How much weighs the bucket of rubble. The proportion of different cement hippers. Properties of different marks

Specific gravity - This is an indicator that shows the weight ratio to occupied volume. In other words, this is a density indicator. This parameter is very important to know when choosing a cement, because then you can correctly form the proportions of mixtures obtained based on them. For each cement brand, its proportion is characterized by its share, which we will try to consider further.

The construction literature contains information on the proportion of solutions in the mass ratio. It is composed on the basis of cement binder, therefore, the proportion can be different, and depends on the following factors:

• the degree of clinker grinding;
• material drying method in special chambers.

For freshly ground material, density indicators will be minimal. The reason is that each element when the helix is \u200b\u200bmagnetized and tries to be as far as possible from its "neighbor." In this case, the weight of the cube will reach 1100 kg. If the material is stored for a long time or transported, then the indicators of its density, on the contrary, increase and can reach 1550 kg / m3.

What is the limit of the values? The reason is that emptiness air is formed between the cement particles. Even if the material lies for a long time on the fold, then 1 \\ 2 part of its volume will be air.

The presented calculation plays one of the fundamental roles in determining the composition of concrete or when implementing dry construction mix. In this case, the crane is important to accurately choose the rational composition of the fillers of different size. To eliminate all the emptiness that occurred. It is necessary to take the sand of the middle fraction and place to the material at the moment when its particles begin to fill the maximum volume. After that, we fall asleep sand with a shallow fraction. As a result, it is possible to obtain a structure in which there are no emptiness.

What is the consumption of cement sand mix, can be read from this

Currently, the construction market has the following cement marks: M200, M300, M400, M500, M550 and M600. It is the brand that affects the strength of cement, as a rule, it is on compression or bending. But the strength limit determines the proportion of the material. In order to get a mixture with the necessary characteristics, it is worth knowing the density of a particular brand and the fillers used.

In the role of fillers to obtain more durable and heavy cement fractions, such solid ponds like crushed stone and gravel are used. Thanks to this composition, it is possible to achieve all the supporting structures necessary for the installation, the parameter foundations.

Measurement of various marks

Today, cements produce reduced and high density. For the second species, the substance is characteristic of which there are no additives. Specific gravity building materialsWhen receiving which plasticizers or other additives were used, it is determined taking into account their percentage ratio. The advantages of the low density cue are to apply a large mixture. But for such a material, the main drawback is characteristic - high porosity.

To determine the bulk density of the material, it is necessary to be guided by its brand.

When using such brands like:

If we consider the cement of the most common marco, then the bulk density for sand-cement solutions It will reach from 1700 kg / m3, and for cement-perlite - 100-1400 kg / m3. The density value can be adjusted during production. To do this, it is necessary to increase the amount of iron phase content or simply add barium oxide. Most often when performing construction work Apply such cement brands like M200, M300 and M400.

Learn about specifications Cement lime mortar M 75 can be from this

M-200

This brand is in great demand in the construction of floors, grounds, floor screeds, installation building structures. Marking M200 indicates that the ability of the frozen mass can withstand the load of about 200 kg / cm2.

This material is included in the light category. The presence of low density indicators are due to the presence of hollow fillers. The value of mass here is affected by the ratio of water, sand, rubble and other ingredients. The specific mass for this material will reach 1500 kg / m3. For the manufacture of M200, you must use:

• one part M400 or M500;
• water, the amount of which is determined at the rate of 40 l per 10 kg of the mixture;
• 2 pure sand;
• 48 pieces of gravel, rubble.

When choosing the material it is very important to pay attention to all these parameters to purchase a quality product.

The specific weight of any substance is the ratio of weight to the object occupied. In principle, this means practically the same as the density. It is important to know the proportion of cement, first of all in order to properly compose the proportions of building mixtures prepared on its basis.

What density depends on?

Most often in the construction literature in the mass ratio, the proportions of solutions based on cement binder composition are indicated, therefore volume weight Maybe many ways depending on:

1. the degree of grinding of clinker (grain sizes);
2. what method was carried out drying in special silo.

A smaller density will have freshly ground cement. This is due to the laws of electrostatics. Each particle during the help is magnetized and strives to be away from the "neighbors" with intensive friction. In this case, the weight of the cement cube will be 1100 kg. The reverse process occurs during transportation or during long-term storage - the charge is lost, and the powder is gradually compacted, its density increases (up to 1550 kg / m 3).

Other indicators help learn how much cement weighs:

1) averaged bulk density. According to the norms assigned to the enterprises of the Rube, the weight of the cement is 1,300 kg.

2) True densityinherent in building material. According to him, the weight of the cubic meter is about 3 100 kg / cube. m.

What is explained by such paradoxical variation of values? The fact is that air voids are between grains of cement powder. So, even in the detached material, at least half of its volume will necessarily take air.

Such calculations are particularly important in the process of calculating the composition concrete mixes, as well as the release of a dry building mixture, for example - sand concrete. In this case, it is necessary to choose the rational composition of the aggregates (for sandbetone it is sand) of various size. At the time when large grains begin to fill in the maximum volume, then it is necessary to place some part of the sand of the middle size, and in the end they fall asleep fine sand. At the outlet, we obtain a structure that does not have voids.

Influence of brand on indicators

To date, such brands are presented on the market as: M400, M500, M550 and M600. It is important to know that the brand largely determines the strength of the material, primarily on compression or bending. The tensile strength, in turn, determines the density. In addition to a simple portland cement, such species as plasticized, slag-farm cement, hydrophobic, pozzolane, sulfastic, alumina and others are produced.