Mortar composition for acoustic damping and fire protection

Patent metadata

Field	Value
Publication number	US-12030815-B2
Application number	US-202017441255-A
Country	US
Kind code	B2
Filing date	May 6, 2020
Priority date	May 6, 2019
Publication date	Jul 9, 2024
Grant date	Jul 9, 2024

Abstract

A mortar composition, in particular for preparing a viscoelastic structure and/or a fire barrier, including: a) 15-50 wt.-% of a hydraulic binder, b) 5-35 wt.-% of lightweight aggregates, c) 5-25 wt. % of further aggregates which have a particle density that is higher than the particle density of the lightweight aggregates, and d) 10-50 wt.-% of a polymer.

First claim

The invention claimed is:

1. A mortar composition, comprising:
a) 15-50 wt.-% of a hydraulic binder;
b) 5-35 wt.-% of lightweight aggregates;
c) 5-25 wt. % of further aggregates which have a particle density that is higher than the particle density of the lightweight aggregates; and
d) 10-50 wt.-% of at least one polymer,
wherein a particle density of the lightweight aggregates is from 100-2,000 kg/m 3 , and the further aggregates have a particle density >2,000 kg/m 3 .

2. The mortar composition according to claim 1 , wherein the hydraulic binder comprises Portland cement as well as aluminate cement and/or sulphoaluminate cement with a weight ratio of Portland cement to aluminate cement and/or sulphoaluminate cement from 1-5.

3. The mortar composition according to claim 1 , wherein the lightweight aggregates comprise inorganic particles and wherein a particle size of the lightweight aggregates is from 0.01-2 mm.

4. The mortar composition according to claim 1 , wherein the further aggregates are selected from sand, quartz, and/or calcium carbonate, whereby a particle size of the further aggregates is from 0.01-2 mm.

5. The mortar composition according to claim 1 wherein a weight ratio of the lightweight aggregates to the further aggregates is from 0.1-5.

6. The mortar composition according to claim 1 , wherein the polymer is a water soluble or water redispersible polymer.

7. The mortar composition according to claim 1 , wherein the polymer comprises two different copolymers, a copolymer of vinyl acetate and ethylene and a copolymer of acrylic acid ester and styrene, wherein a ratio of the two different copolymers is from 0.5-10:1.

8. The mortar composition according to claim 1 , wherein a weight ratio of the polymer to the lightweight aggregates is from 0.5-10.

9. The mortar composition according to claim 1 , comprising:
16-20 wt.-% of Portland cement;
5-10 wt. % aluminate cement and/or sulphoaluminate cement;
5-10 wt. % latent hydraulic and/or pozzolanic binder materials;
10-20 wt. % lightweight aggregates in the form of porous inorganic particles:
10-20 wt. % of further aggregates; and
25-40 wt.-%, of at least one polymer with a glass transition temperature of −20-45° C.,
whereby all amounts are with respect to the total weight of the mortar composition in dry state.

10. A shaped body comprising a mortar composition according to claim 1 after hardening with water.

11. A structure comprising a shaped body according to claim 10 and a support element and/or a cover element being attached to the shaped body.

12. The structure according to claim 11 , comprising:
a metallic support element;
the shaped body;
the cover element;
an insulation layer; and
a deck covering.

13. A method for acoustic damping, comprising applying the mortar composition of claim 1 to a vehicle, a building and/or an offshore installation.

14. A method of forming a fire protection system, comprising:
applying the mortar composition of claim 1 to a firewall and/or a fire barrier.

15. The mortar composition according to claim 1 , wherein a particle density of the lightweight aggregates is from 400-2,000 kg/m 3 .

Assignees

• Sika Tech Ag

Inventors

• Perrino Luigi
• Brutus Carsten
• Leonetta Romualdo
• Granizo Luz
• Jäger Urs

Classifications

• E04F15/18

  Separately-laid insulating layers; Other additional insulating measures; Floating floors (insulating of buildings in general E04B1/62) · CPC title

• C04B2111/52

  Sound-insulating materials · CPC title

• C04B2111/40

  Porous or lightweight materials · CPC title

• C04B2111/28

  Fire resistance, i.e. materials resistant to accidental fires or high temperatures · CPC title

• C04B24/2676

  Polystyrenes · CPC title