Use of Alaçatı Stone Aggregate in Conventional and Self-Consolidating Concretes

Alaçatı stone or Alapietra stone is widely used mostly for building cladding. However, its production and use in the construction sites generate high amounts of waste (debris), causing environmental pollution in Çeşme which is a touristic district. This study investigated the reuse of Alaçatı stone as lightweight aggregate (LWA) in both conventional and self-consolidating concrete (SCC) mixtures. The concretes were prepared to have three different water-to-cement ratios (w/c), which were 0.38, 0.42 and 0.48. For each w/c, a conventional concrete mixture and two SCC mixtures with 60 or 70 cm slump flow were produced by varying the superplasticizer SP content. Slump, slump flow, T50, V-funnel, sieve segregation, dry density and compressive strength tests were performed. The results demonstrated that it was possible to use Alaçatı stone aggregate in producing lightweight concretes with good performance in both fresh and hardened states.