CO2压力对钢渣碳化的影响研究

The influence of CO2 pressure on manufacturing of building materials by steel slag carbonation

本课题将钢渣、矿渣以及石灰,在固定的水灰比下搅拌均匀,并在10 MPa的压力下压制成型,放入密闭容器中,通入95%的CO2气体但采用不同的CO2压力进行碳化。实验证明,交替的CO2压力下碳化后的钢渣表面生长着大量簇生的碳酸钙晶体,强度大幅度提高,安定性明显改善。因此,与单一的CO2压力相比,使用交替的CO2压力更有利于碳化。

In this study,under fixed water cement ratio,the steel slag,slag and lime was stirred to uniform,and was moulded at the pressure of 10 MPa.Putting this sample into enclosed container,inletting 95%CO2 gas and carbonizing at disparate CO2 pressure.Result shows that:after carbonization,the surface of steel slag has large quantity of fascinated CaCO3 crystal.The sample’s strength is increased largely,and the stability is improved obviously.Therefore,compared to single pressure of CO2 gas,alternate pressure of CO2 gas is propitious to carbonization.