ASH AND MICROSILICA
AU - Dvorkin, Leonid
AU - Zhitkovsky, Vadim
AU - Ribakov, Yuri
N1 - Publisher Copyright:
© 2023, Fundatia Serban Solacolu. All rights reserved.
PY - 2023
Y1 - 2023
N2 - Reactive powder concrete (RPC) is an efficient type of fine-grained concrete with extreme strength and durability characteristics. The use of RPC allows the construction of such unique objects as pedestrian and automobile bridges, thin-walled architectural forms, protective structures, hazardous waste storage facilities, etc. Obtaining RPC provides for the mandatory use of a significant amount of microsilica as an active mineral additive, which is not always available for use. The article presents the results of comparing the strength characteristics of RPC obtained on microsilica and with its complete replacement with fly ash activated by milling with sodium silicate fluoride. The studies were carried out using mathematical planning of the experiment. Experimental-statistical models of RPC water demand and compressive and flexural strength at different ages have been obtained and analyzed. It is shown that the use of activated ash in the RPC makes it possible to obtain concrete with a strength of 100…110 MPa in 28 days. A method for calculating the composition of the RPC using the obtained models is proposed.
AB - Reactive powder concrete (RPC) is an efficient type of fine-grained concrete with extreme strength and durability characteristics. The use of RPC allows the construction of such unique objects as pedestrian and automobile bridges, thin-walled architectural forms, protective structures, hazardous waste storage facilities, etc. Obtaining RPC provides for the mandatory use of a significant amount of microsilica as an active mineral additive, which is not always available for use. The article presents the results of comparing the strength characteristics of RPC obtained on microsilica and with its complete replacement with fly ash activated by milling with sodium silicate fluoride. The studies were carried out using mathematical planning of the experiment. Experimental-statistical models of RPC water demand and compressive and flexural strength at different ages have been obtained and analyzed. It is shown that the use of activated ash in the RPC makes it possible to obtain concrete with a strength of 100…110 MPa in 28 days. A method for calculating the composition of the RPC using the obtained models is proposed.
KW - concrete mix composition
KW - design
KW - experimental-statistical model
KW - fly ash
KW - microsilica
KW - planning of experiments
KW - reactive powder concrete
KW - strength
UR - http://www.scopus.com/inward/record.url?scp=85183858134&partnerID=8YFLogxK
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AN - SCOPUS:85183858134
SN - 1583-3186
VL - 53
SP - 306
EP - 315
JO - Revista Romana de Materiale/ Romanian Journal of Materials
JF - Revista Romana de Materiale/ Romanian Journal of Materials
IS - 4
ER -