A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
ROADBED MATERIAL PRODUCTION METHOD
Provided is a method of producing a roadbed material capable of simply producing a roadbed material from which less hexavalent chromium leaches out through use of a crushed product of a cementitious hardened body containing hexavalent chromium as a raw material.The method of producing a roadbed material through use of a crushed product of a cementitious hardened body containing hexavalent chromium as a raw material, the method comprising a carbonation treatment step of subjecting the crushed product of the cementitious hardened body to carbonation treatment with a carbon dioxide-containing gas having a temperature of from 50°C to 140°C and a water content of 1.5% or more to obtain the roadbed material from which less hexavalent chromium leaches out than before the treatment. Preferably, the method of producing a roadbed material, further comprising, before the carbonation treatment step, a crushing step of crushing the cementitious hardened body containing hexavalent chromium to obtain a crushed product consisting of grains having a grain size of 100 mm or less at a ratio of 50 mass% or more and having a grain size of 2.36 mm or less at a ratio of 1 mass% or more.
ROADBED MATERIAL PRODUCTION METHOD
Provided is a method of producing a roadbed material capable of simply producing a roadbed material from which less hexavalent chromium leaches out through use of a crushed product of a cementitious hardened body containing hexavalent chromium as a raw material.The method of producing a roadbed material through use of a crushed product of a cementitious hardened body containing hexavalent chromium as a raw material, the method comprising a carbonation treatment step of subjecting the crushed product of the cementitious hardened body to carbonation treatment with a carbon dioxide-containing gas having a temperature of from 50°C to 140°C and a water content of 1.5% or more to obtain the roadbed material from which less hexavalent chromium leaches out than before the treatment. Preferably, the method of producing a roadbed material, further comprising, before the carbonation treatment step, a crushing step of crushing the cementitious hardened body containing hexavalent chromium to obtain a crushed product consisting of grains having a grain size of 100 mm or less at a ratio of 50 mass% or more and having a grain size of 2.36 mm or less at a ratio of 1 mass% or more.
ROADBED MATERIAL PRODUCTION METHOD
VERFAHREN ZUR HERSTELLUNG VON STRASSENBETTMATERIAL
PROCÉDÉ DE PRODUCTION DE MATÉRIAU DE REVÊTEMENT DE ROUTE
NOZAKI TAKAHITO (author) / FUKUOKA AOI (author) / ICHITSUBO KOUKI (author) / HAYAKAWA TAKAYUKI (author) / NOGUCHI TAKAFUMI (author) / WANG DIANCHAO (author)
2023-12-20
Patent
Electronic Resource
English
IPC:
E01C
Bau von Straßen, Sportplätzen oder dgl., Decken dafür
,
CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE