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

作　　者：宋福春[1] 张连海[2] 段成兵 洪丹丹[2] 

机构地区：[1]福州大学土木工程学院,福州350000 [2]沈阳建筑大学土木工程学院,沈阳110168 [3]大连驰敖公路建设有限公司,大连116000

出　　处：《北方交通》2006年第7期26-28,46,共4页Northern Communications

摘　　要：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.

关 键 词：水泥 石灰 粉煤 灰砂砾 早强 

分 类 号：U414.11[交通运输工程—道路与铁道工程] TU755.8[建筑科学—建筑技术科学]