Investigation on crack resistance of full aeolian sand high-performance concrete synergistically modified by supplementary cementitious materials and superabsorbent polymer

被引:4
作者
Zhu, Linlin [1 ]
Zheng, Mulian [1 ]
Zhang, Wei [2 ]
Qu, Guanglei [1 ]
Chen, Chen [1 ]
Cheng, Erlei [1 ]
Ou, Zhongwen [3 ]
机构
[1] Changan Univ, Key Lab Special Area Highway Engn, Minist Educ, Xian 710064, Shaanxi, Peoples R China
[2] Fuyang Normal Univ, Fuyang 236041, Anhui, Peoples R China
[3] Chinese Peoples Liberat Army Logist Engn Univ, Chem & Mat Engn Dept, Chongqing 401331, Peoples R China
关键词
High -performance concrete; Aeolian sand; Superabsorbent polymer; Crack; Hydration; Microstructure; SILICA FUME; FLY-ASH; MECHANICAL-PROPERTIES; TRICALCIUM SILICATE; SHRINKAGE CRACKING; HYDRATION; STRENGTH; FIBER; MICROSTRUCTURE; PERMEABILITY;
D O I
10.1016/j.conbuildmat.2023.134681
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
The development of full aeolian sand high-performance concrete (FA-HPC) can alleviate the dilemma of river sand shortage. However, the high cracking potential appears due to the characteristic of low water-to-binder ratio and high cementitious materials content. Herein, supplementary cementitious materials (SCMs), i.e., fly ash and silica fume, and superabsorbent polymer (SAP) are used to optimize the crack resistance synergistically. The crack resistance in plasticity and hardening stages are investigated based on flat plate cracking and ring restrained cracking combined with chloride ions penetration, respectively. Meanwhile, capillary pressure, mechanical strength, and internal temperature field were also involved. Additionally, the modification mechanism of SCMs and SAP is analyzed from a microscopic perspective via hydration heat, phase analysis, and microstructure. The results showed that whether single use or binary mixing, fly ash and silica fume significantly improved the crack resistance of FA-HPC. Moreover, it was further enhanced by the SAP, presenting a 63.39% and 96.96% increase in crack resistance at plasticity stage and hardening stage respectively as well as a 78.31% reduction in chloride ions penetration. Contrary to silica fume, fly ash hindered early hydration leading to a decrease in capillary pressure, strength, and internal temperature field with content dependence. Besides, the most intense volcanic ash reaction was observed in binary mixing. Although SAP delayed the early hydration, the later hydration degree was improved obtaining more hydration products at 28d since the internal curing effect. Thereby, the more refined microstructure was achieved for more optimized crack resistance. This study provides an available strategy for reducing the cracking risk of FA-HPC to promote wide application in engineering.
引用
收藏
页数:15
相关论文
共 60 条
[51]   Evaluation of early-age thermal cracking resistance of high w/b, high volume fly ash (HVFA) concrete using temperature stress testing machine [J].
Xin, Jianda ;
Liu, Yi ;
Zhang, Guoxin ;
Wang, Zhenhong ;
Wang, Juan ;
Yang, Ning ;
Qiao, Yu .
CASE STUDIES IN CONSTRUCTION MATERIALS, 2022, 16
[52]   Optimization of the mix proportion for desert sand concrete based on a statistical model [J].
Yan, Wenlong ;
Wu, Gang ;
Dong, Zhiqiang .
CONSTRUCTION AND BUILDING MATERIALS, 2019, 226 :469-482
[53]   Effect of superabsorbent polymer introduction on properties of alkali-activated slag mortar [J].
Yang, Zhengxian ;
Shi, Peng ;
Zhang, Yong ;
Li, Zhenming .
CONSTRUCTION AND BUILDING MATERIALS, 2022, 340
[54]  
Zhang S.T.J., 2018, Cem. Concr. Compos., V2018, P4
[55]   Mix design and characteristics evaluation of high-performance concrete with full aeolian sand based on the packing density theory [J].
Zhang, Wei ;
Zheng, Mulian ;
Zhu, Linlin ;
Lv, Yuzun .
CONSTRUCTION AND BUILDING MATERIALS, 2022, 349
[56]  
Zhengxun Yang, 2020, IOP Conference Series: Materials Science and Engineering, V774, DOI 10.1088/1757-899X/774/1/012076
[57]   Feasibility analysis of treating aeolian sand and recycled mixed powder as environmentally friendly materials in the ultra-high-performance concrete [J].
Zhu, Chao ;
Yi, Teng ;
Lin, Xin ;
Bai, Guoliang ;
Liu, Chao .
DEVELOPMENTS IN THE BUILT ENVIRONMENT, 2023, 15
[58]   Study on the mechanical properties and prediction model of ultra-high performance concrete containing aeolian sand and recycled mixed powder [J].
Zhu, Chao ;
Liu, Xiaoge ;
Lin, Xin ;
Liu, Chao ;
Bai, Guoliang .
JOURNAL OF BUILDING ENGINEERING, 2023, 74
[59]   Evolution and mechanism on shrinkage of high-performance concrete with full aeolian sand cured by superabsorbent polymer [J].
Zhu, Linlin ;
Zheng, Mulian ;
Zhang, Wei ;
Chen, Wang ;
Ou, Zhongwen .
CONSTRUCTION AND BUILDING MATERIALS, 2023, 400
[60]   The role of ultra-fine supplementary cementitious materials in the durability and microstructure of airport pavement concrete [J].
Zong, Hongya ;
Wang, Yang ;
Wang, Guangzhou ;
Li, Qiang ;
Li, Fuxin ;
Li, Qinfei ;
Hou, Pengkun .
CONSTRUCTION AND BUILDING MATERIALS, 2023, 392