Effect of Recycled Tire Polymer Fibers on Autogenous Deformation of Self-Compacting Concrete

RILEM Technical Letters

Nina Štirmer¹  Marija Jelčić Rukavina¹  Ana Baričević¹  Martina Grubor² 

[1] ;University of Zagreb;

关键词: Self-compacting concrete;    Autogenous deformation;    Recycled tire polymer fibers;   

DOI  :  10.21809/rilemtechlett.2020.115

来源: DOAJ

【 摘 要 】

Self-compacting concrete requires a special composition with an increased proportion of fine particles and larger volumes of paste compared to traditional vibrated concrete. Larger volumes of paste increase autogenous deformation, which can cause microcracking of concrete. The aim of this paper is to research the possibility of using recycled polymer fibers obtained from end-of-life tires to prevent micro cracking due to autogenous deformation in self-compacting concrete. Mixes of self-compacting concrete containing 1 and 2 kg/m3 of recycled tire polymer fibers and reference mixes were prepared and tested. Beside autogenous deformation, fresh state properties as well as compressive strength at the age of 3, 7 and 28 days were tested. The results of the performed laboratory tests indicate that the use of recycled tire polymer fibers is effective for the reduction of early autogenous deformation with insignificant difference in compressive strength at tested ages.

【 授权许可】

Unknown