Research on properties and durability of desalinated sea sand cement modified with fly ash

被引:18
作者
Bowen, Feng [1 ]
Jiesheng, Liu [1 ]
Jing, Wei [1 ]
Yidi, Zhang [1 ]
Yaohua, Chen [1 ]
Lei, Wang [1 ]
Yongpeng, Chen [1 ]
Zhengguang, Sun [2 ]
机构
[1] Wuhan Polytech Univ, Sch Civil Engn & Architecture, 68 Xuefu S Rd, Wuhan 430023, Hubei, Peoples R China
[2] Hubei Univ, Minist Educ, Key Lab Green Preparat & Applicat Funct Mat, Wuhan, Peoples R China
关键词
Desalinated sea sand mortar; Durability; Mechanical property; Fly ash; SEM; PORE-SIZE; SEAWATER; STRENGTH; CONCRETE; FINENESS;
D O I
10.1016/j.cscm.2021.e00675
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
With the development of construction industry in China, the demand for construction concrete materials has increased in recent years, and the urbanization process strongly recommends the phenomenon that the natural recovery rate is less than the utilization rate while the river sand is overexploited. Marine resources are relatively abundant. The existing sea sand has naturally become a substitute for river sand. In this paper,to compared with the cement mortar formed by desalination sea sand and ordinary river sand mortar, we studied its physical properties, working performance tests and durability performance.Meanwhile, the basic performance and durability properties of mortar prepared by modified sea sand mixed with fly ash were studied.The results showed that for desalinated sea sand cement mortar increased chemical ions corrosion resistance. The setting time shortened,the mechanical properties of specimens decreased.After adding fly ash as modification experiments,the working properties and durability significantly improved.The mechanical properties of modified sea sand cement mortar enhanced.Then the micro-structure of the modified sea sand cement mortar was observed through SEM so as to further explain the reasons for the influence of performance changes and provided reference for future research on sea sand concrete.
引用
收藏
页数:11
相关论文
共 28 条
[1]   Effect of fly ash on compressive strength and chloride binding of seawater-mixed mortars [J].
Ahmed Shaikh, Faiz Uddin ;
Dobson, Jason .
JOURNAL OF SUSTAINABLE CEMENT-BASED MATERIALS, 2019, 8 (05) :275-289
[2]  
[Anonymous], 2006, J SE U NATL SCI ED
[3]  
Bian L., 2012, Concr. Cem. Products, V02, P11
[4]   Predicting the chloride penetration of fly ash concrete in seawater [J].
Chalee, W. ;
Jaturapitakkul, C. ;
Chindaprasirt, P. .
MARINE STRUCTURES, 2009, 22 (03) :341-353
[5]   Effect of fly ash fineness on compressive strength and pore size of blended cement paste [J].
Chindaprasirt, P ;
Jaturapitakkul, C ;
Sinsiri, T .
CEMENT & CONCRETE COMPOSITES, 2005, 27 (04) :425-428
[6]   Implication of pore size distribution parameters on compressive strength, permeability and hydraulic diffusivity of concrete [J].
Das, B. B. ;
Kondraivendhan, B. .
CONSTRUCTION AND BUILDING MATERIALS, 2012, 28 (01) :382-386
[7]   Influence of Fineness of Fly Ash on the Carbonation and Electrical Conductivity of Concrete [J].
Das, B. B. ;
Pandey, S. P. .
JOURNAL OF MATERIALS IN CIVIL ENGINEERING, 2011, 23 (09) :1365-1368
[8]   Properties and Application of Sea Sand in Sea Sand-Seawater Concrete [J].
Dhondy, T. ;
Remennikov, A. ;
Neaz Sheikh, M. .
JOURNAL OF MATERIALS IN CIVIL ENGINEERING, 2020, 32 (12)
[9]   Offshore sand for reinforced concrete [J].
Dias, W. P. S. ;
Seneviratne, G. A. P. S. N. ;
Nanayakkara, S. M. A. .
CONSTRUCTION AND BUILDING MATERIALS, 2008, 22 (07) :1377-1384
[10]   Effects of fly ash particle size on strength of Portland cement fly ash mortars [J].
Erdogdu, K ;
Turker, P .
CEMENT AND CONCRETE RESEARCH, 1998, 28 (09) :1217-1222