Dry mortar mixture with grains of expanded glass

Abstract

Dry mortar mixture characterized by a glass mixture of expanded glass beads with a grain size d/D 0/8, mixed in a ratio of between 1:1 and 1:3, with a binding mixture of hydraulic binders and stone granules in the weight ratio of 1:2 to 1:4. The glass has a discontinuous grain distribution. For the glass mixture the fractions 0.5/1.0 and 2.0/4.0 are present while a fraction intermediate other fractions are absent. Preferably the fractions 0.25/0.5 and 1.0/2.0 are absent. For the glass mixture preferably all grain sizes between 1.0 and 2.0 mm are absent. The grain size distribution is around an average, so that an open structure is obtained.

Claims

1. A dry mortar mixture comprising: a glass granulate comprising a glass mixture of expanded glass beads, said glass granulate having a grain size d/D 0/8, such that said glass granulate has grains of at least 0 and at most 8.0 millimeter diameter; and stone granules comprising a binding mixture of hydraulic binders and sand, wherein: said glass granulate is mixed in a ratio of between 1:1 and 1:3 with said stone granules, said stone granules being in a weight ratio of between 1:2 and 1:4; and wherein for the glass mixture: the intermediate d/D fraction 1.0/2.0 is absent, such that for the glass mixture all grain sizes between 1.0 and 2.0 mm are absent and grain sizes smaller than 1.0 mm and larger than 2.0 mm are present, the grain size distribution is around an average, so that an open structure is obtained, and a fraction relates to an undivided group of grain sizes.

2. The mixture according to claim 1, wherein said binding mixture further comprises a minimum of 0.1% by weight of one or more of: elastomers in powder form; in water re-dispersible resin powder; alkali metal salt; anti-foaming agent; aniogeen and non-aniogeen surfactant; hydroxyl carboxylic acid; and one or more of preservatives, thickeners, liquefaction agents.

3. The mixture according to claim 1, wherein: the average grain size distribution of the glass granulate is at least a factor of 1.25 larger in comparison with the average grain size distribution of the sand; and in the glass mixture a grain size associated with a median of the summed mass percentage of the grains is between 1.0 and 3.0 mm; and wherein the mixture is mixed in a ratio of 1:2, being 6 kg of glass mixture and 12 kg of binder mixture.

4. The mixture according to claim 1, wherein: the hydraulic binder comprises a content by weight of Portland cement as a mineral binder; the binder is present in an excess; and the sand has a grain size of not more than 3 mm.

5. A Method comprising: mixing the mixture according to claim 1 with water at a construction site thereby creating a plastic mortar; spreading the plastic mortar in a thickness of approximately between 5 and 25 mm on a substrate with a blade; applying the mortar onto a concrete floor in a bathroom of a permanent home on shore and onto a cured mortar layer, with the aid of an adhesive; and applying a floor covering, thereby providing a top layer.

6. A dry mortar mixture comprising: a glass granulate comprising a glass mixture of expanded glass beads, said glass granulate having a grain size with a discontinuous grain distribution d/D 0/8, such that said glass granulate has grains of at least 0 and at most 8.0 millimeter diameter; and stone granules comprising a dust poor binding mixture of hydraulic binders and sand, wherein: said glass granulate is mixed in a ratio of between 1:1 and 1:3 with said stone granules, said stone granules being in a weight ratio of between 1:2 and 1:4; and wherein for the glass mixture: the d/D fractions 0.5/1.0 are present and one or more intermediate grain sizes for the d/D 0/8 are absent such that grain sizes smaller and larger than the absent intermediate grain sizes are present, the grain size distribution is around an average, so that an open structure is obtained, and a fraction relates to an undivided group of grain sizes, for the glass mixture.

7. The mixture according to claim 6, wherein the grain sizes that are between 25% and 50% smaller than D are absent.

8. The mixture according to claim 7, wherein the grain sizes that are between 200% and 400% greater than d=0.5 are absent.

9. The mixture according to claim 6, wherein the d/D fraction 1.0/2.0 is absent, such that for the glass mixture all grain sizes between 1.0 and 2.0 mm are absent and grain sizes smaller than 1.0 mm and larger than 2.0 mm are present.

10. The mixture according to claim 9, wherein for the glass mixture also the d/D fraction 0.25/0.5 is absent.

11. The mixture according to claim 6, wherein for the glass mixture the voids content of the unbound glass mixture is between 25 and 45 vol %.

12. The mixture according to claim 6, wherein for the glass mixture the specific weight of the glass granulate is between about 0.3 and 0.6, relative to the specific gravity of water being 1.0.

13. The mixture according to claim 6, wherein for the glass mixture at least one grain size between 1.0 and 2.0 millimeters is absent.

14. The mixture according to claim 6, wherein for the glass mixture the average grain size distribution of the glass granulate is at least a factor of 1.25 larger in comparison with the average grain size distribution of the sand.

15. The mixture according to claim 6, wherein for the glass mixture the amount of glass granulate of the smallest sieve size is less than 65% of total glass mixture.

16. The mixture according to claim 6, wherein in the glass mixture a grain size associated with a median of the summed mass percentage of the grains is between 1.0 and 3.0 mm.

17. The mixture according to claim 6, wherein the binder is present in an excess.

18. The mixture according to claim 6, wherein for the glass mixture the percentage by mass of the grain sizes that are present is substantially the same.

19. The mixture according to claim 6, wherein for the glass mixture also the d/D fraction 2.0/4.0 is present.

20. The mixture according to claim 6, dry packed in a sac.

Description

EXAMPLE I

(1) The dry binding mixture contains: 200 parts by weight portland cement (hydraulic binder), 400 parts by weight sand from 0.12 to 2 mm, 25 parts by weight elastomers, 15 parts by weight again in water dispersible synthetic material powder, 5 parts by weight of a mixture of 1 mole of lithium carbonate and 1 mole of tartaric acid, 5 parts by weight alkali metal salt (on sodium basis), 10 parts by weight anti-foaming agent and 10 parts by weight surfactant. The dry glass mixture contains: in equal parts only fractions 0.5-1.0 mm and 2.0-4.0 mm. The dry mortar mixture contains 6 kg dry glass mixture to 12 kg of dry binder mixture, at the building site 3.5 liters of water is added thereto.

EXAMPLE II

(2) As Example I, the hydraulic binder comprises portland quick-cement, gypsum hemihydrate, and clay-earth-quick cement in the weight ratio 1:1:1.

EXAMPLE III

(3) The dry binder mixture contains: 200 parts by weight hydraulic binder, 500 parts by weight sand from 0.12 to 2 mm, 35 parts by weight of rubber powder, 10 parts by weight alkali-resistant re-dispersible vinyl acetate-ethene copolymer, 5 parts by weight calcium salt of diisopropyl naftalene sulfonacid as an anti-foaming agent, 5 parts by weight of the sodium salt of a with sulfonic groups modified melamine-formaldehyde condensation product to provide flowability, 5 parts by weight alkylaryl sulphonate. The dry glass mixture contains: in equal parts only the sieve fractions 0.5-1.0 mm and 2.0-4.0 mm. The dry mortar mixture contains 6 kg dry glass mixture to 12 kg of dry binder mixture, at the building site 3.5 liters of water is added thereto.

EXAMPLE IV

(4) The dry binding mixture contains: 1000 parts by weight of portland cement and tras cement in the ratio 30:70, 2000 parts by weight quartz sand from 0.12 to 2 mm, 180 parts by weight of rubber powder, 60 parts by weight redispersible resin powder, 15 parts by weight of the calcium salt of diisobutyl naftalene sulfonacid (anti-foaming), 15 parts by weight anti-foaming agent, 15 parts by weight flow agent, 15 parts by weight alkylarylsulphonate. The dry glass mixture contains: in equal parts only the sieve fractions 0.5-1.0 mm and 2.0-4.0 mm.

(5) The dry mortar mixture contains 6 kg dry glass mixture to 12 kg of dry binder mixture, at the building site 3.5 liters of water is added thereto.

EXAMPLE V

(6) The same as any of examples I-IV, with the exception that the dry glass mixture contains in equal parts the sieve fractions 0.25-0.5 and 0.5-1.0 and 2.0-4.0 mm.

(7) After curing the mortars of the above examples satisfy the following conditions (DIN18156): compressive strength 25 MPa, flexural strength 8 MPa, adhesion-tensile strength 1.5 MPa (dry and 0.8 MPa (wet), shear strength 9 N/mm (dry) and 6 N/mm (wet).

(8) Commercially available fractions expanded glass granulate are for example: 0.1-0.3; 0.25-0.5; 0.5-1.0; 1.0-2.0; 2.0-4.0; 4.0-8.0.

(9) The values indicated in the Examples I-V may differ 10 or 20%.

(10) The attached single FIGURE shows the discontinuous grain size distribution of the glass according to an example according to which the glass mixture consists of the two fractions 0.5/1.0 and 2.0/4.0 (d/D=0.5/4.0 for the total glass mixture), and all other groups are missing, while the two fractions are present in equal mass percentage (50/50). Vertically, the summed mass percentage and horizontally the grain size of the granulate are indicated.