IS 269 : 1989

Zndian Standard

( Reaffirmed 1998 )

ORDINARYPORTLANDCEMENT,33GRADESPECIFICATION
( Fourth Revision )

Second Reprint JULY 1993

UDC

666

l

942

@ BIS 1990

BUREAU
MANAK

OF
BHAVAN, 9

INDIAN
BAHADUR NEW DELHI

STANDARDS
SHAH 110002 Price Group 4 ZAFAR MARG

January 1990

Cement and Concrete Sectional Committee, CED 2

FOREWORD This Indian Standard ( Fourth Revision ) was adopted by the Bureau of Indian Standards on 20 June 1989, after the draft finalized by the Cement and Concrete Sectional Committee had been approved by the Civil Engineering Division Council. This standard was first published in 1951 and subsequently revised in 1958, 1967 and 1976. This fourth revision incorporates the experience gained with the use of this specification and brings the standard in line with the present practices followed in the production and testing of cement. Since the third revision of this standard was published, a large number of amendments have been issued from time to time in order to modify various requirements based on experience gained with the use of the standard and the requirements of the users, and also keeping in view the raw materials and fuels available in the country for the manufacture of cement. The important amendments include increase in insoluble residue from 2 to 4 percent, incorporating 33 MPa as the 28-day compressive strength, making autoclave soundness test compulsory irrespective of magnesia content, incorporating a provision for retest in respect of autoclave soundness test after aeration of. the cement, incorporating a clause on false set and permitting packaging of cement in 25-kg bags. In view of these large number of amendments, the Sectional Committee decided to bring out this fourth revision of the standard incorporating all these amendments so as to make it more convenient for the users. The