1, sintered clay brick has strong water absorption ability in dry state because there are many capillaries. If you don't water it when using it, the moisture in the masonry mortar will be absorbed by the bricks quickly, which will reduce the workability of the mortar and make it difficult to spread it during operation.

2. Because part of the moisture in the mortar is absorbed by the brick, it will lead to early dehydration, but it can't hydrate well, thus weakening the bonding force between brick and mortar, greatly reducing the compressive and shear strength of mortar and masonry, and affecting the integrity and seismic performance of masonry.

3. In order to facilitate the operation, make the mortar have a suitable environment for hardening and strength growth, and ensure the masonry quality, the brick must be watered and wetted before use.

Extended data

1, construction operation process mortar mixing?

2. Brick watering Clay bricks must be watered and wetted the day before laying. Generally speaking, it is appropriate for water to invade all sides of brick 1.5cm, and the water content 10%~ 15%. Dry bricks shall not be used to build walls at room temperature; Brick walls saturated with water content shall not be used in rainy season.

3, mortar mixing mortar mixture ratio should use weight ratio, the measurement accuracy of cement is plus or minus 2%, sand, gypsum control within plus or minus 5%, appropriate uses mechanical mixing, mixing time is not less than 65 plus or minus 65±0.5min.

Bricklaying: Bricklaying should adopt the "trinity" bricklaying method, that is, the full spread and extrusion operation method. Bricks should be leveled when laying bricks. If the hand is high, the wall will open; If the hand is low inside, the wall will be backed. Bricklaying must follow the line, "the top line, the bottom edge, and the left and right neighbors should be flat."

The thickness of horizontal mortar joint and the width of vertical mortar joint are generally 10mm, but should not be less than 8mm and not more than 12 mm ... In order to ensure that the main joint of the wall is vertical, no wandering joint is allowed. When the frame height is completed, it is advisable to play two vertical vertical lines at the position of vertical brick, and the wandering joint can be controlled by sections.

In the process of operation, self-inspection should be carried out seriously. If there is any deviation, it should be corrected at any time. It is forbidden to hit the wall afterwards. Masonry mortar should be used with mixing. Generally, cement mortar must be used up within 3h, and cement mixed mortar must be used up within 4h. Overnight mortar is not allowed.

Refer to Baidu Encyclopedia-Key Points of Masonry Construction