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What is cement mortar? Classification and application of cement mortar in construction

Grout is a construction material created from mixing cement, water and additives. Widely used in the construction industry thanks to many outstanding advantages. To understand more about grout, let's explore the following article with Kosmos.

Cement mortar has main ingredients from cement and water
Cement mortar has main ingredients from cement and water (Source: istockphoto.com)
1

What is cement mortar?

Grout There are two main ingredients: cement and water. They have the characteristics of fast hardening and no elasticity because cement is very hydrophilic. Normally, after about 2-20 minutes of mixing, the mortar will dry out so it needs to be used immediately because otherwise it will no longer be useful.

Cement barns have good waterproofing
Good waterproof cement barn (Source: istockphoto.com)

Because of this rapid freezing ability, grout Often widely applied in waterproofing, roofing, and masonry swimming pool deck. On the market, there are many types grout with different mixing ingredients, so choosing the right mortar will depend on the specific purpose of use.

According to statistics from trends.google.com.vn, data analysis tools on the Google platform show a relatively stable level between the search volume of "grout” and “tile adhesive” between November 4, 11 and November 2023, 30. Both products tend to be searched for at a similar level, without too much difference.

Comparison table of search demand for "Cement mortar" and "Tile adhesive" in Vietnam in November 11
Comparison table of search demand for "Cement mortar" and "Tile adhesive" in Vietnam in November 11

This also proves that grout plays an important role in repairing, building or renovating houses. Stability in search about grout can show that this product is maintaining its position in the construction industry.

2

How to classify cement mortar

To classify grout, people need to rely on the following two factors.

Based on intended use

today, grout are divided into many types with many different purposes such as:

  • Mortars
  • Mortar
  • Wall plaster
  • Decorative stucco,…
Make roads with cement mortar
Making roads with cement mortar (Source: istockphoto.com)

In addition, people also produce grout to meet needs such as:

  • Waterproof mortar
  • Mortar resistant to salinity
  • High temperature resistant mortar

Based on adhesive ingredients

Usually, common, normal, grout Classified according to adhesive composition, including 3 main types:

  • Cement-sand mortar
  • Cement - lime - sand mortar
  • Clay – cement – ​​sand mortar
Sand-cement mortar
Sand-cement mortar (Source: istockphoto.com)
3

How to recognize standard cement mortar

To determine grout Whether it meets the standards or not, there are some specific ways to know as follows.

Based on water retention

To ensure quality grout, maintaining water retention from mixing to use is extremely important. When mortar is left for too long, stratification can occur, causing the sand layer to move to the bottom, while the water above causes a decrease in quality and affects construction work.

It is necessary to maintain water retention capacity for maximum effectiveness
Need to maintain water retention ability to achieve the highest efficiency (Source: istockphoto.com)

Many factors such as raw material quality, mixing method and type of mortar used can affect the water retention capacity of a mortar grout. This requires regular monitoring and control of mortar consistency and plasticity during use to ensure final product quality.

Based on flexibility

The flexibility of mortar reflects its flexibility, determined by the mixing ratio, quality of raw materials and specific mixing time.

Based on adhesion

Adhesion determines the ability of materials to adhere during construction. Mortar with high adhesion can increase product quality and prolong the life of the project.

Cement mortar for house construction
Cement mortar for house construction (Source: istockphoto.com)

To ensure good adhesion, maintaining the correct ratio of ingredients is extremely necessary. At the same time, cleaning the construction surface before plastering, cladding or covering with mortar also plays an important role.

Based on bearing capacity

Bearing capacity of grout depends on the type of binder, the proportion of cement sand in the mortar, water/binder balance, sand quality, storage conditions and time for the mortar to harden. They are often measured through units such as kN/cm2 or daN/cm2.

Based on expansion

Shrinkage and expansion represent the degree of dryness, hardness or flexibility of the mortar. Mortar with high shrinkage and expansion can easily cause cracking and peeling after completing the project.

>>> See more: Wabi Sabi interior design style - A style that often uses cement mortar to decorate living spaces.

4

How many popular types of cement mortar are there on the market?

The grade of cement mortar often indicates the strength and durability of the cement mortar grout based on the compression pressure they can withstand after hardening. On the market today, there are many types of cement mortar such as grades 10, 25, 50, 75, 100 and 125. Among them, cement mortar grade 75 and cement mortar grade 100 are the two most popular types.

Wall plaster for tiling
Wall plaster for tiling (Source: istockphoto.com)
5

What are the uses of cement mortar?

To answer the question grout what to do? Let's explore the uses of cement mortar in the construction industry and apply it to your projects.

  • Build houses, create concrete, foundations or other basic construction projects.
  • Plastering walls, paving bricks or stones, creating surface coatings in construction.
  • Repair damaged parts and renew old structures.
  • Make a waterproof layer, cover the surface to prevent water and moisture from penetrating.
  • Create foundations, floors or mortar in construction projects.
The project uses cement mortar
Construction using cement mortar (Source: istockphoto.com)
Cement mortar to bond tiles to the floor
Cement mortar to bond tiles to the floor (Source: istockphoto.com)
6

Cement mortar grade lookup table

Below is a material comparison table for cement mortar grades (grades 10, 25, 50, 75, 100 and 125) for 1m3 grout.

Distribute materials for 1 meter3 Mortar includes cement, lime and yellow sand, with yellow sand being defined as sand with a modulus index greater than 2 (ML>2).
Type of mortar Mortar mark Materials for 1m3 mortar
Cement (Kg) Lump lime (Kg) Golden sand (m3)
Yellow sand triple mortar 10 65,07 109,14 1,17
25 112,01 92,82 1,14
50 207,3 74,46 1,11
75 291,03 51 1,09
100 376,04 29,58 1,06
Yellow sand triple mortar
Yellow sand triple mortar (Source: istockphoto.com)
Distribute materials for 1 meter3 Mortar consists of fine sand, with sand determined to have a high modulus index ranging from 1,5 to 2,0 (ML = 1,5 ÷ 2,0).
Type of mortar Mortar mark Materials for 1m3 mortar
Cement (Kg) Lump lime (Kg) Fine sand (m3)
Fine sand three-composite mortar 10 71,07 106,08 1,16
25 121,01 92,82 1,13
50 225,02 67,32 1,1
75 319,26 44,88

1,07

Fine sand three-composite mortar
Fine sand triple mortar (Source: istockphoto.com)
Distribute materials for 1 meter3 yellow sand cement mortar, with sand determined to have a modulus index greater than 2 (ML > 2)
Type of mortar Mortar mark Materials for 1m3 mortar
Cement (Kg) Golden sand (m3)
Yellow sand cement mortar 25 116,01 1,19
50 213,02 1,15
75 296,03 1,12
100 385,04 1,09
125 462,05 1,05
Yellow sand cement mortar
Yellow sand cement mortar (Source: istockphoto.com)
Distribute materials for 1 meter3 Cement mortar - fine sand, with sand determined to have a high modulus index ranging from 1,5 to 2,0 (ML = 1,5 ÷ 2,0)
Type of mortar Mortar mark Materials for 1m3 mortar
Cement (Kg) Fine sand (m3)
Fine sand cement mortar 25 124,01 1,16
50 230,02 1,12
75 320,03 1,09
100 410,04 1,05
Fine sand cement mortar
Fine sand cement mortar (Source: istockphoto.com)

The above information also ends the article about cement mortar. Hopefully they will bring useful values ​​to you.

References:
  1. https://cafeland.vn/tin-tuc/ung-dung-cua-vua-xi-mang-trong-xay-dung-112250.html
  2. https://betongthientruongan.com/cac-loai-vua-va-tieu-chuan-vua-xay-dung-moi-nhat-hien-nay-2020/
  3. https://ximang.vn/nguyen-nhien-lieu/bang-tra-mac-vua-xi-mang-be-tong-trong-xay-dung-6895.htm
  4. https://meeyland.com/tin-tuc/khai-niem-vua-xi-mang-va-tieu-chuan-vua-xi-mang-trong-xay-dung-377158146
  5. http://www.betongphucthanh.com/bang-tra-mac-vua-xi-mang-be-tong-trong-xay-dung-bid52.html
  6. https://anx.vn/vn/vua-xay-dung.html

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