6th International Conference on Computational Mathematics and Engineering Sciences / 20-22 May. 2022, Ordu – Turkey, Ordu, Türkiye, 20 Mayıs - 22 Haziran 2022, cilt.1, sa.1, ss.10-21
Mechanical and micro analyzes were
carried out on the recycled concrete samples obtained by preparing different mixtures
of geopolymer powder, metakaolin, lime, quartz and sodium silicate as alkali
activator and sodium hydroxide solution, which were formed by grinding the
geopolymer concrete samples prepared with certain temperature and low curing
times. Recycled concrete samples with geopolymer powder, with a weight ratio of
36% in 1m3 volume, were prepared at 60 for 6-8-10 hours of curing. The test results
showed that the highest compressive strength of the mixtures was 77.89 MPa with
the increase of the lime ratio in the 8 hour curing period. It was determined
that the highest compressive strength was 73 MPa in the samples in which
metakaolin was never used and the lime ratio was maximum, the compressive
strengths of the samples with 0.05% lime ratio of metakaolin and 0.025% lime
ratio of metakaolin and 0.05% lime ratio of metakaolin were 74 and 77.89 MPa,
respectively. In addition, capillary permeability tests were also carried out
on the samples. Capillarity coefficients of geopolymer mixtures are below 0.377
kg/m2.min0.5. It has been suggested that concrete mixtures produced from
recycled geopolymer powder can be used in the load-bearing elements of
structures that need to remain at the level of use immediately under the effect
of dynamic load.
Mechanical and micro analyzes were
carried out on the recycled concrete samples obtained by preparing different mixtures
of geopolymer powder, metakaolin, lime, quartz and sodium silicate as alkali
activator and sodium hydroxide solution, which were formed by grinding the
geopolymer concrete samples prepared with certain temperature and low curing
times. Recycled concrete samples with geopolymer powder, with a weight ratio of
36% in 1m3 volume, were prepared at 60 for 6-8-10 hours of curing. The test results
showed that the highest compressive strength of the mixtures was 77.89 MPa with
the increase of the lime ratio in the 8 hour curing period. It was determined
that the highest compressive strength was 73 MPa in the samples in which
metakaolin was never used and the lime ratio was maximum, the compressive
strengths of the samples with 0.05% lime ratio of metakaolin and 0.025% lime
ratio of metakaolin and 0.05% lime ratio of metakaolin were 74 and 77.89 MPa,
respectively. In addition, capillary permeability tests were also carried out
on the samples. Capillarity coefficients of geopolymer mixtures are below 0.377
kg/m2.min0.5. It has been suggested that concrete mixtures produced from
recycled geopolymer powder can be used in the load-bearing elements of
structures that need to remain at the level of use immediately under the effect
of dynamic load.