First, the workability of fresh mortar The workability of mortar refers to whether the mortar is easily laid on a surface such as masonry, and has a uniform and continuous thin layer and is closely bonded to the base layer. It includes both liquidity and water retention. (1) Liquidity Factors affecting the fluidity of mortar, mainly the type and amount of cementitious materials, water consumption and types of fine aggregates, particles The shape, thickness and gradation are also related to the type and amount of the mixed materials and admixtures. Usually, the substrate is a porous water-absorbing material, or when it is applied under dry heat conditions, a mortar with a large fluidity should be selected. On the contrary, if the substrate has less water absorption or is applied under wet and cold conditions, a mortar with a small fluidity should be selected. (2) Water retention Water retention refers to the ability of the mortar to retain moisture. Mortar with poor water retention, bleeding during use, slurry, sand The slurry and the substrate are not firmly bonded, and the normal adhesion and hardening of the mortar due to the loss of water reduces the strength of the mortar. The main factors affecting the water retention of mortar are the type and amount of cementing material, the variety, fineness and water consumption of sand. Incorporating a powdery mixed material such as lime paste or fly ash into the mortar can improve the water retention of the mortar. Second, the strength of hardened mortar The factors affecting the strength of the mortar are: When the quality of the raw material is constant, the strength of the mortar depends mainly on the cement number and the amount of cement. In addition, mortar strength is also related to sand, admixtures, blended materials, and masonry and curing conditions. When the amount of mud and other impurities in the sand is high, the mortar strength is also affected. Light-Duty Patent Series,Pu Caster,Light-Duty Wheel,Furniture Swivel Caster BENYU CASTERS & WHEELS CO.,LTD , https://www.benyucaster.com