珊瑚砂水下不分散混凝土性能试验研究

研究了水泥用量、絮凝剂掺量、砂率对海水拌和珊瑚砂水下不分散混凝土性能的影响。结果表明:珊瑚砂水下不分散混凝土单位用水量为235~283 kg/m^3时,砂率对单位用水量的影响最为显著,用水量随砂率增加而增大;水泥用量为400~490 kg/m^3时,28 d抗压强度在26~39 MPa之间,可配制C20~C30水下不分散混凝土;水泥用量对抗压强度的影响最为显著,强度随水泥用量的增加而增大;水陆强度比随水泥和絮凝剂掺量增加而增大。

Experimental Study on Anti-washout Underwater Concrete with Coral Sand

The effects of cement dosage,anti-washout admixture dosage and sand rate on the performance of underwater sand-dispersed concrete with coral sand were studied.The results show when the water consumption of the anti-washout concrete is between 235~283 kg/m^3,the sand rate has the most significant effect on the unit water consumption.With the water consumption increasing,the sand rate increases significantly.When the cement dosage is 400~490 kg/m^3,the 28 d compressive strength of underwater concrete is between 26~39 MPa,and C20~C30 anti-washout concrete can be prepared.The amount of cement is the most significant in compressive strength,and the strength increases with increasing amount of cement.At the same time,the underwater/in-air strength ratio increases as the amount of cement and anti-washout admixture increases.