Noise reducing mortar composition

Patent metadata

Field	Value
Publication number	US-12338178-B2
Application number	US-202017603486-A
Country	US
Kind code	B2
Filing date	May 6, 2020
Priority date	May 6, 2019
Publication date	Jun 24, 2025
Grant date	Jun 24, 2025

Abstract

A mortar composition, in particular a leveling mortar composition, including: a) 10-50 wt. % of a hydraulic binder, b) 10-25 wt. % of lightweight aggregates, c) 30-50 wt. % of further aggregates which have a particle density that is higher than the particle density of the lightweight aggregates, d) 0.5-5 wt. % of a polymer.

First claim

The invention claimed is:

1. A mortar composition, comprising:
15-40 wt. %, of calcium aluminate cement and/or sulphoaluminate cement;
3-18 wt. %, Portland cement;
optionally 0.1-10 wt. % latent hydraulic and/or pozzolanic binder materials, especially slag and/or fly ash;
10-25 wt. % of lightweight aggregates, comprising porous inorganic particles and/or hollow inorganic particles;
30-50 wt. % of further aggregates which have a particle density that is higher than the particle density of the lightweight aggregates, and which aggregates comprise quartz, sand and/or calcium carbonate;
0.5-5 wt. % of a polymer which is a water soluble or water redispersible polymer; and
0-10 wt. %, of one or more additives;
whereby all amounts are with respect to the total weight of the mortar composition in dry state, and
wherein the mortar composition comprises Portland cement and aluminate cement and/or sulphoaluminate cement with a weight ratio of Portland cement to aluminate cement and/or sulphoaluminate cement from 0.05-3.

2. The mortar composition according to claim 1 , wherein a particle density of the lightweight aggregates is from 100-2,000 kg/m 3 .

3. The mortar composition according to claim 1 , wherein the lightweight aggregates include two different types of particles, wherein a first type of particles have a particle size of 0.01-1,000 μm, and a second type of particles have a particle size of 0.01-4,000 μm.

4. The mortar composition according to claim 3 , wherein a first type of particles are hollow silicate spheres and the second type of particles are expanded clay aggregates.

5. The mortar composition according to claim 4 , wherein a weight ratio of the first type of particles to the second type of particles is from 1:2-10:1.

6. The mortar composition according to claim 1 , wherein the polymer is a water soluble or water redispersible polymer, and/or wherein the polymer has a glass transition temperature of −45-10° C.

7. A kit-of-parts comprising:
(i) a mortar composition according to claim 1 ;
(ii) optionally mineral wool, slag wool and/or glass wool;
(iii) optionally, an adhesive composition, whereby the adhesive composition comprises:
a) 10-50 wt. % of a hydraulic binder,
b) 20-60 wt. % of lightweight aggregates,
c) 10-25 wt. % of a polymer;

and whereby the adhesive composition is chemically different from the mortar composition;
whereby, in addition to the mortar composition, the kit-of-parts comprises either mineral wool, or the adhesive composition, or both.

8. The kit-of-parts according to claim 7 , whereby the mineral wool is present in the form of a flat plate or mat.

9. A structure, a wall or a ceiling, comprising:
a substrate;
a first layer, comprising mineral wool;
a second layer, comprising the mortar composition according to claim 1 in hardened state;
optionally, a third layer, comprising an adhesive in hardened state, the adhesive composition comprising:
a) 10-50 wt. % of a hydraulic binder,
b) 20-60 wt. % of lightweight aggregates,
c) 10-25 wt. % of a polymer;

optionally, a cover element.

10. The structure according to claim 9 , whereby a thickness of the first layer is smaller than a thickness of the second layer and/or whereby a thickness of the third layer is smaller than a thickness of the first layer.

Assignees

• Sika Tech Ag

Inventors

• Perrino Luigi
• Rattighieri Tiziano
• Borghi Alberto
• Granizo Luz

Classifications

• C04B2111/52

  Sound-insulating materials · CPC title

• C04B2111/00646

  Masonry mortars · CPC title

• C04B2103/0065

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

• C04B28/065

  Calcium aluminosulfate cements, e.g. cements hydrating into ettringite · CPC title

• C04B28/04 Primary

  Portland cements · CPC title