Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention relates to a polycarboxylic acid high-performance water reducing agent, which is a polycarboxylic acid molecule synthesized by isopentenol polyoxyethylene ether and an acrylic acid monomer, takes polyurethane as a side chain, and has the structural formula as follows: a is equal to 2-3, b is equal to 5-8, c is equal to 5-8, x is equal to 6-10, q is equal to 20-30, m is equal to 5-7, and n is equal to 15-25. The long side chain of polyurethane increases the steric hindrance of polycarboxylic acid, so that the slump of the concrete is kept good. When the polycarboxylic acid high-performance water reducing agent prepared by the invention is added into concrete for use, the compressive strength and the breaking strength are respectively improved by 63.18-68.16% and 90.20-98.04% in 28 days, the fluidity is 346-352 mm in 1 h and is improved by 25.82-28.00% compared with a blank group, the water reducing rate is improved by 38-39%, and the maximum deformation rate (shrinkage value) is reduced to 50 * 10 <-6 > from 450 * 10 <-6 > of the blank group.
一种聚羧酸高性能减水剂，所述聚羧酸高性能减水剂是以异戊烯醇聚氧乙烯醚和丙烯酸单体合成的聚羧酸分子，以聚氨酯作为侧链，其结构式为：其中，a＝2‑3，b＝5‑8，c＝5‑8，x＝6‑10，q＝20‑30，m＝5‑7，n＝15‑25。聚氨酯长侧链增加了聚羧酸的空间位阻，使得混凝土的坍落度保持良好。本发明制备的聚羧酸高性能减水剂加入混凝土使用，28天时的抗压强度和抗折强度分别提高了63.18‑68.16％和90.20‑98.04％，在1h时流动度为346‑352mm，较空白组提高了25.82‑28.00％，减水率提高了38‑39％，最大变形率(收缩值)从空白组的450*10‑6降低至50*10‑6。
The invention relates to a polycarboxylic acid high-performance water reducing agent, which is a polycarboxylic acid molecule synthesized by isopentenol polyoxyethylene ether and an acrylic acid monomer, takes polyurethane as a side chain, and has the structural formula as follows: a is equal to 2-3, b is equal to 5-8, c is equal to 5-8, x is equal to 6-10, q is equal to 20-30, m is equal to 5-7, and n is equal to 15-25. The long side chain of polyurethane increases the steric hindrance of polycarboxylic acid, so that the slump of the concrete is kept good. When the polycarboxylic acid high-performance water reducing agent prepared by the invention is added into concrete for use, the compressive strength and the breaking strength are respectively improved by 63.18-68.16% and 90.20-98.04% in 28 days, the fluidity is 346-352 mm in 1 h and is improved by 25.82-28.00% compared with a blank group, the water reducing rate is improved by 38-39%, and the maximum deformation rate (shrinkage value) is reduced to 50 * 10 <-6 > from 450 * 10 <-6 > of the blank group.
一种聚羧酸高性能减水剂，所述聚羧酸高性能减水剂是以异戊烯醇聚氧乙烯醚和丙烯酸单体合成的聚羧酸分子，以聚氨酯作为侧链，其结构式为：其中，a＝2‑3，b＝5‑8，c＝5‑8，x＝6‑10，q＝20‑30，m＝5‑7，n＝15‑25。聚氨酯长侧链增加了聚羧酸的空间位阻，使得混凝土的坍落度保持良好。本发明制备的聚羧酸高性能减水剂加入混凝土使用，28天时的抗压强度和抗折强度分别提高了63.18‑68.16％和90.20‑98.04％，在1h时流动度为346‑352mm，较空白组提高了25.82‑28.00％，减水率提高了38‑39％，最大变形率(收缩值)从空白组的450*10‑6降低至50*10‑6。
Polycarboxylic acid high-performance water reducing agent and preparation method thereof
一种聚羧酸高性能减水剂及其制备方法
LI NA (Autor:in)
11.11.2022
Patent
Elektronische Ressource
Chinesisch
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