提高二灰砂砾基层早期强度的方法研究

Research on Methods of Enhancing the Early Strength of Lime Flyash Gravel—Sand Mixture

为了提高二灰砂砾基层早期强度,提出在二灰砂砾混合料中加入早强剂,通过室内试验和试验路的调查,对比分析了不同添加剂及剂量对二灰砂砾早期强度的影响。虽然用化学外掺剂提高二灰砂砾的早期强度效果较明显,但由于价格高,会较大地增加工程造价,而用水泥提高二灰砂砾早期强度具有施工方便,材料来源丰富,增加工程费用少,较低气温下提高早强效果亦很明显的特点,因此水泥是提高二灰砂砾早期强度的最好外掺剂。

The paper mainly discussed the methods of enhancing the early strength of lime flyash gravel - sand base course,proposed using cement and the chemical additive to enhance the early strength of lime flyash gravel- sand mixture. Through the room experiments testing results and the road the investigation, found that using cement and the chemical additive can enhance the early strength of lime flyash gravel-sand mixture. Though the chemical additive enhance the early strength influence is more obviously than cement,it is dear. So we get the conclusion that the cement is the best additive in enhancing the early strength of lime flyash gravel-sand mixture.