tender for comprehensive br maintenance works at otm accn at lansdowne. - tender for comprehensive br maintenance works at otm accn at lansdowne. - old unsv bricks any description - demolition of unreinforced cement concrete in floors and pavings n. exc 15 cm thickness below or above ground level, complete all as specified and directed. material and labour for 75 mm thick cement concrete 1:4:8 type d-2 using 40mm graded stone aggregate as in sub base complete all as specified and directed. m & l cement concrete 100mm thick type b-2, 1:2:4 (40mm graded aggregate) as in path/hardstanding complete all as specified and directed. spike rolling to surfaces or making impressions of expanded metal, while the concrete is green all as specified and directed. forming 12 mm thick expansion for 100 mm thick concrete joints filled with pre-formed bituminous filler and top 30mm primed and sealed with sealing compound, grade b complete all as specified and directed.