Pierre Henry working with induction coils to regulate sound spatially On the premiere of Pierre Schaeffer's Symphonie pour un homme seul in 1951, a procedure that was suitable for the spatial Charge of sound was tested. It was named a reduction desk (pupitre de reduction, and also generally known as pupitre d'espace or potentiomètre d'espace) and was meant to control the dynamic level of audio performed from quite a few shellac gamers. This made a stereophonic result by managing the positioning of the monophonic seem source.[34] 1 of five tracks, supplied by a function-designed tape device, was controlled via the performer and another four tracks Each and every provided one loudspeaker. This furnished a combination of Stay and preset sound positions.

Concrete is sometimes used as a hearth safety for steel frames, for the same effect as previously mentioned. Concrete as a fireplace shield, such as Fondu fyre, can be used in Intense environments like a missile start pad.

Given that you realize the amount of concrete combine you require, it’s time to figure out the amount of baggage you’ll use. To do that, divide the cubic yards through the bag yield.

Superplasticizers (also known as high-variety water-reducers) are a class of plasticizers which have much less deleterious effects and can be employed to boost workability over is realistic with common plasticizers.

Bonding agents are made use of to make a bond in between aged and new concrete (generally a kind of polymer) with large temperature tolerance and corrosion resistance.

Big quantities tend to be transported by truck, poured free of charge less than gravity or through a tremie, or pumped through a pipe. More compact quantities may very well be carried in a skip (a steel container that may be tilted or opened to release the contents, commonly transported by crane or hoist), or wheelbarrow, or carried in toggle bags for handbook placement underwater.

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Second, integral reinforcing metal gives present day concrete assemblies terrific power in pressure, Whilst Roman concrete could depend only on the toughness from the concrete bonding to resist pressure.[twenty five]

For bigger-toughness apps, accelerated curing strategies could be placed on the concrete. A typical approach includes heating the poured concrete with steam, which serves to the two maintain it moist and lift the temperature so that the hydration approach proceeds a lot more rapidly and a lot more extensively.

Enter the depth, width and duration within your concrete footing to compute the amount of concrete essential to complete your job.

Consequently, variation in sizes in the mixture minimizes the price of concrete.[forty nine] The aggregate is sort of always more powerful in comparison to the binder, so its use won't negatively impact the toughness in the concrete.

Particularly built to resist the weight of the concrete slab as well as the rigors of foot traffic. Prodex displays under nine% compression in thickness when subjected to masses related to conventional concrete flooring methods.

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social act. Within the Cambridge English Corpus The actual amarillo concrete slabs explanation (in contrast to bare description) of events rests inside the powers and liabilities with the concrete