What is the disadvantages of excessive addition of water reducer to concrete?
Water reducer is a commonly used admixture in concrete. However, if added in excessive amounts, it will have various negative impacts on the performance of the concrete, the construction process, and the final quality.
The Application of Polycarboxylate Superplasticizer in High-performance Concrete
Using polycarboxylate-based superplasticizer high performance water reducer as an admixture for high-performance concrete, it exhibits high water-reducing performance even at a low dosage. Experiments have shown that the polycarboxylate-based high-efficiency water reducer can significantly reduce the viscosity of concrete and effectively control the slump of concrete. The use of polycarboxylate-based superplasticizer high performance water reducer has a certain retardation effect on concrete setting. Comparative experiments have found that the setting time of concrete using polycarboxylate-based superplasticizer high performance water reducer is longer than that using sulfonated naphthalene-based superplasticizer high range water reducer. After 28 days, the concrete strength of using polycarboxylate-based superplasticizer high performance water reducer is more than 10% higher than that of using sulfonated naphthalene-based superplasticizer high range water reducer. The experiment also proves that when using polycarboxylate-based superplasticizer high performance water reducer, adding defoamer at the same time can reduce the air content of concrete and improve the strength of concrete.
Naphthalene-based Superplasticizer(SNF): A classic formula, a reliable choice in construction sites
In the field of concrete admixtures, with the continuous emergence of new materials, the market products have become increasingly diverse. However, there is a "veteran" that still holds a position in numerous construction projects - it is the naphthalene-based high range water reducer.
The Application of Polycarboxylate Superplasticizer/PCE in Gypsum
When the dosage of the polycarboxylate superplasticizer/PCE high-efficiency water reducer is 0.2% to 0.3% of the cementitious material's mass, the water reduction rate can reach 25% to 45%. It is generally believed that the polycarboxylate superplasticizer/PCE high-efficiency water reducer has a comb-like structure.
What raw materials should be selected for formulating polycarboxylate superplasticizer water reducer?
It has to be said that in recent years, the synthesis technology of polycarboxylate suerplasticizer mother liquor has become increasingly mature through several updates and iterations, from the high-temperature esterification process that must be used with pure water to the normal-temperature method of tap water. The synthesis threshold of polycarboxylate water reducer has been greatly reduced. Thanks to this, most of the mother liquors on the market have similar performance, providing a relatively common communication basis for compounding technology. Now the raw materials for compounding polycarboxylate water reducer can be roughly divided into the following categories: polycarboxylate mother liquor, retarder, defoamer, air entraining agent, water retaining agent, antifreeze agent, and early strength agent. The types of various raw materials are complicated and diverse. The author adheres to the viewpoint of not looking at advertisements but looking at the efficacy. Focus on introducing the more commonly used types that are easy to adapt to operation.
How to formulate the Polycarboxylate Superplasticizer high performance water reducer?
As the latest generation of high-performance water reducer, polycarboxylic acid water reducer/Polycarboxylate Superplasticizer is different from traditional ordinary water reducer. It has strong dispersibility in concrete, high water reduction rate and small slump loss of concrete. It is a major breakthrough in the history of water reducer, so it will become the focus of researchers' in-depth optimization research in the future.
What are the problems faced by polycarboxylic acid water reducers in application?
The construction industry has always been regarded as one of the key industries that pollute the environment. In the past decade, China's construction scale has become larger and larger. At the same time, modern large-scale projects have put forward higher and higher requirements on the comprehensive performance of concrete. Therefore, concrete must be developed in the direction of green, economic, high-strength, and durability. Therefore, concrete admixtures including high-efficiency water-reducing agents will also play an important role in future projects.
What's the performance of Polycarboxylic Acid High Performance Superplasticizer Liquid?
Polycarboxylic acid high-performance water reducer/Polycarboxylate Superplasticizer Liquid is the latest leading product at home and abroad, and is the first choice for modern commercial mixing stations.
Dispersing Agent NNO-Leveling Agent in Leather Dyeing
Dyeing is an important process in the production of light leather. Through dyeing, leather can present various bright colors and increase the variety of colors to suit various uses. Leather dyeing not only needs to give leather a bright and pure hue, but also requires the color to be as uniform as possible and high dyeing fastness.
How is the performance of Dispersant NNO?
Our Dispersant NNO is Acid-resistant, alkali-resistant, heat-resistant, hard water-resistant, inorganic salt-resistant, can be used with anionic and non-ionic surfactants.