# US 11,440,841 B1 · Trona accelerated compositions, and methods of utilizing and producing the same

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- Number: US 11,440,841 B1
- Document ID: US11440841B1
- Status: Granted
- Kind: B1
- Application number: 17/082,280
- Filed: 2020-10-28
- Granted: 2022-09-13
- Earliest claimed: 2017-02-28
- Assignees: J&P Invesco LLC
- Applicants: J&P Invesco LLC
- Inventors: Stanley R. Peters; George Clarence Geal, III
- Web page: https://patentgrep.com/patent/US11440841B1

## CPC

- C04B 7/02: Portland cement
- C04B 18/12: from quarries, mining or the like
- C04B 22/002: {Water}
- C04B 22/106: {Bicarbonates}
- C04B 28/04: Portland cements
- C04B 2103/12: Set accelerators
- C04B 2111/0075: {for road construction}
- C04B 2201/52: High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE

## Abstract

Trona-accelerated composition for backfilling trenches are described. The compositions consist of aggregate (e.g., sand), Portland cement, Trona, water and sometimes air. The compositions may have a compressive strength of between 10 psi and 100 psi after 4 hours, a compressive strength of between 75 psi and 500 psi after 28 days, and a penetration resistance of between 4.5 tsf and 200 tsf after 4 hours. Also disclosed are methods of filling a trench with fast-setting flowable fill.

## Claims

### Claim 1

A method of filling a trench comprising:
(a) mixing a composition, the composition including the following:
between 60% and 90% aggregate by weight of the composition, the percent aggregate by weight of the composition does not include Trona;
between 3% and 25% Portland cement by weight of the composition;
between 0.25% and 8% Trona by weight of the composition; and
between 8% and 35% water by weight of the composition;
the composition having a time to set of less than 1 hour, a compressive strength of between 10 psi and 100 psi after 4 hours, a compressive strength of between 75 psi and 600 psi after 28 days, and a penetration resistance of between 4.5 tsf and 200 tsf after 4 hours; and
(b) filling the trench with the composition.

### Claim 2 (depends on 1)

The method of claim 1, wherein the aggregate is between 65% and 85% by weight of the composition.

### Claim 3 (depends on 1)

The method of claim 1, wherein the aggregate is fine aggregate.

### Claim 4 (depends on 1)

The method of claim 1, wherein the aggregate is a combination of coarse aggregate and fine aggregate.

### Claim 5 (depends on 1)

The method of claim 1, wherein the aggregate is a combination of fine aggregate and micro aggregate.

### Claim 6 (depends on 5)

The method of claim 5, wherein the micro aggregate is dust that is collected in the baghouses of asphalt plants, cement plants, or other industrial facilities that generate and collect dust.

### Claim 7 (depends on 1)

The method of claim 1, wherein the aggregate is sand.

### Claim 8 (depends on 1)

The method of claim 1, wherein the aggregate is a combination of coarse aggregate and sand.

### Claim 9 (depends on 1)

The method of claim 1, wherein the Portland cement is between 4% and 20% by weight of the composition.

### Claim 10 (depends on 1)

The method of claim 1, wherein the Trona is between 0.5% and 4% by weight of the composition.

### Claim 11 (depends on 1)

The method of claim 1, wherein the water is between 10% and 30% by weight of the composition.

### Claim 12 (depends on 1)

The method of claim 1, wherein the aggregate is sand between 65% and 85% by weight of the composition;
the Portland cement is between 4% and 20% by weight of the composition;
the Trona between 0.5% and 4% by weight of the composition; and
the water is between 10% and 30% by weight of the composition.

### Claim 13 (depends on 1)

The method of claim 1, wherein the penetration resistance at 4 hours is between 80 tsf and 180 tsf.

### Claim 14 (depends on 1)

The method of claim 1 further comprising micro aggregate between 5% and 80% by weight of the composition.

### Claim 15 (depends on 14)

The method of claim 14, wherein the micro aggregate is between 15% and 30% by weight of the composition.

### Claim 16 (depends on 1)

The method of claim 1 further comprising a water reducer between 9 and 18 fluid ounces per cubic yard of the composition.

### Claim 17 (depends on 1)

The method of claim 1 further comprising a polymer.

### Claim 18 (depends on 17)

The method of claim 17, wherein the polymer is between 0.05% and 0.12% by weight of dry solids in the composition.

### Claim 19 (depends on 18)

The method of claim 18, wherein the polymer is hydroxypropyl methylcellulose.