Authors developed concrete using seawater as mixing water. A combination of sea water, ordinary portland cement, ground granulated blast-furnace slag, fly Ash, silica fume, and a special chemical admixture containing calcium nitrite was adopted to densify concrete. This concrete is hereafter referred to as “concrete with seawater”. This technology not only improves the performance of concrete but also shortens the material transportation process and reduces cost and CO2 emission from construction work by effective use of seawater when producing concrete in a region where fresh water is not readily available, such as isolated islands and coastal areas. Furthermore, authors developed methods of producing concrete using by-product aggregates such as large uncrushed concrete debris from the earthquake disaster or steel making slag. Especially when using large uncrushed concrete debris, pre-placed aggregate concrete method and post-packed concrete method were adopted to reduce processing time and cost by using as much uncrushed concrete debris as possible. This paper describes practical experiments to which we applied these production methods using seawater and by-product aggregates to build concrete blocks for ports and harbors and a pavement for a steel making plant.
|ジャーナル||Sustainable Construction Materials and Technologies|
|出版ステータス||Published - 2016 1 1|
|イベント||4th International Conference on Sustainable Construction Materials and Technologies, SCMT 2016 - Las Vegas, United States|
継続期間: 2016 8 7 → 2016 8 11
ASJC Scopus subject areas