Recent content by Rony

It will shrink if the cement content is too high. However, I guess adding too much cement to the wet-mixed mortar is impossible since the cost cannot bear it. It may be that you using too much retarder.

There is no problem with the stability of the product. The admixture is already very mature. The admixture is generally used in liquid, which is expensive. There are also powder products that can be used. It is a high-efficiency and stable product!

The specified requirement is not less than 3 minutes, but generally it is still string on the road when the car is running; there will be a stirring effect. Generally, 60s is enough.

Strength shrinkage may be caused by excessive cement content.

You add too much retarder in your additives, you should reduce the amount, and control the setting time between 24-48h

This usually happens later phase. You are using tailing sand, right? The underlying mortar must have burst out.

The additives for wet mixing need to add some carboxylic acid, cellulose ether, air-entraining agent, retarder, and sodium gluconate with white sugar is the best. That’s about all I know.

The sand is too fine so it cracks when applying too thick. Coarser sand will be fine.