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

Case Studies in Construction Materials

卷:15

Jing Wei¹  Yongpeng Chen²  Bowen Feng²  Jiesheng Liu²  Lei Wang²  Yidi Zhang²  Zhengguang Sun²  Yaohua Chen² 

[1] Corresponding author at: Wuhan Polytechnic University, School of civil engineering and architechture, Wuhan, 430023, China.;

[2] School of Civil Engineering and Architecture, Wuhan Polytechnic University, 68 Xuefu S. Rd. Changqing Garden, Wuhan, Hubei, 430023, China;

关键词: Desalinated sea sand mortar;    Durability;    Mechanical property;    Fly ash;    SEM;   

DOI  :  

来源: DOAJ

【 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.

【 授权许可】

Unknown