This technology involves rotating raw, moisture-retaining tidal flat mud at a low speed in a mixer, adding fine aggregate at a 1:1 weight ratio, and mixing at high speed to create a primary mixture. Cement and water are then added to this mixture to produce construction mortar. The key feature is the use of tidal mud as a mortar admixture solely through specific mixing sequences and ratios, eliminating the need for drying or pulverizing the mud.
Despite the growing demand for eco-friendly construction materials and the reduction of cement and aggregate, the abundant tidal flat resources in Korea have largely been neglected. Existing technologies for using tidal mud in construction materials required drying or pulverizing the soil, which limited the material's ability to fully trigger latent hydraulic and pozzolanic reactions.
This technology enhances the latent hydraulic properties of mortar and minimizes cement content by utilizing a two-stage agitation process (62 RPM pre-rotation followed by 124 RPM mixing), a cement-to-primary-mixture ratio of 1:6 to 1:9, and fine aggregate that passes through a 5mm sieve at a rate of at least 85%. The process also includes demolding within a flow range of 100–110mm. Applicable to eco-friendly plastering and masonry mortar, as well as on-site material production near the west coast, it enables the supply of low-carbon construction materials that reduce cement consumption without the need for energy-intensive drying equipment.
This invention was developed with support from the National Research Foundation of Korea for the development of eco-friendly construction materials using tidal flats.
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