A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Preparation method of concrete admixture based on C70 high-strength concrete broken pebble and gravel
The invention discloses a preparation method of a concrete admixture based on C70 high-strength concrete broken pebble and gravel, and the method comprises the following steps: adding unsaturated polyoxyethylene ether macromonomer and water in a mass ratio of 1: 3 into a reaction kettle at 25-30 DEG C, and performing stirring; after uniformly stirring, dropwise adding the material A and the material B at the same time, wherein the material A is a mixed aqueous solution of unsaturated anhydride or carboxylic acid, a reducing agent and a chain transfer agent, and the dropwise adding time is 3-3.5 h, the material B is an oxidizing agent aqueous solution, and dropwise adding for 2-2.5 hours; after dropwise adding, performing curing for 1 hour, adding a sodium hydroxide solution, adjusting the pH value to 5-7, and obtaining the concrete polycarboxylic acid admixture with the solid content of 40-45%. The concrete admixture based on the C70 high-strength concrete broken pebble and gravel does not need to be heated in the preparation process, energy is saved, pollution is reduced, the admixture is good in performance, and the compressive strength of the concrete can be improved when the concrete admixture is applied to the preparation process of the broken pebble and gravel concrete.
本发明公开了具体为基于C70高强混凝土碎卵石与碎石混凝土外加剂制备方法：在25‑30℃下，将不饱和聚氧乙烯醚大单体和水以质量比1:3加入反应釜，搅拌；搅拌均匀后同时滴加A料和B料，A料为不饱和酸酐或羧酸，还原剂及链转移剂的混合水溶液，滴加时间3‑3.5h；B料为氧化剂水溶液，滴加2‑2.5h；滴加完熟化1h，加入氢氧化钠溶液，调整ph值至5‑7，得到含固量为40‑45％的混凝土聚羧酸外加剂。本基于C70高强混凝土碎卵石与碎石混凝土外加剂制备过程中无需加热，且节约能源，减少污染，而且外加剂性能好，应用于碎卵石与碎石混凝土制备过程中，有助于提高混凝土的抗压强度。
Preparation method of concrete admixture based on C70 high-strength concrete broken pebble and gravel
The invention discloses a preparation method of a concrete admixture based on C70 high-strength concrete broken pebble and gravel, and the method comprises the following steps: adding unsaturated polyoxyethylene ether macromonomer and water in a mass ratio of 1: 3 into a reaction kettle at 25-30 DEG C, and performing stirring; after uniformly stirring, dropwise adding the material A and the material B at the same time, wherein the material A is a mixed aqueous solution of unsaturated anhydride or carboxylic acid, a reducing agent and a chain transfer agent, and the dropwise adding time is 3-3.5 h, the material B is an oxidizing agent aqueous solution, and dropwise adding for 2-2.5 hours; after dropwise adding, performing curing for 1 hour, adding a sodium hydroxide solution, adjusting the pH value to 5-7, and obtaining the concrete polycarboxylic acid admixture with the solid content of 40-45%. The concrete admixture based on the C70 high-strength concrete broken pebble and gravel does not need to be heated in the preparation process, energy is saved, pollution is reduced, the admixture is good in performance, and the compressive strength of the concrete can be improved when the concrete admixture is applied to the preparation process of the broken pebble and gravel concrete.
本发明公开了具体为基于C70高强混凝土碎卵石与碎石混凝土外加剂制备方法：在25‑30℃下，将不饱和聚氧乙烯醚大单体和水以质量比1:3加入反应釜，搅拌；搅拌均匀后同时滴加A料和B料，A料为不饱和酸酐或羧酸，还原剂及链转移剂的混合水溶液，滴加时间3‑3.5h；B料为氧化剂水溶液，滴加2‑2.5h；滴加完熟化1h，加入氢氧化钠溶液，调整ph值至5‑7，得到含固量为40‑45％的混凝土聚羧酸外加剂。本基于C70高强混凝土碎卵石与碎石混凝土外加剂制备过程中无需加热，且节约能源，减少污染，而且外加剂性能好，应用于碎卵石与碎石混凝土制备过程中，有助于提高混凝土的抗压强度。
Preparation method of concrete admixture based on C70 high-strength concrete broken pebble and gravel
基于C70高强混凝土碎卵石与碎石混凝土外加剂制备方法
WEI WEI (author) / MI TINGTING (author) / MIAO XIAOHONG (author) / QIN KUN (author) / JING WEIFU (author)
2021-06-08
Patent
Electronic Resource
Chinese
High-strength concrete admixture and preparation method thereof
| European Patent Office | 2024
High-strength pervious concrete admixture and pervious concrete
| European Patent Office | 2021
Concrete admixture, preparation method thereof and concrete added with concrete admixture
| European Patent Office | 2020