this paper is based on an experimental research that examined the effects of concrete`s major parameters on durability of concrete pavements and curbs under freezing and thawing cycles. these parameters include concrete mix design parameters such as water-cement ratio, fine aggregate percentage and using air entraining admixture and simulating real freeze-thaw cycles that infrastructures underg...

This paper is based on an experimental research that examined the effects of concrete`s major parameters on durability of concrete pavements and curbs under freezing and thawing cycles. These parameters include concrete mix design parameters such as water-cement ratio, fine aggregate percentage and using air entraining admixture and simulating real freeze-thaw cycles that infrastructures underg...

In order to improve the durability of fly ash concrete, a series of experimental studies are carried out, where durability improving admixture is used to reduce drying shrinkage and improve freezing-thawing resistance. The effects of durability improving admixture, air content, water-binder ratio, and fly ash replacement ratio on the performance of fly ash concrete are discussed in this paper. ...

This paper presents results of compressive strength, capillary water absorption, and density tests conducted on concrete containing recycled aggregate (RCA) which is obtained from structural waste generated by the construction industry in Turkey. In the experiments, 0%, 15%, 30%, 45% and 60% of the normal (natural) coarse aggregate was replaced by the recycled aggregate. Maximum aggregate parti...

This paper presents results of compressive strength, capillary water absorption, and density tests conducted on concrete containing recycled aggregate (RCA) which is obtained from structural waste generated by the construction industry in Turkey. In the experiments, 0%, 15%, 30%, 45% and 60% of the normal (natural) coarse aggregate was replaced by the recycled aggregate. Maximum aggregate parti...

To control pores in the backfill, air-entraining agents (AEAs) are used as an admixture to realize pore structure changes under artificial action and explore effect of on strength. Two AEAs at different dosages were added backfill. The relationship was then analyzed between them from macro- mesoscopic aspects. results indicate that AEA can regulate AEACPB. With increase content, total volume si...

Freeze–thaw resistance is a significant issue in the durability of concrete; however, it not widely discussed context limestone addition to concrete. The present study aims compare effect different types powder on frost ordinary and self-compacting Three were added concrete an amount 15% 30% cement weight. Compositions with without air-entraining admixture prepared each instance. Research inclu...

The subject of the investigation was the influence of pre-wetted lightweight aggregate on damage of the concrete surface due to cyclic freezing and thawing in the presence of de-icing salts tested according to the Swedish Standard SS 13 72 44 (the Borås method). Six series of concrete specimens were made with the same water/binder (w/b) ratio 0.32, cement volume 400 kg/m and content of superpla...

Rheoplastic lightweight concrete (RLC) is generally designed for pumping applications as fluid free from segregation. Concrete produced using polymeric admixtures to enhance workability, strength, drying shrinkage, and durability. This research investigated the suitability of natural porous pumice aggregates in Turkey obtain rheoplastic with cement content normal ranges. To produce experience m...