Sulphonated Melamine Formaldehyde (SMF)

1. Highly efficient water reducing admixture. SMF sulphonated melamine formaldehyde is a concrete water water with excellent performance. It can be adsorbed on the surface of cement particles and disperse the cement particles through electrostatic repulsion and steric hindrance effect, thereby significantly reducing the amount of mixing water without changing the slump of concrete. For example, when formulating high-performance concrete, using SMF superplasticizer can reduce the water-cement ratio to about 0.3 – 0.4, greatly improving the strength and durability of concrete. At the same time, SMF superplasticizer can also effectively improve the working properties of concrete, such as fluidity, cohesion and water retention, which is very beneficial for construction operations such as concrete pumping, pouring and vibration. It is widely used in large concrete projects such as high-rise buildings, bridges, and tunnels.

2. Enhancers. In addition to its water-reducing effect, SMF superplasticizer promotes the hydration reaction of cement. Because it disperses cement particles more evenly, increases the contact area between cement and water, accelerates the hydration process, and thereby improves the early and later strength of concrete. For precast concrete components, such as precast beams, precast columns, etc., using SMF can shorten the steam curing time or demoulding time of the components, improve the turnover efficiency of the molds, and ensure that the strength of the components meets the design requirements.

• High water reduction rate. SMF superplasticizer can significantly reduce the water consumption for concrete mixing. The water-reducing rate is usually greater than 25%. Under the same water-cement ratio, it can significantly increase the slump of concrete and effectively improve the working performance of concrete.
• Good early strength effect. Melamine superplasticizer can accelerate the hydration reaction of cement, improve the early strength of concrete, and make the concrete reach a higher strength value in a shorter time. It is especially suitable for concrete projects with high early strength requirements, such as prefabricated component production, winter construction, etc. It can speed up the construction progress and improve the turnover rate of formwork.
• Significant enhancement. Through good dispersion, the cement particles are fully hydrated, thereby improving the long-term strength of concrete. High-strength concrete and high-performance concrete can be formulated to meet the needs of high-rise buildings, bridges, tunnels and other projects that require high concrete strength and durability. 
• Good slump retention. Compared with some traditional water-reducing agents, such as naphthalene-based water-reducing agents, the slump loss of SMF superplasticizer over time is relatively small, and it can maintain the slump of concrete for a long time, making the concrete more stable during transportation and transportation. It has good fluidity and stability during pouring and vibration, which is beneficial to ensuring the construction quality of concrete.
• Strong adaptability. It has strong adaptability to different varieties and different strength levels of cement. It can effectively improve concrete workability problems caused by fluctuations in cement quality or poor aggregate quality, improve the stability of concrete, and can be widely used in various applications. in cement-based materials.
• Low bleed air volume. The amount of air introduced into the concrete is small, which generally does not have an adverse effect on the strength and durability of the concrete. It can ensure the compactness and impermeability of the concrete and is suitable for projects that require low air content in concrete.
• Good compatibility with other admixtures. It can be used in combination with other admixtures such as retarder, air-entraining agent, early strength agent, etc. By adjusting the compound proportion, it can meet the diverse requirements for concrete performance in different projects, such as the preparation of retarder, high-efficiency water reducing agent, early strength admixture, etc. Water reducing agent, etc., expanding its application scope.
• Environmental performance. SMF water reducing agent is a water-soluble polymer compound that does not produce harmful gases or other pollutants during the use of concrete. Moreover, because it can reduce cement consumption (by reducing the water-cement ratio), it indirectly reduces carbon dioxide emissions during the cement production process, which has certain positive significance for environmental protection.

1. Control the dosage. Generally, the dosage of sulphonated melamine formaldehyde is about 0.5%~2.0% of the cement mass. The specific dosage should be determined by experiment according to the design requirements of concrete, cement type, aggregate grading and other factors to achieve the best water reduction effect and concrete performance.
2. Incorporation method. We can directly add sulfonated melamine formaldehyde resin into the concrete mixing water in the form of powder or water, and then mix it with cement, aggregate and other raw materials. You can also mix the water reducer with part of the mixing water to make a solution, and then add it to the concrete mixing pot for stirring to ensure that the water reducer is evenly dispersed in the concrete.