Claims
- 1. An improved paving slurry seal mixture of a cationic aqueous bituminous emulsion and mineral aggregate capable of being worked comprising mineral aggregate of a grade passing through a No. 4 sieve and at least 80% retained on 200 mesh, mixing water, and an oil-in-water emulsion of a pH of 1-7 and comprised of from about 30% to about 80% bitumen, by weight of the emulsion, from about 0.1% to about 10%, based on the weight of the emulsion; of a cation active emulsifier selected from the group consisting of reaction products of a polyamine with polycarboxylic acids and anhydrides of the general formulae ##STR11## wherein x and y are integers from 3 to 9, x and y together equal 10-14, at least one Z is a carboxylic acid group and any remaining Z is hydrogen, and water to make up 100% by weight of the emulsion, wherein the improvement comprises adding to the aggregate mixing water, prior to addition of the bituminous emulsion, from 0.01 to 0.5%, based on the weight of the aggregate, of a set retarder comprising a blend of (1) the product of the reaction of a C.sub.8 -C.sub.15 alkylphenol with from 15 to 100 moles ethylene oxide and (2) the product of the reaction of a polyamine with a member of the group consisting of kraft lignin and maleinized kraft lignin.
- 2. The improved paving slurry seal mixture of claim 1 wherein the set retarder is further blended with fatty and rosin acids selected from the group consisting of the following mono-and polycarboxylic acids and anhydrides: ##STR12## wherein x and y are integers from 3 to 9, x and y together equal 10-14, at least one Z is a carboxylic acid group and any remaining Z is hydrogen.
- 3. The improved paving slurry seal mixture of claim 1 wherein the mixture is cured at a temperature of from about 90.degree. F. to about 140.degree. F.
- 4. The improved process of claim 1 wherein the set retarder polyamine component is defined by the general formula selected from the group consisting of
- H.sub.2 NHC.sub.2 CH.sub.2 NHR,
- where
- R=H--, CH.sub.3 --, C.sub.2 H.sub.5 --, C.sub.3 H.sub.7 --, --CH.sub.2 CH.sub.2 OH, --(CH.sub.2 CH.sub.2 NH).sub.x H
- x=1, 2, 3, 4, . . . 10, R.sub.1 R.sub.2 N(CH.sub.2).sub.y NHR.sub.1, where
- R.sub.1 =H--, CH.sub.3 --, C.sub.2 H.sub.5 --, C.sub.3 H.sub.7 --, NH.sub.2 CH.sub.2 CH.sub.2 --
- R.sub.2 =H--, CH.sub.3 --, C.sub.2 H.sub.5 --
- y=2, 3, 4, 5, 6, and
- R.sub.1 H.sub.2 N(CH.sub.2).sub.x Y(CH.sub.2).sub.z NH.sub.2
- where
- Y=O, S, SO, SO.sub.2 --, C.sub.6 H.sub.4 --
- x=2-10
- z=2-10.
- 5. The improved paving slurry seal mixture of claim 1 wherein the set retarder polyamine is selected from the group consisting of 1,3-diaminopropane, 1,4-diaminobutane, 1,5-diaminopentane, 1,6-diaminohexane, piperazine, N-aminoethyl piperazine, N-hydroxyethyl piperazine, N-aminopropyl-propane diamine-1,3, N-methyl-N-aminopropylpropane diamine-1,3, and N-aminohexylhexane diamine-1,6.
- 6. The improved paving slurry seal mixture of claim 1 wherein the set retarder polyamine is modified by reaction with an aldehyde followed by reaction with a member of the group consisting of acrylic acid, methacrylic acid, fumaric acid, and maleic anhydride.
- 7. The improved paving slurry seal mixture of claim 1 wherein the lignin polyamine condensate is modified by reaction with a member of the group consisting of ethylene oxide, propylene oxide, and butylene oxide.
- 8. The improved paving slurry seal mixture of claim 2 wherein the kraft lignin is maleinized after blending with the fatty and rosin acids.
- 9. The improved paving slurry seal mixture of claim 1 wherein the bitumen content of the emulsion is from about 60% to about 70%, by weight, and the emulsifier content of the emulsion is from about 0.5% to about 2%, by weight, and the emulsion pH is 2.5 and the set retarder is added in an amount from about 0.05% to about 0.15%, by weight of the aggregate.
- 10. The improved paving slurry seal mixture of claim 1 wherein the set retarder polyamine is modified by reaction with a member of the group consisting of acrylic acid, methacrylic acid, fumaric acid, and maleic anhydride.
Parent Case Info
This application is a continuation-in-part of application Ser. No. 07/961,347 filed Oct. 15, 1992 now abandoned.
US Referenced Citations (11)
Continuation in Parts (1)
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Number |
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961347 |
Oct 1992 |
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