矿渣掺量对热养护粉煤灰基地聚物收缩和抗压强度的影响及机理分析

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (12): 4389-4398.

矿渣掺量对热养护粉煤灰基地聚物收缩和抗压强度的影响及机理分析

郭红丽¹, 白鹏翔¹, 洪淼¹, 朱飞鹏¹, 胡丰¹, 雷冬^1,2

1.河海大学力学与材料学院,南京 211000;
2.河海大学苏州研究院,苏州 215100

收稿日期:2023-06-30 修订日期:2023-08-30 出版日期:2023-12-15 发布日期:2023-12-12
通信作者: 白鹏翔,博士,高级实验师。E-mail:baipengxiang@hhu.edu.cn
作者简介:郭红丽(1996—),女,硕士研究生。主要从事早龄期地聚物方面的研究。E-mail:guohongli_hhu@foxmail.com
基金资助:
河海大学大型仪器设备共享基金(GX202206B);苏州市科技发展计划(SYC2022080)

Effect and Mechanism Analysis of Slag Content on Shrinkage and Compressive Strength of Thermal Curing Fly Ash-Based Geopolymer

GUO Hongli¹, BAI Pengxiang¹, HONG Miao¹, ZHU Feipeng¹, HU Feng¹, LEI Dong^1,2

1. College of Mechanics and Materials, Hohai University, Nanjing 211000, China;
2. Suzhou Research Institute, Hohai University, Suzhou 215100, China

Received:2023-06-30 Revised:2023-08-30 Online:2023-12-15 Published:2023-12-12

摘要/Abstract

摘要： 本文通过数字图像相关(DIC)方法研究了0%、10%、20%、30%、40%、50%六种矿渣掺量(质量分数,下同)对粉煤灰基地聚物(FAGP)混凝土热养护过程中收缩的影响,测试了热养护后混凝土和净浆的抗压强度,并且结合同步热分析(TGA-DSC)、X射线衍射(XRD)和扫描电子显微镜(SEM)对微观机理进行了分析。结果表明:随着矿渣掺量的增加,FAGP的收缩量和收缩速率均先减小后增大,抗压强度先增大后减小,水化程度增大,微裂缝数量增加;当矿渣掺量为40%时,FAGP混凝土的收缩量最小,抗压强度最大;当矿渣掺量较低时,地聚物水化程度小,微裂缝少,地聚物收缩的主要原因是热养护初期的弹性模量较低;当矿渣掺量较高时,地聚物水化程度大,微裂缝较多,地聚物收缩主要由较强烈的化学反应引起。

Abstract: The effects of six slag dosages of 0%, 10%, 20%, 30%, 40% and 50% (mass fraction, the same below) on the shrinkage of fly ash-based geopolymer (FAGP) concrete during thermal curing process were studied with digital image correlation (DIC) method. The compressive strength of concrete and paste after thermal curing were tested, and the microscopic mechanism was analyzed by combining simultaneous thermal analysis (TG-DSC), X-ray diffraction (XRD) and scanning electron microscope (SEM). The results show that with the increase of slag content, the total shrinkage and shrinkage rate of FAGP first decrease and then increase, the compressive strength increases first and then decreases, the hydration degree increases, and the number of microcracks increases. When the slag content is 40%, FAGP concrete has the smallest shrinkage and the highest compressive strength. When the slag content is low, the hydration degree of the geopolymer is small, and there are fewer microcracks. At this time, the main reason for the shrinkage of the geopolymer is the lower elastic modulus at the beginning of thermal curing. When the slag content is high, the hydration degree of the geopolymer is high, and there are many microcracks. At this time, the shrinkage deformation of the geopolymer is mainly caused by a large degree of chemical reaction.

Key words: digital image correlation method, slag, fly ash-based geopolymer, thermal curing, deformation, compressive strength

中图分类号:

TU528.01

郭红丽, 白鹏翔, 洪淼, 朱飞鹏, 胡丰, 雷冬. 矿渣掺量对热养护粉煤灰基地聚物收缩和抗压强度的影响及机理分析[J]. 硅酸盐通报, 2023, 42(12): 4389-4398.

GUO Hongli, BAI Pengxiang, HONG Miao, ZHU Feipeng, HU Feng, LEI Dong. Effect and Mechanism Analysis of Slag Content on Shrinkage and Compressive Strength of Thermal Curing Fly Ash-Based Geopolymer[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(12): 4389-4398.

参考文献

[1] DING J, MA S H, SHEN S, et al. Research and industrialization progress of recovering alumina from fly ash: a concise review[J]. Waste Management, 2017, 60: 375-387.
[2] GAO X, YU Q L, BROUWERS H J H. Assessing the porosity and shrinkage of alkali activated slag-fly ash composites designed applying a packing model[J]. Construction and Building Materials, 2016, 119: 175-184.
[3] KHAN M S H, CASTEL A, AKBARNEZHAD A, et al. Utilisation of steel furnace slag coarse aggregate in a low calcium fly ash geopolymer concrete[J]. Cement and Concrete Research, 2016, 89: 220-229.
[4] PARATHI S, NAGARAJAN P, PALLIKKARA S A. Ecofriendly geopolymer concrete: a comprehensive review[J]. Clean Technologies and Environmental Policy, 2021, 23(6): 1701-1713.
[5] SOUTSOS M, BOYLE A P, VINAI R, et al. Factors influencing the compressive strength of fly ash based geopolymers[J]. Construction and Building Materials, 2016, 110: 355-368.
[6] HOJATI M, RADLIN＇SKA A. Shrinkage and strength development of alkali-activated fly ash-slag binary cements[J]. Construction and Building Materials, 2017, 150: 808-816.
[7] LEE N K, JANG J G, LEE H K. Shrinkage characteristics of alkali-activated fly ash/slag paste and mortar at early ages[J]. Cement and Concrete Composites, 2014, 53: 239-248.
[8] RADLIŃSKA A, YOST J R, SALERA M J. Material properties of structurally viable alkali-activated fly ash concrete[J]. Journal of Materials in Civil Engineering, 2013, 25(10): 1456-1464.
[9] LEE N K, LEE H K. Setting and mechanical properties of alkali-activated fly ash/slag concrete manufactured at room temperature[J]. Construction and Building Materials, 2013, 47: 1201-1209.
[11] VERMA M, DEV N. Effect of liquid to binder ratio and curing temperature on the engineering properties of the geopolymer concrete[J]. Silicon, 2022, 14(4): 1743-1757.
[12] NOUSHINI A, BABAEE M, CASTEL A. Suitability of heat-cured low-calcium fly ash-based geopolymer concrete for precast applications[J]. Magazine of Concrete Research, 2016, 68(4): 163-177.
[13] YAO X, YANG T, ZHANG Z H. Compressive strength development and shrinkage of alkali-activated fly ash-slag blends associated with efflorescence[J]. Materials Structure, 2016, 49: 2907-2918.
[14] ZHANG W Y, ZAKARIA M, HAMA Y. Influence of aggregate materials characteristics on the drying shrinkage properties of mortar and concrete[J]. Construction and Building Materials, 2013, 49: 500-510.
[15] 陈登旭. 基于数字图像相关技术的高温材料形变测量[D]. 太原: 中北大学, 2021.
CHEN D X. Deformation measurement of high temperature materials based on digital image correlation technology[D]. Taiyuan: North University of China, 2021 (in Chinese).
[16] ZHANG J R, FU Y, WANG A, et al. Research on the mechanical properties and microstructure of fly ash-based geopolymers modified by molybdenum tailings[J]. Construction and Building Materials, 2023, 385: 131530.
[17] LEE N K, JANG J G, LEE H K. Shrinkage characteristics of alkali-activated fly ash/slag paste and mortar at early ages[J]. Cement and Concrete Composites, 2014, 53: 239-248.
[18] TRINCAL V, MULTON S, BENAVENT V, et al. Shrinkage mitigation of metakaolin-based geopolymer activated by sodium silicate solution[J]. Cement and Concrete Research, 2022, 162: 106993.
[19] CHEN W W, LI B, GUO M Z, et al. Impact of heat curing regime on the compressive strength and drying shrinkage of alkali-activated slag mortar[J]. Developments in the Built Environment, 2023, 14: 100123.

[1]	黎帅, 周凤娇, 谭新宇, 张宾, 林永权, 陶从喜, 黄明俊. 二氧化碳浓度对低钙固碳胶凝材料性能影响及机理研究[J]. 硅酸盐通报, 2023, 42(9): 3109-3116.
[2]	韦亚平, 李绍成, 王有志, 田长进. 多尺度MgO膨胀剂与SAP协同作用对UHPC力学及收缩性能的影响[J]. 硅酸盐通报, 2023, 42(9): 3154-3165.
[3]	贠建洲, 陈顺超, 郑维龙, 聂良鹏, 袁胜涛. 龄期对超声回弹综合法检测混凝土构件的误差影响[J]. 硅酸盐通报, 2023, 42(9): 3166-3175.
[4]	刘扬, 肖欣欣, 陈湘, 王柏文, 罗冬, 鲁乃唯. 电石渣对碱激发粉煤灰-矿渣抗碳化性能的影响[J]. 硅酸盐通报, 2023, 42(9): 3204-3211.
[5]	潘荣祥, 杨敏, 袁宏. 减水剂对赤泥-粉煤灰基地质聚合物性能的影响[J]. 硅酸盐通报, 2023, 42(9): 3212-3220.
[6]	童小根, 张凯峰, 孟刚, 朱王科, 王敏, 付万长. 金尾矿复合砂对不同强度等级混凝土性能的影响[J]. 硅酸盐通报, 2023, 42(9): 3231-3239.
[7]	张涛, 王腾, 张琰, 谭洪波, 刘佳龙, 董超. 矿渣微粉对水泥净浆性能及氯离子固化作用的影响[J]. 硅酸盐通报, 2023, 42(9): 3240-3247.
[8]	邱伟, 孔德文, 崔庚寅, 黄莹蓥, 王玲玲. 偏高岭土-磷石膏基复合胶凝材料性能试验研究[J]. 硅酸盐通报, 2023, 42(9): 3267-3276.
[9]	杨医博, 梁宋梭, 刘福财, 谢锐, 欧锦盛, 郭文瑛, 王恒昌. 低吸水率陶瓷再生砂对砂浆力学和干燥收缩性能的影响及机理研究[J]. 硅酸盐通报, 2023, 42(9): 3277-3285.
[10]	裴天蕊, 齐冬有, 邹德麟, 蔡永慧, 汪智勇, 郝禄禄, 王亚丽, 张钰, 刘洪印. 矿渣-高贝利特硫铝酸盐水泥抗硫酸盐侵蚀机理的研究[J]. 硅酸盐通报, 2023, 42(8): 2683-2691.
[11]	曾柯林, 温东昌, 杨蓉, 孙涛, 王雷冲, 韩金龙. 水化热抑制剂对复合胶凝材料体系早期水化动力学的影响[J]. 硅酸盐通报, 2023, 42(8): 2712-2721.
[12]	褚洪岩, 安圆圆, 秦健健, 蒋金洋. 轻质高性能混凝土力学性能及微观结构研究[J]. 硅酸盐通报, 2023, 42(8): 2722-2732.
[13]	冯玉钏, 贾小龙, 惠迎新, 韩方元, 万磊. 母岩类型及石粉含量对机制砂混凝土性能影响研究[J]. 硅酸盐通报, 2023, 42(8): 2773-2780.
[14]	武业忱, 吕恒林, 章明明, 闫启耀, 闫慧, 戚传康. 复合石灰石粉-粉煤灰-矿渣混凝土抗冻融性能研究[J]. 硅酸盐通报, 2023, 42(8): 2808-2820.
[15]	罗哲, 黄敦文, 彭晖. 碱激发偏高岭土-矿渣砂浆的碱骨料反应机理研究[J]. 硅酸盐通报, 2023, 42(8): 2830-2836.