How to mix the bricklaying mortar In masonry, the mortar is mixed to join each unit in the wall. The overall quality is to have a mix with good consistency. This allows blocks to sit correctly in each course of the wall. The mortars composed of ordinary portland cement, lime and sand. This material must be of good quality to avoid staining the bricks during and after construction. This allows a wall mortars sustainable properties with good weather after construction.
The brick mortar should not contain impurities in the sand. What are acids and other organic matter in the sand. The sand must be tested with a glass of water. After leaving the water and sand to mix in the glass, the level of silt is checked. this should not exceed two millimeters. The water used must be clear of any dissolved salts. This causes the white wall of substances and salts out of the water like efflorescence. All water used must be of drinking water.
The mortar used in brick laying should be used within forty five minutes of mixing. This should be mixed in the proportion of one part cement, one part lime and six parts sand. Lime can be added in the ratio of two parts of lime to eight parts of sand. The mortar should be mixed dry mixed three times before adding water. It is important not to pour water used for mortar. Excessive water is not recommended as it fled with cement or lime. When water flows over the sides of brick, are left to dry, which are difficult to clean.
The proportion of lime in the mortar must remain low. This is because it causes slow-setting mortar, the considerable shrinkage and low strength. However, it can be used for craft training or schools offering courses in building. It can be used to sample the walls, because they can be easily demolished. Mortars for exterior work should be carefully mixed to allow moisture escape to prevent efflorescence or discoloration. The mortar mix for brick can be used for general works of wall with clay products.
Posted on September 2, 2010.
