Kuo Wen-Ten, Gao Yi-Syuan, Juang Chuen-Ul
Department of Civil Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 807, Taiwan.
Materials (Basel). 2019 Jul 10;12(14):2214. doi: 10.3390/ma12142214.
In this study, environmentally friendly ground granulated blast furnace slag (GGBFS) based alkali activated materials and basic oxygen furnace slags (BOFs) were used as bonding materials and aggregates, respectively, to produce novel, environmentally friendly GGBFS based porous concrete. Porous concrete with a particle size of 4.75-9.5 mm and 9.5-19.00 mm was used as an aggregate. The "liquid-to-solid ratios" (L/S) variable was set at set at 0.5 and 0.6, and the "percentage of pore filling paste ratio" variable was controlled at 40%, 50%, and 60%. The curing period was set at 28 d, and the relationship between connected porosity and permeability, as well as that between unit weight and the pore filling paste ratio percentage were explored using analysis of variance. The results showed that the porous concrete had a maximum compressive strength of 8.31 MPa. The following results were obtained. An increase in percentage of pore filling paste ratio increased compressive strength. Permeability was measured at 4.67 cm/s and was positively correlated with porosity. An increase in porosity increased permeability, in which porosity was positively correlated with the percentage of pore filling paste ratio. The maximum splitting strength achieved during the 28 d was 1.46 MPa, showing a trend similar to that of compressive strength.
在本研究中，分别使用环境友好型的磨细粒化高炉矿渣（GGBFS）基碱激发材料和碱性氧气转炉炉渣（BOFs）作为胶凝材料和骨料，以生产新型的、环境友好型的GGBFS基多孔混凝土。粒径为4.75 - 9.5mm和9.5 - 19.00mm的多孔混凝土用作骨料。“液固比”（L/S）变量设定为0.5和0.6，“孔隙填充浆体比例”变量控制在40%、50%和60%。养护期设定为28天，并通过方差分析探究连通孔隙率与渗透率之间的关系，以及单位重量与孔隙填充浆体比例之间的关系。结果表明，该多孔混凝土的最大抗压强度为8.31MPa。得到了以下结果。孔隙填充浆体比例的增加会提高抗压强度。测得的渗透率为4.67cm/s，且与孔隙率呈正相关。孔隙率的增加会提高渗透率，其中孔隙率与孔隙填充浆体比例呈正相关。28天内达到的最大劈裂强度为1.46MPa，呈现出与抗压强度相似的趋势。
