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材料导报  2021, Vol. 35 Issue (22): 22045-22050    https://doi.org/10.11896/cldb.20070281
  无机非金属及其复合材料 |
硅烷复合乳液对水泥砂浆干燥收缩性能及力学性能的影响
徐士林1, 李绍纯2,3, 耿永娟2,3, 张友来4, 陈旭5, 许绍宸1
1 青岛理工大学土木工程学院,青岛 266033
2 山东省蓝色经济区工程建设与安全协同创新中心,青岛 266033
3 山东省海洋环境混凝土材料腐蚀控制与检测研究创新团队,青岛 266033
4 中建西部建设山东有限公司,青岛 266033
5 中建西部建设新疆有限公司,乌鲁木齐 830000
Influence of Silane Composite Emulsion on Drying Shrinkage and Mechanical Properties of Cement Mortar
XU Shilin1, LI Shaochun2,3, GENG Yongjuan2,3, ZHANG Youlai4, CHEN Xu5, XU Shaochen1
1 School of Civil Engineering, Qingdao University of Technological, Qingdao 266033, China
2 Cooperative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone, Qingdao 266033, China
3 Marine Environment Concrete Material Corrosion Control and Monitoring Research and Innovation Team, Qingdao 266033, China
4 China West Construction Group Co.,Ltd., Qingdao 266033, China
5 China West Construction Group Co.,Ltd.,Wulumuqi 830000, China
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摘要 将氧化石墨烯/异丁基三乙氧基硅烷复合乳液(GO/IBTS复合乳液)和正硅酸四乙酯/异丁基三乙氧基硅烷复合乳液(TEOS/IBTS复合乳液)分别内掺到水泥砂浆中,研究了两种硅烷复合乳液在不同掺量下对砂浆在养护过程中的干燥收缩性能、水分散失和力学性能的影响。研究结果表明:GO/IBTS复合乳液能有效抑制砂浆的干燥收缩和水分散失,当掺量为2%时,砂浆干燥收缩量和水分散失量达到最小,而且力学强度达到平均最高;TEOS/IBTS复合乳液对砂浆干燥收缩和水分散失的抑制作用不明显,但是当掺量为2%时,力学性能达到最大,抗压强度和抗折强度分别提高了5%和17%;但两种硅烷复合乳液掺量不宜超过水泥质量的3%。通过SEM、EDS测试发现,GO/IBTS复合乳液会在砂浆内部形成一层分散均匀的絮状结构。另外,红外光谱测试结果表明,硅烷复合乳液通过化学键与水泥基材料相结合。
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徐士林
李绍纯
耿永娟
张友来
陈旭
许绍宸
关键词:  硅烷复合乳液  水泥砂浆  干燥收缩  水分散失  力学性能    
Abstract: Graphene oxide/isobutyltriethoxysilane composite emulsion (GO/IBTS composite emulsion) and tetraethoxysilane/isobutyltriethoxysilane composite emulsion (TEOS/IBTS composite emulsion) are two new silane composite emulsion. The effects of the addition of two silane composite emulsions on the properties of cementitious mortar formulations with different dosage were studied. Drying shrinkage and water loss of hardening mortars during dry curing conditions and the mechanical properties of hardened mortars were measured in order to investigate the impact of silane composite emulsion on the properties of mortars. It was found that GO/IBTS composite emulsion could effectively inhibit the drying shrinkage and water loss of mortars. The drying shrinkage and water loss of mortars reached the minimum when the GO/IBTS composite emulsion content was 2%, and the mechanical strength reaches the highest average. TEOS/IBTS composite emulsion has no obvious inhibitory effect on mortar drying shrinkage and water loss. However, when the content is 2%, the mechanical properties reach the maximum, and the compressive strength and flexural strength increase by 5% and 17% respectively. The content of two silane composite emulsions should not exceed 3% of cement quality. SEM and EDS tests showed that GO/IBTS composite emulsion formed a dispersed and uniform flocculent structure inside the mortar. In addition, the infrared spectroscopy test results also showed that the silane composite emulsion has been combined with the mortar through chemical bonding.
Key words:  silane composite emulsion    cement mortar    drying shrinkage    water loss    mechanical property
出版日期:  2021-11-25      发布日期:  2021-12-13
ZTFLH:  TU528  
基金资助: 国家自然科学基金(51778308;51978355);江苏省土木工程材料重点实验室开放基金(CM2016-04;CM2016-06);山东省蓝色经济区工程建设与安全协同创新中心开放基金
通讯作者:  lishaochun@qut.edu.cn   
作者简介:  徐士林,青岛理工大学,硕士研究生,主要从事复合硅烷材料对混凝土抗裂性能影响研究。
李绍纯,青岛理工大学土木工程学院教授,2008年获浙江大学材料科学与工程专业博士学位。山东省优秀青年创新团队带头人,新疆维吾尔自治区高层次人才,中国硅酸盐学会溶胶凝胶分会理事,山东省建筑学会理事。发表学术论文60余篇,其中SCI、EI收录39篇,授权国家发明专利9项,PCT专利3项,获教育部科技进步二等奖、山东省科技进步二等奖、新疆维吾尔自治区科技进步三等奖、青岛市科技进步二等奖等科研奖励。目前主要从事海洋环境下高性能混凝土的制备及耐久性研究,具体研究方向为混凝土表层防护技术以及海洋环境下混凝土结构耐久性评估体系。近年来,通过溶胶-凝胶法研发了氧化石墨烯/硅烷、纳米SiO2溶胶/硅烷等系列复合材料,并将其应用于海洋环境下水泥基材料表面微观结构优化及表面性能强化等方面,研究了各种涂层对海洋环境下混凝土结构耐久性能、抗生物腐蚀性能的影响,并取得了良好的效果。主持了国家自然科学基金、高性能土木工程材料国家重点实验室开放基金项目、硅酸盐建筑材料国家重点实验室开放基金等课题,参与了“973”项目、国家自然科学基金国际合作重点项目、铁道部科技计划项目等国家级重点课题,相关成果应用于胶州湾海底隧道、青岛地铁、青连铁路、青荣高速等海洋重大工程项目。
引用本文:    
徐士林, 李绍纯, 耿永娟, 张友来, 陈旭, 许绍宸. 硅烷复合乳液对水泥砂浆干燥收缩性能及力学性能的影响[J]. 材料导报, 2021, 35(22): 22045-22050.
XU Shilin, LI Shaochun, GENG Yongjuan, ZHANG Youlai, CHEN Xu, XU Shaochen. Influence of Silane Composite Emulsion on Drying Shrinkage and Mechanical Properties of Cement Mortar. Materials Reports, 2021, 35(22): 22045-22050.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.20070281  或          http://www.mater-rep.com/CN/Y2021/V35/I22/22045
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