Civil Engineering

DIMENSIONS - Dimensions shall be measured to nearest 0·01 m except for the thickness of slab which shall be measured to nearest 0·005 m. Areas shall be worked out to nearest 0·01 square metre.   Cubic contents shall be worked out to nearest 0·01 cubic metre. STAGE OF MEASUREMENT- Work shall be measured under the following categories in convenient stages stating the height or depth:  Below ground/datum level.  Aboveground/datum level.  NOTE- The ground/datum level shall be dcfined in each case. CEMENT CONCRETE WORKS Concrete works shall be measured under the following categories.  Works in plain/reinforced/prestressed concrete shall each be measured  separately.  Works in precast and cast in situ concrete shall be kept separate. Unit of Measurement-Unless otherwise stated all concrete work shall be measured in cubic metres. DEDUCTION- No deduction shall be made for the following- Ends of dissimilar materials for example, beams, posts, girders...

COAL TAR EPOXY COATING- Coal tar epoxy coating is a heavy-duty protective polymer that blends epoxy resins with coal tar pitch to form a tough, black, high-solids coating for steel and concrete surfaces. It is prized for its exceptional resistance to corrosion, chemicals, abrasion, and water, making it ideal for use in extremely corrosive and submerged environments like underground pipelines, sewage treatment plants, and marine infrastructure COMPOSITION OF COAL TAR EPOXY Field of Application - Corrosion resistant coating for concrete and metal structures such as:  • Crude oil storage tanks / underground structures  • Dams, Barrage gates, Penstocks.  • Foundation walls and sumps.  • sewage treatment plant, underground pipelines  • Splash zones in docks & harbors Application Methodology  -  Surface Preparation   • Steel: blast cleaned to ISO-Sa21/2 and remove dust, flakes, oil, grease or other loose foreign particles. • In case of new concrete,...

   👉 GROUTS SPECIFIED ARE OF THREE TYPES : ➤ TYPE G1:  A PROPRIETARY NON-SHRINK CEMENTITIOUS, NON-METALLIC, NON CORROSIVE GROUT WITH MINIMUM CUBE CRUSHING STRENGTH OF 40 N/mm2 AT 28 DAYS, WHICH SHALL BE INSTALLED IN ACCORDANCE WITH THE MANUFACTURER'S WRITTEN INSTRUCTIONS. THIS TYPE OF GROUT SHALL BE USED FOR MAJOR STEEL STRUCTURES AND  STATIONARY EQUIPMENT. ➤ TYPE G2: A PROPRIETARY EPOXY GROUT WHICH SHALL BE MIXED AND INSTALLED IN ACCORDANCE WITH THE MANUFACTURER'S WRITTEN INSTRUCTIONS.  THIS TYPE OF GROUT SHALL BE USED FOR ALL MACHINERY,PUMPS AND RECIPROCATING MACHINES.  IT SHOULD HAVE MINIMUM COMPRESSIVE STRENGTH OF 85N/mm² AT 7 DAYS. ➤ TYPE G3: SAND-CEMENT GROUT. CEMENT SHALL BE ORDINARY PORTLAND CEMENT IN ACCORDANCE WITH IS 8112 / IS 12269 AS APPLICABLE. SAND SHALL MEET THE REQUIREMENTS FOR FINE AGGREGATE AS SPECIFIED IN IS 383.  THE SAND-CEMENT MIX SHALL BE SUCH THAT THE COMPRESSIVE STRENGTH OF THE GROUT SHALL NOT BE LESS THAN 14N/...