PVA胶粉和PP纤维对碱矿渣自流平修补砂浆粘结性能的影响

摘要/Abstract

摘要： 粘结界面是旧混凝土结构修补后的薄弱环节,是影响修补砂浆与混凝土基体界面粘结性能的重要因素。本文以碱矿渣(AAS)水泥作为胶凝材料制备修补砂浆,通过对流动性、界面弯拉强度、界面拉伸强度、微观形貌等进行测试,研究了聚乙烯醇(PVA)胶粉和聚丙烯(PP)纤维对碱矿渣自流平修补砂浆(ASLRM)界面粘结性能和微观结构的影响。结果表明,PVA胶粉和PP纤维均能有效提高ASLRM的界面粘结性能,二者复掺时,28 d界面弯拉强度最高可提高43.1%,14 d界面拉伸强度最高可提高69.9%。

关键词: 碱矿渣水泥, 自流平修补砂浆, PVA胶粉, PP纤维, 粘结性能, 粘结界面

Abstract: The bonding interface is the weak link of old concrete structure after repair, and it is an important factor affecting the bonding properties of the interface between repair mortar and concrete matrix. In this paper, AAS cement was used as cementitious material to prepare repair mortar. The effects of polyvinyl alcohol (PVA) latex powder and polypropylene (PP) fiber on the interfacial bonding properties and microstructure of alkali-activated slag self-leveling repair mortar (ASLRM) were studied by fluidity test, interfacial flexural tensile strength test, interfacial tensile strength test and microscopic test. The results show that both PVA latex powder and PP fiber can effectively improve the interfacial bonding properties of ASLRM. When the two are mixed, the interfacial flexural tensile strength of 28 d increases by 43.1%, and the interfacial tensile strength of 14 d increases by 69.9%.

Key words: alkali-activated slag cement, self-leveling repair mortar, PVA latex powder, PP fiber, bonding property, bonding interface

中图分类号:

TU528

何娟, 武佳涵, 朱明明, 任海涛, 桑国臣. PVA胶粉和PP纤维对碱矿渣自流平修补砂浆粘结性能的影响[J]. 硅酸盐通报, 2024, 43(11): 4130-4139.

HE Juan, WU Jiahan, ZHU Mingming, REN Haitao, SANG Guochen. Effects of PVA Latex Powder and PP Fiber on Bonding Property of Alkali-Activated Slag Self-Leveling Repair Mortar[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(11): 4130-4139.

参考文献

[1] HASSAN K E, BROOKS J J, AL-ALAWI L. Compatibility of repair mortars with concrete in a hot-dry environment[J]. Cement and Concrete Composites, 2001, 23(1): 93-101.
[2] 叶丹玫, 孙振平, 郑柏存, 等. 聚合物改性水泥基修补材料的研究现状及发展措施[J]. 材料导报, 2012, 26(7): 131-135.
YE D M, SUN Z P, ZHENG B C, et al. Current research status and development initiative of polymer-modified cementitious repair material[J]. Materials Review, 2012, 26(7): 131-135 (in Chinese).
[3] 王建苗, 高越青, 詹培敏, 等. 磷酸钾镁水泥修补材料研究综述[J]. 硅酸盐通报, 2021, 40(11): 3533-3543.
WANG J M, GAO Y Q, ZHAN P M, et al. Research review of magnesium potassium phosphate cement repair materials[J]. Bulletin of the Chinese Ceramic Society, 2021, 40(11): 3533-3543 (in Chinese).
[4] 汤安琪. 聚合物改性碱激发矿渣修补材料设计制备及性能研究[D]. 徐州: 中国矿业大学, 2021.
TANG A Q. Study on design, preparation and performance of polymer modified alkaliactivated slag repair material[D]. Xuzhou: China University of Mining and Technology, 2021 (in Chinese).
[5] MELO NETO A A, CINCOTTO M A, REPETTE W. Drying and autogenous shrinkage of pastes and mortars with activated slag cement[J]. Cement and Concrete Research, 2008, 38(4): 565-574.
[6] DURAN ATIŞ C, BILIM C, ÇELIK Ö, et al. Influence of activator on the strength and drying shrinkage of alkali-activated slag mortar[J]. Construction and Building Materials, 2009, 23(1): 548-555.
[7] YANG J S, WANG R, ZHANG Y Y. Influence of dually mixing with latex powder and polypropylene fiber on toughness and shrinkage performance of overlay repair mortar[J]. Construction and Building Materials, 2020, 261: 120521.
[8] KHALIFA A Z, CIZER Ö, PONTIKES Y, et al. Advances in alkali-activation of clay minerals[J]. Cement and Concrete Research, 2020, 132: 106050.
[9] PUERTAS F, GONZÁLEZ-FONTEBOA B, GONZÁLEZ-TABOADA I, et al. Alkali-activated slag concrete: fresh and hardened behaviour[J]. Cement and Concrete Composites, 2018, 85: 22-31.
[10] LASKAR S M, MOZUMDER R A, LASKAR A I. Behaviour of RC beam repaired using alkali activated slag-based agent under static and cyclic loading[J]. Structures, 2021, 31: 761-768.
[11] FAN J C, ZHU H G, SHI J, et al. Influence of slag content on the bond strength, chloride penetration resistance, and interface phase evolution of concrete repaired with alkali activated slag/fly ash[J]. Construction and Building Materials, 2020, 263: 120639.
[12] 中华人民共和国工业和信息化部. 轻烧氧化镁化学活性测定方法: YB/T 4019—2020[S]. 北京: 冶金工业出版社, 2020.
Ministry of Industry and Information Technology of the People's Republic of China. Determination method of chemical activity of light burned magnesium oxide: YB/T 4019—2020[S]. Beijing: Metallurgical Industry Press, 2020 (in Chinese).
[13] 中华人民共和国国家质量监督检验检验总局, 中国国家标准化管理委员会. 水泥胶砂流动度测定方法: GB/T 2419—2005[S]. 北京: 中国标准出版社, 2005.
General Administration of Quality Supervision of the People's Republic of China, Inspection and Quarantine of the People's Republic of China. Test method for fluidity of cement mortar: GB/T 2419—2005[S]. Beijing: China Standard Publishing House, 2005 (in Chinese).
[14] 国家市场监督管理总局, 国家标准化管理委员会. 水泥胶砂强度检验方法(ISO法): GB/T 17671—2021[S]. 北京: 中国标准出版社, 2021.
State Administration for Market Supervision and Administration, National Standardization Management Committee. Cement mortar strength test method (ISO method): GB/T 17671—2021[S]. Beijing: China Standard Publishing House, 2021 (in Chinese).
[15] 中华人民共和国工业和信息化部. 修补砂浆: JC/T 2381—2016[S]. 北京: 建材工业出版社, 2016.
Ministry of Industry and Information Technology of the People's Republic of China. Repair mortar: JC/T 2381—2016[S]. Beijing: Building Materials Industry Press, 2016 (in Chinese).
[16] 国家质量监督检验检疫总局, 中国国家标准化管理委员会. 建筑防水涂料试验方法: GB/T 16777—2008[S]. 北京: 中国标准出版社, 2009.
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, National Standardization Administration of China. Test methods for building waterproofing coatings: GB/T 16777—2008[S]. Beijing: China Standards Publishing House, 2009 (in Chinese).
[17] PAIVA H, SILVA L M, LABRINCHA J A, et al. Effects of a water-retaining agent on the rheological behaviour of a single-coat render mortar[J]. Cement and Concrete Research, 2006, 36(7): 1257-1262.
[18] ZÁRYBNICKÁ L, MÁCOVÁ P, VIANI A. Properties enhancement of magnesium phosphate cement by cross-linked polyvinyl alcohol[J]. Ceramics International, 2022, 48(2): 1947-1955.
[19] MANSUR H S, SADAHIRA C M, SOUZA A N, et al. FTIR spectroscopy characterization of poly (vinyl alcohol) hydrogel with different hydrolysis degree and chemically crosslinked with glutaraldehyde[J]. Materials Science and Engineering: C, 2008, 28(4): 539-548.
[20] ZHU C, ZHANG J X, PENG J H, et al. Physical and mechanical properties of gypsum-based composites reinforced with PVA and PP fibers[J]. Construction and Building Materials, 2018, 163: 695-705.
[21] CAO Q, CHENG Y, CAO M, et al. Workability, strength and shrinkage of fiber reinforced expansive self-consolidating concrete[J]. Construction and Building Materials, 2017, 131: 178-85.
[22] PAIVA H, SILVA L M, LABRINCHA J A, et al. Effects of a water-retaining agent on the rheological behaviour of a single-coat render mortar[J]. Cement and Concrete Research, 2006, 36(7): 1257-1262.
[23] ZÁRYBNICKÁ L, MÁCOVÁ P, VIANI A. Properties enhancement of magnesium phosphate cement by cross-linked polyvinyl alcohol[J]. Ceramics International, 2022, 48(2): 1947-1955.
[24] 陈宗瑞. 环氧树脂改性水泥修补砂浆的性能研究[D]. 武汉: 武汉理工大学, 2019.
CHEN Z R. Study on performance of cement repair mortar modified by epoxy resin[D].Wuhan: Wuhan University of Technology, 2019 (in Chinese).
[25] SHI C, WANG P, MA C Y, et al. Effects of SAE and SBR on properties of rapid hardening repair mortar[J]. Journal of Building Engineering, 2021, 35: 102000.
[26] FENG S, XIAO H G, ZHANG R L, et al. Bond performance between substrate concrete and repair mortar: effect of carbon fibre and expansive agent[J]. Construction and Building Materials, 2020, 250: 118830.
[27] QIAO G F, GUO B B, LI Z H, et al. Corrosion behavior of a steel bar embedded in a cement-based conductive composite[J]. Construction and Building Materials, 2017, 134: 388-396.
[28] XU F, ZHOU M K, CHEN J P, et al. Mechanical performance evaluation of polyester fiber and SBR latex compound-modified cement concrete road overlay material[J]. Construction and Building Materials, 2014, 63: 142-149.
[29] 鹿宇, 万小梅, 赵铁军, 等. 环氧树脂改性碱矿渣修补砂浆的黏结性能及微观结构研究[J]. 硅酸盐通报, 2019, 38(4): 1086-1090+1107.
LU Y, WAN X M, ZHAO T J, et al. Bonding properties and microstructure of epoxy resin modified repair mortar based on alkali-activated slag[J]. Bulletin of the Chinese Ceramic Society, 2019, 38(4): 1086-1090+1107 (in Chinese).