HPMC thermal insulation mortar mortar

HPMC thermal insulation mortar refers to a modified building material in which hydroxypropyl methylcellulose (HPMC) is added as an additive to the thermal insulation mortar. HPMC is a non-ionic cellulose ether with good water retention, thickening, construction performance and bonding properties. It has been widely used in building mortar, putty powder, tile adhesive, thermal insulation mortar and other fields.

1. The role of HPMC in thermal insulation mortar

The main purpose of adding HPMC to thermal insulation mortar is to improve its workability, water retention, bonding and anti-sagging properties, ensure its convenient construction, and have good mechanical properties and durability after hardening. The specific functions are as follows:

1.1. Strong water retention

HPMC can significantly improve the water retention of mortar, avoid rapid water loss during construction, ensure sufficient hydration of cement, and thus improve the bonding strength and overall strength of mortar.

1.2. Improve construction performance

Due to the good lubricity and thickening effect of HPMC, the mortar is more delicate, smooth, easy to apply and construct, reducing the phenomenon of splashing and falling ash, and improving construction efficiency.

1.3. Enhanced adhesion

HPMC can enhance the adhesion between the mortar and the base layer, avoid shedding and hollowing, and improve the stability of the overall insulation layer.

1.4. Prevent sagging

During vertical wall construction, HPMC can improve the anti-sagging performance of the mortar, so that it remains stable during thick coating construction and is not easy to slide.

2. Performance characteristics of HPMC insulation mortar

Lightweight and high strength: Inorganic lightweight aggregates such as expanded perlite and foam glass are usually added to the mortar. When used with HPMC, a lightweight and high-strength insulation layer can be produced.

Low thermal conductivity: Its thermal conductivity is generally between 0.045 and 0.065 W/m·K, which effectively blocks heat conduction and improves the energy efficiency of buildings.

Good weather resistance: Under the action of HPMC, the durability and crack resistance of the thermal insulation mortar are improved, and it can adapt to various climate changes.

Environmental protection and non-toxicity: HPMC is a green and environmentally friendly material, which is compatible with inorganic materials such as cement and sand, and does not release harmful substances.

3. Application field

HPMC thermal insulation mortar is widely used in the fields of exterior wall insulation system, interior wall insulation, roof insulation, etc. of various buildings. It is especially suitable for energy-saving renovation projects, buildings in cold areas, public buildings, etc., which has a significant effect on building energy saving and comfort.

4. Construction precautions

Reasonable ratio: HPMC thermal insulation mortar should be accurately prepared according to design requirements and construction conditions, and the amount of HPMC should be controlled generally between 0.2% and 0.5% (by dry powder mass).

Stir evenly: When stirring, the dry materials should be mixed evenly first, then water should be added and stirred to a uniform consistency, and then stirred again after standing for a few minutes.

Construction environment control: Avoid construction in high temperature or windy environment to prevent the mortar moisture from evaporating too quickly and affecting the effect.

Base treatment: The base should be clean, free of oil and loose dust, and moistened when necessary to ensure good bonding.

Construction thickness control: The thickness of each plastering should not be too thick, generally controlled within 1.5cm, and thick layer construction should be carried out in batches to prevent cracking and hollowing.

HPMC thermal insulation mortar, as an energy-saving building material with excellent performance, integrates thermal insulation, heat insulation, convenient construction, economy and environmental protection, and is widely used in modern green buildings. The addition of HPMC not only improves the comprehensive performance of the mortar, but also effectively guarantees the construction quality and engineering durability. It is an important technical means to promote building energy conservation and high-quality construction. In the future, with the rapid development of green buildings, HPMC thermal insulation mortar will play a more important role in the building energy-saving system.