Preparation and compressive strength calculation of steel slag fine aggregate foam concrete
In order to realize the resource utilization of steel slag,steel slag foam concrete(SSFC)test blocks were prepared by using steel slag as fine aggregate,using different steel slag particle size,steel slag replacement amount and water binder ratio.Through 7 d unconfined compressive strength,the optimal mix proportion was determined as follows:1.18 mm steel slag particle size,20%(mass ratio with cement,the same below)steel slag replacement amount and 0.45 water binder ratio.Based on the fractal theory,the relationship between the compressive strength and porosity of SSFC under the optimal mix proportion is established.The fractal dimension D of the sample can be calculated by the box counting method.The predicted compressive strength of the fractal model is in good agreement with the experimental value.By comparing the experimental values of the compressive strength of foam concrete(FC)in other literatures,it is also proved that the fractal calculation model can accurately predict the compressive strength of FC and has a good application prospect.
steel slagfoam concretecompressive strengthporositybox counting methodfractal theory
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