The main component of polycarboxylate water reducing agent is polycarboxylate. This series of water reducing agents have excellent performance in many aspects, such as , wide adaptability, high water reduction rate, good slump protection and low alkali content which can greatly improve the performance of concrete.
polycarboxylate superplasticizers cement has high workability and durability. It can be widely used in ordinary concrete, pumped concrete, super-fluid self-compacting high-strength and high-performance concrete, especially in the high durability of high-performance concrete In terms of excellent performance, the qualitative index of the water-reducing agent and the performance of the mixed concrete can reach the level of similar products at home and abroad.
The key technology of application of polycarboxylic acid water reducer
In recent years, polycarboxylate superplasticizers cement has been widely used in many construction projects in China. Modern concrete has a very high requirement for external functional additives, so poly carboxylic acid water reducer in the addition of concrete system, it should consider the following several aspects of the key technology.
1.Compatibility technology of polycarboxylic acid system. Because of the special structure of polycarboxylic acid superplasticizer, it cannot be stored and used together with other superplasticizers, especially naphthalene superplasticizer. Need and different types of water reducer used alternately, it is necessary to carefully clean the relevant containers to prevent cross-contamination of the quality of concrete. The adsorption performance of superplasticizer is not the same because of different cement varieties. Because the compatibility range of polycarboxylic acid superplasticizer in cement is relatively narrow, the compatibility is not good, so it is necessary to increase its dosage or use different kinds of cement to effectively solve this problem.
The retarding technology of polycarboxylic acid water reducer. In the process of construction, because the retarding time is short, the use of retarding agent can effectively extend the plasticity of concrete. But also want to consider the incompatibility of both, avoid the decrease of concrete performance.
2.Air content control. Poly carboxylic acid water reducer air entrain effect is very good, can be used together with defoaming agent, air entrain agent and so on. The gas content of concrete can be controlled and its workability and durability can be improved by first removing and then drawing.
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