磨细钢渣对混凝土力学性能和耐久性影响的研究

Effect of Steel Slag on the Mechanical Properties and Durability of Concrete

基于钢渣的活性效应和微集料效应研究了不同掺量钢渣对混凝土抗压强度和抗折强度的影响,通过加速碳化试验和抗冻性试验探究了钢渣混凝土的抗碳化性能和抗冻性。采用X-CT技术探究了钢渣混凝土内部的孔结构。结果表明:掺加10%钢渣混凝土的抗压强度和抗折强度最大,掺加30%钢渣混凝土的抗压强度和抗折强度最小。当碳化到56 d时,掺加30%钢渣的混凝土的碳化深度已达12.5 mm;冻融循环到180 d,掺加30%钢渣混凝土的相对动弹性模量降至88.7%。

The effect of different content of steel slag on the compressive strength and flexural strength of concrete was studied based on the micro aggregate and active effect of steel slag. The carburization resistance and freeze-thaw resistance of steel slag concrete were investigated by carbonization test and frost resistance test. The pore structure of steel slag concrete was investigated by X-CT. The results show that the compressive strength and flexural strength of concrete with content 10% steel slag is the highest, and the compressive strength and flexural strength of content 30% steel slag is the least. The carbonation depth of concrete with 30% steel slag has reached 12.5 mm when carbonized to 56 d. The relative dynamic elastic modulus of concrete with content 30% steel slag is reduced to 88.7% after 180 d of freeze-thaw cycles.