Self-filling concrete using sea water and sea sand

2012-0625-01
researcher's name
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background

Regions where methods for transportation via land and sea routes are limited, represented by places such as isolated islands and desert areas, face consistently high procurement costs due to difficulties related to obtaining pure water, sand, and gravel in addition to high transportation costs. 

summary

This project developed self-filling concrete using sea water as mixing water, sand as aggregate, and a new admixture that can provide these materials with superior fluidity and appropriate viscosity (A high-performance AE water reducing agent with a one-pack type thickener containing salt).

application/development

This technology can be used for the construction of structures that use materials with virtually no problems related to gravel corrosion (stainless steel, carbon fibers, etc.). It is possible to undertake construction using sand if salt water is available. It also makes it easy to do work in coastal areas. 

predominance

Because the concrete has low viscosity compared to conventional high-flow concrete and because it requires a low variety of composite materials and is a self-filling concrete, it enhances the efficiency of manufacturing and construction. As a result, it makes easy and cheap manufacturing possible. 

purpose of providing seeds

Sponsord research, Collaboration research, Technical consultation

material

  • The concrete uses sea water as mixing water (slump flow prior to hardening)
  • U-filling ability test: It has self-filling properties corresponding to rank 2 according to high-flow concrete construction guidelines (set by the Japan Society of Civil Engineers)
posted: 2014/05/21