particular specifications (road works) - CIDCO Maharashtra Ltd.

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CIDCO OF MAHARASHTRA LTD C.A.No.01/CIDCO/SE(KHR)/EE(KHR-I)/2010–11 Pg. No. 546 bring as excess of mortar to the surface of the concrete. The top face of a slab intended to be surfaced with other materials shall be left with a spaded finish. Face of concrete intended to be plastered shall be roughened by approved means to form a key. When at site, concrete cube testing machine is used 10% of the cubes should be tested at independent recognized laboratories approved by Engineer at their cost. 1.9 Scope of work & item to include: 1. The item refer to ready mix concreter required for R.C.C./P.C.C. works as mentioned in item description under Schedule –‘A’ procured form reputed manufacturer approved by Engineer. The material shall be conforming to B-7 refer page No.38 for controlled cement concrete. (Standard Specifications of PWD, Vol-I) The material requirement shall be completed according to Standard Specifications No.B.7.1 refer Page No. 38 for controlled cement concrete. 2. The item include manufacturer with ingredients, control temperature, transportation, pumping, placing, vibration and curing of Ready Mix Concrete and all taxed, excise duty, sales tax, octroi, insurance etc. levied by Govt./Semi-Govt./local authority and cost of ready mix concrete and any penalty, additional charges for controlling temperature upto casting or any other charges levied by the manufacturer.
CIDCO OF MAHARASHTRA LTD C.A.No.01/CIDCO/SE(KHR)/EE(KHR-I)/2010–11 Pg. No. 547 3. Proportioning of the mix/mix design shall be decided by the contractor/RMC manufacturer to achiever strength specified in item and shall be get approved by Engineer. The proportioning of ingredients, use of ingredients and mix designs parameters for various slumps shall be got approved by Engineer prior to mix design. 4. Scaffolding shall conform to specifications No. B.6.5(a) and got approved by the Engineer. 5. Forms shall conform to specifications No. B.6.5(b). 6. The concrete shall be pumped to the final positions as quickly as possible by methods which will prevent segregation and loss of ingredients. 7. The concrete shall be placed into its final position, compacted and finished within 30 minutes of mixing the water and before initial setting commences. The method of placing shall be such as to avoid segregation. Placing shall be done in balanced manner to avoid eccentric loads on the form work. As far as possible the concreting shall be done continuously and construction joints avoided. If the area to be concreted is under water, the water shall be removed by bailing out or using pumps and other devices. 8. Compaction shall be done by mechanical vibrators and also by rods so that a dense concrete is obtained.
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particular specifications (road works) - CIDCO Maharashtra Ltd.

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