Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Water reducing agent composition for steam-curing-free concrete and preparation method thereof
The invention provides a water reducing agent composition for steam-curing-free concrete and a preparation method thereof. The water reducing agent composition comprises an early-strength polycarboxylate water reducing agent, a C-S-H crystal nucleus, a lithium salt, nanoparticles and a general early strength agent. The acid-ether ratio of the water reducing agent is 4:1-5:1, and the water reducing agent is formed by copolymerization of HPEG, acrylic acid, acrylamide, 2-acrylamide-2-methyl propanesulfonic acid, DMC or DAP. The nanoparticles are nano metal oxides, and the early strength agent comprises at least one inorganic early strength agent and an organic early strength agent. The preparation method comprises the following steps: 1, mixing tricalcium silicate with the inorganic early strength agent, the organic early strength agent and water to obtain a gel system containing C-S-H crystal nucleus; 2, adding a water reducing agent to obtain a dispersion liquid containing C-S-H crystal nucleus; 3, adding the nanoparticles and a lithium salt into a water reducing agent, and stirring to obtain a dispersion liquid containing the nanoparticles and the lithium salt; and 4, slowly adding the product obtained in the step 2 into the product obtained in the step 3 to obtain the water reducing agent composition for steam-curing-free concrete. The composition disclosed by the invention is good in early strength effect, good in concrete construction performance, free of steam curing, simple in process and beneficial to shortening the construction period.
提供免蒸养混凝土用减水剂组合物及制备方法，其包括早强型聚羧酸减水剂、C‑S‑H晶核、锂盐、纳米颗粒和通用早强剂。减水剂的酸醚比为4:1‑5:1，由HPEG和丙烯酸、丙烯酰胺、2‑丙烯酰胺‑2‑甲基丙磺酸、DMC或DAP共聚而成。纳米颗粒为纳米金属氧化物，早强剂包括至少一种无机早强剂和有机早强剂。其制备方法：一、将硅酸三钙和无机早强剂、有机早强剂和水混合得含C‑S‑H晶核的凝胶体系；二、加入减水剂，得含C‑S‑H晶核的分散液；三、将纳米颗粒和锂盐加入减水剂，搅拌得到含纳米颗粒和锂盐的分散液；四、将步骤二产物缓慢加入步骤三产物，得到免蒸养混凝土用减水剂组合物。本发明的组合物早强效果良好、混凝土施工性能良好，且能够免蒸养，工艺简单，有助于缩短工期。
Water reducing agent composition for steam-curing-free concrete and preparation method thereof
The invention provides a water reducing agent composition for steam-curing-free concrete and a preparation method thereof. The water reducing agent composition comprises an early-strength polycarboxylate water reducing agent, a C-S-H crystal nucleus, a lithium salt, nanoparticles and a general early strength agent. The acid-ether ratio of the water reducing agent is 4:1-5:1, and the water reducing agent is formed by copolymerization of HPEG, acrylic acid, acrylamide, 2-acrylamide-2-methyl propanesulfonic acid, DMC or DAP. The nanoparticles are nano metal oxides, and the early strength agent comprises at least one inorganic early strength agent and an organic early strength agent. The preparation method comprises the following steps: 1, mixing tricalcium silicate with the inorganic early strength agent, the organic early strength agent and water to obtain a gel system containing C-S-H crystal nucleus; 2, adding a water reducing agent to obtain a dispersion liquid containing C-S-H crystal nucleus; 3, adding the nanoparticles and a lithium salt into a water reducing agent, and stirring to obtain a dispersion liquid containing the nanoparticles and the lithium salt; and 4, slowly adding the product obtained in the step 2 into the product obtained in the step 3 to obtain the water reducing agent composition for steam-curing-free concrete. The composition disclosed by the invention is good in early strength effect, good in concrete construction performance, free of steam curing, simple in process and beneficial to shortening the construction period.
提供免蒸养混凝土用减水剂组合物及制备方法，其包括早强型聚羧酸减水剂、C‑S‑H晶核、锂盐、纳米颗粒和通用早强剂。减水剂的酸醚比为4:1‑5:1，由HPEG和丙烯酸、丙烯酰胺、2‑丙烯酰胺‑2‑甲基丙磺酸、DMC或DAP共聚而成。纳米颗粒为纳米金属氧化物，早强剂包括至少一种无机早强剂和有机早强剂。其制备方法：一、将硅酸三钙和无机早强剂、有机早强剂和水混合得含C‑S‑H晶核的凝胶体系；二、加入减水剂，得含C‑S‑H晶核的分散液；三、将纳米颗粒和锂盐加入减水剂，搅拌得到含纳米颗粒和锂盐的分散液；四、将步骤二产物缓慢加入步骤三产物，得到免蒸养混凝土用减水剂组合物。本发明的组合物早强效果良好、混凝土施工性能良好，且能够免蒸养，工艺简单，有助于缩短工期。
Water reducing agent composition for steam-curing-free concrete and preparation method thereof
一种免蒸养混凝土用减水剂组合物及其制备方法
CHEN XUEBING (Autor:in) / CHEN GANG (Autor:in) / YI KAICHUANG (Autor:in) / WU QIUZHEN (Autor:in)
16.04.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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