人工砂用于北方水运工程混凝土的试验与应用

人工砂是由制砂设备筛分制成的粒径小于5 mm的岩石颗粒(但不包括软质岩、风化岩的颗粒),具有质量可控、稳定、颗粒坚硬等特点,经试验能满足北方水运工程混凝土的物理力学性能指标和抗冻融、抗氯离子渗透等耐久性指标的要求,在实际主体工程中应用效果较好。在天然砂日益缺乏及质量严重下滑的状况下,用人工砂取代或部分取代天然砂,可以缓解砂资源缺乏对工程进度、成本及质量的影响。

Experimental study on and application of artificial sand used for marine engineering concrete in Northern China

The artificial sand is rock particles which are less than 5 mm (excluding soft rock and mantle rock particles) manufactured by sand-making equipments.It is characterized by controllable quality,good stability and hardness,and can meet the requirements of physical performance index and durability index such as freeze-thaw resistance and chloride ion permeability for port & waterway engineering concrete adopted in Northern China.In the actual engineering,it shows a satisfactory application effect.Since natural sand is in growing shortage and quality decline,to replace or partly replace the natural sand by the artificial sand can alleviate the adverse impact duo to the lack of sand resource on the engineering schedule,cost,and quality.