HYDRAULIC COMPOSITION HAVING LANTHANUM - MITSUBISHI MATERIALS CORP

Title:

HYDRAULIC COMPOSITION HAVING LANTHANUM

Document Type and Number:

Japanese Patent JP2013180904

Kind Code:

A

Abstract:

To provide a hydraulic composition such as cement that specifies the content of lanthanum that substantially causes no strength loss.

This hydraulic composition suppresses strength loss by adjusting the content of lanthanum to be 0.02 to 0.15 wt.% in an inner percentage on an oxide conversion basis. For example, the hydraulic modulus (HM) of clinker is 2.0 to 2.2, the silica modulus (SM) is 2.3 to 2.8, the iron modulus (IM) is 1.9 to 2.1, the amount of sulfur trioxide is 0.5 to 1.5 wt.%, and the amount of free lime is 0.5 to 1.0 wt.%. In ordinary portland cement in which the amount of sulfur trioxide in the cement is 1.5-3.0 wt.%, lanthanum is included therein at 0.02 to 0.15 wt.% in an inner percentage on an oxide conversion basis.

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Inventors:

HARADA TAKUMI
NAKANISHI YOICHIRO
YAMASHITA MAKIO
TANAKA HISANOBU

Application Number:

JP2012043766A

Publication Date:

September 12, 2013

Filing Date:

February 29, 2012

Export Citation:

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Assignee:

MITSUBISHI MATERIALS CORP

International Classes:

C04B7/345; C04B7/02; C04B7/24

Foreign References:

US4619702A

1986-10-28

Attorney, Agent or Firm:

Hiroshi Chiba

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