(1) Application of mortar mix ratio by weight, measurement accuracy, cement ± 2%, sand and admixtures ± 5%.

(2) is appropriate mechanical mixing, feeding order of sand - cement - admixture - water, stirring time less than 1.5min.

(3) along with the mortar should be used, mixing cement or cement mortar generally exhausted after mixing 3 ~ 4h prohibited by overnight mortar.

(4) various intensities for each floor or level 250m3 masonry mortar, each mixer should be at least one set of test block.