按水泥：砂=1:3左右的配比配制砂灰，充分拌匀砂灰后，然后加15%左右水搅拌配制半干湿水泥砂浆。均匀混合，以" 手握成形，手颠即散" 为标准，半潮半干状态。
Treatment of artificial stone ground base course: it shall be treated on the base course with determined elevation and artificial stone paving level.
Clean up the laitance, oil stain, coating, protrusion and other substances affecting the bonding strength on the base course;
Interface treatment: the binder slurry or plain cement slurry with water cement ratio of 1:1 can also be sprayed on the base course, or the ground consolidation independently developed by the R & D center can be used, but there shall be no ponding. If there is ponding, sweep it away.
Cement mortar (as semi dry wet leveling layer)
Cement: Ordinary portland cement or slag Portland cement above grade 32.5;
(low alkali) sand: coarse sand or medium sand, with mud content no more than 3%, passing through the screen with 8mm aperture;
Prepare sand ash according to the ratio of cement: sand = about 1:3. After fully mixing the sand ash, add about 15% water to mix and prepare semi dry and wet cement mortar. Mix evenly, taking "shape by hand, scatter by hand" as the standard, in a semi