公路交通技术
公路交通技術
공로교통기술
Technology of Highway and Transport
2015年
5期
1-5
,共5页
复合式路面%露石技术%露石高度%影响因素%界面强度
複閤式路麵%露石技術%露石高度%影響因素%界麵彊度
복합식로면%로석기술%로석고도%영향인소%계면강도
composite pavement%techniques for exposed aggregates%height of exposed aggregates%influence factor%interface strength
露石处理是一种效果良好的新建 CC +AC 复合式路面结构刚柔界面的处理方式。通过室内试验,研究露石剂喷洒量、喷洒时间、冲洗时间及混凝土级配等对露石高度的影响。采用室内拉拔和剪切试验对经过露石处理的刚柔界面强度进行验证。结果表明:1)从露石效果考虑,建议露石剂喷洒量在0.25~0.3 kg/m2左右为宜;2)喷洒时间应参考环境温度确定,当环境温度在25℃以下时,喷洒时间在40~60 min;环境温度在25~35℃时,喷洒时间在10~40 min;环境温度在5~40℃时,冲洗时间为10~33 h 不等,且温度越高,冲洗时间越短;3)级配较粗的混凝土,其露石处理的界面粗糙程度更好,露石高度较大;与未处理相比,经过露石处理的刚柔复合界面破坏主要发生在混凝土内部,层间粘结强度和抗剪强度均得到很大提升。
露石處理是一種效果良好的新建 CC +AC 複閤式路麵結構剛柔界麵的處理方式。通過室內試驗,研究露石劑噴灑量、噴灑時間、遲洗時間及混凝土級配等對露石高度的影響。採用室內拉拔和剪切試驗對經過露石處理的剛柔界麵彊度進行驗證。結果錶明:1)從露石效果攷慮,建議露石劑噴灑量在0.25~0.3 kg/m2左右為宜;2)噴灑時間應參攷環境溫度確定,噹環境溫度在25℃以下時,噴灑時間在40~60 min;環境溫度在25~35℃時,噴灑時間在10~40 min;環境溫度在5~40℃時,遲洗時間為10~33 h 不等,且溫度越高,遲洗時間越短;3)級配較粗的混凝土,其露石處理的界麵粗糙程度更好,露石高度較大;與未處理相比,經過露石處理的剛柔複閤界麵破壞主要髮生在混凝土內部,層間粘結彊度和抗剪彊度均得到很大提升。
로석처리시일충효과량호적신건 CC +AC 복합식로면결구강유계면적처리방식。통과실내시험,연구로석제분쇄량、분쇄시간、충세시간급혼응토급배등대로석고도적영향。채용실내랍발화전절시험대경과로석처리적강유계면강도진행험증。결과표명:1)종로석효과고필,건의로석제분쇄량재0.25~0.3 kg/m2좌우위의;2)분쇄시간응삼고배경온도학정,당배경온도재25℃이하시,분쇄시간재40~60 min;배경온도재25~35℃시,분쇄시간재10~40 min;배경온도재5~40℃시,충세시간위10~33 h 불등,차온도월고,충세시간월단;3)급배교조적혼응토,기로석처리적계면조조정도경호,로석고도교대;여미처리상비,경과로석처리적강유복합계면파배주요발생재혼응토내부,층간점결강도화항전강도균득도흔대제승。
Treatment of exposed aggregates is a method for processing rigid -flexible interface of new CC+AC composite pavement structure with good effect.Based on indoor test,this paper studies influences of spray amount,spray time,washing time of exposed aggregate agent and concrete grading,etc.on the height of exposed aggregates.The paper validates the strength of rigid -flexible interface after treatment of exposed aggregates by means of indoor pull and shear tests.The results show that 1)The spray amount of exposed aggregate agent is recommended at approximate 0.25 ~0.3 kg/m2 in consideration of the effect exposed effect;2)The spray time shall be determined by referring to ambient temperature,when ambient temperature is below 25 ℃,the spray time is 40 ~60 min;when ambient temperature is at 25 ~35 ℃, the spray time is 10 ~40 min;when ambient temperature is 5 ~40 ℃,the washing time is 10 ~33 h, etc.,and the higher the temperature,the shorter the washing time;and 3)For coarse grading concrete, the interface roughness of treatment of exposed aggregates is better,and the exposed aggregates are higher;in comparison with the exposed aggregates without treatment,damages to rigid -flexible composite interface after treatment of expose aggregates mainly happen inside the concrete,and both inter -layer bonding strength and shear strength are improved greatly.