supply of op works stores for construction material at tawang circle : , cement 43 grade opc packed in hdpe bag each 50 kg wt conforming to is 8112-1989 ( make : birla gold / ambuja / ultratech / acc / jk / dalmia ) , coarse sand free from vegitation , coarse aggregate 20mm graded , coarse aggregate 40mm graded , hard core ( 63 to 90mm ) graded , water proofing compound conforming to is 2645-2003 . make : pidilite / dr fixit / fevicol , mild steel bars of size 6 to 8mm dia conforming to is 432 ( part i ) 1982 ( make : tata / sail / jsw ) , mild steel bars of size 10mm and above dia conforming to is 432 ( part i ) 1982 ( make : tata / sail / jsw ) , m seal 150 gm pkt ( make: pidilite / fevicol / quick fix ) , ms binding wire