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玉致律(Chi-Youl Ok),金宗周(Joug-Ju Kim),玉致南(Chi-Nam Ok) 한국해양공학회 1990 韓國海洋工學會誌 Vol.4 No.1
We experimented the physical property of the porous concrete by changing the water cement ratio, when the aggregate ratios are 1 : 5 and 1 : 7 separately.<br/> And then we received the results as follows.<br/> The bigger, the coarse grading of the porous concrete is, the more sensitive to the water cement ratio, the porous concrete becomes.<br/> And if we think over its compressive strength, the coarse aggregate which has 5~15㎜ width is most appropriate.<br/> So we concluded that when its compressive strength, permeability coefficient and its unit weight are 50㎏/㎠ 3㎝/sec and 1900㎏/㎥ respectively, the water cement ratio which has 35~37% width is most appropriate, too.<br/> And its compressive strength and unit weitht show that they are about a quarter and three quarters respectively about the conventional concrete.