High-strength waterproof gypsum building block and preparation method thereof

Abstract

The invention discloses a high-strength waterproof gypsum building block and a preparation method thereof; the high-strength waterproof gypsum building block comprises the components: a gypsum powder, octadecyl trimethyl ammonium chloride, a sepiolite powder, a montmorillonite powder, hydrogen-containing silicone oil and water. The preparation method comprises the following steps: 1, adding 0.4-0.6 part by weight of the hydrogen-containing silicone oil into 40-45 parts by weight of water; 2, then adding 0.005-0.01 part by weight of octadecyl trimethyl ammonium chloride; 3, then adding 50-55 parts by weight of an evenly-mixed water-mixed gypsum powder, 3-10 parts by weight of the sepiolite powder and 3-5 parts by weight of the montmorillonite powder into the liquid of the step 2; and 4, pouring the mixture into a mold box, forming, demolding, curing with the curing time of 72 h, and thus obtaining the high-strength waterproof gypsum building block. The high-strength waterproof gypsum building block has the advantages: 1, the waterproof effect reaches the 2-hour water absorption rate of less than or equal to 5%, and the conversion coefficient reaches more than or equal to 0.75; and 2, the strength is increased by 2-8 times, and the toughness is increased.

Description

technical field [0001] The invention relates to a high-strength waterproof gypsum block and a preparation method thereof, belonging to the field of building materials. Background technique [0002] Gypsum blocks were introduced into China in the 1980s. In the past 30 years, although gypsum blocks have not been widely used like other cement wall materials, they have also developed steadily. Since 2000, with the advancement of China's wall reform, there has been a space for the development of new wall materials such as gypsum blocks, and it is also the initial period of transition from original manual production to mechanized production. After 2004, Shandong, Hubei, Dozens of mechanized equipment manufacturers have sprung up in Sichuan, Beijing, Hebei and Inner Mongolia, with an annual output of 20 million m 2 . [0003] Gypsum block is a kind of green wall material with relatively large amount of application. However, its own shortcomings such as high water absorption and ...

AI Technical Summary

Problems solved by technology

[0003] Gypsum block is a kind of green wall material with relatively large application volume. However, its own shortcomings such as high water absorption and low softening coefficient limit the application range of gypsum block.