首页|掺沥青路面回收料再生水泥混凝土抗冻性能研究

掺沥青路面回收料再生水泥混凝土抗冻性能研究

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为研究掺沥青路面回收料(RAP)再生水泥混凝土的抗冻性能,采用慢冻法研究了冻融循环下RAP掺量(20%、30%、40%、50%)和水灰比(0.4、0.5、0.6、0.7)对再生水泥混凝土外观形貌和抗压强度损失率的影响.结果表明:在冻融循环下,掺沥青路面回收料再生水泥混凝土外观形貌表现出表面裂缝出现-裂缝延伸扩展-裂缝遍布表面-表面浆体胀落-试件彻底解体等发展历程.冻融早期再生水泥混凝土的抗压强度损失较为缓慢,随着冻融次数的不断增加,再生水泥混凝土的强度损失速度也随之加快.随着RAP掺量和水灰比增大,再生水泥混凝土抗压强度损失率随之增大,冻胀解体时承受的循环次数随之减小,抗冻性能随之减弱.
Research on Freeze-thaw Performance of Recycled Cement Concrete with Reclaimed Asphalt Pavement
In order to study the freeze-thaw performance of recycled cement concrete with reclaimed asphalt pavement(RAP-RCC),the freeze-thaw cycle test of RAP-RCC is carried out by slow freezing method.The effects of RAP content(20%,30%,40%,and 50%)and water-cement ratio(0.4,0.5,0.6,and 0.7)on the appearance and compressive strength loss rate of RAP-RCC are studied.The results show that under the condition of freeze-thaw cycle,cracks first appear on the surface of RAP-RCC,then the cracks extend and expand until they spread throughout the entire surface,and then the surface slurry begins to swell until the specimen is completely disintegrated.The strength loss of RAP-RCC is slow in the early stage of freeze-thaw,and the strength loss rate of RAP-RCC increases with the increase of freeze-thaw cycles.With the increase of RAP content and water-cement ratio,the compressive strength loss rate of RAP-RCC increases,the number of freeze-thaw cycles that RAP-RCC can withstand before disintegration decreases,and the freeze-resistance performance weakens.

road engineeringrecycled cement concretefreeze-thaw cycleRAP contentwater-cement ratiocompressive strength loss rate

边伟、高晋彪、张艳聪、贾嘉豪、黄斐

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山西省交通科技研发有限公司 太原市 030032

黄土地区公路建设与养护技术交通行业重点实验室 太原市 030032

山西大成高速公路有限公司 忻州市 034209

道路工程 再生水泥混凝土 冻融循环 沥青路面回收料掺量 水灰比 抗压强度损失率

山西省基础研究计划项目山西省交通运输厅科技项目山西省交通运输厅科技项目山西交通控股集团有限公司科技项目山西交通科学研究院集团有限公司创新发展计划项目

202103021244572020-1-82020-1-920-JKKJ-5321-JKCF-54

2024

公路
中国交通建设集团有限公司

公路

CSTPCD北大核心
影响因子:0.54
ISSN:0451-0712
年,卷(期):2024.69(1)
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