1. RCC (1:1.5:3) for slabs, beams, lintels and staircase:

Proportion- The proportion of cement concrete shall be of one part of cement, two parts of sand four parts of aggregates by volume.

Cement- The cement shall be used in this work shall comply with the standard requirements. Fine Aggregate-The sand to be used shall be clean and coarse and shall be free from any organic or vegetable matter. The sand shall be washed, if there is any trace of earth in it.

Coarse Aggregate- The coarse aggregate shall consist of 67% of black trap metal carrying in size from 20mm to 40mm and 33% of black trap metal carrying in size from 20mm to 6mm. The coarse aggregate for the concrete work shall be clean and free from impurities such as earth, coal dust and other organic materials. The unclean aggregates shall have to be screened and washed before use.

Water- The water to be used in concrete work shall be clean and fresh.

Reinforcement- All reinforcement shall be of steel which shall comply with the standard requirements. All bars shall be placed as per design given by the engineer and utmost care shall be taken to keep them in the same position while packing concrete around them. Before laying the concrete, the reinforcement shall be got approved by the engineer.

Centering- The centering for the concrete work shall be sufficiently strong and rigid and in good condition so as to turn out a good smooth surface. The props to be used for centering shall be of timber bullies. The spacing of bullies shall not be more than 120cm centre to centre. The bullies shall be supported at the base on 40mm thick wooden plate having area not less than 0.10sq m.

The surface of formwork shall be oiled before placing of concrete.

Mixing- The mixing of concrete shall be done in a mechanical mixer or by hand operations depending on the quantity of the concrete which shall be decided by the engineer. In the former case, the mixing drum shall be turned at least for 1.5 minutes after all the ingredients are added and the drum shall be completely emptied every time. The concrete from the drum shall be placed on a water tight platform.

Laying and Curing- Before start laying of concrete in position; the centering shall be well watered. The concrete shall be laid in forms and tapped in such a way that no honeycomb surface appears on removal of the forms. The cement concrete shall be kept well watered for at least 20 days.

Finishing of Exposed surface- All exposed surfaces of the concrete work shall be finished with 12mm thick cement plaster of sagol finish and three coats of white or colour was shall be applied on these exposed surfaces of concrete.

2. 20mm thick external plaster in CM (1:4)

Preliminary- The work of sand faced cement plaster shall be carried out after masonry joints are raked out to a depth of 20 mm and the walls are well watered.

Procedure for First Coat- The first coat for sand faced cement plaster shall be of cement mortar in proportion 1:4 one part of cement to four part of clean, coarse and angular river sand by volume. The mortar of one cement bag shall only be prepared at a time and it shall be prepared on a water tight platform or in a steel trough. The mortar shall be consumed within 30 minutes after adding water. The first coat of plaster shall be uniformly applied in the best workmanship manner after watering the surface of walls in advance and putting dots and preparing screeds for maintaining uniform thickness of plastered surface. The thickness of first coat shall be nowhere less than 12 mm, the first coat shall be well watered at least for 7 days. The first coat shall be provided with zigzag lines such that the first coat adheres well with the second coat.

Procedure for Second coat- The second coat of sand faced cement plaster shall be carried out in CM of proportion 1:1 and shall be of thickness 8mm. The second coat shall be applied on the first coat at least after 7 days of completion of first coat. The second court shall give uniform grey colour to the whole structure or any other colour approved by the engineer. The sand to be used in the mortar for the second coat shall be perfectly screened so that sand of uniform size shall appear on the surface. The sponge shall be used in the second coat and it shall be applied when the second coat is wet and it shall be so worked that the density of the sand grains appearing on the surface shall be equal and uniform. After completion of the second coat, the surface shall be kept well watered at least for 15 days

Measurement- The payment shall be made for superficial are covered.