What type of cement is the correct grade for self-built houses in rural areas?

In rural areas, the cement used varies depending on the height of the building. If your home is a three-story or five-story home, you can use ordinary Portland cement with a PE strength grade of 32.5 to 42.5, but it is best not to use R early-strength cement because this type of cement is easy to crack. Cement can be used in large projects. 42.5 cement, its price will be higher than 32.5, and the cement strength will be higher. When constructing, do not mix different types or brands of cement. It is best to use only one brand of cement when building a house, and do not mix different types of cement from the same brand; when the temperature is below 0, do not use ordinary cement. For long-term high-temperature applications, refractory bricks can be used to insulate and protect ordinary mortar or concrete. If the temperature is high, special heat-resistant concrete should be used for pouring, or a certain amount of ground heat-resistant materials should be mixed into the cement. Concrete or plaster layers gradually corrode and disintegrate, and cement should not be corroded by acids. For projects that strictly require acid corrosion resistance, ordinary cement is not allowed to be used.

Six details that should be paid attention to when using cement in self-built houses in rural areas:

First, the cement in self-built houses must be moisture-proof, which will reduce or even lose its original strength.

Second, self-build cement should not be exposed to quick-drying concrete or plaster. If exposed after surgery, its strength will be reduced or even completely lost as water evaporates rapidly.

Third, avoid negative-temperature cold-mix concrete or mortar when building self-made cement. If it is cold, the cement cannot hydrate and freezes and expands when exposed to water. The concrete or mortar will gradually deepen from the outside to the inside. damage, so construction should be carried out in strict accordance with the "Winter Construction Regulations for Construction Projects".

Fourth, the cement used in self-built houses should avoid mortar layers or concrete components that have been cured by high temperature heat.

Fifth, self-built cement should avoid water, dust, and thickness. People often overlook the impact of water consumption on the strength of concrete. In order to facilitate concrete pouring during construction, sometimes the mix ratio is not carefully implemented and the concrete is mixed very thin.

Sixth, self-built cement avoids acid corrosion. The acidic substances and calcium hydroxide in the cement will cause a neutralization reaction. The product will be loose and swollen, and will easily hydrolyze and pulverize when exposed to water.