Building Materials' Properties

Building Materials' Properties

1. Mechanical

2. Chemical

3. Phyisical

   • Conditions of the material without any external force
     • Bulk density
       • Divided Solids
       • The mass of many particlesof the material devided by the total volume they occupy
     • Porosity
       • Void fraction, meassure of void spaces in a material, is measured between 0 and 1, or percentage.
         • It is meassured the total amount of void space accesible from surface.
       • Testing
         • Computer Tomography
         • Hydraulic conductivity
           • Ease wiht which fluid can move through pore spaces or fractures
         • Thermal stress, mechanical stress, salt crystalization, or chemical weathering.
     • Durability
       • The ability of a building or any of its components to perform the require functions in a service environment over time.
       • lifetime spam, reliability
     • Density
       • volumetric mass, specific mass
       • mass per unit volume
     • Specific gravity
       • ratio between the density of an object, and a reference substance. This magnitude can tell us if the object will sink or float in a reference substance.
       • will determine if an object floats or not in the water.
     • Fire resistance
       • Is the propertie of materials or their assemblies that prevents or retards the passage of excessive, heat, hot gasses or flames under conditions of use.
       • Fire resistance test: the duration for which a passive protection system can withstnd a standard fire resistance test.
       • Test of resistance of record protection equipment: Class 125 °F for digital information, Class 150°F for film based information and Class 350°F for Paper documents.
     • Frost resistance
     • Weathering resistance
       • Weather can influence the aesthetic and mechanical properties of plastics (materials)
     • Water absortion
     • Water Permeability
     • Hygrocopicity
     • Coefficient of softening
     • Retractoriness
       • resistant to decomposition by heat, preassure or chemical attack. Retens form and strenght at high temperatures.
       • Former definition by ASTM: non-metalic materials having those chemical and physical properties that make them applicable for structures, or as components of systems that are exposed to environments above 1000 °F.

4. Thermal

5. Electrical

6. Sciences related to materials

   • Soil Science - important for engineers
   • Earth Sciences
   • Hydrology
   • Soil Mechanics
   • Packaging
     • Is a science?

7. Buildong materials under the microscope_ Follow the link inside the note

   • https://www.healthyheating.com/Building-Science/Building-materials.htm

8. Vocabullary

   • Stress
   • Microstructue
   • Crack