盐渍土环境下高吸水树脂混凝土抗压强度及氯离子渗透研究  

Compressive strength and chloride penetration of SAP concrete in saline soil environment

作　　者：陈鹏[1] 金祖权[1] 李建强[1] 陈永丰[1] 

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033

出　　处：《海洋工程》2017年第2期50-55,共6页The Ocean Engineering

基　　金：国家自然科学基金资助项目(51378269;51420105015);铁道部科研计划资助项目(2014G004-F)

摘　　要：标准养护和夏季自然养护的内养护混凝土在盐渍土环境中腐蚀不同龄期,测试其抗压强度及氯离子渗透性能。结果表明:无论标准养护还是自然养护,高吸水树脂的掺加均降低了混凝土早期强度,但当高吸水树脂掺量为1kg/m3时可提高混凝土后期强度,且提升幅度对低水胶比混凝土更明显。在盐渍土腐蚀环境中,普通混凝土强度先上升后下降,而内养护混凝土强度先下降后上升。高吸水树脂能够延缓混凝土抗压强度下降的速率,提升混凝土抗氯离子渗透能力。The compressive strength and chloride ion penetration of concrete exposed to saline soil for different corrosion age were tested. The inner curing concrete was prepared with super absorbent polymer （SAP） and cured in standard condition and summer natural environment. Experimental results show that the early strength of inner curing concrete decreases whether in standard curing or in natural curing environment. However, the compressive strength of concrete incorporating with lkg/m3 SAP increases in the later curing age, and the improving influence of SAP on compressive strength of concrete in later age is more remarkable for low water-binder ratio concrete than high water-binder ratio concrete. In saline soil environment, the compressive strength of plain concrete appears a trend of rise first then fall. However, the compressive strength of concrete incorporated with SAP decreases firstly, and then increases with corrosion age. The time of compressive strength decline point of concrete in saline soil was delayed, and the chloride penetration resistance capacity of inner curing concrete is improved due to the addition of SAP.

关 键 词：高吸水树脂 内养护混凝土 抗压强度 盐渍土 氯离子渗透 

分 类 号：TU528[建筑科学—建筑技术科学]