级配钢渣用于高速公路路床的可行性研究

发布时间：2018-01-18 03:07

本文关键词：级配钢渣用于高速公路路床的可行性研究　出处：《公路》2017年04期 　论文类型：期刊论文

【摘要】：钢渣作为炼钢副产品,是一种潜在的优质筑路材料。以舞钢电炉钢渣为研究对象,在系统分析其稳定性的基础上,对不同陈化龄期、不同压实度、不同级配钢渣进行加州承载比(CBR)与无侧限抗压强度测试,分析其用于高速公路路床铺筑的可行性。结果表明,无论是f-CaO含量、粉化率还是CBR浸水膨胀率,舞钢钢渣均满足规范的相关要求,具备较好的稳定性能与工程应用的可行性。陈化龄期为0个月和8个月、不同配合比钢渣在92%、96%和100%压实度下,CBR值均远大于规范对路床材料CBR值8%的要求。陈化龄期8个月钢渣配合比为3(0~0.6mm)∶7(0.6~4.75mm)与5∶5时,其7d无侧限抗压强度与4%石灰土基本相同,可以代替石灰土应用于高速公路路床。以高速公路路床采用4%石灰土的强度性能为对比,综合考虑钢渣稳定性与工程施工成本,建议选用陈化龄期为8个月、配合比为3∶7的钢渣。最后,对钢渣强度形成机理进行了分析。
[Abstract]:Steel slag, as a by-product of steelmaking, is a potential high quality road building material. Based on the systematic analysis of its stability, the steel slag of Wugang electric furnace is studied in different aging ages and compaction degrees. The California bearing ratio (CBR) and unconfined compressive strength of steel slag with different gradation were tested and the feasibility of using it in highway pavement was analyzed. The results showed that the content of f-CaO was no matter the content of f-CaO. The pulverization rate is still the CBR soaking expansion rate, the steel slag of Wugang meets the relevant requirements of the code, and has good stability performance and the feasibility of engineering application. The aging age is 0 and 8 months. The steel slag with different mix ratio is at 92U 96% and 100% compaction. The CBR value is much higher than the CBR value 8% required by the code. The mixture ratio of steel slag in 8 months of aging period is 3 0 0 0 mm / 7 0 0. 6 mm / 4. 75 mm) and 5: 5. The unconfined compressive strength of 7 days is basically the same as that of 4% lime soil, which can replace lime soil in expressway road bed, and the strength performance of 4% lime soil used in expressway road bed is compared. Considering the stability of steel slag and the construction cost, it is suggested that the steel slag with aging age of 8 months and mix ratio of 3: 7 should be selected. Finally, the forming mechanism of the strength of steel slag is analyzed.
【作者单位】：中原工学院建筑工程学院;郑州大学水利与环境学院;
【基金】：河南省高等学校重点科研项目,项目编号15A560013
【分类号】：U416.4
【正文快照】： 钢渣是生产钢铁过程的副产品,每生产1t钢铁,产生约150~200kg炉渣[1]。我国每年产生上千万吨钢渣,但综合利用率不足20%[2]。大量钢渣堆积占用耕地,污染环境,造成资源的浪费,同时也不利于钢铁企业的可持续发展,对钢渣的综合利用研究刻不容缓。目前,我国高速公路建设蓬勃发展,对

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