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Dry mortar is easy to confuse several concepts
Update time：2017-09-08 00:45:33clicks：2006次Type size：T|T
Dry mortar has been widely used, but in the application process, some production, use and supervision units are confused with some concepts and performance indicators of dry mortar. Today, Xiaobian will analyze the following concepts for you:
1. Viscosity and strength
The higher the viscosity, the higher the strength. Strength usually refers to the physical properties of the mortar after curing, and viscosity usually refers to the state of the mortar after mixing, which is an indicator in the construction process. There is no necessary relationship between viscosity and strength.
2, bond strength and compressive strength
Bond strength refers to the maximum bonding force of mortar acting on the bottom layer. There are two kinds of shear strength and tensile strength. Tensile strength refers to the ability of the mortar surface to resist the vertical force acting on the surface; Shear strength is the strength measured by applying parallel forces.
Compressive strength refers to the maximum value of mortar failure measured by applying pressure, which is generally the cohesive strength of mortar. High bond strength does not necessarily mean high compressive strength, low compressive strength does not necessarily mean low bond strength.
3. Waterproof and water resistant
The concept of waterproof and water resistance is mainly in putty products, water resistance means that the performance of the material does not change greatly in the water environment, and waterproof means that water cannot penetrate. Putty is only a leveling material before painting, and does not have and should not have the properties of waterproof materials. JG158 "Building indoor putty" and building JG157 "Building external wall putty" standards only stipulate the water resistance of putty, the formed putty soaked in water for a certain time to observe whether the putty layer changes. The actual application process some enterprises exaggerate the publicity, saying that they produce waterproof putty, and some use units often ask whether the external wall putty is waterproof.
4. Heat preservation and insulation
Insulation is the ability of masonry wall materials or products to prevent heat loss in winter and keep room temperature stable. It usually refers to the ability of the envelope (including the roof, external walls, doors and Windows, etc.) to prevent heat transfer from the indoor to the outdoor in winter, so that the indoor temperature is maintained. Thermal insulation refers to the ability of masonry wall materials or products to prevent heat from entering in summer and maintain a stable room temperature. Usually refers to the ability of the envelope to isolate the effects of radiant heat from the sun and high outdoor temperatures in the summer, thus keeping its inner surface at an appropriate temperature. The building energy efficiency design code of our country stipulates that the building energy efficiency index is different in different regions.
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1. Viscosity and strength
The higher the viscosity, the higher the strength. Strength usually refers to the physical properties of the mortar after curing, and viscosity usually refers to the state of the mortar after mixing, which is an indicator in the construction process. There is no necessary relationship between viscosity and strength.
2, bond strength and compressive strength
Bond strength refers to the maximum bonding force of mortar acting on the bottom layer. There are two kinds of shear strength and tensile strength. Tensile strength refers to the ability of the mortar surface to resist the vertical force acting on the surface; Shear strength is the strength measured by applying parallel forces.
Compressive strength refers to the maximum value of mortar failure measured by applying pressure, which is generally the cohesive strength of mortar. High bond strength does not necessarily mean high compressive strength, low compressive strength does not necessarily mean low bond strength.
3. Waterproof and water resistant
The concept of waterproof and water resistance is mainly in putty products, water resistance means that the performance of the material does not change greatly in the water environment, and waterproof means that water cannot penetrate. Putty is only a leveling material before painting, and does not have and should not have the properties of waterproof materials. JG158 "Building indoor putty" and building JG157 "Building external wall putty" standards only stipulate the water resistance of putty, the formed putty soaked in water for a certain time to observe whether the putty layer changes. The actual application process some enterprises exaggerate the publicity, saying that they produce waterproof putty, and some use units often ask whether the external wall putty is waterproof.
4. Heat preservation and insulation
Insulation is the ability of masonry wall materials or products to prevent heat loss in winter and keep room temperature stable. It usually refers to the ability of the envelope (including the roof, external walls, doors and Windows, etc.) to prevent heat transfer from the indoor to the outdoor in winter, so that the indoor temperature is maintained. Thermal insulation refers to the ability of masonry wall materials or products to prevent heat from entering in summer and maintain a stable room temperature. Usually refers to the ability of the envelope to isolate the effects of radiant heat from the sun and high outdoor temperatures in the summer, thus keeping its inner surface at an appropriate temperature. The building energy efficiency design code of our country stipulates that the building energy efficiency index is different in different regions.
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