CEMENT COMPOSITION

PROBLEM TO BE SOLVED: To obtain a cement composition capable of increasing the amount of sewage sludge used without causing prolongation of setting time of cement and reduction in initial strength. SOLUTION: This Portland cement clinker is produced by using a raw material which comprises a sewage sl...

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Bibliographic Details
Main Authors ICHIKAWA MAKIHIKO, HONMA KENICHI, NOGAWA JUN, OZAWA HISASHI
Format Patent
LanguageEnglish
Published 31.10.2000
Edition7
Subjects
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC
GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SLAG
TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE
TREATMENT OF NATURAL STONE
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Summary:PROBLEM TO BE SOLVED: To obtain a cement composition capable of increasing the amount of sewage sludge used without causing prolongation of setting time of cement and reduction in initial strength. SOLUTION: This Portland cement clinker is produced by using a raw material which comprises a sewage sludge and a sulfur-containing material and is adjusted to have >=0.5 weight ratio of (SO3 amount from sulfur-containing material)/(P2O5 amount from sewage sludge) or comprises the sewage sludge and a calcium-containing material, a calcium silicate-based mineral and is adjusted to have >=0.6 weight ratio of (CaO amount from calcium-containing material)/(P2O5 amount from sewage sludge).
Bibliography:Application Number: JP19990114830