1. Calcium oxide concrete expanding agent Calcium oxide concrete expanding agent uses CaO as the expansion source and is made from ordinary lime and stearic acid ground together in a particular proportion. Stearic acid is added to lime (calcium oxide) during grinding. On the one hand, it acts as a grinding aid. On the other […]
CSA expanding agent CSA expanding agent is made of bauxite, limestone, and gypsum as the primary raw materials and is calcined at around 1300°C and then ground. The dosage of CSA expanding agent is generally 8% to 10% of cement; the expansion rate of cement mortar is 0.5%; the expanding rate of pure slurry is […]
A concrete expanding agent is an admixture mixed with cement and water that undergoes a hydration reaction to form ettringite or calcium hydroxide, causing the concrete to expand to a specific volume. Expanding agents into ordinary concrete can prepare shrinkage-compensating concrete and self-stressing concrete, so expansion agents are widely used. The essence of concrete water […]
Hydrophobic agents are a class of admixtures that prevent moisture from entering the mortar while also keeping the mortar open to allow water vapor to diffuse. Water repellent includes three product series: fatty acid metal salts, silanes, and special hydrophobe re-dispersible polymer powders. The unit cost of the fatty acid metal salt product series is […]
Accelerating agent refers to a setting regulating agent that can speed up the setting and hardening of concrete and mortar. According to the chemical composition of their compounds, accelerated agents can be divided into two categories: inorganic and organic. The leading accelerating agent in China is primarily inorganic salts, and the main component is sodium […]
A water-reducing agent is an admixture that can reduce the necessary unit water consumption in concrete, meet the specified consistency requirements, and improve the workability of concrete. The main functions of water-reducing agents are as follows: increasing hydration efficiency, reducing unit water consumption, increasing strength, and saving cement consumption; improving the workability of unsolidified concrete […]
There are many types of concrete admixtures, which can be divided into the following categories according to their chemical composition: inorganic admixtures, organic admixtures, and composite admixtures. Inorganic admixtures are mainly electrolyte salts; organic admixtures are mostly surface-active substances and some high molecular polymers, organic compounds, and double salts. Surfactant admixtures can be divided into […]
Starch ether is a polyacrylamide compound extracted from natural plants. It has the same chemical structure and similar properties as cellulose ether. Starch ether is mainly used in construction mortars. They can affect the consistency of mortars based on gypsum, cement, and lime and change mortars’ workability and sagging resistance. Starch ether is usually combined with non-modified and modified cellulose […]
Polyvinyl alcohol powder is a type of water-soluble film-forming adhesive substance. Its products are now widely used in some dry-mixed mortar products. It provides a relatively cheap adhesive material for powdery and paste putties. Adding Polyvinyl alcohol powder to dry-mixed mortar products like redispersible polymer powder increases its bonding strength, but its comprehensive performance is far from comparable […]
In dry-mixed mortar products, two cementitious material systems, cement and redispersible polymer powder are an ideal match. Combining the two in dry-mixed mortar products achieves significant synergistic effects. Any cementing material used alone can have unattainable properties that allow polymer-modified mortar to be used on various special occasions and have obvious advantages in quality control, construction operations, storage, and […]
