Key elements of wet mortar quality control: Dry and thin problem

1. The problem of dry and thin mortar refers to whether the mortar is too dry or too thin.

If the mortar is too dry, it will be difficult for the mixer truck to unload the materials. Workers must frequently add water to the mortar to stir it for normal construction. When the mortar is too thin, workers cannot use it normally and it is difficult to scrape it onto the wall.

2. When controlling the dryness of the mortar, you can judge it by testing the consistency of the mortar.

The factory consistency of the mortar is controlled at 75~85 (the thinner the mortar, the greater the consistency value). The consistency of the mortar will increase with longer mixing time. The mortar shipped from the factory is transported and mixed. The consistency after arriving at the construction site will increase by about 10 (the consistency of the mortar at the construction site is controlled between 90 and 100, so that workers can obtain the best use results).

3. The proportion of water in the mortar is the most important factor in adjusting the dryness and thinness of the mortar.

The operator should pay close attention to the moisture content of the sand and go to the sand field to observe and judge the moisture content of the sand before production.

4. The mortar may be too thin especially on rainy days.

In this kind of weather, try to dry the mortar during production. Pay special attention to whether the mixer truck is anti-drum when loading. And clean the accumulated water in the drum. Otherwise, the mortar will be extremely thin.

5. After the mortar arrives at the construction site, if it is too dry, workers can add an appropriate amount of water for mixing before construction.

It won’t cause any big problems. But when the mortar is too thin, workers cannot handle it. Only cement can be added for mixing. Large quality fluctuations will occur. Sometimes workers would go on strike unwilling to use mortar that was too thin. Therefore, when producing mortar, it is better to be dry rather than too thin to prevent quality problems or worker strikes.

6. Check the material table to see if the mortar in the mixing truck is too dry.

Do not add water on the material table. It is also normal for the mortar to be too dry when it leaves the factory. It will become thinner after mixing and transportation. If you look at the material table, you will see that the mortar is too thin. Be sure to return it to the factory for additional material to adjust to the appropriate dryness and thinness level. Otherwise, the mortar will become extremely thin after arriving at the construction site and cause scrapping.