Sodium lignosulfonate is used as a defoamer in papermaking in the food industry and as an adhesive in articles that come in contact with food. It has antiseptic properties and is used as an ingredient in animal feed. It is also used in construction, ceramics, mineral powder, chemical industry, textile industry, metallurgical industry, petroleum industry, flame retardant materials, rubber vulcanization, organic polymerization. It is a pepsin inhibitor.
sodium lignosulfonate uses in construction
The applications of lignin and its modified products are mainly in the following aspects:
(1) Cement and concrete water reducer: Lignosulfonate is currently the most widely used water reducer. In 1935, successfully developed a water-reducing agent with lignosulfonate as the main component. Since then, mankind has begun the research on lignosulfonate water-reducing agent. The use of lignosulfonate as a water reducing agent for cement and concrete can not only greatly improve its fluidity and plasticity, but also greatly reduce harmful pores and significantly enhance compressive strength.
(2) Dispersant, flocculant and corrosion and scale inhibitor: Lignosulfonate is an anionic surfactant with excellent performance, which can be used as dispersant, flocculant, etc.
(3) Oilfield chemicals: Lignosulfonates have a special molecular structure and are widely used in oilfield chemicals. They are often used as tertiary oil recovery surfactants, drilling fluid treatment agents, and water shutoff agents.
(4) Synthetic resin: Since the 1990s, lignin has often been used as a basic renewable material for synthetic polymer materials, resins and adhesives.
(5) Polymer materials: Lignin and its derivatives can be blended with polyvinyl chloride (PVC), polyethylene (PE), polyvinyl alcohol (PVA) and other olefin polymer materials to improve the stability, strength and Anti-photolysis and other properties. Liu Chunfang and others added lignosulfonate to rubber as a rubber reinforcing agent, which can improve the mechanical properties of rubber. Li Haijiang and others compounded hydrolyzed lignin with natural rubber to form an interpenetrating network structure, and then prepared a lignin-natural rubber compound by co-precipitation.
(6) Agricultural additives: Sodium lignosulfonate can be used not only as a pesticide dispersant, but also as a wetting agent, complexing agent and fertilizer enhancer, and is widely used in all aspects of agriculture.
Our products-
based superplasticizers can be divided into high-concentration products (Na2SO4 content 10%) according to the Na2SO4 content in the product content.
Performance
1. When the strength and slump of the crucible are basically the same, the amount of cement can be reduced by 10-25%.
2. When the water-cement ratio is constant, the initial slump of concrete increases by more than 10cm, and the water reduction rate can reach 15-25%.
3. It has a significant early strength and strengthening effect on cockroaches, and the strength increases by 20-60%.
4. Improve the working capacity of concrete and comprehensively improve the physical and mechanical properties of concrete.
5. It has good adaptability to various cements and is compatible with other types of concrete admixtures.
6. Especially suitable for the following concrete projects: fluid concrete, plasticized concrete, steam concrete, impermeable concrete, waterproof concrete, natural curing precast concrete, steel and prestressed reinforced concrete, high-strength ultra-high-strength concrete.
7. The slump of concrete has a great loss over time, and the slump loss in half an hour is close to 40%.
Microsilica, also known as silica fume, it is a very fine pozzolanic material, composed of amorphous silica produced byelectric arc furnaces as a byproduct of the production of elemental silicon or ferro silicon alloys.Microsilica can be used in a variety of cementitious products such as concrete,grouts,and mortars as well as elastomer, polymer,refractory, ceramic and rubber applications.
Silica fume is widely used in concrete field: High-performance project, such as bridge, airport, hydropowder station, seawall, railway projects.
1)Enhance the mechanical properties of concrete.
High strength and early strength has been used in substructures of high-performance concrete.
2)Improve the durability of concrete:
Significant improvements can be seen in the permeability resistance, abrasion resistance, anti-corrosion against chlorideion and anti-freezing of concrete.
3)Enhance consructability.
Improve shotconrete, increase easly strength, control temperature contractors can take advantage of the properties of silica fume concrete to expedite projects or to achieve properties that migh otherwise be impossible to achieve.
Sodium gluconate can be used as high-efficiency chelating agent in construction,textile printing and dyeing, metal surface treatment and water treatment industries,
steel surface cleaning agent, glass bottle cleaning agent, aluminum oxide coloring
� in electroplating industry, and high-efficiency retarder in the concrete industry.
Industrial sodium gluconate used as concrete admixture has the following advantages:
1. With sodium gluconate, the W/C ratio can be reduced, which can increase the strength of concrete. This is a high-quality concrete.
2. It is difficult to construct large blocks and heavy weight. Due to the addition of sodium gluconate, the improvement of concrete workability and the delay of setting time can avoid the formation of joints on the structure, and as a result, the structural strength can be improved.
3. It is of great significance to keep the W/C ratio constant and improve workability in hot areas. A large amount of sodium gluconate was used when building bridges in the Middle East.
4. Adding sodium gluconate to the concrete mixture can delay the setting time, which is very important for long and difficult perfusion.
5. In the modern concrete industry, ready-mixed concrete is prepared at a central location and then transported by mixer truck. In this case, it is very important to increase workability and initial setting time.
6. Lowering the W/C ratio can make concrete with higher strength and durability. Sodium gluconate can achieve this goal. This is very important for high-strength reinforced concrete.
7. The prefabricated mortar for masonry must be usable for a long time. Adding sodium gluconate can extend the working period.
8. Oil well grouting grout is difficult to operate due to the high temperature, but after adding sodium gluconate, the concrete can work at 170 for several hours.
