Cement-based self-levelling mortar is a dry-mix mortar composed of special cement, aggregates, and multiple additives. When mixed with water, it forms a highly fluid slurry that rapidly self-levels under manual spreading assistance. Unlike water, which can flow over considerable distances, this material maintains a defined flowability (approximately 130 millimetres) and direction (flowing only from high to low points) within a specific timeframe (approximately 3-5 minutes, depending on ambient temperature). Beyond this period, flow ceases and setting commences.
Self-Levelling Mortar
02Material Composition and Typical Proportions
- Binding Materials
Self-leveling cement/mortar primarily consists of high-alumina cement, ordinary Portland cement, and a-hemihydrate gypsum, accounting for 30–40% of the material. - Mineral Fillers and Setting Regulators
Mineral fillers primarily utilize quartz sand and calcium carbonate powder, accounting for 55–68%. These components enhance the material’s hardness and stability. Setting regulators adjust the material’s setting time; common examples include retarders such as tartaric acid and coagulant accelerators such as lithium carbonate. - Rheology modifiers and reinforcing components
Rheology modifiers improve the material’s workability, with components such as superplasticizers or water-reducing agents enhancing stability. Reinforcing components include redispersible polymer powders, which improve the material’s flowability, abrasion resistance, and strength.
03About SIDLEYchem
SidleyChem is a chemical company integrating production, R&D, and sales. The company specializes in the production and development of additives for dry-mix mortar and concrete.
Drymix Mortar Tech+
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ETICS adhesive mortar additives
his article details the key performance requirements for adhesive mortar in ETICS. Explore SidleyChem’s high-performance solutions including Cellulose Ethers (HEMC/HPMC), Redispersible Polymer Powder (RDP), and Hydrophobic Agents to formulate strong, durable adhesive mortar… Continue reading
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Improve mortar workability
Struggling with poor mortar workability? Learn how Redispersible Polymer Powder (RPP) extends open time, enhances adhesion, and prevents sagging to solve common construction challenges… Continue reading