MANUFACTURE OF RC SEGMENT
PURPOSE:To obtain a product having fine surface by a method wherein an air suction port is provided on the upper part of a tightly closed form to generate negative pressure in the interior thereof and highly flowable concrete is forced and loaded from below into the form and concrete pressure therei...
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| creator | UNO YOSHIKI NISHIMOTO NORIO SUGIMOTO YOSHIHITO OKAMURA NAOTOSHI IWATO MASAHIKO HIRONAKA YOSHIAKI ITO SHINICHIRO SASAKI JUN |
| description | PURPOSE:To obtain a product having fine surface by a method wherein an air suction port is provided on the upper part of a tightly closed form to generate negative pressure in the interior thereof and highly flowable concrete is forced and loaded from below into the form and concrete pressure therein is maintained for a certain period. CONSTITUTION:An air suction port 18 is mounted to the upper part of a tightly closed segment form A through a valve B, and a concrete casting port 17 is provided at the lower part thereof. Next the air in the form A is drawn by means of a vacuum pump G to generate negative pressure and highly flowable concrete, which does not need to be compacted, is forced and loaded into the form by means of a concrete pump E. Thereafter conctrete pressure in the form A is maintained for a certain period of time to eliminate occurrences of air pits of small diameter or water pits due to bleeding water. By this method, a fine concrete product which eliminate the need for surface finishing can be obtained. |
| format | Patent |
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CONSTITUTION:An air suction port 18 is mounted to the upper part of a tightly closed segment form A through a valve B, and a concrete casting port 17 is provided at the lower part thereof. Next the air in the form A is drawn by means of a vacuum pump G to generate negative pressure and highly flowable concrete, which does not need to be compacted, is forced and loaded into the form by means of a concrete pump E. Thereafter conctrete pressure in the form A is maintained for a certain period of time to eliminate occurrences of air pits of small diameter or water pits due to bleeding water. By this method, a fine concrete product which eliminate the need for surface finishing can be obtained.</description><edition>6</edition><language>eng</language><subject>EARTH DRILLING ; FIXED CONSTRUCTIONS ; GALLERIES ; LARGE UNDERGROUND CHAMBERS ; MINING ; SHAFTS ; TUNNELS</subject><creationdate>1995</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=19950203&DB=EPODOC&CC=JP&NR=H0734787A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25543,76293</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19950203&DB=EPODOC&CC=JP&NR=H0734787A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>UNO YOSHIKI</creatorcontrib><creatorcontrib>NISHIMOTO NORIO</creatorcontrib><creatorcontrib>SUGIMOTO YOSHIHITO</creatorcontrib><creatorcontrib>OKAMURA NAOTOSHI</creatorcontrib><creatorcontrib>IWATO MASAHIKO</creatorcontrib><creatorcontrib>HIRONAKA YOSHIAKI</creatorcontrib><creatorcontrib>ITO SHINICHIRO</creatorcontrib><creatorcontrib>SASAKI JUN</creatorcontrib><title>MANUFACTURE OF RC SEGMENT</title><description>PURPOSE:To obtain a product having fine surface by a method wherein an air suction port is provided on the upper part of a tightly closed form to generate negative pressure in the interior thereof and highly flowable concrete is forced and loaded from below into the form and concrete pressure therein is maintained for a certain period. CONSTITUTION:An air suction port 18 is mounted to the upper part of a tightly closed segment form A through a valve B, and a concrete casting port 17 is provided at the lower part thereof. Next the air in the form A is drawn by means of a vacuum pump G to generate negative pressure and highly flowable concrete, which does not need to be compacted, is forced and loaded into the form by means of a concrete pump E. Thereafter conctrete pressure in the form A is maintained for a certain period of time to eliminate occurrences of air pits of small diameter or water pits due to bleeding water. By this method, a fine concrete product which eliminate the need for surface finishing can be obtained.</description><subject>EARTH DRILLING</subject><subject>FIXED CONSTRUCTIONS</subject><subject>GALLERIES</subject><subject>LARGE UNDERGROUND CHAMBERS</subject><subject>MINING</subject><subject>SHAFTS</subject><subject>TUNNELS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1995</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZJD0dfQLdXN0DgkNclXwd1MIclYIdnX3dfUL4WFgTUvMKU7lhdLcDApuriHOHrqpBfnxqcUFicmpeakl8V4BHgbmxibmFuaOxkQoAQDSbx_A</recordid><startdate>19950203</startdate><enddate>19950203</enddate><creator>UNO YOSHIKI</creator><creator>NISHIMOTO NORIO</creator><creator>SUGIMOTO YOSHIHITO</creator><creator>OKAMURA NAOTOSHI</creator><creator>IWATO MASAHIKO</creator><creator>HIRONAKA YOSHIAKI</creator><creator>ITO SHINICHIRO</creator><creator>SASAKI JUN</creator><scope>EVB</scope></search><sort><creationdate>19950203</creationdate><title>MANUFACTURE OF RC SEGMENT</title><author>UNO YOSHIKI ; NISHIMOTO NORIO ; SUGIMOTO YOSHIHITO ; OKAMURA NAOTOSHI ; IWATO MASAHIKO ; HIRONAKA YOSHIAKI ; ITO SHINICHIRO ; SASAKI JUN</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JPH0734787A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1995</creationdate><topic>EARTH DRILLING</topic><topic>FIXED CONSTRUCTIONS</topic><topic>GALLERIES</topic><topic>LARGE UNDERGROUND CHAMBERS</topic><topic>MINING</topic><topic>SHAFTS</topic><topic>TUNNELS</topic><toplevel>online_resources</toplevel><creatorcontrib>UNO YOSHIKI</creatorcontrib><creatorcontrib>NISHIMOTO NORIO</creatorcontrib><creatorcontrib>SUGIMOTO YOSHIHITO</creatorcontrib><creatorcontrib>OKAMURA NAOTOSHI</creatorcontrib><creatorcontrib>IWATO MASAHIKO</creatorcontrib><creatorcontrib>HIRONAKA YOSHIAKI</creatorcontrib><creatorcontrib>ITO SHINICHIRO</creatorcontrib><creatorcontrib>SASAKI JUN</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>UNO YOSHIKI</au><au>NISHIMOTO NORIO</au><au>SUGIMOTO YOSHIHITO</au><au>OKAMURA NAOTOSHI</au><au>IWATO MASAHIKO</au><au>HIRONAKA YOSHIAKI</au><au>ITO SHINICHIRO</au><au>SASAKI JUN</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>MANUFACTURE OF RC SEGMENT</title><date>1995-02-03</date><risdate>1995</risdate><abstract>PURPOSE:To obtain a product having fine surface by a method wherein an air suction port is provided on the upper part of a tightly closed form to generate negative pressure in the interior thereof and highly flowable concrete is forced and loaded from below into the form and concrete pressure therein is maintained for a certain period. CONSTITUTION:An air suction port 18 is mounted to the upper part of a tightly closed segment form A through a valve B, and a concrete casting port 17 is provided at the lower part thereof. Next the air in the form A is drawn by means of a vacuum pump G to generate negative pressure and highly flowable concrete, which does not need to be compacted, is forced and loaded into the form by means of a concrete pump E. Thereafter conctrete pressure in the form A is maintained for a certain period of time to eliminate occurrences of air pits of small diameter or water pits due to bleeding water. By this method, a fine concrete product which eliminate the need for surface finishing can be obtained.</abstract><edition>6</edition><oa>free_for_read</oa></addata></record> |
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| subjects | EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS MINING SHAFTS TUNNELS |
| title | MANUFACTURE OF RC SEGMENT |
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