Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Use of silane composite emulsion as anti-cracking reinforcing agent
Provided is use of a silane composite emulsion as an anti-cracking enhancer in a cement-based material. In the present disclosure, active groups on an isobutyltriethoxysilane molecule react with hydroxyl groups on a surface of a mortar to form a layered hydrophobic structure, slowing down a water loss inside the mortar of a cement-based material. The dehydration of butyl acrylate forms a network structure, which fills pores of the cement-based material, inhibits shrinkage of the cement-based material, and reduces the cracking caused by the shrinkage. Tetraethoxysilane can undergo hydrolysis at a room temperature to generate nano-silica with a large number of hydroxyl groups on a surface; and the nano-silica can undergo secondary hydration with calcium hydroxide in the cement to form a secondary hydration product C-S-H gel, thereby filling most of voids to make a structure of the cement hydration product denser, so as to increase a strength of the mortar. DRAWING -500 -400 -300 .- 200 -U-0% -100 -*-1% -A-2% -Y-3% 0 3 7 14 28 Time/d
Use of silane composite emulsion as anti-cracking reinforcing agent
Provided is use of a silane composite emulsion as an anti-cracking enhancer in a cement-based material. In the present disclosure, active groups on an isobutyltriethoxysilane molecule react with hydroxyl groups on a surface of a mortar to form a layered hydrophobic structure, slowing down a water loss inside the mortar of a cement-based material. The dehydration of butyl acrylate forms a network structure, which fills pores of the cement-based material, inhibits shrinkage of the cement-based material, and reduces the cracking caused by the shrinkage. Tetraethoxysilane can undergo hydrolysis at a room temperature to generate nano-silica with a large number of hydroxyl groups on a surface; and the nano-silica can undergo secondary hydration with calcium hydroxide in the cement to form a secondary hydration product C-S-H gel, thereby filling most of voids to make a structure of the cement hydration product denser, so as to increase a strength of the mortar. DRAWING -500 -400 -300 .- 200 -U-0% -100 -*-1% -A-2% -Y-3% 0 3 7 14 28 Time/d
Use of silane composite emulsion as anti-cracking reinforcing agent
LI SHAOCHUN (Autor:in) / XU SHILIN (Autor:in) / LIU ANG (Autor:in) / GENG YONGJUAN (Autor:in) / HOU DONGSHUAI (Autor:in) / ZHANG RUIYONG (Autor:in) / JIN ZUQUAN (Autor:in) / GAO SONG (Autor:in)
15.08.2024
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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