Methods and compositions for inhibiting freeze-thaw damage in concrete and cement paste

Patent metadata

Field	Value
Publication number	US-12570577-B2
Application number	US-202017619992-A
Country	US
Kind code	B2
Filing date	Jun 17, 2020
Priority date	Jun 17, 2019
Publication date	Mar 10, 2026
Grant date	Mar 10, 2026

Abstract

Cement paste compositions, concrete compositions, and methods of forming the cement paste compositions and concrete compositions are disclosed. Exemplary cement paste compositions and concrete compositions include a water-soluble additive that is dissolved and is configured to perform one or more of ice recrystallization inhibition and dynamic ice shaping when the cement composition is exposed to temperatures less than or equal to a freezing temperature of water.

First claim

We claim:

1 . A cement paste composition comprising:
cement; water; and a water-soluble additive comprising a first polymer or a copolymer comprising a first polymer segment and a second polymer or a second polymer segment, wherein the first polymer and the second polymer or the first polymer segment and the second polymer segment are different, the first polymer or the first polymer segment comprising polyvinyl alcohol (PVA), wherein a weight ratio of the water-soluble additive to the cement is between 0.03% and 0.07%, and wherein the water-soluble additive in the cement composition is dissolved and is configured to perform one or more of ice recrystallization inhibition and dynamic ice shaping when the cement composition is exposed to temperatures less than or equal to a freezing temperature of water.

2 . The cement paste composition of claim 1 , wherein the water-soluble additive comprises a copolymer of PVA and PEG.

3 . The cement paste composition of claim 1 , wherein the first polymer or the first copolymer segment is configured to perform the one or more of ice recrystallization inhibition and dynamic ice shaping.

4 . The cement paste composition of claim 1 , wherein a molecular weight of the water-soluble additive is between about 500 and about 500,000, about 10,000 and about 150,000, or about 40,000 and about 50,000 Daltons.

5 . The cement paste composition of claim 1 , wherein the water-soluble additive can be represented by the general formula (C 2 H 3 O) n (C 2 H 4 O) m , where nom ranges from about 6:19 to about 561:1685, or about 229:687 to about 286:858.

6 . The cement paste composition of claim 1 , wherein the water-soluble additive inhibits freeze-thaw damage in a cement paste comprising the cement composition.

7 . The cement paste composition of claim 1 , wherein the water-soluble additive inhibits ice crystal growth in a cement paste comprising the cement composition.

8 . The cement paste composition of claim 1 , wherein the water-soluble additive further comprises one or more of poly(2-hydroxyethyl methacrylate) (pHEMA), poly(2-hydroxypropyl methacrylamide) (pHPMA), polyethylene glycol (PEG), and zirconium acetate.

9 . The cement paste composition of claim 1 , wherein the copolymer comprises PVA and PEG represented by the Formula 1, wherein n ranges from greater than 0 to 561, m ranges from 19 to 1695, and p ranges from 19 to 1695,

10 . The cement paste composition of claim 1 , wherein a molecular weight of the water-soluble additive is between about 40,000 and about 50,000 Daltons.

11 . The cement paste composition of claim 1 , wherein the water-soluble additive comprises one or more of safranin-O, folic acid, gelatin, and alkylated galactose derivatives.

12 . The cement paste composition of claim 1 , the second polymer or the second polymer segment comprising polyethylene glycol (PEG).

13 . The cement paste composition of claim 12 , wherein the second polymer or the second copolymer segment is more stable in the cement paste at a pH greater than or equal to 7, or about 7 to about 14 or about 12 to about 13.5.

14 . A cement paste composition comprising:
cement; water; and a water-soluble additive comprising a first polymer or a copolymer comprising a first polymer segment and a second polymer or a second polymer segment, the first polymer or the first polymer segment comprising polyvinyl alcohol (PVA), the second polymer or the second polymer segment comprising polyethylene glycol (PEG), wherein a weight ratio of the water-soluble additive to the cement is between 0.03% and 0.07%, and wherein the water-soluble additive in the cement composition is dissolved and is configured to perform one or more of ice recrystallization inhibition and dynamic ice shaping when the cement composition is exposed to temperatures less than or equal to a freezing temperature of water.

15 . A cement paste composition comprising:
cement; water; and a water-soluble additive comprising a first polymer or a copolymer comprising a first polymer segment, the first polymer or the first polymer segment comprising polyvinyl alcohol (PVA), wherein the water-soluble additive comprises a copolymer of PVA and PEG, wherein a weight ratio of the water-soluble additive to the cement is between 0.03% and 0.07%, and wherein the water-soluble additive in the cement composition is dissolved and is configured to perform one or more of ice recrystallization inhibition and dynamic ice shaping when the cement composition is exposed to temperatures less than or equal to a freezing temperature of water.

16 . A cement paste composition comprising:
cement; water; and a water-soluble additive comprising a first polymer or a copolymer comprising a first polymer segment, the first polymer or the first polymer segment comprising polyvinyl alcohol (PVA), wherein the water-soluble additive can be represented by the general formula (C 2 H 3 O) n (C 2 H 4 O) m , where nom ranges from about 6:19 to about 561:1685, or about 229:687 to about 286:858, wherein a weight ratio of the water-soluble additive to the cement is between 0.03% and 0.07%, and wherein the water-soluble additive in the cement composition is dissolved and is configured to perform one or more of ice recrystallization inhibition and dynamic ice shaping when the cement composition is exposed to temperatures less than or equal to a freezing temperature of water.

17 . A cement paste composition comprising:
cement; water; and a water-soluble additive comprising a first polymer or a copolymer comprising a first polymer segment, the first polymer or the first polymer segment comprising polyvinyl alcohol (PVA), wherein the water-soluble additive further comprises one or more of poly(2-hydroxyethyl methacrylate) (pHEMA), poly(2-hydroxypropyl methacrylamide) (pHPMA), polyethylene glycol (PEG), and zirconium acetate, wherein a weight ratio of the water-soluble additive to the cement is between 0.03% and 0.07%, and wherein the water-soluble additive in the cement composition is dissolved and is configured to perform one or more of ice recrystallization inhibition and dynamic ice shaping when the cement composition is exposed to temperatures less than or equal to a freezing temperature of water.

18 . A cement paste composition comprising:
cement; water; and a water-soluble additive comprising a first polymer or a copolymer comprising a first polymer segment, the first polymer or the first polymer segment comprising polyvinyl alcohol (PVA), wherein the water-soluble additive comprises one or more of safranin-O, folic acid, gelatin, and alkylated galactose derivatives, wherein a weight ratio of the water-soluble additive to the cement is between 0.03% and 0.07%, and wherein the water-soluble additive in the cement composition is dissolved and is configured to perform one or more of ice recrystallization inhibition and dynamic ice shaping when the cement composition is exposed to temperatures less than or equal to a freezing temperature of water.

Assignees

• Univ Colorado Regents

Inventors

• Srubar Iii Wilfred V
• Frazier Shane
• Delesky Elizabeth A
• Wallat-Pullara Jaqueline D

Classifications

• C04B2111/29

  Frost-thaw resistance · CPC title

• C04B2103/601

  Agents for increasing frost resistance · CPC title

• C04B2103/0053

  Water-soluble polymers · CPC title

• C04B40/0046

  characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures · CPC title

• C04B28/02

  containing hydraulic cements other than calcium sulfates · CPC title