Atýk kauçuk agrega kullanýlarak üretilen hafif çimento baðlayýcýlý kompozitlerin yüksek sýcaklýk performanslarý

Bu çalýþmada perlit (Pe), pomza (Pu) ve atýk kauçuk agregalarý (R) kullanýlarak üretilen hafif betonlarýn performanslarý incelenmiþtir. Hafif betonun basýnç dayanýmýndaki deðiþimler incelenirken, yüksek sýcaklýða (300, 500 ℃) maruz kaldýktan sonra ultrasonik ses geçiþ hýzý ve yoðunluk özellikleri karþýlaþtýrýlmýþtýr. Bu kapsamda 11 farklý karýþým üretilmiþtir. Kombinasyonlar s/ç oraný sabit tutularak oluþturulmuþtur. Yapýlan deneyler sonucunda genel olarak 300 ℃ sonrasýnda basýnç dayanýmýnda artýþlar tespit edilmiþtir. Atýk kauçuk agrega kullanýlarak üretilen betonlarýn basýnç dayanýmlarý, pomza ve perlit agrega kullanýlarak üretilen betonlara göre daha düþük olmuþtur. Kauçuk atýðý kullanýlarak yapýlan betonun basýnç yüklemesi sýrasýnda daha sünek kýrýlma gösterdiði belirlenmiþtir.

Elevated temperature performances of light-weight cementitious composites produced with waste rubber aggregate

In this study, lightweight concrete was investigated by using perlite(Pe), pumice(Pu), and waste rubber aggregates (R). The changes in compressive strength of lightweight concrete were investigated, while ultrasonic pulse velocity and density properties were compared after high-temperature exposure (300, 500 ℃). In this context, 11 different types of mixtures were produced. Combinations were formed by keeping the w/c ratio constant. As a result of the experiments, increases in compressive strength were determined at 300 ℃ in general. The compressive strengths of concretes produced using waste rubber aggregates were lower than concretes using pumice and perlite aggregates. It was determined that concrete made using waste rubber exhibited more ductile fracture during compression loading.