华南理工大学学报（自然科学版）
華南理工大學學報（自然科學版）
화남리공대학학보（자연과학판）
Journal of South China University of Technology(Natural Science Edition)
2015年
8期
106-112
,共7页
道路工程%沥青混合料%含盐高湿环境%劈裂试验
道路工程%瀝青混閤料%含鹽高濕環境%劈裂試驗
도로공정%력청혼합료%함염고습배경%벽렬시험
road engineering%asphalt mixtures%salty and humid environment%split test
在纯水、5%和10% NaCl溶液中,采用持续浸泡、干湿循环和冻融循环3种不同方式加速模拟含盐高湿环境对沥青混合料的腐蚀,然后进行劈裂试验,以劈裂强度和氯盐腐蚀因子评价含盐高湿环境作用下沥青混合料性能的劣化情况,并研究了抗剥落剂、纤维、消石灰等对混合料力学性能的改善情况.结果表明:3种不同方式处理后,随着作用次数的增加沥青混合料的空隙率逐渐增大,劈裂强度逐渐减小;在氯盐溶液中干湿循环12次和冻融循环9次后,沥青混合料空隙率和劈裂强度的变化幅度较小;干湿循环方式最能体现氯盐溶液对沥青混合料性能劣化作用,建议在10%NaCl溶液中干湿循环12次来模拟含盐高湿环境的腐蚀作用;玄武岩纤维改善含盐高湿环境下沥青混合料力学性能的效果最好.
在純水、5%和10% NaCl溶液中,採用持續浸泡、榦濕循環和凍融循環3種不同方式加速模擬含鹽高濕環境對瀝青混閤料的腐蝕,然後進行劈裂試驗,以劈裂彊度和氯鹽腐蝕因子評價含鹽高濕環境作用下瀝青混閤料性能的劣化情況,併研究瞭抗剝落劑、纖維、消石灰等對混閤料力學性能的改善情況.結果錶明:3種不同方式處理後,隨著作用次數的增加瀝青混閤料的空隙率逐漸增大,劈裂彊度逐漸減小;在氯鹽溶液中榦濕循環12次和凍融循環9次後,瀝青混閤料空隙率和劈裂彊度的變化幅度較小;榦濕循環方式最能體現氯鹽溶液對瀝青混閤料性能劣化作用,建議在10%NaCl溶液中榦濕循環12次來模擬含鹽高濕環境的腐蝕作用;玄武巖纖維改善含鹽高濕環境下瀝青混閤料力學性能的效果最好.
재순수、5%화10% NaCl용액중,채용지속침포、간습순배화동융순배3충불동방식가속모의함염고습배경대력청혼합료적부식,연후진행벽렬시험,이벽렬강도화록염부식인자평개함염고습배경작용하력청혼합료성능적열화정황,병연구료항박락제、섬유、소석회등대혼합료역학성능적개선정황.결과표명:3충불동방식처리후,수착작용차수적증가력청혼합료적공극솔축점증대,벽렬강도축점감소;재록염용액중간습순배12차화동융순배9차후,력청혼합료공극솔화벽렬강도적변화폭도교소;간습순배방식최능체현록염용액대력청혼합료성능열화작용,건의재10%NaCl용액중간습순배12차래모의함염고습배경적부식작용;현무암섬유개선함염고습배경하력청혼합료역학성능적효과최호.
In pure water as well as 5%and 10%NaCl solutions, three ways of continuous immersion, dry-wet cy-cles and freeze-thaw cycles were adopted to speed up the corrosion of the asphalt mixture in salty and humid envi-ronment.Then, the split test was carried out, and the deterioration of the asphalt mixture performance was evalua-ted by using the splitting strength and the chloride corrosion factor.Moreover, the effects of anti-stripping agent, fi-ber and hydrated lime in improving the mechanical properties of the asphalt mixture were also investigated.The re-sults show that (1) for the asphalt mixture treated in three different ways, with the increase of the action times, the void ratio increases while the splitting strength decreases; (2) after the asphalt mixture experiences twelve dry-wet cycles or nine freeze-thaw cycles in the chloride solution, the ranges of the void ratio and splitting strength changes both become narrow;(3) the way of dry-wet cycles displays the best performance in embodying the negative effect of the salty and humid environment on the asphalt mixture performance, and it is thus suggested that twelve dry-wet cycles in 10%NaCl solution should be used to simulate the corrosive effect of the salty and humid environment;and (4) the Basalt fiber achieves the best effect in improving the mechanical properties of the asphalt mixture in the salty and humid environment.
