How can I lift bags of cement of 25kg (55 lbs)?

That’s a problem in the States as well. Two ways to do this - get someone to help unload and put the bags where you can get a bucket under them, or just empty into a 5 gallon bucket at the shop, having either one of the employees help or pulling the bag a bit away from the pallet and emptying into a bucket. It may take a couple buckets, but if you can get the weight down by half, you should be able to pick them up

Been there, done that! I had the store set them in the trunk of my car on an old plastic tablecloth. When I got home I opened each one and transferred half of each bag into a bucket so I could carry it. It took several buckets, but sometimes you can get them for free from bakeries or fast food restaurants. Many food products come in plastic buckets.

I'm old so have the same problem. I put a tarp on the carpet in my trunk, then have staff put the bags on the tarp. When I get home, I slit the bag open and put the cement in buckets that I can carry.

Thank you. I wouldn't be able to half empty a bag in the shop as long as I haven't passed the pay terminal. They wouldn't let me. Also, all the dust it provokes when you empty a bag... I am not ready to do that in my car arriving at home. There must be another way to lift those bags.. It is not really the weight that causes problems, it is the fact that you can't grab them as the bags are so full or even slide them without the risk they being torn up.. you can't pick them up in the middle because they just collapse. (same thing with bags of 40 L garden soil) Normally you have to slide you arms under it and lift them up vertically what I cann't do.

They shouldn't be that heavy, for no-one.

Can you have a flannel backed vinyl tablecloth placed in your car, with a 6" section closest to your trunk or liftgate folded under (would be used by you to slide bags onto a sturdy ramp, to drag them from your car)?

Placing a tarp or additional heavy vinyl tavlecloth between each bag would enable you to grip and drag each bag onto the ramp, for deposit onto your driveway or another tarp.

Putting them in back seat/front seat is easier removal can slide them out instead of lifting up & out of trunk,cover it well of course. Buy your self a wheel barrow you can slide bags out of back seat into wheelbarrow then wheel them to where ever you need them. Don't hold the ends of the wheelbarrow handles you'll have more control with heavier loads by stepping inside of the handles holding them closer towards wheel barrow body. You can move huge/heavy loads by yourself like this. Dump bags out of wheel barrow sideways instead of front ways it's easier you don't need to lift the handles up.Roll the bags if you need to move them on ground instead of trying to lift or put/roll them on plastic tarp and drag them. You can probably rent a wheel barrow depending where you live if you don't own one. I'm 5'6" 135lbs and have done landscaping,construction,farm work most of my life moving things that weigh my body weight even more. Just take your time & just because most woman don't have the upper body strength men do, doesn't mean it cannot be done.

I have had several back surgeries and understand your dilemma. I have a plastic tarp in the back of the car. Set bags on plastic tarp. When you arrive home, place your wheelbarrow or wagon next to your trunk. Pull the plastic tarp out of the car and let them tumble into your wheelbarrow or wagon. Works best with only one or two bags. I have had to make several trips over a period of several days if I need a lot of something. I have the strength but don't want to risk yet another surgery.

By off chance do you have a neighbor that might be kind enough to help you out? Sometimes I can get help. There is a fireman that lives across the street from me, but being a fireman, they have crazy schedules and he is on duty when I might have a load.