Study on the synergistic effect of granulated blast furnace slag and basalt fiber on concrete performance
-
摘要: 粒化高炉矿渣(Granulated Blast Furnace Slag,GBFS)大量堆积造成了潜在环境风险。研究以GBFS替代部分或全部机制砂(Manufactured Sand,MS),并掺入玄武岩纤维(Basalt Fiber,BF)配制混凝土,测试其工作性能与力学性能,并通过微观图像分析二者对混凝土性能的影响机理。结果表明:GBFS替砂符合规范要求,以混凝土立方体抗压强度(fcu)为考核指标,最佳替砂率为60%,较基准混凝土28 d强度提升12.4%;单掺BF的最佳掺量为0.3%;协同影响最优配合比为水胶比0.35、GBFS替代率60%、BF长度9 mm-0.3%掺量、减水剂掺量1.5%。GBFS替砂能促进二次水化作用,生成更多C-S-H凝胶并细化孔隙;BF在基体中起到有效桥接和减小裂缝的作用,弥补GBFS替砂后引起的混凝土早期强度降低的问题。Abstract: The large accumulation of granulated blast furnace slag (GBFS) has caused potential environmental risks. In this study, GBFS was used to replace part or all of the manufactured sand (MS), and Basalt fiber (BF) was added to prepare concrete. The working performance and mechanical properties of concrete were tested, and the influence mechanism of the two on the above properties of concrete was analyzed by microscopic image. The results show that the GBFS sand replacement meets the requirements of the specification. The compressive strength of the concrete cube is used as the assessment index, the optimal sand replacement rate is 60%, which is 12.4% higher than the strength of the 28d benchmark concrete. The optimum content of BF is 0.3%. The optimal mix ratio of synergistic effect is water-binder ratio 0.35, GBFS replacement rate 60%, BF length 9 mm-0.3%, and water reducing agent 1.5%. GBFS sand replacement can promote secondary hydration, generate more C-S-H gel and refine pores. Meanwhile, BF plays an effective role in bridging and reducing cracks in the matrix, and makes up for the reduction of early strength of concrete caused by GBFS sand replacement.
-
表 1 GBFS主要化学成分
Table 1. Main chemical composition of blast furnace slag
% CaO SiO2 Al2O3 MgO SO3 Fe2O3 K2O P2O5 Burning
vector39.7 30.8 8.2 4.5 2.4 1.0 0.6 4.23 表 2 BF主要性能指标
Table 2. Main performance indicators of basalt fiber
Fiber name Monofilament diameter/μm Fiber length/mm Density/(g·cm−3) Tensile strength/MPa Elastic modulus/GPa Breaking elongation/% BF 15 9,12,15 2.65 3000 ~4800 91~110 2.4~3.0 表 3 GBFS替砂混凝土配合比
Table 3. The mix proportion of GBFS concrete for sand replacement
Numbering Raw material/(kg·m−3) Rate of
substitution/%Cement Water MS GBFS CS Water reducing
admixtureNC 417 165 777 0 1031 4.17 0 GBFS-20 621.6 142.6 1013.1 20 GBFS-30 543.9 214.0 1004.6 30 GBFS-40 466.2 285.3 996.1 40 GBFS-50 388.5 356.6 987.7 50 GBFS-60 310.8 427.9 979.2 60 GBFS-70 233.1 499.2 970.88 70 GBFS-80 155.4 570.6 962.3 80 GBFS-100 0 713.2 945.4 100 表 4 BF掺入混凝土配合比
Table 4. BF mixed with concrete mix ratio
Numbering Raw material/(kg·m−3) Length/
mmMixing
amount/%Cement Water MS CS Water reducing
admixtureBF NC 417 165 777 1031 4.17 0 0 0 BF-9-0.1 2.65 9 0.1 BF-9-0.3 7.95 9 0.3 BF-9-0.5 13.25 9 0.5 BF-12-0.1 2.65 12 0.1 BF-12-0.3 7.95 12 0.3 BF-12-0.5 13.25 12 0.5 BF-15-0.1 2.65 15 0.1 BF-15-0.3 7.95 15 0.3 BF-15-0.5 13.25 15 0.5 表 5 正交试验具体方案
Table 5. The specific scheme of orthogonal test
Numbering Factor 1 Factor 2 Factor 3 Factor 4 A water-binder
ratioB GBFS
replacement
rate/%C BF length/
mmD water
reducing
agent/%1 1 0.35 1 50 1 9 1 1.0 2 1 0.35 2 60 2 12 2 1.5 3 1 0.35 3 70 3 15 3 2.0 4 2 0.40 1 50 2 12 3 2.0 5 2 0.40 2 60 3 15 1 1.0 6 2 0.40 3 70 1 9 2 1.5 7 3 0.45 1 50 3 15 2 1.5 8 3 0.45 2 60 1 9 3 2.0 9 3 0.45 3 70 2 12 1 1.0 表 6 GBFS与MS筛分试验结果
Table 6. GBFS and MS screening test results
Nominal size/mm Scoring sieve residue/% Accumulated sieving residue/% II Grading Area GBFS MS GBFS MS 5.0 0.2 2.7 0.2 2.7 10~0 2.5 2.8 19.2 3.0 21.9 25~0 1.25 24.2 20.0 27.2 42.0 50~10 0.63 41.7 20.1 68.9 62.0 70~41 0.315 20.6 19.7 89.6 81.8 92~70 0.160 7.1 13.5 96.7 95.2 100~90 表 7 骨料性能
Table 7. Aggregate properties
Materials Apparent density/(kg·m−3) Packing density/(kg·m−3) Crushing value/% Particle grading composition Fineness modulus MS 2740 1598 8.3 0.160~5.0 2.97 GBFS 2515 1431 15.2 0.160~5.0 2.85 CS 2657 1459 9.7 5.0~20.0 表 8 正交试验结果
Table 8. Results of orthogonal test
Numbering Slump/mm Compressional
strength/MPaSplit tensile
strength/MPa3 d 7 d 14 d 28 d 7 d 28 d 1 115 32.9 39.4 48.2 52.4 3.41 4.42 2 130 30.3 38.0 46.6 52.5 3.64 4.66 3 145 30.0 36.2 45.8 50.8 3.83 4.73 4 160 26.7 33.2 40.6 46.7 3.12 4.10 5 115 28.4 34.6 42.5 47.2 3.27 4.32 6 140 27.0 33.6 40.4 46.8 2.98 4.13 7 150 22.9 25.8 34.3 40.2 2.89 3.79 8 170 21.4 27.9 35.5 40.8 2.55 3.32 9 120 21.4 25.5 33.2 39.3 2.69 3.50 表 9 最优配合比确定
Table 9. Determination of the optimal mix proportion
Experiment Curing
age/dPriority order
of factorsBest
organizationOptimum
mixWorking
performanceD>A>C>B A3B1C1D3 A1B2C1D2 Compressive
strength3 A>D>B>C A1B1C3D1 7 A>B>C>D A1B2C1D2 14 A>B>C>D A1B2C1D1 28 A>B>C>D A1B2C1D2 Splitting tensile
strength7 A>C>B>D A1B3C3D2 28 A>C>B>D A1B3C3D2 -
[1] YAN Z Z, ZHANG S H, ZHANG S Q, et al. Research status of the influence of the blast furnace slag microstructure on its metallurgical properties[J]. Iron Steel Vanadium Titanium, 2017, 38(4): 123-129. (严照照, 张淑会, 张淑卿, 等. 高炉渣微观结构对其冶金性能的影响[J]. 钢铁钒钛, 2017, 38(4): 123-129. doi: 10.7513/j.issn.1004-7638.2017.04.022YAN Z Z, ZHANG S H, ZHANG S Q, et al. Research status of the influence of the blast furnace slag microstructure on its metallurgical properties[J]. Iron Steel Vanadium Titanium, 2017, 38(4): 123-129. doi: 10.7513/j.issn.1004-7638.2017.04.022 [2] WANG H, WANG X J, GUI F, et al. The status and prospect of blast furnace slag resource utilization[J]. Industrial Minerals & Processing, 2021, 50(11): 48-53. (王浩, 王晓佳, 桂峰, 等. 高炉矿渣资源化利用现状及展望[J]. 化工矿物与加工, 2021, 50(11): 48-53.WANG H, WANG X J, GUI F, et al. The status and prospect of blast furnace slag resource utilization[J]. Industrial Minerals & Processing, 2021, 50(11): 48-53. [3] ZHANG T L, HU K, CHEN Y J, et al. A wet carbonation enhancement approach to synergistic preparation of alkali-activated artificial aggregates from waste concrete powder and ground granulated blastfurnace slag[J]. Construction and Building Materials, 2025, 486: 142012. doi: 10.1016/j.conbuildmat.2025.142012 [4] SHI D S, YANG J Q, HAN J T, et al. Experiment study on salt freezing and self-healing properties of granulated blast furnace slag high strength cement-based materials[J]. China Concrete and Cement Products, 2020(4): 96-99. (石东升, 杨嘉奇, 韩佳彤, 等. 粒化高炉矿渣高强水泥基材料盐冻与自愈性能试验研究[J]. 混凝土与水泥制品, 2020(4): 96-99.SHI D S, YANG J Q, HAN J T, et al. Experiment study on salt freezing and self-healing properties of granulated blast furnace slag high strength cement-based materials[J]. China Concrete and Cement Products, 2020(4): 96-99. [5] ZHANG P, SHI D S, HAN P, et al. Study on the mechanical properties and pore structure of granulated blast furnace slag self-compacting concrete based on grey correlation theory[J]. Journal of Asian Architecture and Building Engineering, 2024, 23(2): 634-648. doi: 10.1080/13467581.2023.2244559 [6] SONG W M, YI J, WU H, et al. Effect of carbon fiber on mechanical properties and dimensional stability of concrete incorporated with granulated-blast furnace slag[J]. Journal of Cleaner Production, 2019, 238: 117819. doi: 10.1016/j.jclepro.2019.117819 [7] JOSHI R A, JOSHI S G, LONDHE S N, et al. Influence of α-alumina on mechanical, durability and microstructural properties of high volume GGBS concrete[J]. Journal of Building Pathology and Rehabilitation, 2025, 10(1): 61. doi: 10.1007/s41024-025-00564-1 [8] TIAN W, WAN J H, CHENG X, et al. Synergistic carbon sequestration properties and microstructure of steel slag-granulated blast furnace slag based cementitious materials[J]. Journal of Building Materials, 2025, 28(5): 434-441. (田威, 万嘉豪, 程续, 等. 钢渣-粒化高炉矿渣基胶凝材料协同固碳性能与微观结构[J]. 建筑材料学报, 2025, 28(5): 434-441. doi: 10.3969/j.issn.1007-9629.2025.05.006TIAN W, WAN J H, CHENG X, et al. Synergistic carbon sequestration properties and microstructure of steel slag-granulated blast furnace slag based cementitious materials[J]. Journal of Building Materials, 2025, 28(5): 434-441. doi: 10.3969/j.issn.1007-9629.2025.05.006 [9] SU D G, LU L, LONG Z Y, et al. Preparation and properties study of ternary composite admixture con-sisting of silica fume, yellow phosphorus slag, and high titanium blast furnace slag[J]. Iron Steel Vanadium Titanium, 2025, 46(4): 80-87. (苏达刚, 鲁莉, 龙钊永, 等. 硅灰-黄磷渣-高钛型高炉渣三元复合掺合料的制备与性能研究[J]. 钢铁钒钛, 2025, 46(4): 80-87.SU D G, LU L, LONG Z Y, et al. Preparation and properties study of ternary composite admixture con-sisting of silica fume, yellow phosphorus slag, and high titanium blast furnace slag[J]. Iron Steel Vanadium Titanium, 2025, 46(4): 80-87. [10] LI M X. Experimental study of granulated blast furnace slag as fineaggregate concrete[D]. Handan: Hebei University of Engineering, 2019. (李明轩. 粒化高炉矿渣代砂配制混凝土的试验研究[D]. 邯郸: 河北工程大学, 2019.LI M X. Experimental study of granulated blast furnace slag as fineaggregate concrete[D]. Handan: Hebei University of Engineering, 2019. [11] HUANG X, JIANG J S, SUN T Y, et al. Orthogonal experiment on mechanical properties of basalt fiber-carbon fiber/slag concrete[J]. Acta Materiae Compositae Sinica, 2020, 37(7): 1743-1753. (黄鑫, 姜景山, 孙天洋, 等. 玄武岩-碳纤维/矿渣混凝土力学性能正交试验[J]. 复合材料学报, 2020, 37(7): 1743-1753.HUANG X, JIANG J S, SUN T Y, et al. Orthogonal experiment on mechanical properties of basalt fiber-carbon fiber/slag concrete[J]. Acta Materiae Compositae Sinica, 2020, 37(7): 1743-1753. [12] SALIHI A, ARPITHA D, RAJASEKARAN C. Suitability study of processed granulated blast furnace slag (PGBS) as fine aggregate replacement in mortar exposed to the marine environment[J]. Materials Today: Proceedings, 2023, 88: 1-5. doi: 10.1016/j.matpr.2023.04.351 [13] SHI D S, LI X X, ZHANG P, et al. Experimental study on granulated blast furnace slag asfine aggregate self-compacting concrete[J]. Iron Steel Vanadium Titanium, 2024, 45(2): 108-114. (石东升, 李行行, 张鹏, 等. 粒化高炉矿渣作细骨料自密实混凝土试验研究[J]. 钢铁钒钛, 2024, 45(2): 108-114. doi: 10.7513/j.issn.1004-7638.2024.02.016SHI D S, LI X X, ZHANG P, et al. Experimental study on granulated blast furnace slag asfine aggregate self-compacting concrete[J]. Iron Steel Vanadium Titanium, 2024, 45(2): 108-114. doi: 10.7513/j.issn.1004-7638.2024.02.016 [14] LI T P, TAN J, AN Y, et al. Research progress in mechanical properties of basalt fiber reinforced composites[J]. New Chemical Materials, 2024, 52(2): 16-19,25. (李天平, 谭晶, 安瑛, 等. 玄武岩纤维增强复合材料力学性能的研究进展[J]. 化工新型材料, 2024, 52(2): 16-19,25. doi: 10.19817/j.cnki.issn1006-3536.2024.02.016LI T P, TAN J, AN Y, et al. Research progress in mechanical properties of basalt fiber reinforced composites[J]. New Chemical Materials, 2024, 52(2): 16-19,25. doi: 10.19817/j.cnki.issn1006-3536.2024.02.016 [15] XIE L, SUN X J, YU Z P, et al. Experimental study and theoretical analysis on dynamic mechanical properties of basalt fiber reinforced concrete[J]. Journal of Building Engineering, 2022, 62: 105334. doi: 10.1016/j.jobe.2022.105334 [16] TAHWIA A M, HELAL K A, YOUSSF O. Chopped basalt fiber-reinforced high-performance concrete: An experimental and analytical study[J]. Journal of Composites Science, 2023, 7(6): 250. doi: 10.3390/jcs7060250 [17] XIONG W, QIN S H, PENG D D, et al. Numerical simulation of basalt fiber concrete based on 3D mesoscale model[J]. Journal of Architecture and Civil Engineering, 2024, 41(1): 181-190. (熊汪, 覃书豪, 彭定东, 等. 基于三维细观模型的玄武岩纤维混凝土数值模拟[J]. 建筑科学与工程学报, 2024, 41(1): 181-190. doi: 10.19815/j.jace.2022.04091XIONG W, QIN S H, PENG D D, et al. Numerical simulation of basalt fiber concrete based on 3D mesoscale model[J]. Journal of Architecture and Civil Engineering, 2024, 41(1): 181-190. doi: 10.19815/j.jace.2022.04091 [18] YANG H, LIANG H Z, DIE J, et al. Mechanical properties of high titanium heavy slag fiber-reinforced concrete[J]. Iron Steel Vanadium Titanium, 2020, 41(2): 69-74. (杨贺, 梁贺之, 迭健, 等. 高钛重矿渣纤维混凝土力学性能试验研究[J]. 钢铁钒钛, 2020, 41(2): 69-74.YANG H, LIANG H Z, DIE J, et al. Mechanical properties of high titanium heavy slag fiber-reinforced concrete[J]. Iron Steel Vanadium Titanium, 2020, 41(2): 69-74. [19] YANG Z Y, LU F, ZHAN X W, et al. Mechanical properties and mesoscopic damage characteristics of basalt fibre-reinforced seawater sea-sand slag-based geopolymer concrete[J]. Journal of Building Engineering, 2024, 84: 108688. doi: 10.1016/j.jobe.2024.108688 [20] KRASSOWSKA J. Fracture behavior and mechanical properties of basalt chopped fibers and minibars fiber-reinforced concrete[J]. Structures, 2025, 75: 108808. doi: 10.1016/j.istruc.2025.108808 [21] YAN X Y, LUO F B, JIN X H, et al. Static and dynamic mechanical properties of basalt fiber-reinforced concrete and polyethylene fiber-reinforced concrete[J]. Journal of Building Materials, 2025, 28(9): 825-833. (颜学渊, 罗福斌, 金贤洪, 等. 玄武岩纤维混凝土和聚乙烯纤维混凝土静动态力学性能[J]. 建筑材料学报, 2025, 28(9): 825-833. doi: 10.3969/j.issn.1007-9629.2025.09.001YAN X Y, LUO F B, JIN X H, et al. Static and dynamic mechanical properties of basalt fiber-reinforced concrete and polyethylene fiber-reinforced concrete[J]. Journal of Building Materials, 2025, 28(9): 825-833. doi: 10.3969/j.issn.1007-9629.2025.09.001 [22] WU Q Y, MA Q Y, WANG Y. Compression-tensile tests and meso-structure of basalt fiber-slag powder-fly ashconcrete under freeze-thaw cycles[J]. Acta Materiae Compositae Sinica, 2021, 38(3): 953-965. (吴倩云, 马芹永, 王莹. 冻融循环作用下玄武岩纤维-矿渣粉-粉煤灰混凝土压拉强度试验与细观结构[J]. 复合材料学报, 2021, 38(3): 953-965. doi: 10.13801/j.cnki.fhclxb.20200722.002WU Q Y, MA Q Y, WANG Y. Compression-tensile tests and meso-structure of basalt fiber-slag powder-fly ashconcrete under freeze-thaw cycles[J]. Acta Materiae Compositae Sinica, 2021, 38(3): 953-965. doi: 10.13801/j.cnki.fhclxb.20200722.002 [23] MIN W L, JIN W L, HE X Y, et al. Experimental study on the flexural fatigue performance of slag/fly ash geopolymer concrete reinforced with modified basalt and PVA hybrid fibers[J]. Journal of Building Engineering, 2024, 94: 109917. doi: 10.1016/j.jobe.2024.109917 [24] RONG X, YAN Y L, CHEN P, et al. Impact resistance performance of basalt fiber reinforced alkali-activated slag cementitious material[J]. Concrete, 2025(11): 59-63,69. (戎贤, 严亚隆, 陈庞, 等. 玄武岩纤维增韧碱矿渣胶凝材料抗冲击性能[J]. 混凝土, 2025(11): 59-63,69.RONG X, YAN Y L, CHEN P, et al. Impact resistance performance of basalt fiber reinforced alkali-activated slag cementitious material[J]. Concrete, 2025(11): 59-63,69. [25] LIU J L, GUO G L, WANG X F, et al. Investigation of mechanical properties of recycled aggregate concrete incorporating basalt fiber, copper slag, and ground granulated blast furnace slag[J]. Buildings, 2025, 15(13): 2214. doi: 10.3390/buildings15132214 [26] LI X X, SHI D S, SUN S J, et al. Research review on properties and resource utilization of granulated blast furnace slag fine aggregate concrete[J]. Multipurpose Utilization of Mineral Resources, 2023(12): 39-45. (李行行, 石东升, 孙尚杰, 等. 粒化高炉矿渣细骨料混凝土性能与资源化研究评述[J]. 矿产综合利用, 2023(12): 39-45.LI X X, SHI D S, SUN S J, et al. Research review on properties and resource utilization of granulated blast furnace slag fine aggregate concrete[J]. Multipurpose Utilization of Mineral Resources, 2023(12): 39-45. [27] HUANG J C, CHEN H K. The influence of basalt fiber length on the mechanical properties and frost resistance of concrete[J]. Journal of Functional Materials, 2025, 56(3): 3194-3201. (黄杰超, 陈洪科. 玄武岩纤维长度对混凝土力学性能和抗冻性能的影响[J]. 功能材料, 2025, 56(3): 3194-3201. doi: 10.3969/j.issn.1001-9731.2025.03.025HUANG J C, CHEN H K. The influence of basalt fiber length on the mechanical properties and frost resistance of concrete[J]. Journal of Functional Materials, 2025, 56(3): 3194-3201. doi: 10.3969/j.issn.1001-9731.2025.03.025 [28] ZHANG G H, GU D J, XIE J D, et al. Experimental study on enhancement effect of basalt fibers on early-age splitting tensile strength of low-heat cement concrete[J]. Advances in Science and Technology of Water Resources, 2025, 45(6): 47-52,60. (张国辉, 顾德锦, 谢金东, 等. 玄武岩纤维对低热水泥混凝土早龄期劈拉强度的提升效果试验研究[J]. 水利水电科技进展, 2025, 45(6): 47-52,60. doi: 10.3880/j.issn.1006-7647.2025.06.007ZHANG G H, GU D J, XIE J D, et al. Experimental study on enhancement effect of basalt fibers on early-age splitting tensile strength of low-heat cement concrete[J]. Advances in Science and Technology of Water Resources, 2025, 45(6): 47-52,60. doi: 10.3880/j.issn.1006-7647.2025.06.007 [29] QIN S H, WU L. Study on mechanical properties and mechanism of new basalt fiber reinforced concrete[J]. Case Studies in Construction Materials, 2025, 22: e04290. doi: 10.1016/j.cscm.2025.e04290 [30] WANG P, KE L Y W, WU H L, et al. Effects of water-to-cement ratio on the performance of concrete and embedded GFRP reinforcement[J]. Construction and Building Materials, 2022, 351: 128833. doi: 10.1016/j.conbuildmat.2022.128833 [31] YUAN L W. In fluence of cement and supplementary cementious materials properties on the intrinsic self-healing ability of cement based materials[D]. Jinan: University of Jinan, 2021. (袁连旺. 水泥及掺合料特性对水泥基材料本征自修复能力的影响[D]. 济南: 济南大学, 2021.YUAN L W. In fluence of cement and supplementary cementious materials properties on the intrinsic self-healing ability of cement based materials[D]. Jinan: University of Jinan, 2021. [32] ZHANG X L, WANG W, YAO A J, et al. Properties of composite cementitious materials under low temperature and low pressure curing conditions[J]. Bulletin of the Chinese Ceramic Society, 2025, 44(9): 3295-3304. (张小龙, 王伟, 姚爱军, 等. 低温低压养护条件下复合胶凝材料性能研究[J]. 硅酸盐通报, 2025, 44(9): 3295-3304. doi: 10.16552/j.cnki.issn1001-1625.2025.0280ZHANG X L, WANG W, YAO A J, et al. Properties of composite cementitious materials under low temperature and low pressure curing conditions[J]. Bulletin of the Chinese Ceramic Society, 2025, 44(9): 3295-3304. doi: 10.16552/j.cnki.issn1001-1625.2025.0280 [33] JIANG C M, XIA L, LI S X, et al. Impact of ground granulated blast furnace slag on calcium leaching of low-heat portland cement paste[J]. Materials, 2024, 17(15): 3857. doi: 10.3390/ma17153857 -
下载: