Ordinary Portland cement or composite Portland cement is commonly used for home decoration.

1. Ordinary Portland cement:

Ordinary Portland cement is made from Portland cement clinker, 5-20 mixed materials and appropriate amount of gypsum. Hydraulic cementitious materials. It has the characteristics of high strength, large heat of hydration, good frost resistance, dry shrinkage, good wear resistance, good carbonization resistance, poor corrosion resistance, and high temperature resistance.

2. Composite Portland cement:

Composite Portland cement is composed of Portland cement clinker, two or more specified mixed materials, and an appropriate amount of gypsum grinding. The hydraulic cementitious material made of fine particles is called composite Portland cement.

3. Identification:

Look at the packaging quality from the appearance. Check to see if a laminated woven bag with good moisture-proof properties and is not easily damaged is used, and whether the markings are clear and complete. Usually, cement produced by regular manufacturers should be marked with the following:

Registered trademark, place of origin, production license number, execution standards, packaging date, bagged net weight, factory number, cement type, etc. Inferior cement is often unclear about this. Second, carefully observe the color of the cement. Generally speaking, the normal color of cement should be off-white. If the color is too dark or changes, it may be due to excessive other impurities.

Extended information

Application and purchase:

In home decoration, cement mortar is used for pasting floor tiles, wall tiles and masonry. It can not only enhance the adsorption capacity of the surface material and the base layer, but also protect the internal structure. It can also be used as a leveling layer for the rough surface of the building. Therefore, cement mortar is an essential material in decoration projects.

Many customers believe that the greater the proportion of cement in the entire mortar, the stronger its adhesion, so they often disagree with decoration companies on the amount of cement used. In fact, this is not the case. Take the pasting of ceramic tiles as an example. If the cement label is too large, when the cement mortar sets, the cement will absorb a large amount of water. At this time, the surface tiles will easily crack due to excessive moisture absorption, shortening their service life.

Cement mortar should generally be mixed at a ratio of cement:sand=1:2 (volume ratio).

There are many varieties of cement on the market, including Portland cement, ordinary Portland cement, composite Portland cement, slag Portland cement, etc. Commonly used for home decoration is ordinary Portland cement. or composite Portland cement.

Baidu Encyclopedia - Cement

Baidu Encyclopedia - Ordinary Portland Cement

Baidu Encyclopedia - Composite Portland Cement