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Title:
CONCRETE COMPOSITION FOR PREFABRICATED PC BOX, HAVING IMPROVED CHEMICAL RESISTANCE BY USING SILICA-BASED SLAG FINE POWDER, AND PREFABRICATED PC BOX USING SAME
Document Type and Number:
WIPO Patent Application WO/2019/009464
Kind Code:
A1
Abstract:
The present invention relates to a concrete composition for a prefabricated precast concrete (PC) box, having improved chemical resistance by using a silica-based slag fine powder, and a prefabricated PC box using the same and, more specifically, to: a concrete composition for a prefabricated PC box, having improved chemical resistance by using a silica-based slag fine powder, the composition increasing the replacement rate, with respect to cement, of a silica-based slag fine powder obtained by finely grinding, into at least a cement particle level, granulated ferronickel slag that is the industrial by-product of ferronickel to be used as a main material in stainless steel manufacturing among steel materials; and a prefabricated PC box using the same. One preferable embodiment of the concrete composition for a prefabricated PC box, having improved chemical resistance by using a silica-based slag fine powder, of the present invention, comprises, on the basis of unit volume of the concrete composition: 160-180 kg/m3 of water; 420-460 kg/m3 of cement; 750-850 kg/m3 of fine aggregate; and 920-940 kg/m3 of coarse aggregate, wherein 25-35 wt% of a silica-based slag fine powder is replaced and added on the basis of 100 wt% of the cement, and 0.88-0.92 wt% of an admixture and 0.0008-0.001 wt% of an air entraining agent are mixed.

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Inventors:
LEE, Chang Hong (A dong 603ho, EcoMetro 3-cha The Tower,40, Soraeyeongnam-ro, Namdong-gu, Incheon, 21674, KR)
OH, Beom Jin (308dong 1502ho, Hyundai Morningside 1-cha Apt. 46,,Saeun-ro 126beon-gil, Giheung-gu, Yongin-si, Gyeonggi-do, 17079, KR)
KIM, Rak Hyun (6403dong 1403ho, 215 Wiryejungang-ro,,Hanam-si, Gyeonggi-do, 13014, KR)
KIM, Sung Hwan (44dong 507ho, Jugong Apt. 310, Gaepo-ro,,Gangnam-gu, Seoul, 06321, KR)
Application Number:
KR2017/009984
Publication Date:
January 10, 2019
Filing Date:
September 12, 2017
Export Citation:
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Assignee:
POSCO ENGINEERING & CONSTRUCTION CO., LTD. (180 Daesong-ro, Nam-gu,Pohang-si, Gyeongsangbuk-do, 37863, KR)
International Classes:
C04B18/14; C04B20/00; C04B28/02; C04B40/02; E02D29/00; E02D29/045; E04B1/04; C04B111/20
Foreign References:
KR20150135738A2015-12-03
KR20120089881A2012-08-16
KR20160010085A2016-01-27
KR20170005669A2017-01-16
KR101571731B12015-11-25
Attorney, Agent or Firm:
JEONG, Nam Jin (2F. Hojeon Bldg, 67,Gangnam-daero 94-gil,,Gangnam-gu, Seoul, 06131, KR)
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