Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Calcium silicate hydrate crystal nucleus early-strength polycarboxylic acid water reducer and preparation method thereof
The invention discloses a calcium silicate hydrate crystal nucleus early-strength polycarboxylic acid water reducer and a preparation method thereof, and the calcium silicate hydrate crystal nucleus early-strength polycarboxylic acid water reducer is prepared from the following components in parts by weight: 480-500 parts of polyether macromonomer, 45-60 parts of silane coupling agent, 45-60 parts of small monomer, 60-80 parts of crystal nucleus solution, 1-3 parts of initiator, 1-3 parts of reducing agent, and 4-6 parts of a molecular weight regulator. According to the invention, the silane group is grafted to the main chain of the polycarboxylic acid water reducer, and then chemical adsorption is generated by utilizing the condensation effect of the hydrolyzed silane group and the hydroxyl group on the surface of the hydrated calcium silicate without occupying the adsorption site of the polycarboxylic acid water reducer. The crystal nucleus early strength type polycarboxylic acid water reducer jointly acts on the surfaces of cement particles through covalent bonds, hydrogen bonds, Van der Waals' force and the like, has a very strong seed crystal effect on cement hydration while giving full play to the water reducing effect, remarkably promotes the early strength development of mortar or concrete, and overcomes the defects in the prior art.
本发明公开了一种水化硅酸钙晶核早强型聚羧酸减水剂及其制备方法，以重量份计，所述晶核早强型聚羧酸减水剂由以下组分制备而成：聚醚大单体480－500份，硅烷偶联剂45－60份，小单体45－60份，晶核溶液60－80份，引发剂1－3份，还原剂1－3份，分子量调节剂4－6份。本发明通过先将硅烷基团接枝至聚羧酸减水剂主链上，再利用硅烷基团水解后与水化硅酸钙表面羟基的缩合作用产生化学吸附，并不占据聚羧酸减水剂的吸附位点，本发明的晶核早强型聚羧酸减水剂通过共价键、氢键、范德华力等作用共同作用于水泥颗粒表面，在充分发挥减水作用的同时，对水泥水化具有极强的晶种效果，显著促进了砂浆或混凝土的早期强度发展，克服了现有技术的不足。
Calcium silicate hydrate crystal nucleus early-strength polycarboxylic acid water reducer and preparation method thereof
The invention discloses a calcium silicate hydrate crystal nucleus early-strength polycarboxylic acid water reducer and a preparation method thereof, and the calcium silicate hydrate crystal nucleus early-strength polycarboxylic acid water reducer is prepared from the following components in parts by weight: 480-500 parts of polyether macromonomer, 45-60 parts of silane coupling agent, 45-60 parts of small monomer, 60-80 parts of crystal nucleus solution, 1-3 parts of initiator, 1-3 parts of reducing agent, and 4-6 parts of a molecular weight regulator. According to the invention, the silane group is grafted to the main chain of the polycarboxylic acid water reducer, and then chemical adsorption is generated by utilizing the condensation effect of the hydrolyzed silane group and the hydroxyl group on the surface of the hydrated calcium silicate without occupying the adsorption site of the polycarboxylic acid water reducer. The crystal nucleus early strength type polycarboxylic acid water reducer jointly acts on the surfaces of cement particles through covalent bonds, hydrogen bonds, Van der Waals' force and the like, has a very strong seed crystal effect on cement hydration while giving full play to the water reducing effect, remarkably promotes the early strength development of mortar or concrete, and overcomes the defects in the prior art.
本发明公开了一种水化硅酸钙晶核早强型聚羧酸减水剂及其制备方法，以重量份计，所述晶核早强型聚羧酸减水剂由以下组分制备而成：聚醚大单体480－500份，硅烷偶联剂45－60份，小单体45－60份，晶核溶液60－80份，引发剂1－3份，还原剂1－3份，分子量调节剂4－6份。本发明通过先将硅烷基团接枝至聚羧酸减水剂主链上，再利用硅烷基团水解后与水化硅酸钙表面羟基的缩合作用产生化学吸附，并不占据聚羧酸减水剂的吸附位点，本发明的晶核早强型聚羧酸减水剂通过共价键、氢键、范德华力等作用共同作用于水泥颗粒表面，在充分发挥减水作用的同时，对水泥水化具有极强的晶种效果，显著促进了砂浆或混凝土的早期强度发展，克服了现有技术的不足。
Calcium silicate hydrate crystal nucleus early-strength polycarboxylic acid water reducer and preparation method thereof
一种水化硅酸钙晶核早强型聚羧酸减水剂及其制备方法
YU XIANG (Autor:in) / LI XIANYONG (Autor:in) / GUAN SUMIN (Autor:in) / REN CHUNRONG (Autor:in) / JING YAO (Autor:in) / WU XIN (Autor:in) / PENG WENBIN (Autor:in) / JIANG XIAOJUN (Autor:in) / GUI GENSHENG (Autor:in) / ZHANG RONGHUA (Autor:in)
08.02.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C08F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, erhalten durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
/
C04B
Kalk
,
LIME
/
C08K
Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe
,
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS
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