발열성 시멘트 모르타르 또는 콘크리트 조성물,발열체 및 그의 제조방법
    1.
    发明授权
    발열성 시멘트 모르타르 또는 콘크리트 조성물,발열체 및 그의 제조방법 失效
    放热水泥砂浆或混凝土组合物,加热元件及其制造方法

    公开(公告)号:KR100328539B1

    公开(公告)日:2002-09-04

    申请号:KR1019970024179

    申请日:1997-06-11

    Abstract: PURPOSE: A heat emitting cement mortar or concrete composition, a heating element and its preparation method are provided, to obtain a cement heating element having a suitable electrical resistance without using expensive carbon fiber or a large amount of graphite as a conducting material and a water-reducing agent. CONSTITUTION: The heat emitting cement mortar or concrete composition comprises the powder comprising 100 parts by weight of Portland cement and 35-90 parts by weight of crystalline graphite; and 10-35 wt% of water based on the total weight of the powder. Preferably the graphite is amorphous graphite, has a particle size of 0.5 mm or less and/or has a purity of 70-90%. The heating element is prepared by pressure compression molding the composition with a pressure 10-80 kg/cm2 or vibration compression molding the composition with a frequency of 10-30 Hz and a pressure of 5-10 kg/cm2.

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