ELECTROCHEMICAL SENSOR WITH CONDUCTING POLYMER MODIFIED ELECTRODES FOR CHOLESTEROL DETECTION AND MANUFACTURING METHOD THE SAME

摘要

The present invention relates to a cement-based water cut-off material composition that can be used for various constructions such as a water cut-off construction, a waterproof construction, a ground reinforcement construction and the like. The cement-based water cut-off material composition comprises a first water cut-off material composition and a second water cut-off material composition. The first water cut-off material composition includes 15-85 wt% of Portland cement, 1-30 wt% of fly ash having high fineness, 1-20 wt% of blast furnace slag having high fineness, 1-20 wt% of bottom ash having high fineness, 1-20 wt% of anhydrite or gypsum hemihydrate, and 0.01-10 wt% of zeolite. The second water cut-off material composition includes 50-99 wt% of calcium aluminate (12CaO·7Al2O3) having high fineness or a magnesium sulfo-aluminate compound, 0.01-10 wt% of potassium aluminum sulfate, 0.01-10 wt% of magnesium oxide, 0.01-10 wt% of sodium silicate, 0.01-10 wt% of alkali metal silicate, 0.01-5 wt% of a polycarboxylic acid-based dispersant, and 0.01-5 wt% of aluminum powder. The cement-based water cut-off material composition has high strength and excellent durability. According to the present invention, the Na2_O content is lower than that of the prior cement-based water cut-off material composition. Therefore, the cement-based water cut-off material composition does not pollute underground water and is ecofriendly.