You are reading a single comment by @Sam_w and its replies.
Click here to read the full conversation.
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Sam_w
mespilus
Concrete typically has more water than it needs for the reaction, to aid placement.
The ground you are laying the concrete onto will act as a heat sink.
Thick slab with vibrating pole, or just relying upon gravity and tamping.
You might find a bit more time spent ensuring the upper surface is well tamped will reduce the likelihood of unwanted cracking.