Views: 0 Author: Site Editor Publish Time: 2025-11-18 Origin: Site
Shijiazhuang Qingquan Cellulose Co., Ltd. is a Chinese manufacturer of HPMC/PVA/CMC/MHEC/HEC products. Our products are of excellent quality and reasonably priced, and can be used as additives in mortar, plaster, and putty in construction. They are well-received worldwide.
I. Application Scenarios of Sound Insulating Mortar Sound insulating mortar is mainly used for impact sound insulation of building floor slabs.
It is suitable for sound insulation projects on the floors of newly built, renovated, and expanded residential, school, hospital, hotel, and office buildings, where high levels of indoor quietness are required.
In specific building spaces, except for specific areas such as balconies, kitchens, and bathrooms, sound insulating mortar can generally be used on indoor floors.
When the impact sound insulation performance of a building floor slab is insufficient, laying a certain thickness of sound insulating mortar can effectively reduce the impact sound pressure level and improve living and usage comfort.
II.Sound Insulation Mortar Construction
1. Material Mixing: Use mechanical mixing, strictly controlling the water-to-sound insulation mortar ratio according to the product instructions. The usual order of adding materials is to first pour in clean water, then pour in the dry powder of the sound insulation mortar.
The mixing time should be until the sound insulation mortar is evenly mixed, usually no less than 2 minutes, but not exceeding 20 minutes. The mixed sound insulation mortar should be used within the specified time (e.g., within 2 hours).
2. Laying Mortar: Before laying the sound insulation mortar, sometimes it is required to apply a layer of cement slurry bonding layer (water-cement ratio of approximately 0.4-0.5) to the base layer after applying the interface agent or before laying. Note that the coating area should not be too large, and the sound insulation mortar should be laid immediately after application.
Evenly spread the mixed sound insulation mortar on the base layer. Then use a wooden screed (or aluminum alloy screed) to level it according to the height of the mortar spots or screeds.
3. Smoothing and Polishing:
First Smoothing: Before the sound insulation mortar initially sets, after leveling with a wooden screed, it can be smoothed and compacted with a wooden trowel.
Second Polishing: When the sound insulation mortar has set to the point where a footprint can be left but does not sink in, use a steel trowel for a second polishing, ensuring no areas are missed and the surface is smooth and flat. Polishing should be completed before final setting.
4. Curing: After the sound insulation mortar is completed, care should be taken to protect the finished product and prevent it from being washed away by rain before final setting.
Watering and curing typically begin 24 hours after construction is completed, keeping the area moist, and the curing period is generally no less than 7 days.
During winter construction, the indoor temperature must not fall below 5℃.
III. Summary and Reminders of Key Points
In general, the following points should be noted for successful application of sound insulation mortar:
1. Substrate preparation is crucial: A solid, flat, and clean substrate is a prerequisite for ensuring the sound insulation mortar does not become hollow or cracked.
2. Material proportioning and mixing must be standardized: Strictly follow the product instructions to control the water-cement ratio and mixing time to ensure material performance.
3. Thickness control must be precise: Control the laying thickness using mortar spots and screeds to ensure the sound insulation effect required by the design is achieved.
4. Proper curing is essential: Sufficient water curing is a crucial step in ensuring the strength development of the sound insulation mortar and preventing cracking.
