Beijing Dongke United Technologies Co.,Ltd.

Admixture dosage in concrete?

What is polycarboxylate superplasticizer?

Polycarboxylate superplasticizer is a kind of concrete admixture which can reduce the water consumption of mixing under the condition that the slump of concrete is kept basically unchanged. Most of them belong to anionic surfactants, such as lignin sulfonate and naphthalene sulfonate formaldehyde polymer. After adding the concrete mixture, it has a dispersing effect on the cement particles, which can improve its workability, reduce the unit water consumption, and improve the fluidity of the concrete mixture; or reduce the unit cement dosage and save cement.

Appearance is divided into liquid and powder. The solid content of the liquid agent is generally 20%, 40% (also known as mother liquor), 60%, The solid content of powder is generally 98%.

According to the water-reducing and water-reducing ability of water-reducing agent, it is divided into ordinary water-reducing agent (also known as plasticizer, water-reducing rate is not less than 8%, represented by lignin sulfonates ), high-efficiency water-reducing agent ( Also known as superplasticizer, water reduction rate is not less than 14%, including naphthalene series, melamine series, sulfamate series, aliphatic series, etc. ) and high performance water reducing agent (water reduction rate is not less than 25 %, Represented by polycarboxylic acid water-reducing agent [2]), and divided into early-strength type, standard type and retarding type respectively.

Polycarboxylic acid-based high-performance water-reducing agent is a kind of concrete superplasticizer (water-reducing agent) with the most cutting-edge, the highest technology content, the best application prospect and the best comprehensive performance in the world. Polycarboxylic acid-based high-performance water-reducing agent is a compound product of carboxylic acid grafted multi-component copolymer and other effective additives. With similar products at home and abroad

The product performance comparison shows that the polycarboxylic acid-based high-performance water-reducing agent has reached the international advanced level in terms of technical performance indicators and cost performance.