초록 ▼

A high water content soft soil, for example from the sea or river bed, may be improved in strength by incorporating thereinto a finely divided, quenched iron blast furnace slag treated with sulfuric acid, and a Portland cement. The sulfuric acid-treated slag is a product obtained by reacting a finel

A high water content soft soil, for example from the sea or river bed, may be improved in strength by incorporating thereinto a finely divided, quenched iron blast furnace slag treated with sulfuric acid, and a Portland cement. The sulfuric acid-treated slag is a product obtained by reacting a finely divided, quenched iron blast furnace slag, such as a water-granulated iron blast furnace slag, with sulfuric acid to convert a part of its calcium components into gypsum.

대표청구항 ▼

A process for improving the strength of a water-saturated soft soil comprising: providing a finely divided, non-crystalline, calcium-containing iron blast furnace slag; treating said slag with an aqueous solution containing 20-500 g sulfuric acid per 1 kg of slag to provide an acid-treated slag (A)

A process for improving the strength of a water-saturated soft soil comprising: providing a finely divided, non-crystalline, calcium-containing iron blast furnace slag; treating said slag with an aqueous solution containing 20-500 g sulfuric acid per 1 kg of slag to provide an acid-treated slag (A) with conversion of a part of the calcium content of said slag to gypsum; admixing said acid-treated slag with the soft soil to be treated; and admixing said acid treated slag and the soft soil with (B) a Portland cement to obtain an unconfined compressive strength of the soil greater than that obtained by using comparable amounts of cement, calcium sulfate and unacidified slag.