纳米SiO_(2)的分散性和掺量对混凝土性能的影响  

Influence of Dispersibility and Content of Nano-SiO_(2)on Concrete Properties

作　　者：陈际洲[1,2] 乔晓立 唐兴滨 赵铁军 王鹏刚[1] 乔允[4] 陈强 谭哲 CHEN Ji-zhou;QIAO Xiao-li;TANG Xing-bin;ZHAO Tie-jun;WANG Peng-gang;QIAO Yun;CHEN Qiang;TAN Zhe(School of Civil Engineering,Qingdao University of Technology,Qingdao 266033,China;Qingdao Municipal Construction Group Co.,Ltd.,Qingdao 266000,China;Qingdao Municipal Group Concrete Industry Engineering Co.,Ltd.,Qingdao 266200,China;Urban Rail Branch of Qingdao Urban Space Investment and Operation Co.,Ltd.,Qingdao 266000,China;Qingdao Urban Space Investment and Operation Co.,Ltd.,Qingdao 266000,China)

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033 [2]青岛市政空间开发集团有限责任公司,山东青岛266000 [3]青岛市政集团砼业工程有限责任公司,山东青岛266200 [4]青岛市政空间开发集团有限责任公司城轨分公司,山东青岛266000 [5]青岛城市空间投资运营有限责任公司,山东青岛266000

出　　处：《混凝土与水泥制品》2022年第9期25-28,共4页China Concrete and Cement Products

基　　金：国家自然科学基金重点国际合作项目(51420105015);国家重点基础研究发展计划“973”项目(2015CB655100);“十三五”国家重点研发计划项目(2017YFB0310004-05)。

摘　　要：研究了凝胶型和颗粒型纳米SiO_(2)的分散性和掺量对混凝土的抗压强度、抗碳化性能和抗氯离子渗透性能的影响。结果表明:同条件下,凝胶型比颗粒型纳米SiO_(2)的分散性好;经过超声处理的比未超声处理的纳米SiO_(2)的分散性要好,可以有效改善混凝土的后期抗压强度、抗碳化性能和抗氯离子渗透性能;在一定范围内,纳米SiO_(2)的掺量越大,对混凝土的性能改善效果越明显。The effects of the dispersibility and content of gel-type and particle-type nano-SiO_(2)on the compressive strength,carbonation resistance and chloride ion penetration resistance of concrete were studied.The results show that under the same conditions,the dispersibility of the gel-type nano-SiO_(2)is better than that of the particle-type nano-SiO_(2).The dispersibility of the nano-SiO_(2)dispersed by ultrasonic is better than that of the non-ultrasonic dispersed nano-SiO_(2),which can effectively improve the later compressive strength,anti-carbonization performance and the resistance to chloride ion penetration of concrete.Within a certain range,the larger the content of nano-SiO_(2),the more obvious the effect of improving the performance of concrete.

关 键 词：纳米SiO_(2) 抗压强度 抗碳化性能 抗氯离子渗透性能 

分 类 号：TU528.041[建筑科学—建筑技术科学]