Because the description of the problem isn't detailed enough for me to envision, I would recommend looking at a few concrete product websites for suggestions about procedure and products.
One is www.sakrete.com, which has project videos in addition to technical information. Another is www.quikrete.com, and a third is the website of the Portland Cement Association at www.cement.org.
In every maintenance or repair job, decide first whether doing it yourself is worth your time. If you don't have the resources or the expertise, you may end up rushing the job and making things worse.
I was standing with two joggers on South Michigan Avenue in Chicago several summers ago when I was covering the National Hardware Show.
One complained to the other about a porch in great need of repair.
"I could do it myself," the man said, "but I worked a weekend of overtime to pay a carpenter to do it instead."
Vacation? What's vacation? Steve Ash, service director for PartSelect.com, the do-it-yourself appliance repair website, offers tips for averting disaster while you are away from home.
Turn off your ice maker before disconnecting the device from the water supply. If you turn off the water supply but not the ice maker, the ice maker will be calling for water several times a day and will eventually damage the fill valve. For most models, directions are on the outside of the maker or ice container.
Dishwasher: After your last load, leave the door ajar to let the appliance "breathe" while you're away.
Washer: Leave the lid/door open to let the basin dry completely. Chances are you'll have plenty of laundry to do upon your return, so you'll want the washer to be empty and fresh. And don't forget to disconnect the unit's water supply.
Refrigerator: Consume or discard any perishables and wipe away puddles of spilled milk, no matter how small, with a damp cloth to prevent odors.
Garbage disposal: Run a cycle to clean the unit and prevent odors from any buildup hiding beneath the drain. Add a cup of vinegar to your rinse for an extra-deep clean.
When screws and nails won't work: Al Heavens shows how to use a biscuit joiner at www.philly.com/yourplace.
Questions? E-mail Alan J. Heavens at firstname.lastname@example.org or write him at The Inquirer, Box 8263, Philadelphia 19101. Volume prohibits individual replies. He is the author of "Remodeling on the Money" (Kaplan Publishing).