New generation concretes including reactive powder concretes

Biuletyn Wojskowej Akademii Technicznej

Stefania Grzeszczyk¹ 

[1] Politechnika Opolska, Wydział Budownictwa, Katedra Inżynierii Materiałów Budowlanych, 45-061 Opole, ul. Katowicka 48;

关键词: Civil Engineering;    reactive powder concrete;    composite materials;   

DOI  :  10.5604/12345865.1168727

来源: DOAJ

【 摘 要 】

Based on a broad literature review, this paper presents characteristics of new generation composites on the basis of cements which are applied in engineering structures and in rehabilitation of structures. The role of cement, microfillers, superplasticizers and fibers in the above stated composites i.e. factors which allow for the maximum packing of particles in the cement matrix and a minimum pore volume, and the increase in composite bending strength, have been discussed. Special attention was paid to Reactive Powder Concrete in which coarse aggregate was replaced by ground quartz and sand. Such composites contain active microfillers and the applied new-generation superplasticizers allow us to decrease the water-cement ratio in the composite up to 0.2. Whereas, steel fibre additive allows us to significantly improve the bending strength.The paper presents the properties of the excellent Ductal — a composite from Reactive Powder Concrete, which at compressive strength from 180 to 230 MPa achieves the tensile strength of 30 to 50 MPa. Its application allows us to create slim profiles and tall light and slender, and simultaneously durable and corrosion-resistant structural elements of considerable span. This paper gives a few examples of Ductal application in practice.[b]Keywords[/b]: civil engineering, composite materials, reactive powder concrete

【 授权许可】

Unknown