Views: 29 Author: Sam Lee Publish Time: 2019-08-02 Origin: Site Inquire
In the past few decades, significant progress has been made in concrete technology, primarily driven by the introduction of highly improved concrete with specific properties and characteristics, including self-compacting concrete and high performance concrete, etc. Organic-based admixtures have played a key role, as they are even more substantial than cement in such developments.
In the early 19th century, dispersive admixtures were used. However, in the 1960s, sulphonated melamine formaldehydes and analogous naphthalene derivatives were introduced. Nowadays, new admixtures based on polycarboxylate ethers are being developed. Polycarboxylate ethers possess structural characteristics that provide more fluid concrete, which is more resistant to segregation and exudation as compared to that prepared with the previously known superplasticizers. Polycarboxylate ethers have been commonly utilized to enhance the flow ability of cementitious materials. Moreover, polycarboxylate ether is one of the most effective types of plasticizers, water reducer, and disperser which promotes excellent flow ability, high strength, workability, and pump ability, and efficient dispersion for gypsum, cement, and ceramic materials.
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