At present, for the precast concrete products, the production efficiency can be improved by accelerating the turnover of molds. For airport, expressway and other emergency repair projects, the early strength of concrete is required to be high. With the structural design of early strength polycarboxylic superplasticizer, Guangdong Redwall uses special catalysts to achieve highly regular monomer distribution of polycarboxylic acid, introduces large monomer of hydration promoting group, and uses superposition effect to prepare ultra-early strength polycarboxylic superplasticizer. The application of super early strength polycarboxylic superplasticizer can accelerate the early hydration of cement, shorten the cement setting time, and improve the early strength of concrete without affecting the durability of concrete. At the same time, it can ensure that the concrete has good construction performance, which is conducive to the low energy consumption, green economy and sustainable development of concrete engineering.

The main innovations of the project are as follows.

lUsing active polymerizable alcohols, ethylene oxide and epoxy halopropane as raw materials, an active intermediate obtained by ring opening polymerization, and quaternary ammonium compounds were introduced to prepare a cationic macromonomer with hydration promoting group.

lThe monomer distribution in polycarboxylic acid molecule was highly regular by using special catalyst, and the self-designed large monomer of hydration promoting group was introduced to prepare ultra early strength polycarboxylic acid water reducer by using superposition effect.

The super early strength polycarboxylic superplasticizer has been widely used in the production enterprises of prefabricated building components, segments and pipe piles because of its ultra early strength, good concrete adaptability and construction performance. In the production of prefabricated building components, it can realize the production mode of formwork removal twice a day. In PHC pipe pile production, it can support concrete curing without steam. It is conducive to the healthy and green development of precast concrete products industry.

Comparison of apparent pore distribution of test blocks

 (by this superplasticizer - other superplasticizer)

Comparison of apparent pore distribution of test blocks

 (by this superplasticizer - other superplasticizer)

Guangdong Redwall

http://www.redwall.com.cn/en/