Hydrothermal Reaction Characteristics on the ALC of Pitchstone-Lime System (II) - Effect of the Various Gelling and Curing Conditions

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J. Korean Ceram. Soc. > Volume 31(2); 1994 > Article

Journal of the Korean Ceramic Society 1994;31(2): 194.

송지암-석회계 ALC에 대한 수열반응 특성(II) - 겔화 및 양생조건에 따른 영향

최병현, 김순환

국립공업기술원 요업기술원

Hydrothermal Reaction Characteristics on the ALC of Pitchstone-Lime System (II) - Effect of the Various Gelling and Curing Conditions

ABSTRACT

Pitchstone(Volcanic ejecta) reacts with CaO in hot water and increases its sedimentary volume by forming Ca(OH)2 and calcium silicate hydrates. ALC was prepared from the various gelling and curing conditions using the ratio of pitchstone/CaO was 2(CaO/SiO2 mol ratio=0.81), and then the products, crystalline phases and physical properties of ALC with experimental conditions was investigated. The crystalline phase of tobermorite with laths and plate type and the porosity were increased, the thermal conductivity was decreased with increasing gelling temperature and time. But modulus of rupture has maximum value when gelling time was 2 hrs. Othwrwise the bulk density nearly unchanged with increasing curing temperature, but the modulus of rupture was increased.