Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of internal curing cement-based material with in-situ generated organic-inorganic core-shell structure
The invention discloses a method for preparing an internal curing cement-based material with an in-situ generated organic-inorganic core-shell structure, which comprises the following steps of: absorbing water in silica sol by using the super absorbent property of super absorbent resin, and enabling silica sol nanoparticles to form a surface nano-modified core-shell structure on the surfaces of the super absorbent resin particles in the water absorption process, so as to prepare the internal curing cement-based material with the in-situ generated organic-inorganic core-shell structure. The obtained surface nano-modified super absorbent resin is further subjected to isolation treatment by adopting an isolation material, then the surface nano-modified super absorbent resin is doped into high-performance and ultra-high-performance cement-based materials, and in the cement hydration hardening process, a surface nano-silicon dioxide shell layer reacts with cement hydration product calcium hydroxide to form a hard C-S-H gel shell layer, so that the surface nano-modified super absorbent resin is formed. Therefore, an organic-inorganic core-shell structure is formed in the hardened cement-based material in situ, and the defect that the strength of the hardened cement-based material is reduced due to the fact that the introduced super absorbent resin collapses to form pores in the hydration hardening process of the cement-based material is overcome.
本发明公开了一种原位生成有机‑无机核壳结构的内养护水泥基材料的制备方法，利用超吸水树脂的超高吸水性，将超吸水树脂在硅溶胶中吸水,在吸水过程中使硅溶胶纳米粒子在超吸水树脂颗粒表面形成表面纳米改性核壳结构，所得表面纳米改性超吸水树脂进一步采用隔离材料进行隔离处理，然后在高性能与超高性能水泥基材料中进行掺加，在水泥水化硬化过程中，表面的纳米二氧化硅壳层与水泥水化产物氢氧化钙反应，形成坚硬的C‑S‑H凝胶壳层，从而在硬化水泥基材料中原位形成有机‑无机核壳结构，有助于弥补因引入超吸水树脂在水泥基材料水化硬化过程中发生坍陷形成孔隙而导致的硬化水泥基材料强度下降。
Preparation method of internal curing cement-based material with in-situ generated organic-inorganic core-shell structure
The invention discloses a method for preparing an internal curing cement-based material with an in-situ generated organic-inorganic core-shell structure, which comprises the following steps of: absorbing water in silica sol by using the super absorbent property of super absorbent resin, and enabling silica sol nanoparticles to form a surface nano-modified core-shell structure on the surfaces of the super absorbent resin particles in the water absorption process, so as to prepare the internal curing cement-based material with the in-situ generated organic-inorganic core-shell structure. The obtained surface nano-modified super absorbent resin is further subjected to isolation treatment by adopting an isolation material, then the surface nano-modified super absorbent resin is doped into high-performance and ultra-high-performance cement-based materials, and in the cement hydration hardening process, a surface nano-silicon dioxide shell layer reacts with cement hydration product calcium hydroxide to form a hard C-S-H gel shell layer, so that the surface nano-modified super absorbent resin is formed. Therefore, an organic-inorganic core-shell structure is formed in the hardened cement-based material in situ, and the defect that the strength of the hardened cement-based material is reduced due to the fact that the introduced super absorbent resin collapses to form pores in the hydration hardening process of the cement-based material is overcome.
本发明公开了一种原位生成有机‑无机核壳结构的内养护水泥基材料的制备方法，利用超吸水树脂的超高吸水性，将超吸水树脂在硅溶胶中吸水,在吸水过程中使硅溶胶纳米粒子在超吸水树脂颗粒表面形成表面纳米改性核壳结构，所得表面纳米改性超吸水树脂进一步采用隔离材料进行隔离处理，然后在高性能与超高性能水泥基材料中进行掺加，在水泥水化硬化过程中，表面的纳米二氧化硅壳层与水泥水化产物氢氧化钙反应，形成坚硬的C‑S‑H凝胶壳层，从而在硬化水泥基材料中原位形成有机‑无机核壳结构，有助于弥补因引入超吸水树脂在水泥基材料水化硬化过程中发生坍陷形成孔隙而导致的硬化水泥基材料强度下降。
Preparation method of internal curing cement-based material with in-situ generated organic-inorganic core-shell structure
一种原位生成有机-无机核壳结构的内养护水泥基材料的制备方法
OU TIANAN (Autor:in) / FANG KUN (Autor:in) / WU HAOTIAN (Autor:in) / CAI JIALE (Autor:in) / KONG DEYU (Autor:in) / HE KUI (Autor:in) / PAN RONGWEI (Autor:in) / LIANG YAQIAN (Autor:in)
23.07.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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