摘要
传统的普通道面混凝土由于自身的抗裂能力较差,施工中即使采取相关措施也很难防止裂缝的出现。试验结合上海浦东国际机场的具体情况,分别在普通水泥混凝土道面中掺加钢纤维、膨胀剂、粉煤灰、改性聚丙烯纤维等材料,进行抗裂性能对比试验。结果表明:在普通道面混凝土中单掺钢纤维或膨胀剂对改善混凝土道面的抗裂性能效果不明显;在普通道面混凝土中单掺粉煤灰或聚丙烯纤维,能提高混凝土的抗裂性,而粉煤灰和聚丙烯纤维双掺的新型道面混凝土更能有效防止裂缝的发生,显著延长道面使用寿命。
In view of the phenomenon that the common pavement concrete is prone to crack upon its construction, analyses are made of the causes for such cracking, a new type of pavement concrete is developed by mixing the common concrete with fly ash and polyp ropylene fiber, and a testwith p late specimen is adop ted to fulfill the comparative test of crack-p roofp roperties.The results of the test suggest that the common con_ crete,ifmixed in proportion with either fly ash or polyp ropylene fiber,can imp rove its crack-p roof property but the new-type concrete,mixed in proportion with both fly ash and polyp ropylene fiber at the same time,can more effectively prevent itself from cracking,thereby greatly p rolonging the service life of the pavement.
出处
《混凝土》
CAS
CSCD
北大核心
2008年第6期55-57,共3页
Concrete
关键词
机场道面
新型混凝土
抗裂性
平板试验
airfield pavement
new-type concrete
crack-p roof p roperty
test with plate specimen
