Boats made of cement can float as can those made of steel. They do it by displacing water. See the link below for some history and reference to a book about cement boats.
they dont float they are built on partly land and partly cement columns
Take a fluids class
A canoe stays on the water and does not sink due to the principle of buoyancy, which states that an object will float if it displaces a volume of water equal to its weight. The canoe's shape and design allow it to displace a significant amount of water, creating an upward buoyant force that counteracts the downward pull of gravity. Additionally, the materials used in constructing a canoe, such as wood or plastic, are less dense than water, further contributing to its ability to float.
Probably a rollar skate. (Not sure. :-|)
To spread cement, you typically use tools like a trowel, float, or screed. A trowel is useful for smaller areas and finishing edges, while a float helps to smooth the surface. For larger areas, a screed can be employed to level the cement evenly across the form. These tools help ensure a consistent and smooth application of the cement.
The block isn't aerodynamic, so it sinks. The boat, no matter what it's constructed with, will be able to float if it's in a shape that will be aerodynamic in water.
if shaped like a boat and wide enough, maybe... see bernoulli's principle
The field test of cement are 1.Insert the hand in cement bag,one should feel cool. 2.Rub the cement between fingers,one should feel silky 3.Through handfull of cement in a bucket of water it should float before it sinks.
a spirit canoe is an invisible canoe. neigther the canoe of a spirit or the spirit of a canoe.
Cement, aggregate, slump, set, float, screed, finish, pour, broom, form.
The question is an error. It should be what is a Micronesian Outrigger? A type of canoe used in many Pacific islands with sail and a steadying float out to one side, which is the outrigger.
€12 per square metre for scud scratch and float