盐冻环境下橡胶混凝土路面受风沙冲蚀性能研究
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摘要
为了研究橡胶混凝土路面在盐冻和风沙侵蚀双重因素作用下的耐久性,根据内蒙古西部地区盐渍土和风沙环境特征,配制了复合盐溶液,对橡胶砂浆进行冻融循环作用,并利用模拟风沙环境侵蚀试验系统对盐冻后的橡胶砂浆进行风沙冲蚀试验,应用扫描电子显微镜(SEM)观测橡胶砂浆在盐冻条件下经风沙冲蚀前后的微观形貌。结果表明:当冻融次数大于15次时,橡胶砂浆的质量损失率小于水泥砂浆;随冻融次数的增加,水泥砂浆和橡胶砂浆低角度冲蚀时的冲蚀率先降低后增大,高角度冲蚀时的冲蚀率逐渐增大;相同冻融循环次数后,四种材料的抗风沙冲蚀性能为:80目橡胶砂浆<40目橡胶砂浆<水泥砂浆<10目橡胶砂浆。
In order to study the durability of rubber concrete pavement under the double factors of salt frost and wind blown sand erosion,based on the characteristics of saline soil and sand environment in Western Inner Mongolia,a composite salt solution is prepared to perform the freeze-thaw cycling action of the rubber mortar.The sand erosion test of the rubber mortar after salt freezing was carried out by simulating the experiment system of wind sand environment erosion,Scanning electron microscope(SEM)was used to observe the morphology of rubber mortar before and after sand erosion under salt frost condition.The results show that when the number of freeze-thaw cycles is more than 15 times,the mass loss rate of rubber mortar is less than cement mortar.With the increase of freeze-thaw cycles,the erosion of cement mortar and rubber mortar at low angle erosion firstly decreased and then increased,and the erosion rate at high angle erosion gradually increased.After the same freeze-thaw cycles,The wind erosion resistance of the four materials is:80 mesh rubber mortar<40 mesh rubber mortar
In order to study the durability of rubber concrete pavement under the double factors of salt frost and wind blown sand erosion,based on the characteristics of saline soil and sand environment in Western Inner Mongolia,a composite salt solution is prepared to perform the freeze-thaw cycling action of the rubber mortar.The sand erosion test of the rubber mortar after salt freezing was carried out by simulating the experiment system of wind sand environment erosion,Scanning electron microscope(SEM)was used to observe the morphology of rubber mortar before and after sand erosion under salt frost condition.The results show that when the number of freeze-thaw cycles is more than 15 times,the mass loss rate of rubber mortar is less than cement mortar.With the increase of freeze-thaw cycles,the erosion of cement mortar and rubber mortar at low angle erosion firstly decreased and then increased,and the erosion rate at high angle erosion gradually increased.After the same freeze-thaw cycles,The wind erosion resistance of the four materials is:80 mesh rubber mortar<40 mesh rubber mortar
引文
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[10]康玲,孙鑫,侯婷,等.内蒙古地区沙尘暴的分布特征[J].中国沙漠,2010,30(2):176-185.
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