Properties and Micro-Pore Structure of Manufactured Sand Concrete with Different MB Values

Abstract

Abstract: By controlling the content of mud powder, different methylene blue (MB) values were measured. The influence of different MB values on the mechanical properties of manufactured sand concrete was studied, and the relationship between pore structure characteristics and mechanical properties was analyzed. The grey relational entropy was introduced to establish the relationship model between pore structure and pore size category of manufactured sand concrete and compressive strength. The results show that the working performance of manufactured sand concrete gradually deteriorates with the increase of MB value. The compressive strength and splitting tensile strength of manufactured sand concrete increase first and then decrease with the increase of MB value. The maximum value occurs at MB value of 1.10 at 28 d, At this time, the T₂ spectrum area, porosity, bound fluid saturation and the proportion of harmful pores above 100 nm of manufactured sand concrete reach the minimum. The free fluid saturation and the proportion of harmful pores below 100 nm increase first and then decrease, reaching the maximum when MB value is 1.10, and then the proportion decreases with the increase of MB value, reaching the minimum when MB value is 2.00. By introducing the grey entropy correlation degree, it is concluded that the saturation of the bound fluid and the harmless hole has the greatest correlation degree with the compressive strength, and on this basis, the GM(1,3) model is established. The average relative errors between the model prediction value and the experimental value at 7 and 28 d are 0.47% and 0.26%, respectively.

Key words: MB value, manufactured sand concrete, mud powder, mechanical property, grey entropy correlation degree, pore structure

CLC Number:

TU528

GE Chenglong, ZHOU Hailong, CHEN Yan, LYU Zhigang. Properties and Micro-Pore Structure of Manufactured Sand Concrete with Different MB Values[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(3): 888-897.

References

[1] 徐志华, 邓俊双, 刘战鳌, 等. 机制砂中细粉MB值对混凝土性能影响规律的研究[J]. 武汉理工大学学报(交通科学与工程版), 2021, 45(6): 1151-1157.
XU Z H, DENG J S, LIU Z A, et al. Study on the influence law of MB value of microfines in manufactured sand on concrete performances[J]. Journal of Wuhan University of Technology (Transportation Science & Engineering), 2021, 45(6): 1151-1157 (in Chinese).
[2] 李先海, 张覃, 卯松, 等. 赤泥和磷渣调控水泥混凝土界面过渡区微结构的研究[J]. 硅酸盐通报, 2019, 38(12): 3946-3951.
LI X H, ZHANG Q, MAO S, et al. Effects of red mud and phosphorous slag on interfacial transition zone microstructure of cement concrete[J]. Bulletin of the Chinese Ceramic Society, 2019, 38(12): 3946-3951 (in Chinese).
[3] 巨浩波, 吕生华, 刘晶晶. 砂石质量对混凝土性能影响的研究进展[J]. 硅酸盐通报, 2013, 32(12): 2538-2543+2549.
JU H B, LV S H, LIU J J. Research progress on effect of aggregate quality on concrete performance[J]. Bulletin of the Chinese Ceramic Society, 2013, 32(12): 2538-2543+2549 (in Chinese).
[4] 袁杰, 范永德, 葛勇, 等. 含泥量对高性能混凝土耐久性能的影响[J]. 混凝土, 2003(8): 31-33.
YUAN J, FAN Y D, GE Y, et al. Effect of sediment content on durability of high performance concrete[J]. Concrete, 2003(8): 31-33 (in Chinese).
[5] CHEN X, GUO Y G, LI B, et al. Coupled effects of the content and methylene blue value (MBV) of microfines on the performance of manufactured sand concrete[J]. Construction and Building Materials, 2020, 240: 117953.
[6] 郭猛, 杨杰, 黄鹏宇, 等. 花岗岩机制砂石粉MB值对混凝土性能的影响[J]. 新型建筑材料, 2022, 49(4): 76-80.
GUO M, YANG J, HUANG P Y, et al. Effect of MB value of granite-made sand powder on concrete performance[J]. New Building Materials, 2022, 49(4): 76-80 (in Chinese).
[7] 王稷良. 机制砂特性对混凝土性能的影响及机理研究[D]. 武汉: 武汉理工大学, 2008.
WANG J L. Research of effects and mechanism of manufactured sand characteristics on Portland cement concrete[D]. Wuhan: Wuhan University of Technology, 2008 (in Chinese).
[8] 夏京亮, 高彦鹏, 张鹏翔, 等. 机制砂MB值对混凝土电通量和氯离子扩散系数的影响[J]. 建筑科学, 2021, 37(3): 78-84.
XIA J L, GAO Y P, ZHANG P X, et al. Effect of machine sand MB value on electric flux and chloride diffusion coefficient of concrete[J]. Building Science, 2021, 37(3): 78-84 (in Chinese).
[9] 王建国, 周海龙, 葛成龙, 等. 石粉对高强机制砂混凝土工作性能和力学性能的影响[J]. 排灌机械工程学报, 2021, 39(8): 804-810.
WANG J G, ZHOU H L, GE C L, et al. Influence of stone powder on working and mechanical properties of high-strength manufactured sand concrete[J]. Journal of Drainage and Irrigation Machinery Engineering, 2021, 39(8): 804-810 (in Chinese).
[10] 李波, 周海龙, 梁玉婧, 等. 偏高岭土对高强机制砂混凝土性能的影响[J]. 排灌机械工程学报, 2021, 39(11): 1154-1160.
LI B, ZHOU H L, LIANG Y J, et al. Effect of metakaolin content on performance of high strength manufactured sand concrete[J]. Journal of Drainage and Irrigation Machinery Engineering, 2021, 39(11): 1154-1160 (in Chinese).
[11] 于本田, 陈延飞, 王焕, 等. 大掺量高吸附性石粉高强机制砂混凝土收缩开裂抑制试验[J]. 复合材料学报, 2021, 38(8): 2737-2746.
YU B T, CHEN Y F, WANG H, et al. Experiment on control measures of shrinkage and cracking of high strength manufactured sand concrete containing a large amount of high absorbency stone powder[J]. Acta Materiae Compositae Sinica, 2021, 38(8): 2737-2746 (in Chinese).
[12] JIN S S, ZHANG J X, HAN S. Fractal analysis of relation between strength and pore structure of hardened mortar[J]. Construction and Building Materials, 2017, 135: 1-7.
[13] BU J, TIAN Z. Relationship between pore structure and compressive strength of concrete: experiments and statistical modeling[J]. Sādhanā, 2016, 41(3): 337-344.
[14] 郭剑飞. 混凝土孔结构与强度关系理论研究[D]. 杭州: 浙江大学, 2004.
GUO J F. The theoretical research of the pore structure and strength of concrete[D]. Hangzhou: Zhejiang University, 2004 (in Chinese).
[15] LIAN C, ZHUGE Y, BEECHAM S. The relationship between porosity and strength for porous concrete[J]. Construction and Building Materials, 2011, 25(11): 4294-4298.
[16] 柯国炬, 卢忠飞, 郝以党, 等. 路面机制砂水泥混凝土耐磨性影响因素灰色关联分析[J]. 硅酸盐通报, 2011, 30(1): 216-219.
KE G J, LU Z F, HAO Y D, et al. Gray relation analysis in influential factors of abrasion resistance of pavement manufactured sand cement concrete[J]. Bulletin of the Chinese Ceramic Society, 2011, 30(1): 216-219 (in Chinese).
[17] 刘红瑛. 影响沥青混凝土水稳定性的灰关联熵分析[J]. 长安大学学报(自然科学版), 2003, 23(6): 7-10.
LIU H Y. Grey relation entropy method to analyze moisture stability of asphalt concrete[J]. Journal of Chang’an University (Natural Science Edition), 2003, 23(6): 7-10 (in Chinese).
[18] 刘倩, 申向东, 董瑞鑫, 等. 孔隙结构对风积沙混凝土抗压强度影响规律的灰熵分析[J]. 农业工程学报, 2019, 35(10): 108-114.
LIU Q, SHEN X D, DONG R X, et al. Grey entropy analysis on effect of pore structure on compressive strength of aeolian sand concrete[J]. Transactions of the Chinese Society of Agricultural Engineering, 2019, 35(10): 108-114 (in Chinese).
[19] DE J CANO-BARRITA P F, CASTELLANOS F, RAMÍREZ-ARELLANES S, et al. Monitoring compressive strength of concrete by nuclear magnetic resonance, ultrasound, and rebound hammer[J]. ACI Materials Journal, 2015, 112(1): 147-154.
[20] 刘卫, 邢立, 孙佃庆, 等. 核磁共振录井[M]. 北京: 石油工业出版社, 2011.
LIU W, XING L, SUN D Q, et al. Nuclear magnetic resonance logging[M]. Beijing: Petroleum Industry Press, 2011 (in Chinese).
[21] DAVIES S, KALAM M Z, PACKER K J, et al. Pore-size distributions from nuclear magnetic resonance spin-lattice relaxation measurements of fluid-saturated porous solids. II. Applications to reservoir core samples[J]. Journal of Applied Physics, 1990, 67(6): 3171-3176.
[22] 张承志. 商品混凝土[M]. 北京: 化学工业出版社, 2006: 110-111.
ZHANG C Z. Commercial concrete[M]. BeiJing: Chemical Industry Publishing House, 2006: 110-111 (in Chinese).
[23] 李彰明, 曾文秀, 高美连. 不同荷载水平及速率下超软土水相核磁共振试验研究[J]. 物理学报, 2014, 63(1): 018202.
LI Z M, ZENG W X, GAO M L. Nuclear magnetic resonance test and analysis on water phase of the ultra-soft soil under different load level and rate[J]. Acta Physica Sinica, 2014, 63(1): 018202 (in Chinese).
[24] 王稷良, 王在杭, 宋国林, 等. 机制砂MB值对路面混凝土抗盐冻性能的影响及机理研究[J]. 公路交通科技, 2016, 33(8): 31-36.
WANG J L, WANG Z H, SONG G L, et al. Study on effect of MB value of manufactured sand on salt-freeze resistance of pavement concrete and its mechanism[J]. Journal of Highway and Transportation Research and Development, 2016, 33(8): 31-36 (in Chinese).
[25] 秦丹. 泥粉中矿物组成和含量对水泥水化及混凝土性能的影响[D]. 重庆: 重庆大学, 2021.
QIN D. Effect of minerals composition and content in clay powder on cement hydration and concrete properties[D]. Chongqing: Chongqing University, 2021 (in Chinese).
[26] 吴中伟, 张鸿直. 膨胀混凝土[M]. 北京: 中国铁道出版社, 1990.
WU Z W, ZHANG H Z. Expanded concrete[M]. Beijing: China Railway Publishing House, 1990 (in Chinese).
[27] 祝斯月, 陈拴发, 秦先涛, 等. 基于灰关联熵分析法的高粘改性沥青关键指标[J]. 材料科学与工程学报, 2014, 32(6): 863-867.
ZHU S Y, CHEN S F, QIN X T, et al. Key indexes of high viscosity modified asphalt based on grey correlation entropy analysis[J]. Journal of Materials Science and Engineering, 2014, 32(6): 863-867 (in Chinese).
[28] 刘思峰, 杨英杰, 吴利丰, 等. 灰色系统理论及其应用[M]. 北京: 科学出版社, 2014.
LIU S F, YANG Y J, WU L F, et al. Gray system theory and its applications[M]. Beijing: Science Press, 2014 (in Chinese).