- The ① base treatment is not clean, such as the dust and loose objects. Release agent and oil stains attached to the base surface, etc. These debris are not completely and clean will affect the bonding of the plastering layer and the base layer.Ash mortar
- ② has dents or once plastering is too thick. Before the mortar dries, the mortar layer has from the base due to the action of gravity.
- The ③ interface treatment is improper or no interface treatment, the base surface is too smooth. Can not inhibit the dry shrinkage of the mortar, resulting in the mortar layer separated from the base. Before plastering, the base should be . And start to water the wall 2-3 days in advance, the water seepage depth of 10 mm before the construction. There are deep concave places, the mortar should be in advance. In addition, the interface mortar should be in advance.Ash mortar
Mainly due to the bottom ash layer is overdry. In addition to the construction in addition to the requirements of the specification, if found that the bottom layer has been dry, should be wet water, after the bottom layer wet after the surface layer.
The main reason is that the plastering layer is too thick and takes no anti-crack measures or the cracking caused by the empty drum. If the plastering surface is very thick, the bottom layer should be filled in the construction, or the bottom ash is sprayed with anti-crack agent for treatment. Cement plastering mortar appears in the above situation, should be reworked and repaired, repair, the layer, empty drum, burst ash and crack part will be removed clean, and then according to the standard requirements of the local plastering.