The Impact of Marine Water on Different Types of Coarse Aggregate of Geopolymer Concrete

• 作者: Abolwafa Mohamad Elthakeb Mohammed Taha Nooman Shimaa Younis Megahed Walid Alsayed Mohamed Walid Hessian Soufy
• 来源期刊: 矿物质和材料特性和工程(英文)
• 学科: 工学
• 关键词: GEOPOLYMER CONCRETE FLY Ash Ground Granulated Blast FURNACE Slag (GGBFS) Sea WATER Natural AGGREGATE CONCRETE Recycled CONCRETE AGGREGATE Compressive Strength and Durability
• 年，卷（期）: 2019,（5）
• 页码范围: 330-353
• 页数: 24页
• 分类号: TU5

摘要

This research studies the impact of different types of coarse aggregate on the behavior of geopolymer concrete based on both fly ash (FA) and ground granulated blast furnace slag (GGBFS) in different marine environments. Aiming to solve the problems caused by the construction and demolition waste and the depletion of natural aggregates, in the present study coarse recycled aggregates is used to produce new green concrete with a fly ash-slag based geopolymer. By this examination, the research seeks to improve the quality and productivity of concrete used in construction and hydraulic projects. For this research, four mixtures containing different types of coarse aggregate in two different water environments were used. The utilized mixtures contained natural aggregate concrete (NAC) such as basalt and crushed marble. Also, recycled coarse aggregate concrete (RAC), which totally replaced natural aggregate, was presented in this paper such as crushed concrete and crushed ceramic. For this study, in the sieve analysis;specific and unit weights, was recorded. Furthermore, the mechanical properties were determined, using a compressive test that was conducted on the 7th, 28th, 56th and 90th days at different water environments;potable water (PW) and sea water (SW). Durability test was also performed for total absorption measurement. Results indicated that geopolymer concrete exhibits better strength in marine environments than in those of potable water. Results also showed that crushed marble (CMA) exhibits higher compressive strength and durability.