| 摘要: |
| 用不同质量分数甲基硅酸钾溶液（PM）、硅丙乳液（SAE）对钢渣进行预浸改性处理，探究改性剂对钢渣物理力学性能的增强效果，研究不同替代方式下水泥稳定碎石钢渣混合料力学性能的变化规律.结果表明：预浸改性处理可以提高钢渣的体积稳定性；改性钢渣全部替代天然集料后，混合料抗压强度下降，不宜采用全部替代的方式；部分替代方式下，3%PM改性钢渣混合料力学性能优于12%SAE改性钢渣混合料，4.75~9.50 mm的PM改性钢渣混合料表现出较好的力学性能.建议采用4.75~9.50 mm的PM改性钢渣部分替代天然集料的方式制备改性钢渣混合料. |
| 关键词: 钢渣 表面改性 改性钢渣 替代方式 力学性能 |
| DOI：10.3969/j.issn.1007-9629.2022.10.015 |
| 分类号:U414 |
| 基金项目:国家自然科学基金资助项目（51508150）； “十三五”国家重点研发计划项目（2018YFF0300200）； 河北省自然科学基金资助项目（E2018402206） ；河北省教育厅青年拔尖人才计划资助项目（BJ2017034）；河北省教育厅青年基金资助项目（QN2019108） |
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| Mechanical Properties of Polymer Prepreg Modified Steel Slag and Its Mixture |
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GAO Ying, WANG Weihe, LI Yancang, CHEN Meng, JI Zhipeng
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School of Civil Engineering， Hebei University of Engineering， Handan 056107， China
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| Abstract: |
| Steel slag was pretreated with different mass fractions of potassium methylsilicate （PM） and silicon acrylic lotion （SAE） to explore the enhancement effect of different modifiers on the physical and mechanical properties of steel slag. The change rule of mechanical properties of cement stabilized crushed stone steel slag mixture under different substitution was studied. The results show that the volume stability of steel slag can be improved by prepreg modification. After the modified steel slag completely replaces the natural aggregate， the compressive strength of the mixture decreases， so it is not suitable to use the method of full replacement. Under the partial substitution， the mechanical properties of 3% PM modified steel slag mixture are better than that of 12% SAE modified steel slag mixture. The PM modified steel slag mixture with particle size fom 4.75 mm to 9.50 mm shows excellent mechanical properties. It is suggested to use PM modified steel slag with particle size from 4.75 mm to 9.50 mm to prepare modified steel slag mixture with the method of partially replacing the natural aggregate. |
| Key words: steel slag surface modification modified steel slag alternative method mechanical property |
