- Apr 23, 2018 -
According to the constituent materials, ordinary mortar can also be divided into: 1 lime mortar. By lime paste, sand and water made by a certain ratio, generally used for low strength requirements, from the wet masonry and plastering layer; 2 cement mortar. Made of cement, sand and water according to a certain ratio, generally used for masonry, walls or floors in wet environments or in water; 3 mixed mortar. In cement or lime mortar mixed with appropriate admixtures such as fly ash, diatomaceous earth and other made to save the amount of cement or lime, and to improve the workability of the mortar. The commonly used mixed mortars include cement lime mortar, cement clay mortar and lime clay mortar.
The new ordinary 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 it is generally determined based on construction experience or determined by tests. The compressive strength of the mortar is indicated by the mortar number. Commonly used ordinary mortar numbers are 4, 10, 25, 50, 100, etc. For masonry with high strength and important requirements, it is necessary to use 100 or more mortar. The adhesive strength of mortar increases with its labeling, and also relates to the surface state of the masonry, whether it is clean or not, the degree of moisture, and conditions for construction and maintenance. Therefore, bricks are generally wetted before bricklaying to enhance the bond between bricks and mortar and ensure the quality of masonry.
The difference between building mortar and concrete is that it does not contain coarse aggregate. It is prepared from cementitious materials, fine aggregate, and water in a certain proportion. According to its purpose, it can be divided into masonry mortar and plastering mortar; according to different materials, it can be 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 project quality.
Divided according to different purposes: masonry mortar, plastering mortar (including decorative mortar, waterproof mortar), adhesive mortar and so on.