How much does cement weigh after it has set?


In this discussion, Some thories have to be presented before treating the topic

(1) It should be understood that the reaction between water and cement is chemical and not physical and it is not reversible.

(2) The initial and final setting time of cement paste is 45 minutes and 10 hours respectively.

(3) Also it is considered that already used hardened cement is collected and broken down into smaller particles for reuse.

(4) When water is added to fresh cement powder, the whole volume of cement does not react with water completely at a time it is a gradual process. .

Therefore, at any stage of reuse of already used cement it is only a fraction that has not reacted with water initially that will now be useful and contribute to the new strength. The part that has already reacted with water and hardened will only form an inert material like aggregate.

If reuse is carried out before the final setting time, the hydration will continue in the new...

0 0

The weight of concrete varies. As the facts will show, it will depend mostly on the type.

Basic Weight Information

For fresh concrete, it is around 3,700 lbs for every cubic yard (this is assuming it is cured). The density will also determine its weight. Assuming it has a density of 150 lbs (per cubic ft), that would make it 4,000 lbs. That would be around two tons, give or take.

Reinforced Concrete

Calculating the weight will be more complicated with reinforced types. Reinforced concrete come with steel bars or rebar. On average, steel density is roughly 500 lbs for every cubic foot. That is three times more than cement.

Given this fact, the weight of concrete will be greater than 4,000 lbs. It will also depend on the type of steel bars used. The better the grade, the heavier it will be.

Other Types and Materials

Here are a few more weight examples. Asphalt comes in at 40 lbs for every cubic ft. Gravel is slightly heavier at...

0 0


If there is one question that is repeated over and over when offering different bicycles or frame sets for auction, that question would have to be - "How much does it (the bicycle or frame set) weigh?" It seems as if anyone at all interested in a vintage road bicycle wants first to know how heavy a bicycle or frame set is.

Of course, the question that comes to mind is what is so important about a bicycle's weight, or more importantly, lack of weight? Simply put and all things being equal, the lighter a bicycle is, the less energy it will require to operate. Try riding a vintage two wheeled workhorse that tips the scale at over forty pounds and then jump on a nice vintage road bicycle. The difference if feel will be stunning.

The lighter the bicycle, the faster the acceleration. The lighter the bicycle, the quicker the handling. The lighter the bicycle, the more it costs. These are a few simple and undeniable...

0 0

Explaining exactly how much a whale weighs is quite a difficult question to answer because there are currently about 80 – 90 different species of cetacea and each species is a different size and weight.

First of all the cetacean species is divided into two groups known as the toothed whale and baleen whale suborders.

The large or great/true whales belong to the baleen whale suborder and possess baleen plates and bristles while those that are smaller and possess teeth are part of the toothed whale suborder.

All species of dolphin and porpoise also belong to the toothed whale suborder.

While we don’t have figures on every animal in the cetacean family luckily there are a few facts that can help clarify this topic, and at the end of the article we’ll share some stats regarding the weights of some of the most popular whale species on the planet.

To give you a better comparison first we’ll talk about the smallest and lightest of the whale species, the...

0 0

Beware, this chicken pecks
Tip: Try to avoid cutting the chicken wire if you can. The edges are razor sharp and you will have to do a lot of pulling and pushing to get the shape right. Also you will have to apply the cement mix with your hands and you need thin gloves to work effectively. My hands were covered with small cuts and for some reason the cement made the wounds infect in a rather nasty way. You have been warned. (My wife suggested finding thin leather gloves that would withstand the sharp points. Might try that next time)

To protect myself from the sharp edges I taped the edges with duct tape. Be aware that getting the duct tape of again is nearly impossible so make sure you have enough extra length to cut the ends of with your angle grinder

Cut strips and fold them
I recommend used an angle grinder, although a good pair of pliers could do it, to cut the 90cm wide mats long enough to go from the base of the chimney, all the way around the skippy...

0 0