5~31.5 mm和5~40 mm粗骨料粒径对水工混凝土性能影响研究Effects of 5~31.5 mm and 5~40 mm coarse aggregate size on the properties of hydraulic concrete
高怀振,夏求林,李明霞,李盼盼,蒋文广,王世美,刘恒
摘要(Abstract):
依托引江济淮工程,研究了5~31.5 mm和5~40 mm两种粗骨料粒径对混凝土工作性能、力学性能和变形性能的影响。结果显示:采用5~31.5 mm粗骨料粒径的混凝土用水量比采用5~40 mm粗骨料粒径制备的混凝土高3~4 kg/m~3,但混凝土拌合物性能整体上无明显差异;与5~40 mm骨料制备混凝土相比,采用5~31.5 mm骨料制备C25和C30混凝土90 d龄期的抗压强度分别提高了1.8 MPa和1.1 MPa,劈拉强度分别提高了0.17 MPa和0.28 MPa,极限拉伸值分别提高了6×10~(-6)和5×10~(-6),混凝土的弹性模量差异较小;与5~40 mm骨料制备混凝土相比,采用5~31.5 mm骨料制备C25和C30混凝土90 d龄期的干缩分别增大22×10~(-6)和15×10~(-6),360 d龄期的自生体积变形增大3×10~(-6)和4×10~(-6)。结果表明:采用5~31.5 mm粗骨料粒径的混凝土用水量和胶材用量略有增大,致使混凝土的力学性能和变形性能增大,能够满足粗骨料粒径为5~40 mm的水工混凝土力学性能要求,有效解决了水利工程建设中粗骨料获取来源不足的现实问题,但应关注变形性能增大可能导致混凝土开裂的问题。
关键词(KeyWords): 粗骨料粒径;工作性能;力学性能;变形性能
基金项目(Foundation): 长江科学院中央级公益性科研院所基金(CKSF2019507/CL);长江科学院中央级公益性科研院所基金(CKSF2023304/CL);; 安徽省引江济淮集团有限公司科技项目(YJJH-ZT-ZX-20210408381)
作者(Author): 高怀振,夏求林,李明霞,李盼盼,蒋文广,王世美,刘恒
DOI: 10.13928/j.cnki.wrahe.2024.S1.074
参考文献(References):
- [1] DATTA S D,SOBUZ M H R,AKID A S M,et al.Influence of coarse aggregate size and content on the properties of recycled aggregate concrete using non-destructive testing methods[J].Journal of Building Engineering,2022,61:105249.
- [2] BOUKAIS A,DAHOU Z,MATALLAH M.Maximum aggregate size effects on the evolution of the FPZ and crack extensions in concrete:experimental and numerical investigation[J].International Journal of Solids and Structures,2023,269:112181.
- [3] 荆帅召,杨鑫,周昌巧,等.骨料级配对水工全级配和湿筛混凝土拉伸断裂性能差异的影响[J].三峡大学学报(自然科学版),2018,40(6):11-15.
- [4] DATTA S D,SOBUZ M H R,AKID A S M,et al.Influence of coarse aggregate size and content on the properties of recycled aggregate concrete using non-destructive testing methods[J].Journal of Building Engineering,2022,61:105249.
- [5] 邢斌,张戎令.高性能混凝土粗骨料碎卵石破碎面研究[J].混凝土,2011(12):90-93.
- [6] 陈威.桃源水电站超硬砂砾石制砂工艺设计与运行[J].水力发电,2014,40(6):62-64.
- [7] AYODELE F,OLULOPE O R,AYENI I .Short-term study of the influence of aggregate size on the fire resistance of concrete[J].Nigerian Journal of Technological Development,2023.
- [8] FAZLI H,YAN D,ZHANG Y,et al.Influence of coarse aggregate size on the bonding between CFRP Sheets and Metakaolin-based geopolymer concrete and ordinary concrete[J].Journal of composites for construction,2022(2):26.
- [9] ALI R,MUAYAD M,MOHAMMED A S,et al.Analysis and prediction of the effect of Nanosilica on the compressive strength of concrete with different mix proportions and specimen sizes using various numerical approaches[J].Structural Concrete:Journal of the FIB,2023.
- [10] 吴火兵.二级配混凝土扩大粗骨料粒径试验研究[J].四川水力发电,2020,39(4):100-102.
- [11] 韩炎.粗骨料粒径对水工混凝土性能影响研究[J].江淮水利科技,2022(5):1-4,22.
- [12] 李树山,高丹盈.粗骨料粒径对卵石混凝土抗压强度影响的试验研究[J].混凝土,2013(2):59-61,64.
- [13] 林辰,金贤玉,李宗津.粗骨料粒径和硅灰对混凝土断裂性能影响的试验研究[J].混凝土,2004(10):32-34.
- [14] 杜敏,金浏,李冬,等.粗骨料粒径对混凝土弯拉强度尺寸效应影响的试验研究[J].北京工业大学学报,2016,42(6):912-918.
- [15] 吕兴栋,和超,夏求林,等.高含泥人工砂不同清洗方式对混凝土性能影响研究[J/OL].水利水电技术(中英文):1-10[2024-01-10].http://kns.cnki.net/kcms/detail/10.1746.TV.20231020.1316.004.html.
- [16] 计涛,纪国晋,王少江,等.PVA纤维对水工抗冲磨混凝土性能的影响[J].东南大学学报:自然科学版,2010,40(A02):5.
- [17] WANG L,HUANG Y,ZHAO F,et al.Comparison between the influence of finely ground phosphorous slag and fly ash on frost resistance,pore structures and fractal features of hydraulic concrete[J].Fractal and Fractional,2022,6(10):598.
- [18] WANG L,ZENG X,LI Y,et al.Influences of MgO and PVA fiber on the abrasion and cracking resistance,pore structure and fractal features of hydraulic concrete[J].Fractal and Fractional,2022,6(11):674.