不同龄期碱矿渣陶粒混凝土抗压强度试验与能量特征分析

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (7): 2292-2298.

不同龄期碱矿渣陶粒混凝土抗压强度试验与能量特征分析

袁璞^1,2,3, 朱益胜¹

1.安徽理工大学土木建筑学院,淮南 232001;
2.安徽理工大学矿山地下工程教育部工程研究中心,淮南 232001;
3.安徽理工大学深部煤矿采动响应与灾害防控国家重点实验室,淮南 232001

收稿日期:2022-03-21 修回日期:2022-04-21 出版日期:2022-07-15 发布日期:2022-08-01
通讯作者: 朱益胜,硕士研究生。E-mail:1609464232@qq.com
作者简介:袁璞(1987—),男,博士,副教授。主要从事混凝土材料方面的研究。E-mail:puy2012@163.com
基金资助:
安徽省自然科学基金(2108085ME156,1808085QE148);中国博士后科学基金(2018M642504);安徽省教育厅科学研究项目(KJ2017A097)

Compressive Strength Test and Energy Characteristics Analysis of Alkali Slag Ceramsite Concrete at Different Ages

YUAN Pu^1,2,3, ZHU Yisheng¹

1. School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, China;
2. Engineering Research Center of Underground Mine Construction, Ministry of Education, Anhui University of Science and Technology,Huainan 232001, China;
3. State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines,Anhui University of Science and Technology, Huainan 232001, China

Received:2022-03-21 Revised:2022-04-21 Online:2022-07-15 Published:2022-08-01

摘要/Abstract

摘要： 采用煤矸石陶粒与矿渣制备碱矿渣陶粒混凝土,可实现煤矸石和矿渣等固废的再利用。为研究龄期与陶粒掺量对碱矿渣陶粒混凝土抗压强度及能量特性的影响,对不同龄期(1 d、3 d、7 d、14 d、28 d)与不同陶粒体积掺量(0%、25%、50%、75%、100%)的碱矿渣陶粒混凝土进行单轴压缩试验。结果表明,不同龄期与陶粒掺量下混凝土应力-应变曲线均经历了压密阶段、弹性变形阶段、裂缝开展阶段、破坏阶段,煤矸石陶粒的掺入使呈混凝土呈现一定的延性特征。抗压强度、弹性模量与龄期呈良好的正相关指数函数关系,与陶粒掺量呈良好的负相关二次函数关系。随龄期的延长,总能量和弹性能不断升高,耗散能先降低后升高;随陶粒掺量的增大,总能量和弹性能逐渐降低,耗散能先升高后降低。

关键词: 碱矿渣陶粒混凝土, 煤矸石陶粒, 矿渣, 龄期, 抗压强度, 能量特征

Abstract: Alkali slag ceramsite concrete made by coal gangue ceramsite and slag can realize the reuse of solid wastes such as coal gangue and slag. To investigate the influences of curing age and ceramsite content on compressive strength and energy characteristics of alkali slag ceramsite concrete, uniaxial compression tests were carried out for alkali slag ceramsite concrete under different curing ages (1 d, 3 d, 7 d, 14 d, and 28 d) and different ceramsite volume content (0%, 25%, 50%, 75%, and 100%). Test results show that stress-strain curves of concrete under different ages and ceramsite content all undergo four stages, including compaction stage, elastic deformation stage, crack propagation stage, and failure stage. Moreover, the addition of coal gangue ceramsite makes the concrete show a certain ductility characteristic. Both compressive strength and elastic modulus are positively related to curing age in an exponential function, and negatively related to ceramsite content in a quadratic function. With the increase of curing age, total energy and elastic energy increase, while dissipative energy decreases first and then increases. With the increase of ceramsite content, total energy and elastic energy decrease, while dissipative energy increases first and then deceases.

Key words: alkali slag ceramsite concrete, coal gangue ceramsite, slag, age, compressive strength, energy characteristic

中图分类号:

TU528

袁璞, 朱益胜. 不同龄期碱矿渣陶粒混凝土抗压强度试验与能量特征分析[J]. 硅酸盐通报, 2022, 41(7): 2292-2298.

YUAN Pu, ZHU Yisheng. Compressive Strength Test and Energy Characteristics Analysis of Alkali Slag Ceramsite Concrete at Different Ages[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(7): 2292-2298.

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