METHOD FOR REUTILIZING SPENT CONCRETE
PURPOSE: To reutilize a large amt. of spent concrete and to reduce its volume by sintering a fine powder obtained by crushing and screening the spent concrete to produce an aggregate. CONSTITUTION: Spent concrete is crushed and then screened, the grains having >=5mm diameter are utilized as a coa...
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| creator | OKAMOTO MASAMICHI TANAKA HISANOBU INOUE TOSHIKATSU |
| description | PURPOSE: To reutilize a large amt. of spent concrete and to reduce its volume by sintering a fine powder obtained by crushing and screening the spent concrete to produce an aggregate. CONSTITUTION: Spent concrete is crushed and then screened, the grains having >=5mm diameter are utilized as a coarse aggregate material and the grains having 0.3-5mm diameter as a thin aggregate, and the grains having |
| format | Patent |
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CONSTITUTION: Spent concrete is crushed and then screened, the grains having >=5mm diameter are utilized as a coarse aggregate material and the grains having 0.3-5mm diameter as a thin aggregate, and the grains having <=0.3mm diameter are recovered as a fine powder. The fine powder is granulated or formed into a string, then at least one king among SiO2 , CaO, Al2 O3 , Fe2 O3 and R2 O (R is an alkali metal) is added to the product at need, the mixture is sintered at 1200-1600 deg.C for 0.3 to 3hrs and screened at need, to obtain a coarse aggregate and/or a thin aggregate.</description><edition>6</edition><language>eng</language><subject>ARTIFICIAL STONE ; CEMENTS ; CERAMICS ; CHEMISTRY ; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS ; CONCRETE ; DISPOSAL OF SOLID WASTE ; LIME, MAGNESIA ; METALLURGY ; PERFORMING OPERATIONS ; RECLAMATION OF CONTAMINED SOIL SOIL ; REFRACTORIES ; SLAG ; TRANSPORTING ; TREATMENT OF NATURAL STONE</subject><creationdate>1996</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19960806&DB=EPODOC&CC=JP&NR=H08198651A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19960806&DB=EPODOC&CC=JP&NR=H08198651A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>OKAMOTO MASAMICHI</creatorcontrib><creatorcontrib>TANAKA HISANOBU</creatorcontrib><creatorcontrib>INOUE TOSHIKATSU</creatorcontrib><title>METHOD FOR REUTILIZING SPENT CONCRETE</title><description>PURPOSE: To reutilize a large amt. of spent concrete and to reduce its volume by sintering a fine powder obtained by crushing and screening the spent concrete to produce an aggregate. 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CONSTITUTION: Spent concrete is crushed and then screened, the grains having >=5mm diameter are utilized as a coarse aggregate material and the grains having 0.3-5mm diameter as a thin aggregate, and the grains having <=0.3mm diameter are recovered as a fine powder. The fine powder is granulated or formed into a string, then at least one king among SiO2 , CaO, Al2 O3 , Fe2 O3 and R2 O (R is an alkali metal) is added to the product at need, the mixture is sintered at 1200-1600 deg.C for 0.3 to 3hrs and screened at need, to obtain a coarse aggregate and/or a thin aggregate.</abstract><edition>6</edition><oa>free_for_read</oa></addata></record> |
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| language | eng |
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| subjects | ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE DISPOSAL OF SOLID WASTE LIME, MAGNESIA METALLURGY PERFORMING OPERATIONS RECLAMATION OF CONTAMINED SOIL SOIL REFRACTORIES SLAG TRANSPORTING TREATMENT OF NATURAL STONE |
| title | METHOD FOR REUTILIZING SPENT CONCRETE |
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