Shandong Michem Chemical Co., Ltd.’s Post

Hydrated cement Based on the information provided, the two distinctive phases in hydrated cement paste are: Solid Phases: The solid phases make up 50-60% of the volume of the hydrated cement paste. They have a structure of disordered thin layers with a very high specific surface area, around 3,000,000 cm^2/g. Pores (at least partially filled with water): The space between the layers of the solid phases is called gel pores, with a size ranging from 0.5 to 2.5 nm. The strength of the hardened cement paste is attributed to the attractive forces between the calcium silicate hydrate (CSH) crystals over their enormous surface area. In summary, the hydrated cement paste consists of a solid phase with a high specific surface area and a porous structure filled with water, and the strength of the material is derived from the attractive forces between the CSH crystals. #highperformance #highquality #decarbonization #sustainability #durablity #cement

📍Given the fact that most PVC cements these days are clear - but primer purple, would it work to mix these 2 & apply together, so that 1 could actually see where they put this cement-glue? Here's my answer on Quora for Structures Insider Share your thoughts here - https://qr.ae/psopBq #quora #structuresinsider

In the 60's it was researched and proposed by the Swedish company Glenjesberg. The method of cold-setting #pellets/ #briquettes using Portland #cement as #binder. Cold consolidation #pellet method with Portland cement as #binder. The amount of binder is 8-12%. 2/3 of Portland cement is lime, the rest is SiO2, Al2O3 and Fe2O3, and self-fusing #pellets can be obtained when the content of SiO2 in the concentrate used does not exceed 4%. Using Portland cement can help briquettes to curing faster,which can help #briquettes to curing when you have no drying equipment and no strict requirement on ash content.

Cementitious materials, such as Portland cement, undergo a direct reaction with water. This chemical reaction is called hydration. During hydration, the cement and water chemically combine to form calcium-silicate-hydrate, commonly abbreviated as C-S-H. This compound is critical because it forms the primary binder that gives concrete its strength and durability. Pozzolanic materials, including substances like fly ash or silica fume, lack inherent cementitious qualities and do not react independently with water. However, these materials can undergo a secondary reaction when exposed to C-S-H. This process, called the pozzolanic reaction, enables pozzolans to gain cementitious properties. Furthermore, by reacting with excess calcium hydroxide produced during hydration, pozzolanic materials contribute additional strength and durability, enhancing the overall performance and longevity of the concrete. Learn more about about the differences and complementary uses of cementitious and pozzolanic materials at https://lnkd.in/ezNWUXzw. #concreteknowledge #triangletechtips #readymixedconcrete

#cement #clinker The changing process of cement clinker burning 一. Drying and dehydration 1. Drying of kiln materials When the temperature rises to 100-150℃, all free water in the raw material is removed, especially in wet production, the water content in the slurry is 32-40%, this process is more important. In dry production, the moisture content of raw materials generally does not exceed 1.0%. 2. Dehydration When the temperature of the kiln materials rises to 450℃, kaolin (Al2O3·2SiO2·2H2O), the main component of clay, undergoes a dehydration reaction to remove the chemically bound water. This process is an endothermic process. Al2O3·2SiO2·2H2O== Al2O3(amorphous)+2SiO2(amorphous)+2H2O After dehydration, it becomes amorphous aluminum oxide and silicon dioxide, and these amorphous substances have high activity. Welcome to inquire at any time: 8613361460005(WhatsApp/Mob) To learn more about the silo and the related equipment information, please visit https://lnkd.in/gEufQxVG company is mainly manufacturing: steel silo, cement silo, fly ash silo, mineral powder silo, the clinker silo, elevator, dust collector, air chute, bulk machines and other industrial equipment.

Sodium lignosulphonate application: 1. Concrete admixture: Can be used as a water-reducing agent and applicable for projects such as culvert, dike, reservoirs, airports, expressways, etc. 2. Adhesive for fertilizer granulation and feed granulation 3. Used for electroplating and electrolysis, and can ensure that the coatings are uniform and have no tree-like patterns. 4. A dispersant, an adhesive and reinforcing agent for refractory materials and ceramic products, and improving finished product rate

Discover the power of our AIR SLIDE tarp, also known as polyester (PES) gully cloth. Designed to offer exceptional air passage, this canvas is indispensable in the cement industry, especially for pneumatic conveying chutes. Benefits: Enhanced Durability: Made with high quality material for longer service life. Abrasion Resistance: Withstands rigorous conditions and maintains performance. Customized Projects: Adapted to the specific needs of each client. Superior Performance: Ensures efficient and reliable operation. Own Manufacturing: Quality assurance and process control. Applications: Ideal for pneumatic conveying chutes in the cement industry. Excellent performance in storage silo trailers and cement tank wagons. Used in the transport of alumina, bauxite, calcium carbonate, fine coal, among others. #cement_industry

#Optimum_Sulfate The Sulfate content and sources in cement have great impact on properties of paste and mortar. These parameters influence the cement hydration, Setting time, Workability, Rheology, Mechanical strength and Durability of cement mortar and concrete. To achieve the highest compressive strength, you need to find the optimum SO3 (or gypsum) content in your cement products. Many factors affect the optimal percentage of sulfate, including: * Percentage of main clinker phases (C3S, C3A, C2S, C4AF) and their polymorphisms * Content of SO3 and minor elements of clinker, especially Na2O and K2O * Fineness and size distribution of cement particles * Type and content of supplementary cementitious materials * Type of cement mill and operational parameters, especially temperature * Admixtures and grinding aids 👌 ASTM C 563 standard addresses the issue of optimum SO3 content in cement using compressive strength. #Optimum_SO3 #cement_hydration, #Setting_time, #Rheology, #Mechanical_strength #Durability_of_mortar_and_concrete.

The de-shuttering time for formwork as per Amendment No. 5 to IS 456:2000 varies depending on whether Ordinary Portland Cement (OPC) or a mix using mineral admixtures (such as fly ash, GGBS, silica fume, etc.) is used. Below are the updated guidelines: Additional Guidelines: Temperature Dependency: At lower temperatures (<15°C), the de-shuttering time may need to be increased further due to slower hydration. Strength-Based Removal: The formwork should not be removed until 75% of the characteristic strength is achieved at the relevant age. Proper Curing: After de-shuttering, curing must be continued to ensure proper strength development.