GAIL (India) Limited

32The joint filler shall be easily and uniformly compressible to its original thickness, tampable, easily cut orsawn, robust, durable, resistant to decay due to termite or weathering, unaffected by water and free of anyconstituent which will bleed into or stain the concrete.The joint filler shall be of same thickness of the joint width, it shall extend through the full thickness ofthe concrete unless otherwise specified and shall be sufficiently rigid during handling and placing topermit the formation of straight joints3.32.3 JOINT SEALING COMPOUNDSJoints sealing compounds shall seal joints in concrete against the passage of water prevent the ingress ofgrit or other foreign material and protect the joint filler. The compound shall have good extensibility andadhesion to concrete shall have good extensibility and adhesion to concrete surfaces and shall haveresistant to flow and weathering. Polysulphide joints where specified on the drawings shall be seated withpolysulphide liquid polymer, stored, mixed handled, applied and cured strictly in dimensions, thoroughlycleaned and treated with recommended primer strictly in accordance with the manufacturer’s writteninstructions prior to sealing. The Contractor shall use only competent personnel experienced in theapplication of polysulphide for such work.Where specified in the drawings, rubber/bituminous based sealant shall be of an approved manufacturer.The treatment of the joint and the use of sealing compound shall be strictly in accordance with themanufacturer’s written instructions.3.32.4 WATER BARSWhere water bars are shown on the drawings, the joints shall incorporate an approved PVC external typewater-bar complete with all necessary molded or prefabricated intersection pieces assembled inaccordance with the drawings with bends and butt joints in running lengths made by heat welding in anelectrically heated jig.Jointing and fixing of water-bars shall be carried out strictly in accordance with the manufacturers writteninstructions.The water-bars shall be installed so that they are securely held in their correct position during the placingand compacting of the concrete.Where reinforcement is present adjacent to water-bars, adequate clearance shall be left between thereinforcement and water-beds to facilitate of the concrete.3.33 CRACKSIf any cracks develop in the reinforced cement concrete construction which in the opinion of theConsultant may be determined to the strength of the construction, the contractor at his own expense shalltest the structural element in question If under these test loads the cracks shall develop further thecontractor at his own expense shall dismantle the construction, cart away the debris, replace theconstruction and carry out all consequential work there to at no extra cost.If the cracks are not detrimental to the stability of the construction in the opinion of the Consultant, thecontractor at his own expense shall grout the cracks with pneumatically applied mortar. At his ownexpense and risk he shall also make good all other building works such as plaster, molding, surface finishof floods, roofs, ceiling etc. which in the opinion of the Consultant have suffered damage either inappearance or stability owing to such cracks.The repair work shall be carried out to the satisfaction of the Consultant/Engineer-in-charge. The decisionof the Consultant/Engineer-in-charge as to the extent of the liability of the contractor in the above mattershall be final and binding on the contractor.