摘要
基于材料的化学反应机理和孔隙结构特点探讨模拟酸雨侵蚀下透水混凝土质量、透水性能和抗压强度的变化情况。研究结果表明:在模拟酸雨侵蚀样品14个周期的过程中,质量前期和末期损失较缓,中期损失最快;透水性能在前4个周期略有所下降,随后一直增大;抗压强度前期变化缓慢,后期损失较大。配合比对其性能的变化有一定影响,骨料粒径越大,水泥石包裹骨料越薄,质量和抗压强度总损失率越大,但在包裹厚度为0.6mm时质量总损失率有所下降;骨料粒径越小,水泥石包裹越厚,透水系数的最终增加率越大。
Reaction theory and hallmark of pore frame are used to analyze the change of quality,permeability and compressive strength on simulated acid rain attacking pervious concrete.The results indicate that,under the simulated acid rain attacking for 14 cycles condition, quality loss is slowly down in the earlier period and the later period ,but it＇s quickly down in the intermediate period;permeability can be slowly down in the ear- ly 4 cycles, but later, it will enhance as time goes by; and compressive strength change is slowly down in the earlier period, but quickly down in the later period.Proportion can make a certain affection to its capability, the more aggregate radius and the thinner surrounding thickness of hydrated cement is, the more quality and compressive strength loss ratio is, but the quality loss ratio comes down when the surrounding thickness is 0.6mm; the less aggregate radius and the thicker surrounding thickness of hydrated cement is, the more the permeability coefficient increase ratio is.
出处
《混凝土》
CAS
CSCD
北大核心
2008年第10期27-29,共3页
Concrete
基金
中南大学土木建筑学院材料研究所资助项目
关键词
透水混凝土
酸雨
侵蚀
性能变化
pervious concrete
acid rain
corrosion
capability change
