钢渣-复掺纳米SiO2混凝土力学性能试验研究

关键字：钢渣,纳米SiO2,抗压强度,劈裂抗拉强度

（河南质量工程职业学院，河南 平顶山  467000）

    摘要：钢渣复掺纳米SiO2混凝土是一种新型环保型建筑材料，通过对加入不同钢渣掺量以及不同类型纳米SiO2的混凝土抗压强度以及劈裂抗拉强度的研究，得出了钢渣复掺纳米SiO2混凝土的力学性能的变化规律。试验结果表明：钢渣混凝土在钢渣掺量为20%时，其28 d抗压强度和劈裂抗拉强度达到最大值，分别是38.4 MPa和2.54 MPa；纳米SiO2的加入能够有效提升钢渣混凝土的抗压强度和劈裂抗拉强度；3种纳米SiO2对钢渣混凝土强度的提升作用由大到小顺序依次是：SP15＞SP30＞SP50；选用SP15型或SP30型纳米SiO2时，钢渣复掺纳米SiO2混凝土的抗压强度和劈裂抗拉强度在钢渣掺量为30%时达到最大值。
    关键词：钢渣；纳米SiO2；抗压强度；劈裂抗拉强度
    中图分类号：TU528         文献标志码：A         文章编号：1001-702X（2017）06-0016-04
 

Experimental study on mechanical properties of steel slag concrete with nano SiO2
CUI Yanyan，SHEN Chunmei
（College of Henan Quality Project，Pingdingshan 467000，China）

    Abstract：Steel slag concrete with nano-SiO2 is a new environment-friendly building materials，compressive strength and splitting tensile strength of concrete were studied based on different content of steel slag and different type of nano SiO2. The change rule of mechanical properties of steel slag concrete with nano SiO2 was achieved. The test results show that the 28 d compressive strength and splitting tensile strength of steel slag concrete reaches the maximum value with 20% dosage of steel slag，which were 38.4 MPa and 2.54 MPa；the nano SiO2 could effectively improve the steel slag concrete compressive strength and splitting tensile strength;according to the ability of improving the strength of concrete，the order of three kinds of nano SiO2 from large to small in turn is：SP15>SP30>SP50；the compressive strength and splitting tensile strength of steel slag concrete with nano-SiO2 reached the maximum with 30% dosage of steel slag.
    Key words：steel slag，nano SiO2，compressive strength，splitting tensile strength