Properties Of Construction Materials | Assignment
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Added on 2020-02-05
Properties Of Construction Materials | Assignment
Added on 2020-02-05
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1.1 Describe the properties of construction materialsPhysical propertiesDensity (p) is the mass of a unit volume of homogeneous materialBulk Density (pb) is the mass of a unit volume of material in its natural state (with pores and voids)Specific Weight (y) also known as the unit weight) is the weight per unit volume of materialSpecific Gravity (Gs) of solid particles of a material is the ratio of weight/mass of a given volume of solids to the weight / mass of an equal volume of water at 4°C. S.K Duggal Building Material 3rd edition, New age International (p) Limited, PublishersTrue or absolute specific gravity (Ga) if both the permeable and impermeable voids are excluded to determine the true volume of solids, the specific gravity is called true or absolute specific gravity. Apparent or mass specific gravity (Gm) is the ratio of mass density of fine grained material to the mass density of water. S.K Duggal Building Material 3rd edition, New age International (p) Limited, PublishersPorosity (n) is the degree to which volume of the material of the material is intermixed with pores S.K Duggal Building Material 3rd edition, New age International (p) Limited, PublishersVoid Ratio (e) is defined as the ratio of volume of voids to the volume of solids. S.K Duggal Building Material 3rd edition, New age International (p) Limited, PublishersHygroscopicity is the property of a material to absorb water vapour from air. S.K Duggal Building Material 3rd edition, New age International (p) Limited, PublishersWeathering Resistance is the ability of a material to endure alternate wet and dry conditions fora long period without considerable deformation and loss of mechanical strength. Water Permeability is the capacity of a material to allow water to penetrate under pressure. Materials like glass, steel and bitumen are impervious.
Frost Resistance is the ability of a water-saturated material to endure repeated freezing and thawing with considerable decrease of mechanical strength S.K Duggal Building Material 3rd edition, New age International (p) Limited, PublishersHeat Conductivity is the ability of a material to manage or control heat.Thermal Capacity is the property of a material to absorb heat described by its specific heat. S.K Duggal Building Material 3rd edition, New age International (p) Limited, PublishersFire Resistance is the ability of a material to resist the action of high temperature without any substantial deformation and substantial loss of strength. S.K Duggal Building Material 3rd edition, New age International (p) Limited, PublishersRefractoriness denotes the ability of a material to withstand prolonged action of high temperature without melting or losing shape. S.K Duggal Building Material 3rd edition, New age International (p) Limited, PublishersHigh-melting materials can withstand temperature from 1350–1580°C, whereas low-melting materials withstand temperature below 1350°C.Chemical Resistance is the ability of a material to withstand the action of acids, alkalis, sea water and gases. S.K Duggal Building Material 3rd edition, New age International (p) Limited, PublishersDurability is the ability of a material to resist the combined effects of atmospheric and other factors.Mechanical propertiesStrength is the ability of the material to resist failure under the action of stresses caused by loads, the most common being compression, tension, bending and impact. S.K Duggal Building Material 3rd edition, New age International (p) Limited, PublishersHardness is the ability of a material to resist penetration by a harder body.Elasticity is the ability of a material to restore its initial form and dimensions after the load is removed.
Plasticity is the ability of a material to change its shape under load without cracking and to retain this shape after the load is removed. S.K Duggal Building Material 3rd edition, New age International (p) Limited, PublishersAdvantages of using local stonesEcological in natureEnvironmental FriendlyAvailable in wide rangeLong lasting life3-D effectReasonably priced. www.slideshare.net/orvitiles/article-orvi-aug-18-edited, 5 Oct, 2016The alternatives of local stones are:Quartzgranite1.2 evaluate the properties and uses of construction materialsHeat insulatorsThermal insulation is the reduction of heat transfer (the transfer of thermal energy between objects of differing temperature) between objects in thermal contact or in range of radiative influence.Factors influencing insulation performanceThermal conductivitySurface emissivityInsulation thicknessDensitySpecific heat capacityThermal bridgingWays to insulate
Condensation in kitchens and bathroomsBedrooms and living rooms with two external wallsCold floors above basements. Frank P. Incopera; David P. De Witt (1990). Fundamentalsof heat and mass transfer, 3rd ed. John Wiley and sons, pp 100 – 103 Materials for insulationFibreglassMineral WoolCellulosePolyurethane FoamPolystyrene. http://www.thermaxxjackets.com/5-most-common-thermal-insulation-materials/ 5 Oct 2016Weather-proofing a houseInstall storm windows correctlyAdd honeycomb cellular shadesAdd honeycomb cellular shadesGet a water heater insulating blanketAdd attic or basement insulationGet a programmable thermostatWeather-strip the house. http://www.greenoptimistic.com/weather-proof-home windows/#.V_XoB-ArJQI 5 Oct 20161.3 justify the specification of construction materials regarding their performance in useConstruction SpecificationsAggregates (also referred to as gravel) are used for many different construction applications.In building construction, they are typically used as subbase support under concrete slabs, foundation and underground drainage, fill around pipes, and as one of the three basic concrete ingredients. Aggregates start out as solid rock in the earth’s crust, and over many thousands of years, are broken down by freeze/thaw cycles and other natural action into pieces of various sizes. The larger pieces are called coarse aggregates or gravel; the smaller pieces are usually
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