Concrete repair coating

Patent metadata

Field	Value
Publication number	US-2020123058-A1
Application number	US-201916657543-A
Country	US
Kind code	A1
Filing date	Oct 18, 2019
Priority date	Oct 23, 2018
Publication date	Apr 23, 2020
Grant date	—

Abstract

A concrete and asphalt repair coating formulation includes a cement component and an aggregate component. The cement component includes a calcium sulfoaluminate cement and a Portland cement. The aggregate component includes coarse aggregates between 125-500 microns in diameter and fine aggregates between 5-62.5 microns in diameter.

First claim

What is claimed:

1 . A concrete repair coating formulation, comprising:
a cement component including a calcium sulfoaluminate cement and a Portland cement; and an aggregate component including coarse aggregates between 62.5 microns and 500 microns in diameter and fine aggregates between 62.5 microns to less than 5 microns in diameter.

2 . The concrete repair coating formulation of claim 1 wherein said cement component has a ratio by weight of Portland cement to calcium sulfoaluminate cement ranging from 1/19 to 1/5.66.

3 . The concrete repair coating formulation of claim 2 , wherein the coarse aggregates include screen fractions of (a) minus 500 microns by plus 250 microns of limestone, dolomitic limestone, dolomite or quartz sand constituting between 10-25% by weight of total product, (b) less than 250 microns by 125 microns constituting between 20-35% by weight of the total product and (c) less than 125 microns by plus 62.5 microns constituting between 6% to 10% by weight of total product.

4 . The concrete repair coating formulation of claim 3 , wherein said coarse aggregates are 50% to 60% by weight above 62.5 microns in diameter of the total product.

5 . The concrete repair coating formulation of claim 4 , wherein said fine aggregate of limestone, dolomitic limestone, dolomite and quartz sand fraction of less than 62.5 microns constitutes between 4-8% by weight of the total product.

6 . The concrete repair coating formulation of claim 5 , wherein said fine aggregates further include a quartz flour filler with an average particle size 5 microns that constitutes between 5-15% by weight of total concrete repair coating formulation.

7 . The concrete repair coating formulation of claim 6 , further including a set time retarder.

8 . The concrete repair coating formulation of claim 7 , further including a water reducing agent.

9 . The concrete repair coating formulation of claim 8 , further including a defoaming agent.

10 . The concrete repair coating formulation of claim 9 , wherein said set time retarder is selected from a group of set time retarding agents consisting of citric acid, tartaric acid, glucose and combinations thereof.

11 . The concrete repair coating formulation of claim 10 , wherein said set time retarder is provided at a first dosage range of 0.20-0.40% by weight of the total concrete repair coating formulation.

12 . The concrete repair coating formulation of claim 11 , wherein said water reducing agent is selected from a group of water reducing agents consisting of naphthalene sulfonates, polycarboxylate and melamine-based agents and combination thereof.

13 . The concrete repair coating formulation of claim 12 , wherein said water reducing agent is provided at a second dosage range of 0.75-1.25% by weight of the total concrete repair coating formulation.

14 . The concrete repair coating formulation of claim 13 , wherein said defoaming agent is selected from a group of defoaming agents consisting of petroleum distillates and ethoxylated alcohols on a silica carrier.

15 . The concrete repair coating formulation of claim 14 , wherein said defoaming agent is provided at a dosage range of 0.5%-1.0% of the total concrete coating formulation.

16 . The concrete repair coating formulation of claim 1 , wherein a limestone, dolomitic limestone, dolomite or quartz sand coarse aggregates include screen fractions of (a) minus 500 microns by plus 250 microns constituting between 10-25% by weight of the total product; (b) less than 250 microns by more than 125 microns constituting of between 20-35% by weight of the total product and (c) less than 125 microns by plus 62.5 microns constituting between 6-10% by weight of total product.

17 . The concrete repair coating formulation of claim 16 , wherein said coarse aggregates are 60% by weight above 62.5 microns in diameter of the total product.

18 . The concrete repair coating formulation of claim 17 , wherein said fine aggregates include a limestone, dolomitic limestone, dolomite or quartz sand fraction of less than 62.5 microns constituting between 4-8% by weight of the total product.

19 . The concrete repair coating formulation of claim 18 , wherein said fine aggregates further include a quartz flour filler with an average (d50) particle size of 5 micron that constitutes between 5-15% by weight of total concrete repair coating formulation.

20 . A concrete repair coating formulation, comprising:
a cement component including a calcium sulfoaluminate cement and a Portland cement having a ratio by weight of Portland cement to calcium sulfoaluminate cement ranging from 1/19 to 1/5.66; an aggregate component with gradation spanning from 500 microns to less than 5 microns; a set time retarder; a water reducing agent; and a defoaming agent.

21 . A kit for concrete repair, comprising:
a vessel including a dry concrete repair coating formulation including a cement component having a calcium sulfoaluminate cement and a Portland cement having a ratio by weight of Portland cement to calcium sulfoaluminate cement ranging from 1/19 to 1/5.66 and an aggregate component with gradation spanning from 500 μm to less than 5 μm, a set time retarder; a water reducing agent; a defoaming agent and a premeasured water additive package adapted to prevent a user from overdosing with water.

22 . An asphalt surface, comprising:
weathered asphalt; and a concrete repair coating formulation bound to said weathered asphalt, said concrete repair coating formulation including (a) a cement component including a calcium sulfoaluminate cement and a Portland cement having a ratio by weight of Portland cement to calcium sulfoaluminate cement ranging from 1/19 to 1/5.66, (b) an aggregate component with gradation spanning 500 microns to 5 microns, (c) a set time retarder and (d) a water reducing agent (e) and a defoaming agent.

Assignees

• Univ Kentucky Res Found

Inventors

• Robl Thomas
• Jewell Robert B
• Oberlink Anne
• Duvallet Tristana

Classifications

• E01C11/005 Primary

  Methods or materials for repairing pavings (E01C7/35 takes precedence; for concrete coverings E01C7/147; for bituminous coverings E01C7/187; devices for repair works E01C23/06; repairing bridge floorings E01D22/00) · CPC title

• C04B28/04

  Portland cements · CPC title

• C04B2111/72

  Repairing or restoring existing buildings or building materials · CPC title

• C04B28/065 Primary

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

• C09D1/06

  cement · CPC title