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Dry pack mortar, which is also called deck mud or floor mud, is a mixture of sand, cement, and water. It is used to repair small spots, creating thick bed mortar for tile and brick placement, and bed shower installation.
The proportion of the mixture is one part of cement to four part of sand, and adequate water to produce mortar that stick together when it is molded into a ball with hands as illustrated in Fig.1.
Added to that, the ball shall not crumble as a result of low water and should not slump due to high-water proportion. This mixture is claimed to yield a compressive strength of 21 MPa.
Fig. 1: Adequate Amount of Water AddedDry Pack Mortar - Applications and Advantages
Mixture Proportion
It is reported that one part of cement to four part of sand, preferably sharp clean sand, is adequate. However, mix proportions like one to two and half, and one to five or even six are reported.
With regard to quantity of water, it depends on the moisture content of used sand. if moisture of sand is low, greater quantity of water would be needed compare with case where moisture content is high.
Fig. 2: Dry Pack Mortar Before Adding WaterFig. 3: Dry Pack Mortar Ready for UtilizationApplications of Dry Pack Mortar
Advantages of Dry Pack Mortar
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