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Dangers Of Excess Water In Concrete;
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Dangers Of Excess Water In Concrete

Mixing water control in concrete dosing is essential and important to obtain the best results in all types of constructions.

It is known that any rational dosage of concrete starts from the value known as the “water/cement ratio,” that is, the number of liters of water, divided by the number of kilograms of cement used for a given volume of concrete.

And the resistance of this concrete, for equality of materials and processing conditions, depends on the water/cement ratio. When it falls, the resistance increases, and if on the contrary, it rises, the resistance decreases.

The increase in water above the amount stipulated in the design inevitably decreases strength and other properties, unless an additional amount of cement necessary to keep the water/cement ratio constant is incorporated into the mixture.

Definition Of The Water / Cement Relationship

Concrete is a material that is obtained from a mixture of components: binder (cement), aggregates (sand and stone), water and, optionally, additives. The paste, composed of portland cement and water, joins the aggregates, usually sand and gravel (crushed stone), which creates a rock-like mass. In this water/cement relationship, the importance of water is of great magnitude, since it and its relationship with cement are highly linked to a large number of properties of the final material that will be obtained, where usually as more water is added, increases the fluidity of the mixture and, therefore, its workability and plasticity, which presents great benefits for the workforce; however, resistance also begins to decrease due to the greater volume of spaces created by free water.

Thus, it can be said that the strength of concrete depends highly on the weight ratio between water and cement.

Also, curing as mentioned in a previous article is very important, since, if this process is done badly, up to 30% of the expected resistance could be lost; Therefore, it would be advisable to do so for 28 days It should be noted that the resistance specified to concrete, approximately 70%, is generated in the first seven days. At 14 days, resistance has reached 85% of what is expected in 28 days.

Consequences Of Excess Of Water In The Concrete

Within the specified limits of bursting and water-cement ratio, all excess water should always be avoided. In this context, it is considered that there is excess water, in casting conditions, if supernatant water (vertical segregation) or water runoff from the sides of the formwork (horizontal segregation) is observed. Excess water also aggravates surface defects by increasing leaks in the formwork through any hole.

The final result can be:

  • Formation of honeycombs, sand streaks, variations in color, or soft spots on the surface.
  • In vertical formwork, the rise of water generates weak planes between each deposited layer. In addition to the damaging structural effect, these planes, when hardened, contain gaps through which water can pass.
  • In horizontal elements, such as mezzanine or firm slabs, excess water tends to rise and forms a weak surface layer. The said layer offers little resistance to compression and abrasion, considerable shrinkage, and, in general, low quality.

Conclusions

  • For the realization of the concrete mixture, it is necessary to keep in mind five very important factors: the Water / Cement ratio, granulometric distribution, water quality and of course the consistency of the mixture and finally concrete resistance.
  • The excess of mixing water is a danger already recognized by the builders, and unfortunately, the damages that it entails appear at a too late age to be remedied without high costs.
  • To obtain an appropriate specified concrete strength, it is always advisable to carry out the material and dosage tests in the Concrete Mix Design.
Which Partition To Choose To Replace The Fence In The Garden?;
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Which Partition To Choose To Replace The Fence In The Garden?

Are you tired of the unsightly roasting around your garden? Our website gives you the keys to choose your fence: wood, natural or stone.

The garden is a bit of an extension of your home. You want it to be cozy and if possible aesthetic. It must be admitted that there is really more beautiful than a fence to define your green area. A small panorama of the different fences that we can find, according to your tastes and your budget, to provide yourself feel good at home!

Close your garden with fences

There are all kinds of offenses :

wooden fences : they have a natural raw appearance but require a lot of maintenance (paint, varnish, stain …). However, they are the most ecological and the most solid! Their variant in composite wood is also very resistant.

metal fences : robust, they present a risk of rust , and are quite expensive.

PVC fences : pretty fences, a little expensive and easy to assemble, but they take less time than wood.

aluminum fences : you fancy, with the colors of your choice! Contemporary and trendy, they require little maintenance, but are more expensive!

wrought iron fences : rather classic but elegant, these decorative fences require regular maintenance.

Choose a plant hedge for your garden

The garden being the paradise of the greenery, as much continue on this momentum and create green hedges . In addition to being aesthetic, they respect the environment. You can either combine a traditional fence with climbing plants , or even make the choice of shrubs online, with photinia or privet for example. But think that they will have to give them some time to grow and then they will have to be pruned and maintained regularly (unless you choose artificial plant hedges!).

The alternative of natural canes, reed, wicker or ferns can be considered: they allow to keep the side “nature” while being operational immediately.They are sold in rolls of several meters and are fixed on stakes with wire of Like natural broccoli (coconut or heather).

Protect yourself from the eyes with blackout panels

Blackout panels (also called clusters) are trendy because you can combine several with patterns, colors and different materials. They can be wooden, steel, aluminum, metal, braided, solid or perforated.

They are assembled in the manner of a kit, ready to install. As they are sealed on the floor, they require the intervention of a pro (unless you are good at masonry) because to be resistant to wind and weather, you must fix your panels.

Stone or concrete: bet on a hard fence

It may be interesting for you to invest in a concrete wall or a stone wall because they are very resistant. And over time, you’re a winner, even if the necessary investment is a little more expensive. A pretty dry stone wall will give character to your home, just like a brick wall. Solid, they guarantee privacy in your property. They can also be used as sound insulation if you live near a busy street. There are also Gabion walls , a kind of wire cage that is filled with natural stones to beautify the garden with a modern effect.

The solutions to partition your garden are so many: take the time to consider everything before you start!…