6 Experience in choosing the best quality construction sand!

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6 Experience in choosing the best quality construction sand!

The selection of building materials seems to be quite simple, but its nature includes many things, many types, if at first glance, surely people will not know what materials they are using. Is it good, quality or not? So take 15 minutes to learn about Sand (an extremely important material in construction!) ...

I. Knowledge of Construction Sand

  • Sand is one of the very important structural components in the building of a house. When looking at the wall we see the cracks of crow's feet or the edges of the wall, the very fragile edge of the column is the main reason in the type of sand that we have used.
  • Choosing sand with less impurities and dirt will help you to best complete your home. If you accidentally choose the right types of sand containing a lot of dirt and impurities, it will cost you time, effort and money because the floor must filter out all impurities, mud, ... before construction.
  • However, the methods of manual screening through the above mesh are only limited somewhat. In order to ensure absolute cleanliness for construction sand, there must be a factory with sand washing and sand mixing stages.
Note: Because sea sand has salty salt, it will cause corrosion for reinforced concrete structures, so it is not possible to use sea sand to build houses.

Here are 6 Tips for Determining Good Sand Quality

  • Take a handful of sand, hold your hand, then open it. Thus, dirt, dust, mud will stick to your hands to help us determine whether the sand is clean or dirty. Quality sand is sand that does not contain dirt, clay, mica, seashell ... Should not choose this sand or for reasons of budget to choose, you need to carefully screen before using.
  • Drop sand in half of a glass jar, sand will settle down, dirty mud will float on top, you will check the concentration of dirty sand in the building. If the content of mud and dirt exceeds 3% of the total amount of sand when put in, it should be cleaned and screened before use.
  • Alum or salty sand should not be used in rough concrete and masonry. Scum water is greasy sand, yellow water is alum sand.
  • Experience in buying construction sand: It is necessary to choose the right sand for the purpose to be built
  • Large grain sand used to pour concrete.
  • Middle grain sand for wall construction and wall painting
  • Fine-grained sand is used to level the foundation
  • When choosing units to supply construction sand, you choose units close to the construction to minimize material spillage. Will lead to a lack of volume.
  • Choosing a long-standing, reputable building material supplier with a wide range of products will help advise on choosing the best material and suitable for your project.

Here we will guide you to choose the type of sand used for: Construction, Concrete Pouring, Backfilling. And how to distinguish sand types in the article below. Specifically, construction sand will be divided into 3 categories including:

1. Cat To Construction

Construction sand is usually dark brown, close to black, gray, fine grained, clean sand, without impurities, used in plastering or paving civil works. in fact this grain of sand is relatively large. This is the flesh of the buildings so it can be said that construction sand plays an important role in construction, especially for the construction of houses.

Mechanical and physical criteria for sand for construction:

Modulus of minimum magnitude must be 0.7, larger is better

- Content of sulphate base salts, sulphites in the sand of construction shall not exceed 1% of the total mass

- The content of organic, soil and mud should not exceed 3% of the total weight

- Not allowed to have gravel contents 5-10mm in diameter

- In addition, other impurities in the form of lumps, together with clay and sub-clay are also not allowed to exist in the sand for construction.
As you have found out the information above: using sand to support the completion of works, creating a beautiful surface, bringing high aesthetics to the works.

2. Golden sand in construction

Golden sand with yellow color, particle size from 1.5-3mm, is used for pouring concrete, free of impurities, chemical composition specified in standards. Can be built with golden sand. If using golden sand to build, the wall will quickly dry out, but the downside is that it increases costs.

When choosing building materials, you should not choose yellow sand for plastering because the wall will make the surface of the wall rough, not smooth, causing difficulties and lack of aesthetics when painted as when plastering with sand for construction. Golden sand should only be used when pouring concrete, bracing, pillars, to ensure firmness.

Mechanical and physical criteria for concrete sand:

  • Modulus of magnitude from 2.0 to 3.3.
  • With the naked eye you can also recognize this material because it is yellow
  • No impurities, ensuring cleanliness
  • Content of sulphate base salts, sulfites shall not exceed 1% by weight.
  • Content of gravel with a diameter from 5 to 10mm does not exceed 5% by weight. The mika content in sand should not be more than 1% by weight.
  • When building for ordinary family houses, it is only necessary to use the naked eye to distinguish. If the actual construction, sand particle size is not met, it can be used to select the desired particle size. The use of sand sieve will help remove impurities in the sand to ensure the quality of sand for construction works.

Note: When mixing concrete with golden sand, the sand should be screened again for small and even sand grains, washed and then kneaded with the concrete mixture. It can be said that construction sand is very important for the construction of your house, did you know that if using fine sand that measures like large grained sand to pour concrete, the concrete strength decreases by 30%? So we often clearly distinguish between large-grained concrete sand and fine sand to ensure the best quality concrete for your home.

3. Backfill sand

This type of sand is like black sand. Therefore, leveling sand is often used to level the foundation to make the building stronger, stronger, not affected by natural factors. Due to the need to be used in large quantities, the cost of this sand is usually the most cost-effective to bring the most economical housing project during construction and construction.

Absolutely do not use sea sand during construction and construction. Because salinity in the sand will cause corrosion for reinforced structures, sea sand cannot be used to build houses.

Mechanical and physical criteria for sand fill:

Sand reclamation and sand specifications do not need to be chosen too harshly. The only factor to consider in this sand is the cleanliness required.

The sand cushion is effectively used for soft soil layers in the water saturation state (soft clay, silt clay, sand mixed, mud, peat ...) and the thickness of soft soil layers is less than 3m.

The price of fill sand is cheapest compared to other types of construction sand. The fill sand is fine black sand, but the particle size is not uniform, possibly mixed with some impurities.

SUMMARY OF EXPERIENCE SAND SELECTION IN CONSTRUCTION
In fact, for large projects, the new contractor needs to pay more attention to the quality of sand with the above test methods. As for most basic and civil constructions, most families only observe with the naked eye, or use tips to select the desired particle size by screening.

  • There are three types of sand used: yellow sand, construction sand and fill sand. Golden sand has the highest cost, black sand is a fine grain commonly used for construction, plastering and paving, and sand is used in the cheapest foundation.
  • Sand has many types each serving a purpose of building each different location such as pouring concrete, building a bowl, filling the foundation, ...
  • Note that sand should be cleaned before being put into use, especially sand with concrete and sand, plastering, ...
  • Using small sand to plaster is a big mistake that developers do not know. We recommend that you use a minimum of medium grain sand or more.
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