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HINDUSTAN PETROLEUM CORPORATION LIMITED MUMBAI REFINERY DHT PROJECT – OSBL FACILITIES

TITLE : SPECIFICATIONS FOR PLUM CONCRETE & PLUM MASONARY

DOCUMENT NO. : 44LK- 5100-00/A.02/1125/A4

Rev No.

A

Issue Date

25/10/2008

Pages

3

Rev Description

ISSUED FOR TENDER

Prepared

Checked

Approved

By

By

By

DK

SSP

MBR

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Jacobs Pages 2 of 3

Specification for Plum Concrete & Plum Masonary Standard Specification Doc.no.44LK-5100-00/A.02/1125/A4

HPCL, Mumbai 44LK5100

TABLE OF CONTENTS

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PLUM CONCRETE & PLUM MASONRY

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Jacobs HPCL, Mumbai 44LK5100

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Specification for Plum Concrete & Plum Masonary Standard Specification Doc.no.44LK-5100-00/A.02/1125/A4

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PLUM CONCRETE AND PLUM MASONRY:The proportion of plums should not exceed 50 per cent of total volume of plum concrete /plum masonry. The stone size to be used for plum shall be between 200 to 300 mm. The stone shall be basalt ,trap or any other approved locally available stone with minimum crushing strength of 100 kg/sq.cm obtained from quarries approved by Engineering -in-charge. The stone shall be hard durable and tough .The length of stone shall not exceed 3 time its height. it will be sufficient to make up the total volume with plums and fill all the interstices, which should not be less than 150cm, with cement concrete. The cement concrete shall be in 1:4:8 (cement, sand, coarse aggregate). The coarse aggregate shall be 25 mm down. The water cement ratio shall be adjusted at site to maintain the flowability of concrete to fill all the interstices properly. The plums are laid in layers using the cement concrete as mortar. The plum shall be raised uniformly, and no part, at any time shall be raised more than 900 mm above ading work. Double scaffolding shall be provided for construction and piercing of walls for scaffolding shall not be permitted. The or shall be responsible for any damage or injury resulting from poor scaffolding. All plum concrete/ plum masonry shall be maintained wet for at least 7 days Weep holes shall be provided by HDPE pipes buried in plum masonry. The end of the weep holes ,on the filled up side, shall be covered by geo-membrane and filled by gravels of sizes 40 mm. Form work shall be of ply wood or steel .

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