00728cam a2200253 4500 sa 68015430 DLC 20260227112643.0 700330s1965 ii ab 00000 eng sa 68015430 //r85 PL480:I-E-10547 TA455.F55 R66 620.1/96 Central Building Research Institute (India) Use of fly ash in building industry. Calcutta, Institute of Engineers (India), 1965. 18 p. illus., map. 25 cm. 2.50 Institution of Engineers (India) Monograph, no. 1 Cover title. Fly ash. Pozzuolanas. Portland cement. 86443 86443