Title: Method for improving the strength of a water-saturated soft soil

Abstract: A water-saturated soft soil is efficiently improved in its strength by incorporating therein an additive composed of ingredients A and B; the ingredient A comprises gypsum and the ingredient B comprises a mixture of 40-55% by weight of a Portland cement and 60-45% by weight of a water-granulated iron blast furnace slag having a particle size almost equal to or smaller than that of the Portland cement. The ratio by weight of the ingredient A to the ingredient B ranges from 10/90 to 30/70 and the total amount of the ingredients A and B used for the soft soil is sufficient to strengthen the soft soil.

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Inventors: Miyoshi, Hajime (Koganei, JP)
Okabayashi, Ikuo (Yamato, JP)
Asanagi, Etsuo (Kashiwa, JP)

Application Number: 06/309766
Filing Date: 1981-10-08
Publication_date: 1983-01-11
Assignee: CHIYODA CHEM ENG CONSTRUCT CO (JP)

Primary Class(es): 588/257 588/252, 405/266, 166/292, 106/715
Other Classes: C09K17/04; C09K17/02; E02D3/12; C09K17/00
US Patent Ref:

1748839	February, 1930	Grunewald	106/97
2182714	December, 1939	Witt	106/97
2947643	August, 1960	Kamlet	106/97
3947284	March, 1976	Kitsugi et al.	106/89
4209335	June, 1980	Katayama et al.	106/89

Other Refs:
Primary Examiner: Novosad, Stephen J.
Assistant Examiner: Suchfield, George A.
Attorney: Birch, Stewart, Kolasch & Birch

Parent Case Data:

This is a divisional of copending application Ser. No. 115,491 filed on Jan. 25, 1980, n