Is cement okay without sand? What is cement without sand called

Yes.

In fact, it is also feasible, and in terms of the speed and strength of condensation, in some cases, the effect is better than that of mortar with sand, but it will be more difficult when it is constructed, if it is not added.

Sometimes the strength is slightly higher, but it will make it more difficult to work when building the wall, and if you don't add sand, mix the cement mortar.

It is also very difficult, so the construction time will be extended.

Cement precautions.

Avoid exposure to the sun and dry quickly. If the concrete or plastering is exposed to the sun, then the moisture in the cement will evaporate quickly, and the strength will decrease, therefore, before the construction must be strictly cleaned and fully moistened the cement base, after the construction must be covered, in accordance with the provisions of the regular watering and maintenance.

Avoid freezing at negative temperatures. After the concrete or mortar is mixed, if the cement is frozen, the cement can not be hydrated with water, and the water freezes and expands, then the concrete or mortar will be gradually destroyed by the materials in the cement composition, so the construction should be carried out in strict accordance with the winter construction regulations of the construction project.

No.

Cement is prone to shrinkage problems without adding sand.

Once the cement hardens without adding sand, it is likely to shrink, which in turn will increase the possibility of cracking in the later stage. Cement is a water-based material, and the initial setting stage should ensure that the surface is moist to avoid excessive loss of water, so as to reduce the probability of cracking.

Pure cement is generally used in house decoration, such as tiling, scraping putty and filling some small gaps. Pure cement is also known as plain ash, the viscosity of pure cement is relatively good, but it is more brittle after curing, so it is particularly suitable for use in house decoration. The above is the answer to the question "under what circumstances to use pure cement", and the next is the supplementary content about pure cement, interested audiences are welcome to continue**.

1. Discharge bubbles: Before using pure cement, it is best to stir it first, so that the bubbles of pure cement can be discharged as much as possible, and the hardness of this pure cement will be improved to a certain extent.

2. Hardening of pure cement: pure cement is different from other cement mixed with sand, so that it should be kept as moist as possible when solidifying, and pure cement can be completely hardened after waiting for a preliminary molding.

3. The hardness of pure cement: after the pure cement is completely dry, it will be more brittle, similar to the conventional bricks, so if there is no support such as steel bars, the pure cement is likely to be broken when it falls to the ground after it is dry.

4. The cost of pure cement: The cost of pure cement is usually higher than that of other mixed cements, but pure cement has the benefits of pure cement, and it can be used on demand when it is used.

Cement that does not use sand is called sand-free concrete. As the name suggests, it is a kind of porous lightweight concrete made of coarse aggregate, cement and water mixed with concrete without sand.

It does not contain fine aggregates, and is coated with a thin layer of cement slurry on the surface of coarse aggregates, and the contact points between the stones are cemented by the cement slurry to form pores and evenly distributed.

honeycomb structure.

How cement is stored

The cement should be stacked neatly, the height of the bagged cement pile is generally not more than 10 bags, and the width of the pile is limited to 5 10 bags. Bulk cement should be placed in a special moisture-proof warehouse. If it is temporarily stacked in the open air, it should be covered with a rainproof cloth.

Due to the strong moisture absorption of cement, it should be moisture-proof and waterproof during storage and transportation. The cement warehouse should be ventilated, and the cement bags should be stacked on wooden boards 20 30cm high.

Different varieties, different grades and different dates of cement should be stored separately and should not be mixed, especially silicate.

Cement-like cement cannot be mixed with aluminate-like cement to avoid mutual reaction, which will reduce the strength.

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Cement mortar is a more commonly used building material, usually cement and sand, water in a certain proportion of mixing, we often use it to pave tiles, pin for wall plastering, etc. Some owners want to use cement directly to pave wall tiles when laying wall tiles, so can cement be used directly without sand? Next, I will briefly introduce it to you.

1. According to Qeeka Home experts, general cement needs to be used with sand. Cement ** is relatively high, if you don't add sand to use cement directly, not only the cost is high; In addition, the finished items are very hard and prone to cracking, and they are also prone to flow deformation. The mixed use of cement and sand can reduce the cost of concrete production; We mix the cement mortar well, and the hardness of the cement mark can be fully reached; Sand is also good for keeping the cement solidified.

2. We call cement, sand and water as cement mortar, which is often used in the construction process, such as wall masonry, plastering, tiling, etc. Cement mortar is generally mixed on site, and its ratio is related to the actual strength of cement and the level of construction. For example, if you use 325 cement, strength, then the ratio of cement and sand is.

3. Nowadays, there are a variety of new decoration building materials on the market, such as tile adhesive and so on. Many owners will use tile adhesive instead of cement mortar for tile paving. Tile adhesive is an ideal adhesive material, and its adhesion force is several times that of cement mortar, which can prevent hollowing and the risk of falling bricks; It also has the advantages of waterproof, crack resistance, high temperature resistance, non-toxic and environmental protection; It is widely used in the pasting of indoor and outdoor wall tiles.

When we mix and mix cement mortar, we must mix it in accordance with the relevant standards, otherwise it is easy to have the problem of insufficient adhesion of mortar.

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In fact, without adding sand and stones, the hardness of pure cement will be quite high.

Sand and gravel is very cheap, cement is much more expensive than sand, adding them can reduce the cost of concrete production--- in concrete, an important role of cement is to cement sand, stone and other materials firmly together).If you mix it sufficiently, then the hardness can reach the grade of cement

For example, No. 425 cement, the compressive strength of the cement cake can reach 425 kilograms of square centimeters.

However, there are a few things you should pay attention to:

1. Cement is a material with the hardness of He oak water, and in the process of solidification, it must be kept moist at all times (covered with a wet cloth, or covered with a wet straw mat, pay attention to watering, and after it is initially formed, you can throw it into the bucket, and the cement can be hardened under water).

Note: Before the cement is completely solidified, the hardness is very poor, do not pinch or touch it casually.

Ordinary cement takes 6-7 days to solidify, fast-drying cement takes about 72 hours, and imported grouting cement only needs 24 hours.

2. Pay attention to stirring and discharge the bubbles of the cement, which can increase the hardness of the cement--- although it is hard enough without stirring. 3.Note that after the cement solidifies, it will become more brittle, similar to bricks and stones, and if you don't add reinforcement, this cement cake is likely to break if it falls to the ground.

<> cement and sand are the basic materials commonly used for wall and floor plastering, and its function is to increase the adhesion and hardness of the plastering layer. If the cement is not sanded, the plastering layer may be too dry and prone to problems such as cracks and peeling.

Of course, if cement is to be used without sand in certain situations, such as when making some special shapes of bright walls or floors, it may be necessary to use special varieties of mud or add other materials to control its fluidity and adhesion.

In short, in general, cement and sand are commonly used plastering materials, if cement is needed without sand in special cases, it needs to be adjusted and properly treated according to the specific situation.

No way!

Cement cannot be used alone without sand, because cement does not have the ability to fill, bond and resist compression. In actual construction, cement and sand are usually mixed in proportion to make the spike hidden, so as to achieve the strength and durability required by the design.

If you don't add sand, what is made directly from cement will be very hard.

Cement is more expensive than sand, and the cost is higher when cement is used directly.

Cement solidifies sand and stone together, making it stronger and stronger.

1. In fact, it is also feasible for the stool wheel to collapse, and in terms of the speed and strength of the condensation of the tong ruler, in some cases, the effect is better than that of the mortar with sand, but it will be difficult to raise the jujube circle during construction.

2. If you don't Gaza, sometimes the strength is slightly greater, but it will make it more difficult to operate when building walls.

3. If you do not add sand, it is also very difficult to mix cement mortar, so the construction time will be extended.

It can be seen that adding a certain amount of sand to cement is also beneficial. In practice, we can mix sand and gravel in an appropriate proportion, which not only does not reduce the grade of cement, but also increases the strength and improves the efficiency of construction.