Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Polycarboxylate superplasticizer capable of reducing adsorbability of reclaimed material and preparation method thereof
The invention discloses a polycarboxylic acid water reducing agent capable of reducing the adsorbability of a reclaimed material and a preparation method of the polycarboxylic acid water reducing agent. The polycarboxylic acid water reducing agent is prepared from 30%-35% of acrylic macromonomer, 55%-60% of water, 0%-0.5% of hydrogen peroxide, 3%-5% of acrylic acid, 0%-0.5% of hydroxyethyl acrylate, 0%-0.5% of mercapto propionic acid, 0%-0.5% of a catalyst, 0%-0.5% of vitamin C, 1%-5% of sodium hydroxide, 0%-0.5% of a retarder and 0%-0.5% of an air entraining agent. In the hydration process of cement, after polycarboxylic acid is added, PCE molecules are attached to the surfaces of cement particles, and polar groups such as sulfite ions, carboxyl ions and hydroxyl on side chains carry negative charges and are in like-pole repulsion with the cement particles, so that the cement particles are dispersed to a certain extent, water molecules are released, and the cement particles are dispersed to a certain extent. Therefore, the flowability of cement paste is improved, the stirring time is shortened, the water-reducing rate is improved, the adaptability of the cement paste to cement and gravel is improved, and the sensitivity of a polycarboxylic acid water reducer is reduced.
本发明公开了一种能够降低再生料吸附性的聚羧酸减水剂及其制备方法，包括如下组分制成：按重量份数计，丙大单体30％‑35％、水55％‑60％、双氧水0％‑0.5％、丙烯酸3％‑5％、丙烯酸羟乙酯0％‑0.5％、疏基丙酸0％‑0.5％、催化剂0％‑0.5％、维生素C0％‑0.5％、氢氧化钠1％‑5％、缓凝剂0％‑0.5％和引气剂0％‑0.5％，本发明该该聚羧酸减水剂内加入丙烯酸作为减水剂，在水泥的水化过程中，加入聚羧酸后，水泥粒子的表面附着上了PCE分子，侧链上的极性基团如亚硫酸根离子、羧基离子、羟基会带有负电荷，与水泥颗粒发生同性相斥，使得水泥颗粒一定程度地分散开，释放水分子，从而提高水泥浆体的流动性、减少搅拌时间、提高减水率，提高其对水泥砂石的适应性，降低聚羧酸减水剂的敏感度。
Polycarboxylate superplasticizer capable of reducing adsorbability of reclaimed material and preparation method thereof
The invention discloses a polycarboxylic acid water reducing agent capable of reducing the adsorbability of a reclaimed material and a preparation method of the polycarboxylic acid water reducing agent. The polycarboxylic acid water reducing agent is prepared from 30%-35% of acrylic macromonomer, 55%-60% of water, 0%-0.5% of hydrogen peroxide, 3%-5% of acrylic acid, 0%-0.5% of hydroxyethyl acrylate, 0%-0.5% of mercapto propionic acid, 0%-0.5% of a catalyst, 0%-0.5% of vitamin C, 1%-5% of sodium hydroxide, 0%-0.5% of a retarder and 0%-0.5% of an air entraining agent. In the hydration process of cement, after polycarboxylic acid is added, PCE molecules are attached to the surfaces of cement particles, and polar groups such as sulfite ions, carboxyl ions and hydroxyl on side chains carry negative charges and are in like-pole repulsion with the cement particles, so that the cement particles are dispersed to a certain extent, water molecules are released, and the cement particles are dispersed to a certain extent. Therefore, the flowability of cement paste is improved, the stirring time is shortened, the water-reducing rate is improved, the adaptability of the cement paste to cement and gravel is improved, and the sensitivity of a polycarboxylic acid water reducer is reduced.
本发明公开了一种能够降低再生料吸附性的聚羧酸减水剂及其制备方法，包括如下组分制成：按重量份数计，丙大单体30％‑35％、水55％‑60％、双氧水0％‑0.5％、丙烯酸3％‑5％、丙烯酸羟乙酯0％‑0.5％、疏基丙酸0％‑0.5％、催化剂0％‑0.5％、维生素C0％‑0.5％、氢氧化钠1％‑5％、缓凝剂0％‑0.5％和引气剂0％‑0.5％，本发明该该聚羧酸减水剂内加入丙烯酸作为减水剂，在水泥的水化过程中，加入聚羧酸后，水泥粒子的表面附着上了PCE分子，侧链上的极性基团如亚硫酸根离子、羧基离子、羟基会带有负电荷，与水泥颗粒发生同性相斥，使得水泥颗粒一定程度地分散开，释放水分子，从而提高水泥浆体的流动性、减少搅拌时间、提高减水率，提高其对水泥砂石的适应性，降低聚羧酸减水剂的敏感度。
Polycarboxylate superplasticizer capable of reducing adsorbability of reclaimed material and preparation method thereof
一种能够降低再生料吸附性的聚羧酸减水剂及其制备方法
CHEN JIALI (Autor:in) / WU WEIFENG (Autor:in) / HE TAO (Autor:in) / ZHANG YAYUN (Autor:in) / SHI ZHENHUA (Autor:in)
20.09.2024
Patent
Elektronische Ressource
Chinesisch
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