The approvalshall be obtained from the engineer-in-chargein writingwellbefore the procurementaction by the agency. SPECIFICATIONS FOR INTERLOCKING CONCRETE BLOCKPAVEMENTДЎ.0 The interioclOng concrete blocks for the pavement shall be procured of the approved shape, size and colour from the reputed manufacturers having facilitiesof productionof design mix concrete, vibro-compactingmachineof required specification and well established laboratory for conducting the required tests. All CEs/DDA, for information and for circulation SEs& EEs. PS to EM, DDA for information of the latter. OSD to VC, DDA for kind information of the latter. The same have been drafted/compiled and sent herewith for incorporating in future NITs and quality control tests etc.may be followed meticulously.Д¬HIEF ENGINEER (QC)1. for incorporating the same in future NITs and getting the work executed accordingly. Further, in order to avoid contractual problems EM, DDA desired to compile specification for interlocking concrete block pavements and test procedure etc. 'Guidelines for the use of interlocking concrete block pavements'has been published by Indian Roads Congress which can be referred by the Field/Planning Units for reference and guidance. Now, IRC Special Publication 63-2004 i.e. Technical Sanctioning Authority also do not have standard practice for design of such pavements, as, so far, no app.'oved guidelines/ codes were in vogue. Thus in the absence of any specification on paver blocks, the contractual disputes can't be ruled out. It has been observed that paver blocks pavements are being provided in large number of works in DDA but no relevant specification/codes regarding the quality of paver blocks and laying of paver blocks are incorporated in the Agreements. !DELHI DEVELOPMENT AUTHORITY QUALITY CONTROL CELLД®E (QC) (3)/DDA/Circular/2004/ f 1 CIRCULAR NO 151

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