Structure Classification Structure Class Consequences Acceptability of ASR Structure/Asset T ype Sections S1 Safety and future maintenance consequences small or negligible Some deterioration from ASR may be tolerated Temporary structures. Inside buildings. Structures or assets that will never be exposed to water 620, 621, 624, 627, 628 643, 644, 859, 874, 930, 932, 934, 952, 953, and 1005 S2 Some minor safety, future maintenance consequences if major deterioration were to occur Moderate risk of ASR acceptable Sidewalks, curbs and gutters, inlet tops, concrete barrier and parapet. Typically structures with service lives of less than 40 years 303, 501, 505, 506, 516, 518, 523, 524, 525, 528, 540, 545, 605,607, 615, 618, 623, 630, 633, 640, 641, 658, 667, 673, 674, 675, 676, 678, 714, 852, 875, 910, 948, 951, 1001, 1025, 1040, 1042, 1043, 1086, 1201, 1210, 1230, and Miscellaneous Precast Concrete S3 Significant safety and future maintenance or replacement consequences if major deterioration were to occur Minimal risk of ASR acceptable All other structures. Service lives of 40 to 75 years anticipated. 530, 1001, 1006, 1031, 1032, 1040, 1080, 1085, 1107, MSE walls, Concrete Bridge components , and Arch Structures
2.c Minimum Levels of Supplementary Cementitious Materials (SCM) based on Level of Prevention . Utilize a minimum mass replacement level from Table G below.
Table G Minimum Replacement Level of SCM (percentage by mass of cementitious material (12)) Type of SCM(1) Alkali Level of SCM (% Na2Oe) (2), (3) Level V (4) Level W Level X Level Y Level Z (5), (11) Class F or C flyash(6) ≤ 3.0 – 15 20 25 35 Class F or C flyash(6) >3.0 to ≤ 4.5 – 20 25 30 40 Slag Cement ≤ 1.0 – 25 35 50 65 Silica Fume(7), (8), (9), (10) ≤ 1.0 – 1.2 x LBA 1.5 x LBA 1.8 x LBA 2.4 x LBA Notes:
and a SCM .
replacement levels given in Table G for the individual SCMs may be reduced provided the sum of the parts of each SCM is greater than or equal to one. For exampl e, if silica fume and slag are used together, the silica fume level may be reduced to one- third of the minimum silica fume level given in the table provided the slag level is at least two -thirds of the minimum slag level required.
530.