According to the composition materials, ordinary mortar can also be divided into: 1 lime mortar. Made of lime paste, sand and water in a certain ratio, generally used for masonry and plastering layers with low strength requirements and no moisture; 2 cement mortar. Made of cement, sand and water in a certain ratio, generally used in masonry, wall or floor in humid environment or water; 3 mixed mortar. It is made by adding appropriate admixture such as fly ash or diatomaceous earth to cement or lime mortar to save the amount of cement or lime and improve the workability of the mortar. Commonly used mixed mortars include cement lime mortar, cement clay mortar and lime clay mortar.
The fresh common mortar should have good workability, and the hardened mortar should have the required strength and adhesion. The workability of mortar is related to its fluidity and water retention, and is generally determined by construction experience or determined by experiment. The compressive strength of the mortar is indicated by the mortar mark, and the commonly used ordinary mortar is labeled 4, 10, 25, 50, 100, and the like. For masonry with high strength and importance, it is necessary to use mortar of No. 100 or above. The adhesion of the mortar increases with the increase of the number of the mortar, and is also related to the surface state of the masonry, the cleaning, the degree of moisture, and the construction and maintenance conditions. Therefore, it is generally necessary to wet the bricks before bricklaying to enhance the adhesion between the bricks and the mortar to ensure the quality of the masonry.
The difference between construction mortar and concrete is that it does not contain coarse aggregate. It is prepared from cementitious materials, fine aggregates and water in a certain proportion. According to its use, it is divided into masonry mortar and plastering mortar; according to the materials used, it is divided into cement mortar, lime mortar, gypsum mortar and cement-lime mixed mortar. Reasonable use of mortar plays an important role in saving cementitious materials, facilitating construction and improving engineering quality.
Divided into different types according to the use: masonry mortar, plastering mortar (including decorative mortar, waterproof mortar).
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