Take them to the landfill yourself, pay to dump them, and let them go. They are not hazardous.

 

Before you do that, get a couple of quart size mason jars and save a jar of each.

Then just put one bag at a time in the trash.

 

Throw it in the trash! Not going to hurt anything.

Post on Craigs List for free, somebody will take it!

 

Put about half of the bag in a zip tie trash bag into each of your garbage cans, might take 2 weeks but it will be gone.

 

Get some plastic bottles and mix the grout and fill the bottles.
When they harden, cut away the bottle and paint the concrete....all different colors.
Give them away as lawn art in your "manicured" neighborhood.

 

Spread out the thinset and grout on a large piece of cardboard (pizza boxes work well) in a thin layer. Let it dry completely. This can take a few days depending on the weather. Once solid, break the cardboard into smaller pieces and place them in your trash bin. Be sure the weight doesn't exceed your trash collection limit.

 

I would just scoop or pour some from the 50lb bag into a heavy duty contractor garbage bag, and toss it in with the rest of your garbage. Every time you take the trash to the curb, dispose of a little more. You could even do it over the course of several weeks if you're worried about weight.

Or as someone else said, Craigslist or OfferUp because someone will take it.

 

How is trash collection done? Down here it's all contracted out to various companies and they use big trucks with robotic arms to load and empty the carts. No issue with picking up a cart containing a bag of grout or thinset. I would lay it down outside and gently wet all around with a garden hose and let it harden up the outer shell before adding the bags into the trash though.

Check your city's sanitary guide though. Do they accept this in the household trash? We have yard waste, mixed recycle and household garbage in separate carts. One is not supposed to put construction debris into household trash, like you can't throw into trash a torn down fence section even if cut up into pieces but I do occasionally dump in end cuts of 2Xs.

 

Dig a hole and bury it.

 

Oooh, a HOA would need burial certificates and refurbishing plans for the disturbed area as well as environmental impact studies.

 

Drive around a bit box home improvement store and look for a contractors pickup truck that has a load of "stuff" in it.
Either ask the guy in the truck if he wants it....or wait until he goes inside and set it in the back of the truck.
You can put a nice note on it if you like.

 

Put them on Craigslist as "free" "at the curb". Someone will use them for a project.

 

Just put them in the back of the garage somewhere and worry about them later.

 

Cut a small hole in each front pocket of you pants. Fill with grout. Walk around neighborhood. Voila! This problem solved.

 

The Great Escape

 

I'm sure you could find someone who would want the thinset for free. The grout may be a little harder to get rid of.

 

Portion the contents out into ziploc bags. Put the filled ziploc bags inside of gift bags. Give the grout and thinset away as birthday and Christmas gifts. Or any other occasion that gifts would be appropriate.

 

I could have used a ziploc of grout a few years ago for a small repair. They did not sell small amounts at whatever store it was I went to. I also vote just park it in the back of the garage or shed for later.

 

I dump it in a woodchuck hole. In your situation, I would dispose of a little in each trash pickup.