Trona accelerated compositions, and methods of utilizing and producing the same
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.
1. A composition using Trona for accelerating set times of the composition comprising:
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 500 psi after 28 days, and a penetration resistance of between 4.5 tsf and 200 tsf after 4 hours.
2. The composition of claim 1 , further comprising 65-85% aggregate by weight of the composition, wherein the aggregate is one or more of the following: fine aggregate, coarse aggregate, micro aggregate, sand, or any combination thereof.
3. The composition of claim 1 , wherein the Portland cement is between 4% and 20% by weight of the composition.
4. The composition of claim 1 , wherein the Trona is between 0.5% and 4% by weight of the composition.
5. The composition of claim 1 , wherein the water is between 10% and 30% by weight of the composition.
6. The composition of claim 2 , 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.
7. The composition of claim 1 , wherein the penetration resistance at 4 hours is between 80 tsf and 180 tsf.
8. The composition of claim 1 further comprising a water reducer between 9 and 18 fluid ounces per cubic yard of the composition.
9. The composition of claim 1 further comprising a polymer.
10. The composition of claim 9 , wherein the polymer is between 0.05% and 0.12% by weight of dry solids in the composition.
11. The composition of claim 10 , wherein the polymer is hydroxypropyl methylcellulose.