HPMC (Hydroxypropyl Methylcellulose) is a water-soluble polymer compound chemically modified from natural cellulose. It is widely used in many fields such as construction, coatings, medicine, and food. In the construction industry, HPMC, as an important mortar additive, can significantly improve the performance of mortar and enhance its workability, water retention, operability, adhesion, etc.
1. Basic performance and functions of HPMC
HPMC has the following main properties:
Thickening: AnxinCel®HPMC can significantly increase the viscosity of mortar, making the mortar more uniform and stable, and easy to apply during construction.
Water retention: HPMC can reduce the evaporation of water in the mortar, delay the hardening speed of the mortar, and ensure that the mortar will not dry prematurely during the construction process, thereby avoiding the occurrence of cracks.
Rheology: By adjusting the type and dosage of HPMC, the fluidity of the mortar can be improved, making it smoother and easier to construct during application.
Adhesion: HPMC has a certain degree of adhesion and can enhance the bonding force between the mortar and the base material, which is especially important in applications such as dry mortar and exterior wall decorative mortar.
2. Application of HPMC in different mortars
2.1 Application in plastering mortar
Plastering mortar is a type of mortar commonly used in construction. It is usually used for painting and decorating walls, ceilings, etc. The main functions of HPMC in plastering mortar are:
Improve workability: HPMC can improve the fluidity of plastering mortar, making it more uniform and smooth during construction operations, making it easier for construction workers to operate and reducing labor intensity for workers.
Enhanced water retention: Due to the water retention of HPMC, the plastering mortar can maintain sufficient moisture to prevent the mortar from drying out too quickly, causing problems such as cracks and shedding during the construction process.
Improve adhesion: HPMC can improve the adhesion between the mortar and the wall substrate, preventing the mortar from falling off or cracking. Especially in exterior wall plastering projects, it can effectively prevent structural damage caused by external factors such as temperature changes.
2.2 Application in exterior wall insulation mortar
Exterior wall insulation mortar is a kind of composite mortar, which is usually used in the construction of insulation layer of building exterior walls. The application of HPMC in exterior wall insulation mortar is mainly reflected in the following aspects:
Enhanced adhesion: Exterior wall insulation mortar needs to be closely combined with insulation boards (such as EPS, XPS boards, rock wool boards, etc.). HPMC can enhance the adhesion between the mortar and these materials to ensure the firmness and stability of the insulation layer. sex.
Improve workability: Since thermal insulation mortar usually exists in the form of dry powder, HPMC can improve its fluidity with the base material after adding water, ensuring that the mortar can be evenly applied during construction and is not prone to falling off or cracking.
Improve crack resistance: In exterior wall insulation projects, large temperature changes may cause cracks. HPMC can improve the flexibility of mortar, thereby effectively reducing the occurrence of cracks.
2.3 Application in waterproof mortar
Waterproof mortar is mainly used for waterproofing and moisture-proof projects, especially in areas prone to water intrusion such as basements and bathrooms. The application performance of HPMC in waterproof mortar is as follows:
Enhanced water retention: HPMC can effectively improve the water retention of mortar, make the waterproof layer more uniform and stable, and prevent water from evaporating too quickly, thereby ensuring the formation and construction effect of the waterproof layer.
Improve adhesion: In the construction of waterproof mortar, the adhesion between the mortar and the base material is very important. HPMC can enhance the adhesion between the mortar and base materials such as concrete and masonry to prevent the waterproof layer from peeling off and falling off. .
Improve fluidity: Waterproof mortar is required to have good fluidity. HPMC increases fluidity and improves workability so that the waterproof mortar can evenly cover the base material to ensure waterproofing effect.
2.4 Application in self-leveling mortar
Self-leveling mortar is used for floor leveling and is often used in floor construction, floor material installation, etc. Applications of AnxinCel®HPMC in self-leveling mortars include:
Improve fluidity and self-leveling: HPMC can significantly improve the fluidity of self-leveling mortar, giving it better self-leveling properties, allowing it to flow naturally and spread evenly, avoiding bubbles or uneven surfaces.
Enhanced water retention: Self-leveling mortar requires a long time to operate during the construction process. The water retention performance of HPMC can effectively delay the initial setting time of the mortar and avoid increased construction difficulty due to premature drying.
Improve crack resistance: Self-leveling mortar may be subject to stress during the curing process. HPMC can increase the flexibility and crack resistance of the mortar and reduce the risk of cracks on the ground.
3. The comprehensive role of HPMC in mortar
As an important additive in mortar, HPMC can improve its comprehensive performance by adjusting the physical and chemical properties of mortar. Among different types of mortars, the application of HPMC can be adjusted according to actual needs to achieve the best construction effect and long-term performance:
In plastering mortar, it mainly improves the workability, water retention and adhesion of the mortar;
In the exterior wall insulation mortar, the bonding force with the insulation material is strengthened to improve the crack resistance and workability;
In waterproof mortar, it enhances water retention and adhesion, and improves construction performance;
In self-leveling mortar, it improves fluidity, water retention and crack resistance to ensure smooth construction.
As a multifunctional polymer additive, AnxinCel®HPMC has broad application prospects in construction mortars. With the continuous development of construction technology, the types and functions of HPMC will continue to be improved, and its role in improving mortar performance, improving construction efficiency, and ensuring project quality will become increasingly important. In the future, the application of HPMC in the construction field will show a more extensive and diversified trend.
Post time: Dec-26-2024