Latta ලොට්ට & Anann මනන්

ශ්‍රී ලංකාවේ සීග්‍ර වර්දනය හමුවේ ඉදිකිරීම කර්මාන්තය ප්‍රදාන ස්තානයක් දිනාගෙන තිබෙන අතර ඉදිකිරීම කර්මාන්තය සදහා අවශ්‍යවන්නාවු මූලික අමුදව්‍යයක් වන කලුගල් ලබා ගැනීම සදහා ගල් පිපිරවීම හෙවත් බෝර ගැසීම සිදුකරනු ලබයි. තවද මහාමාර්ග ඉදිකිරීමේදී මාර්ග සීමාවේ පිහිටි කදු කපා සකසීමේදී එහිදී හමුවන්නාවු කලුගල් ඉවත්කිරීම සදහා ගල් පිපිරවීම ශිදුකරනු ලබයි.  

  Standard Penetration Test The standard Penetration Test (SPT) is a widely used soil exploration tool that involves using a SPT hammer to drive a split barrel sampler at the bottom of a drill string to obtain soil samples. The number of blows required to penetrate the last 12" is the “N value”, which is related to soil strength. Why Measure the Energy Transferred by the SPT Hammer? Several different types of SPT hammers are used to conduct Standard Penetration Tests. Their varying efficiencies influence the “N value”. The measured “N value” is standardized by multiplying it by the ratio of the measured energy transferred to the rod to 60% of the theoretical potential energy. The standardization compensates for the variability of the efficiencies of different SPT hammer types, and improves the reliability of soil strength estimates used in geotechnical applications. N60 is what a safety hammer (cathead and rope) N value is estimated to be uncorrected. An auto hammer is estimated t...

Bearing Capacity of Soil Density of Soil Water Table Self weight of Structure Live Load of Structure Wind Load & Seismic Load (Earthquake) Rankine's Formula Df=Minimam Depth of Foundation p=Bearing Capacity of soil w=density of soil θ=Angle of proposed Soil   Complex    Given data: Load on the foundation ( p ) = 370KN/m 2  Unit weight of soil (w) = 17KN/m 3 The angle of repose of soil (θ )= 35° Now, we will calculate the minimum depth of foundation ( Df )by using Rankine's formula. Where,  Df = [( p ÷ w ) × ( 1- sinθ ÷ 1+sinθ )2]      = [( 370 ÷ 17 ) × ( 1- sin35° ÷ 1+sin35° )2]     = [(21.764 ) × ( 1- 0.5735  ÷ 1+ 0.5735 )2]     = [ 21.764 × ( 0.4265 ÷ 1.5735 )2]     = [ 21.764 × (0.271)2]    = [21.764 × 0.07346]   = 1.598m. The minimum depth of foundation for the above-given data is calculated as 1.598 by using Rankine's formula. In the following table, I have given the angle of re...

WATER QUALITY TEST Concrete Production Test Test Method Unit pH at 22.3 °c ASTM D 1293-99 - Chloride (Cl) Content ASTM D 512-04 mg/L Sulphate (S042-) Content ASTM D 516-07 mg/L Total Suspended Solids (TSS) APHA-2540-D mg/L Total Dissolved Solid (TDS) APHA-2540-C mg/L Carbonate (C032 ) Content USGS - 06 Method mg/L Bicarbonate (HCQ3-) Content USGS - 06 Method mg/L Electrical Conductivity APHA 2510-B µSiem Turbidity USEPA 180.1 NTU Phosphate (as P205) APHA-4500-P-E mg/L Nitrate (as N03} APHA 4500-N03"-B mg/L Humic matter BS EN 1008:2002 -  

REFERENCED SPECIFICATIONS No Test Item Referenced Specification 01 Preparation of Material and Marshal Compaction Asphalt Concrete M ix Design Manual Series No 02 (6 th Edition) 02 Maximum Theoretical Specific Gravity ASTM 02041-78 03 Grading of Course Aggregate ASTM C·136 I/ASTM C-1 17 04 Grading of fine Aggregate ASTM C-136 I ASTM C-1 17 05 Specific Gravity of Aggregate ASTM C-127/C-128 06 Water Abortion of Aggregate ASTM C-127/C-128 07 Specific Gravity of Bitumen AST1'.1 D 70-86 08 Softening Point ASTM D 36-95 09 Pe11etration of Bitumen ASTM D 5-97 10 Flash Point ASTM D 92-96 11 ...