大温差盐渍土环境下矿物掺合料混凝土抗裂性能研究

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发布时间：2020-01-06 00:00:00

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大温差盐渍土环境下矿物掺合料混凝土抗裂性能研究

Research on Crack Resistance of Mineral Admixture Concrete Under Large Temperature Difference and Saline Soil Environment

2022年第5期

粉煤灰；矿粉；大温差；盐渍土侵蚀；抗裂性能；微观结构

Fly ash; Slag; Large temperature difference; Saline soil erosion; Crack resistance; Microstructure

2022年第5期

10.19761/j.1000-4637.2022.05.007.05

国家自然科学基金联合基金重点项目（U2040224）。

卢燕1，夏星1，井维东2，王锟1

1.郑州大学水利科学与工程学院，河南郑州 450001；2.中国建筑第七工程局有限公司，河南郑州 450001

卢燕1，夏星1，井维东2，王锟1

卢燕,夏星,井维东,等.大温差盐渍土环境下矿物掺合料混凝土抗裂性能研究[J].混凝土与水泥制品,2022(5):7-11.

LU Y,XIA X,JING W D,et al.Research on Crack Resistance of Mineral Admixture Concrete Under Large Temperature Difference and Saline Soil Environment[J].China Concrete and Cement Products,2022(5):7-11.

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1000

摘要：制备了基准组及三组不同掺量的粉煤灰-矿粉混凝土，采用环境试验箱模拟大温差及盐渍土侵蚀环境，研究了混凝土的力学性能和抗裂性能。结果表明：矿物掺合料的掺入降低了混凝土的力学性能，但提高了其力学性能增长速率，还提高了混凝土的抗裂性能；掺15%粉煤灰和20%矿粉的混凝土前期抗压强度增长速率较快，3~14 d的抗压强度平均增长率比基准混凝土高102.46%，28 d的断裂能比普通混凝土高50.67%；含矿物掺合料的混凝土抗折强度增长速率均高于基准混凝土；通过SEM发现，适量矿物掺合料改善了混凝土内部的密实度和孔隙结构，裂缝宽度明显减小。 Abstract: The reference concrete and three kinds of fly ash-slag concrete with different contents were prepared, and their mechanical properties and crack resistance were studied by using an environmental test chamber to simulate the environment of large temperature difference and saline soil erosion. The results show that the addition of mineral admixtures reduces the mechanical properties of concrete, but increases its growth rate and also improves the crack resistance of concrete. The compressive strength growth rate of concrete mixed with 15% fly ash and 20% slag is faster in the early stage. The average growth rate of compressive strength from 3 d to 14 d is 102.46% higher than that of reference concrete, and the fracture energy of 28 d is 50.67% higher than that of reference concrete. The flexural strength growth rate of the three groups of mineral admixture concrete is generally higher than that of reference concrete. It is found by SEM that the appropriate mineral admixture improves the compactness and pore structure inside the concrete, the crack width is significantly reduced.

英文名 : Research on Crack Resistance of Mineral Admixture Concrete Under Large Temperature Difference and Saline Soil Environment

刊期 : 2022年第5期

关键词 : 粉煤灰；矿粉；大温差；盐渍土侵蚀；抗裂性能；微观结构

Key words : Fly ash; Slag; Large temperature difference; Saline soil erosion; Crack resistance; Microstructure

刊期 : 2022年第5期

DOI : 10.19761/j.1000-4637.2022.05.007.05

文章编号 :

基金项目 : 国家自然科学基金联合基金重点项目（U2040224）。

作者 : 卢燕1，夏星1，井维东2，王锟1

单位 : 1.郑州大学水利科学与工程学院，河南郑州 450001；2.中国建筑第七工程局有限公司，河南郑州 450001

卢燕1，夏星1，井维东2，王锟1

卢燕,夏星,井维东,等.大温差盐渍土环境下矿物掺合料混凝土抗裂性能研究[J].混凝土与水泥制品,2022(5):7-11.

LU Y,XIA X,JING W D,et al.Research on Crack Resistance of Mineral Admixture Concrete Under Large Temperature Difference and Saline Soil Environment[J].China Concrete and Cement Products,2022(5):7-11.

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摘要

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结论

参考文献

引用本文

Abstract: The reference concrete and three kinds of fly ash-slag concrete with different contents were prepared, and their mechanical properties and crack resistance were studied by using an environmental test chamber to simulate the environment of large temperature difference and saline soil erosion. The results show that the addition of mineral admixtures reduces the mechanical properties of concrete, but increases its growth rate and also improves the crack resistance of concrete. The compressive strength growth rate of concrete mixed with 15% fly ash and 20% slag is faster in the early stage. The average growth rate of compressive strength from 3 d to 14 d is 102.46% higher than that of reference concrete, and the fracture energy of 28 d is 50.67% higher than that of reference concrete. The flexural strength growth rate of the three groups of mineral admixture concrete is generally higher than that of reference concrete. It is found by SEM that the appropriate mineral admixture improves the compactness and pore structure inside the concrete, the crack width is significantly reduced.

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[1] 王甲春,阎培渝.早龄期混凝土结构开裂风险分析[J].应用基础与工程科学学报,2006(2):262-267.
[2] 王雪芳,郑建岚,晁鹏飞.矿物掺合料对混凝土早期开裂性能的影响[J].中国矿业大学学报,2007(6):768-772,804.
[3] 薛慧君,申向东,王仁远,等.风沙吹蚀与干湿循环作用下风积沙混凝土抗氯盐侵蚀机理[J].农业工程学报,2017,33(18):118-126.
[4] 许国东.大掺量工业废渣混凝土早期开裂行为研究[D].南京:东南大学,2018.
[5] 张骏,田帅,梁丽敏,等.矿物掺合料对混凝土早期收缩及开裂性能的影响[J].混凝土与水泥制品,2018(9):16-19.
[6] 张守治,汪守淳,乔艳静,等.矿物掺合料对高强混凝土塑性开裂影响的研究[J].混凝土与水泥制品,2010(5):24-27.
[7] 李金京,刘占良.矿渣粉对水泥混凝土抗裂性及强度的影响研究[J].筑路机械与施工机械化,2015(9):86-88.
[8] BERODIER E M J.Impact of the Supplementary Cementitious Materials on the Kinetics and Microstructural Development of Cement Hydration[J].ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE,2015,10:50756417.
[9] SCRIVENER K L,JUILLAND P,MONTEIRO P J M.Advances in Understanding Hydration of Portland Cement[J].Cement and Concrete Research,2015,78:38-56.
[10] 张云升,孙伟,郑克仁,等.水泥-粉煤灰浆体的水化反应进程[J].东南大学学报(自然科学版),2006(1):118-123.
[11] 陈有亮,索晓航,蒋立浩,等.高温循环作用后混凝土力学性能试验研究[J].力学季刊,2012,33(4):577-583.
[12] 魏亚,郑小波,郭为强.干燥环境下内养护混凝土收缩、强度及开裂性能[J].建筑材料学报,2016,19(5):902-908.
[13] 白周林.粉煤灰与矿渣、硅灰复掺混凝土干湿循环下抗硫酸盐侵蚀性能研究[J].粉煤灰综合利用,2020,34(2):101-104.
[14] 王洪生,江守恒,张伟潼.预应力箱梁混凝土裂缝控制技术[J].低温建筑技术,2012,34(5):140-142.
[15] 田帅,吕剑锋,李世华,等.矿物掺合料对高性能混凝土耐久性的影响[J].混凝土与水泥制品,2020(10):12-16.
[16] 中华人民共和国水利部.水工混凝土试验规程:SL/T 352—2020[S].北京:中国水利水电出版社,2020.
[17] 中华人民共和国住房和城乡建设部.混凝土物理力学性能试验方法标准:GB/T 50081—2019[S].北京:中国建筑工业出版社,2019.
[18] 中华人民共和国国家发展和改革委员会.水工混凝土断裂试验规程:DL/T 5332—2005[S].北京:中国电力出版社,2005.
[19] NIE Q,ZHOU C,SHU X,et al.Chemical, Mechanical, and Durability Properties of Concrete with Local Mineral Admixtures Under Sulfate Environment in Northwest China[J].Materials,2014,7(5):3772-3785.
[20] 刘海峰,高建明,王边,等.掺矿渣微粉混凝土的微细观性能试验研究[J].混凝土与水泥制品,2003(6):16-18.

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大温差盐渍土环境下矿物掺合料混凝土抗裂性能研究

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