Yellow earth composition and construction indusry for park walk road construction

PURPOSE : A yellow earth composition containing environmental affinitive materials such as rice straw, charcoal and salt is provided to construct strolls in the park, which has improved strength and durability, and prevents harmful insects.CONSTITUTION : The yellow earth composition is obtained by mixing yellow earth mixture with 35-40wt.% of solidifying solution. The yellow earth mixture contains 20-25wt.% of polishing sand, 1.5-2wt.% of rice straw(3-7cm length), 0.1-0.2wt.% of salt and 1.5-2wt.% of charcoal, based on the amount of yellow earth(wt.%). The solidifying solution, like thick syrup, is obtained by mixing solidifying materials, seaweeds(Grateloupia) with a width less than 1cm, with water in a ratio of 4 : 6 and heating mixtures. The yellow earth composition is applied over gravels spread on the bottom for strolls and the surface of yellow earth is pressed with a roller for constructing strolls in the park.? KIPO 2005