What's wrong with the hard lumps in the cement I bought? Can I still use the cement if there are small lumps in it?

We all know that cement is a common decoration material. Many people buy cement when decorating their houses. Some people buy cement with some lumps. This is a common phenomenon. It is mainly caused by moisture. So can the cement you buy with lumps still be used? Let's take a closer look!

What's the matter with the hard lumps in the cement I bought?

Cement is damp.

If there are lumps in the newly bought cement for decoration, it is because the cement has been exposed to moisture. When the cement is exposed to moisture, it will solidify and become hard lumps, like stones. This kind of cement is not expired, but because the cement has a chemical reaction with the water vapor in the air - cement hydration reaction.

Can I still use the cement I bought if it has lumps in it?

Generally, cement that has appeared in this situation has basically expired and lost its cohesiveness, so there is no need to use it anymore. The cement lumps can be filtered out. Use powdered cement to mix cement mortar for laying floor tiles on the ground. Large lumps of cohesion can be broken up and used as sand or small stones to fill the ground. It should be noted that the coagulated cement lumps have no cohesiveness after being crushed or powdered, and cannot be used as cement. Because its chemical composition has changed, although the color is similar. The rest of the powdered cement can still be used, but it cannot be used in structural projects. It can only be used in non-structural projects for surface decoration or renovation, and its cohesiveness is not particularly good.

What should I pay attention to when buying cement?

When buying cement, you should pay attention to choosing cement that has been manufactured recently. Try not to choose cement that has been manufactured for a long time and has been through the rainy season, or is located at the bottom of the cement warehouse, the window area, or the outside. Choose cement that is piled in the middle. This way, the chance of buying this kind of damp cement is small. Some unscrupulous merchants use machines to pulverize this kind of hardened cement and mix it with good cement in bags for sale. This kind of cement has poor coagulation and does not solidify for several days. This is fake cement and should be returned to the merchant.