Mortar composition

Patent metadata

Field	Value
Publication number	US-11148976-B2
Application number	US-201715625305-A
Country	US
Kind code	B2
Filing date	Jun 16, 2017
Priority date	Jul 26, 2012
Publication date	Oct 19, 2021
Grant date	Oct 19, 2021

Abstract

A mortar composition, in particular for preparing a viscoelastic body or structure, or for acoustic damping of at least one of a ship, an offshore installation and a building, includes:1-20 wt % of a hydraulic binder,30-80 wt % of aggregates,5-75 wt % of a polymer, and0.5-40 wt % of a porous filler.

First claim

The invention claimed is:

1. A method for the acoustic damping in a ship, an offshore installation, a vehicle and/or in a building, said method comprising the steps of:
producing a structure comprising:
a shaped body comprising a mortar composition after hardening with water, the shaped body having a loss factor tan δ according to standard ISO 6721 at 0° C. and 300 Hz of at least 0.05, wherein
the hardened mortar composition of the shaped body is configured for acoustic damping of the ship, the offshore installation, the vehicle and/or the building, and
the mortar composition comprises:
3-10 wt % of a hydraulic binder,
30-80 wt % of aggregates,
25-35 wt % of a polymer, and
2-6 wt % of a porous filler, wherein
 the porous filler comprises volcanic rock, and
 the porous filler has a porosity of at least 25 vol % and a grain size of the porous filler is 4 mm or less; and

a support element and cover element being attached to the shaped body; wherein

the shaped body comprising the hardened mortar composition is formed by mixing the mortar composition with water, applying the mixture on a support structure and covering the mixture with a covering layer, and wherein the mortar composition is applied on a floor, on a wall, and/or on a ceiling.

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

3. The method according to claim 1 , wherein the polymer of the mortar composition is a homopolymer or copolymer based on one or more monomers selected from the group consisting of vinyl alcohol, acrylic acid, methacrylic acid, and methacrylate.

4. The method according to claim 1 , wherein the hydraulic binder of the mortar composition comprises alumina cement.

5. The method according to claim 1 , wherein the aggregates of the mortar composition is at least one selected from the group consisting of sand, quartz, and rubber.

6. The method according to claim 1 , wherein the shaped body is a flat layer.

7. The method according to claim 1 , wherein the loss factor tan δ according to standard ISO 6721 at 0° C. and 300 Hz is at least 0.13.

8. The method according to claim 1 , wherein the shaped body is arranged between the support element and the cover element, where the support element is a metal layer, and the cover element is formed as flat layer.

9. The method according to claim 1 , wherein the porous filler of the mortar composition is at least one selected from the group consisting of pumice and perlite.

10. The method according to claim 1 , wherein the porosity of the porous filler of the mortar composition is at least 50 vol % with respect to the total volume of the porous filler.

11. The method according to claim 10 , wherein the porosity of the porous filler of the mortar composition is at least 75 vol % with respect to the total volume of the porous filler.

12. The method according to claim 1 , wherein the grain size of the porous filler of the mortar composition is 2 mm or less.

13. The method according to claim 1 , wherein the grain size of the porous filler of the mortar composition is 1 mm or less.

14. The method according to claim 1 , wherein the polymer is selected from polyvinyl esters, polyvinyl alcohols, polymethacrylates, butylacrylates, vinylversatate or mixtures thereof.

15. The method according to claim 1 , wherein polymer is selected from polyacrylate, poly(vinyl acetate), poly(vinyl alcohol), ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer or mixtures thereof.

16. The method according to claim 1 , wherein the mortar composition is applied on the support structure at a thickness in a range of from 1-5 mm.

Assignees

• Sika Tech Ag

Inventors

• Grisoni Luca

Classifications

• C04B28/02 Primary

  containing hydraulic cements other than calcium sulfates · CPC title

• C04B2103/0065

  Polymers characterised by their glass transition temperature (Tg) · CPC title

• C04B2111/52

  Sound-insulating materials · CPC title

• C04B2103/0057

  added as redispersable powders · CPC title

• C04B2103/0053

  Water-soluble polymers · CPC title