纳米偏高岭土-粉煤灰水泥砂浆早期拉伸试验研究

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大连海事大学学报 ›› 2025, Vol. 51 ›› Issue (4) : 101-110.

范颖芳^*，于明杰，李秋超

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Experimental study on the early tensile behavior of fly ash cement mortar containing NMK

FAN Yingfang^*，YU Mingjie，LI Qiuchao

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摘要

为了探明纳米偏高岭土对粉煤灰水泥砂浆早期抗拉性能的改善效果，考虑4种纳米偏高岭土掺量（1%、3%、5%、7%）、3种粉煤灰掺量（10%、20%、30%），浇筑40个水泥砂浆试件。利用直接拉伸法测试水泥砂浆试件早期（3h、4h、5h、6h、8h、10h）抗拉性能，采用数字图像相关方法记录拉伸过程中水泥砂浆试件表面应变，得到水泥砂浆抗拉力学性能参数。结果表明：粉煤灰降低了水泥砂浆早期抗拉强度，掺30%粉煤灰砂浆6h抗拉强度较普通砂浆降低52.4%；纳米偏高岭土对水泥砂浆早期抗拉强度改善效果显著，掺5%纳米偏高岭土砂浆6h抗拉强度为普通砂浆的4倍；纳米偏高岭土有效提升粉煤灰砂浆早期抗拉强度，掺5%纳米偏高岭土对10%掺量的粉煤灰砂浆6h极限抗拉强度提升率为23%。

Abstract

The effect of nano-metakaolin on the tensile properties of fly ash cement mortar at early age was investigated. 4 nano-metakaolin contents (1%, 3%, 5%, 7%) and 3 fly ash contents (10%, 20%, 30%) were taken into consideration. 40 cement mortar specimens were prepared in the laboratory. The direct tensile experiments were executed on the prepared mortars at early age (3h, 4h, 5h, 6h, 8h, 10h). The digital image correlation technique was applied to monitor the strain on the surface of specimens during the tensile process. Tensile behavior of the mortar specimens were obtained. The results show that the addition of fly ash leads to a reduction in the tensile strength, the tensile strength of mortar with 30% fly ash at 6h decreased by 52.4% compared to ordinary mortar. The addition of nano-metakaolin significantly improves the tensile properties of both ordinary mortar and fly ash cement mortar at early age. Specifically, the tensile strength of mortar with 5% nano-metakaolin reached 4 times that of ordinary cement mortar at 6h. Moreover, incorporating 5% nano-metakaolin increased the 6h ultimate tensile strength of mortar containing 10% fly ash by 23%.

导出引用

范颖芳, 于明杰, 李秋超. 纳米偏高岭土-粉煤灰水泥砂浆早期拉伸试验研究[J]. 大连海事大学学报. 2025, 51(4): 101-110

FAN Yingfang, YU Mingjie, LI Qiuchao. Experimental study on the early tensile behavior of fly ash cement mortar containing NMK[J]. Journal of Dalian Maritime University. 2025, 51(4): 101-110

参考文献

[1]GAO J M, WANG B, DU Z Y, et al. Molten salt synthesis of mullite whiskers entirely derived from fly ash for electronic packaging toughening ceramic applications[J]. Journal of Materials Research and Technology, 2022, 21: 3719-3731.
[2]DEGLOORKAR N K, PANCHARATHI R K. Use of particle packing methods for development of lime fly ash-based mortars for repair of heritage structures[J]. Materials Today: Proceedings, 2022, 61(2): 123-131.
[3]JAIN D, GUPTA R, CHOUDHARY R, et al. Utilization of marble dust and fly ash in composite mortar as partial cement substitute[J]. Materials Today: Proceedings, 2022, 60(1): 181-186.
[4]MOHAMMED A, RAFIQ S, SIHAG P, et al. ANN, M5P-tree and nonlinear regression approaches with statistical evaluations to predict the compressive strength of cement-based mortar modified with fly ash[J]. Journal of Materials Research and Technology, 2020, 9(6): 12416-12427.
[5]李林香. 不同矿物掺和料对混凝土抗拉性能的影响[J]. 铁道建筑, 2021, 61 (2): 130-133.
LI L X. Influence of different mineral admixtures on tensile performance of concrete[J]. Railway Engineering, 2021, 61 (2): 130-133. (in Chinese)
[6]杨建林, 王来贵, 潘纪伟,等. 玄武岩纤维增强水泥砂浆的拉破坏试验研究[J]. 硅酸盐通报, 2016, 35 (2): 536-542.
YANG J L, WANG L G, PAN J W, et al. Experimental research on tensile failure of cement mortar reinforced by basalt fiber[J]. Bulletin of the Chinese Ceramic Society, 2016, 35 (2): 536-542. (in Chinese)
[7]田正宏, 江桂林, 吴军,等. 高应变率下新型纤维砂浆动态劈拉特性[J]. 建筑材料学报, 2018, 21 (2): 189-195.
TIAN Z H, JIANG G L, WU J, et al. Dynamic splitting tensile properties of mortar mixed with new fibers subjected to high strain rate[J]. Journal of Building Materials, 2018, 21 (2): 189-195. (in Chinese)
[8]赵楠, 卿龙邦, 杨卓凡,等. 不同龄期钢纤维增强水泥砂浆纤维拉拔试验与模拟研究[J]. 硅酸盐通报, 2021, 40 (7): 2165-2173.
ZHAO N, QING L B, YANG Z F, et al. Experimental and numerical studies on fiber pull-out of steel fiber reinforced cement mortar at different ages[J]. Bulletin of the Chinese Ceramic Society, 2021, 40 (7): 2165-2173. (in Chinese)
[9]于洪涛, 丁一宁, NIEDEREGGER C. 不同非金属纤维对砂浆劈拉强度及韧性的影响[J]. 建筑技术, 2009, 40 (1): 34-38.
YU H T, DING Y N, NIEDEREGGER C. Influence of different non-metallic fiber on splitting strength and toughness of mortar[J]. Architecture Technology, 2009, 40 (1): 34-38. (in Chinese)
[10]MA Q Y, ZHU Y. Experimental research on the microstructure and compressive and tensile properties of nano-SiO2 concrete containing basalt fibers[J]. Underground Space,2017,2(3):175-181.
[11]MAURYA S K, BHATROLA K, KOTHIYAL N C. Sustainable development of mortar with low carbon admixed High Volume Fly Ash [J].Materials Today: Proceedings,2023,93(3): 428-435.
[12]ANKAMMA V, KUMAR A S. Investigation study of enhance the strength by using hybrid nano-composites on conventional cement concrete[J]. Materials Today: Proceedings,2023,72(6):2939-2945.
[13]CHUAH S, PAN Z, SANJAYAN J G, et al. Nano reinforced cement and concrete composites and new perspective from graphene oxide [J].Construction and Building Materials,2014,73:113-124.
[14]MORSY M S, SHOUKRY H, MOKHTAR M M, et al. Facile production of nano-scale metakaolin: An investigation into its effect on compressive strength, pore structure and microstructural characteristics of mortar[J]. Construction and Building Materials,2018,172:243-250.
[15]范颖芳, 张均良, 李秋超. 纳米偏高岭土对水泥砂浆断裂性能影响的试验研究[J]. 东南大学学报(自然科学版), 2020, 50 (4): 637-644.
FAN Y F, ZHANG J L, LI Q C. Experimental study on the effect of nano-metakaolin on the fracture behavior of cement mortar[J]. Journal of Southeast University(Natural Science Edition), 2020, 50 (4): 637-644. (in Chinese)
[16]HOU P K, KAWASHIMA S, KONG D Y, et al. Modification effects of colloidal nanoSiO2 on cement hydration and its gel property[J]. Composites Part B: Engineering,2013,45(1):440-448.
[17]刘晓鹏.聚丙烯纤维混凝土早期塑性抗拉强度研究[D].大连:大连理工大学,2021.
LIU X P. Study on early plastic tensile strength of polypropylene fiber reinforced concrete[D]. Dalian: Dalian University of Technology,2021. (in Chinese)
[18]邵爽爽, 金祖权, 于泳,等. 早龄期砂浆抗拉强度及弹性模量研究[J]. 建筑材料学报, 2020, 23 (4): 748-754.
SHAO S S, JIN Z Q, YU Y. Study on tensile strength and elastic modulus of early age mortar[J]. Journal of Building Materials, 2020, 23 (4): 748-754. (in Chinese)
[19]郭强, 李秀领, 王帅,等. 高延性再生微粉混凝土抗拉性能试验研究[J]. 混凝土, 2022(2): 102-106.
GUO Q, LI X L, WANG S, et al. Experimental study on tensile properties of high ductility recycled powder concrete[J]. Concrete, 2022(2): 102-106. (in Chinese)
[20]程子扬, 陈国夫, 屠艳平. 纳米CaCO3对粉煤灰再生骨料混凝土性能及微结构的影响[J]. 建筑材料学报, 2023, 26 (3): 228-235.
CHENG Z Y, CHEN G F, TU Y P. Effect of nano CaCO3 on properties and microstructure of fly ash recycled aggregate concrete[J]. Journal of Building Materials, 2023, 26 (3): 228-235. (in Chinese)