Title: Mechanical and Durability Properties of Coral Aggregate Concrete
Author(s): Wen Zhou, Yongxiang Zhou, Peng Feng, Zuqi Wang, Jing Wang, and Putao Song
Publication: Symposium Paper
Appears on pages(s): 175-188
Keywords: coral concrete; mixture proportion design; mechanical property; durability
Preparing concrete with coral gravel and coral sand as aggregates is of great significance for the construction of offshore islands short of building materials. LC30 and LC50 coral aggregate concrete (CAC) using aggregate from South China Sea were prepared and basic properties of CAC were studied and compared with ordinary concrete (OC) and lightweight aggregate concrete (LAC). The results show that prewetting aggregates improves the compressive strength of CAC with low water-cement ratio (w/c). With the same level of cube compressive strength (fcu), the compressive strength (fc) of CAC is higher than that of OC and LAC, the splitting tensile strength (fsp) of CAC is close to that of OC and higher than that of LAC, the elastic modulus (Ec) of CAC is between that of OC and LAC. Test results on durability properties show that 3-day shrinkage of CAC is 43% of OC; and CAC’s ability to resist chloride diffusion is inferior to OC but better than LAC.