Effect of bamboo leaf ash on cement stabilization of Makurdi shale for use as flexible pavement construction material
Effect of bamboo leaf ash on cement stabilization of Makurdi shale for use as flexible pavement construction material
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DOI：
10.5251/ajsir.2012.3.3.166.174
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发表时间：
2012-06
期刊：
影响因子：
--
通讯作者：
A. Iorliam;I. Agbede
中科院分区：
文献类型：
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作者：
A. Iorliam;I. Agbede
研究了竹叶灰对马库尔迪页岩水泥稳定性能的影响。对水泥和BLA处理的马库尔迪页岩土样进行了分级、压实、稠度、加州承载比（CBR）和无侧限抗压强度（UCS）试验，水泥和BLA的组合增量顺序分别为土样干重的2%至14%和4%至20%。试验结果表明，马库尔迪页岩可分别按AASHTO、USCS和NBRRI分类系统归类为A-7-6、CH和高膨胀势土。塑性指数（PI）从未处理的马库尔迪页岩的39.4%降低到14%水泥+20%BLA的4.7%。未处理页岩的最大干密度（MDD）在0%BLA +14%水泥时从1.49Mg/m3增加到峰值1.80Mg/m3。当水泥用量为14%+ BLA用量为20%时，页岩的最佳含水率由14.5%提高到33.1%.在14%水泥+20%BLA条件下获得的最大浸泡CBR和7天UCS值分别为80%和1783.9 kN/m2。根据不同试验结果，推荐使用经14%水泥+20%BLA处理的马库尔迪页岩作为柔性路面底基层材料。
A study was carried out on the cement stabilization of Makurdi shale treated with bamboo leaf ash (BLA), for use as flexible pavement construction material. Classification, Compaction, Consistency, California Bearing Ratio (CBR) and unconfined compressive strength (UCS) tests, were conducted on Makurdi shale specimen treated with Cement and BLA in combined incremental order of 2 % up to 14 % cement, and 4 % up to 20 % BLA of dry weight of soil sample respectively. Results of tests showed that Makurdi shale can be classified as an A-7-6, CH and high swell potential soil by the AASHTO, USCS and NBRRI classification systems respectively. The plasticity index (PI) reduced from 39.4 % for untreated Makurdi shale to 4.7 % at 14 % cement + 20 % BLA. Maximum dry density (MDD) of untreated shale increased from 1.49 Mg/m 3 to a peak value of 1.80 Mg/m 3 at 0 % BLA + 14 % cement. While, the optimum moisture content (OMC) of shale increased from 14.5 % to 33.1 % at 14 % Cement + 20 % BLA. Maximum soaked CBR and 7 day UCS values of 80 % and 1783.9 kN/m2 was obtained at 14 % Cement + 20 % BLA. Based on the results of the different tests, the use of Makurdi shale treated with 14 % cement + 20 % BLA are recommended for use as sub-base materials in flexible pavement.