用于北方满族民居墙体的再生混凝土性能研究

通过试验研究了再生混凝土作为北方满族民居建造材料的可行性。研究重点:再生骨料的物理性质测定、再生混凝土基本力学性能试验,以及粉煤灰、聚丙烯纤维以及附加水对其力学性能的影响。通过试验得到,再生混凝土立方体抗压强度最高应力达37.1 MPa、轴心抗压强度平均应力28.4 MPa、静力受压弹性模量平均应力22 300 MPa、抗折强度平均应力3.8 MPa、劈裂抗拉强度平均应力1.68 MPa。结果表明:在再生混凝土中加入粉煤灰和聚丙烯纤维都对立方体抗压强度有所提高,但附加水的加入对立方体抗压强度产生了降低作用。整体来说,再生混凝土各方面的力学指标都能满足一定的强度要求。因此可以作为北方满族民居的建设材料。

Research on Properties of Recycled Concrete for the Wall of Manchu Houses in the North

The feasibility of using recycled concrete as the construction material for northern Manchu houses was studied by the experiments.This study focused on determination of physical properties of recycled aggregate,recycled concrete basic mechanical properties,as well as impact of fly ash,additional water and fiber polypropylene on mechanical properties.The experiment results show that the highest compressive strength of recycled concrete cube is 37.1 MPa,the average axial compressive stress is 28.4 MPa,the mean stress of static compression modulus of elasticity is 22 300 MPa,flexural strength mean stress is 3.8 MPa,the average stress of splitting tensile strength is 1.68MPa.Adding fly ash and polypropylene fibers can improve recycled concrete cube compressive strength,but adding additional water can decrease the compressive strength.In general,mechanical indexes of all aspects of recycled concrete can meet certain strength requirements.Therefore,it can be used as building materials for northern Manchu houses.