QUALITY EVALUATION METHOD OF FLY ASH

PROBLEM TO BE SOLVED: To provide a quality evaluation method of fly ash capable of confirming the quality of the fly ash by a simple method. SOLUTION: The fly ash, cement, a water reducing agent, and water are agitated to produce a mixture, and the produced mixture is allowed to stand still for a pr...

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Bibliographische Detailangaben
Hauptverfasser:	NISHI SUKEYOSHI, NISHIDA AKIRA, NAWA TOYOHARU, TODA KAZUTOSHI
Format:	Patent
Sprache:	eng
Schlagworte:	ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT 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 INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES LIME, MAGNESIA MEASURING METALLURGY PHYSICS REFRACTORIES SLAG TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TESTING TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a quality evaluation method of fly ash capable of confirming the quality of the fly ash by a simple method. SOLUTION: The fly ash, cement, a water reducing agent, and water are agitated to produce a mixture, and the produced mixture is allowed to stand still for a prescribed amount of time for allowing suspension particles to precipitate. Then, the volume of a precipitate made of the precipitated suspension particles is measured, and the quality of the fly ash is evaluated from the obtained volume. In addition to the evaluation, an evaluation separately shown below is also considered. A Methylene Blue solution and the fly ash are agitated and the absorbance of filtrate obtained by filtering the produced mixture is measured. Then, the obtained absorbance is applied to a relationship between Methylene Blue concentration and absorbance obtained separately, and the quality of the fly ash is evaluated from the difference between the prescribed concentration of the Methylene Blue solution before agitation with the fly ash by calculating the concentration of the Methylene Blue solution and the obtained concentration. COPYRIGHT: (C)2010,JPO&INPIT