To provide a manufacturing method of a concrete product capable of manufacturing the concrete product, which has a synthetic resin in its inner peripheral surface and a steel material in its outer peripheral surface, enhanced in productivity, improving a work environment, producing no sludge and superior in the close adhesiveness of the product.
In the manufacturing method of the concrete product having the synthetic resin in its inner peripheral surface and the steel material in its outer peripheral surface, concrete with a water/bonding material ratio of 30% or below is prepared by adding silica fume based on silicon dioxide and containing zirconium oxide and an expanding agent and the prepared concrete is cast in the space between the inside frame consisting of the synthetic resin constituting the inner surface side of the concrete product and an outside frame comprising the steel material constituting the outer surface side of the concrete product to mold concrete in the state that the inside and outside frames are set stationarily.
OISHI HIDEO
KITAGAWA AKIRA
YAMASHITA MASAHIRO
KURIMOTO CONCRETE IND LTD
| JPH07291693A | 1995-11-07 | |||
| JP2002356361A | 2002-12-13 |
Seiichi Yakumaru
Hiroaki Nakatani
Tokuya Iwata
Next Patent: CONCRETE PRODUCT AND ITS MANUFACTURING METHOD