Title:
CEMENT HARDENING ACCELERATOR AND ITS PRODUCTION
Document Type and Number:
WIPO Patent Application WO/1990/011257
Kind Code:
A1
Abstract:
A cement hardening accelerator comprising 100 parts by weight of a powder of either a sinter containing either 3CaO.2Na2O.5Al2O3, Na2SO4 and Na2O.Al2O3, or 3CaO.2Na2O.5Al2O3, Na2SO4 and 4CaO.3Al2O3.SO3 each in a specified proportion, or a mixture of substances selected to give the same chemical composition as that of the sinter; 5 to 70 parts by weight of a powder of an alkali metal carbonate; and not more than 170 parts by weight of a powder of lime. It can remarkably accelerate the setting of cement even when added to the cement in a small amount, and can adjust the setting initiation time of cement by varying the amount of its addition.
Inventors:
KIKUCHI MASATSUNE (JP)
OOMORI HIROSHI (JP)
HOSODA HATSUTOSHI (JP)
KOUDA SUSUMU (JP)
OOMORI HIROSHI (JP)
HOSODA HATSUTOSHI (JP)
KOUDA SUSUMU (JP)
Application Number:
PCT/JP1990/000413
Publication Date:
October 04, 1990
Filing Date:
March 28, 1990
Export Citation:
Assignee:
ONODA CEMENT CO LTD (JP)
International Classes:
C04B22/00; C04B28/02; (IPC1-7): C04B22/06
Foreign References:
| JPH0238350A | 1990-02-07 | |||
| JPH0251456A | 1990-02-21 | |||
| JPH021104B2 | 1990-01-10 |
Other References:
See also references of EP 0416134A4
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