10-52 Table 1024 -2
PHYSICAL PROPERTIES OF WATER Property Requirement Test Method Compressive Strength, minimum percent of control at 3 and 7 days 90% ASTM C1602 Time of set, deviation from control From 1:00 hr. earlier to 1:30 hr. later ASTM C1602 Chloride Ion Content, Max. 250 ppm ASTM D512 * Total Solids Content (Residue), Max. 1,000 ppm SM 2540B * Resistivity, Min. 0.500 kohm -cm ASTM D1125 * * Denotes an alternate method is acceptable. Test method used shall be referenced in the test report. 1024 -5 FLY ASH Provide fly ash that meets ASTM C618 for Class F or Class C, except ensure that the loss on ignition does not exceed 4%. Use fly ash that meets the optional physical requirements for uniformity shown in Table 3 of ASTM C618. Do not use Class C fly ash in Portland cement concrete if the alkali content of the cement exceeds 0.4%. All fly ash is sampled and tested by the Department as it arrives on the project at such frequency as established by the Department. 1024 -6 GROUND GRANULATED BLA ST FURNACE SLAG Use blast furnace slag that meets AASHTO M 302, Grade 100. All slag is sampled and tested by the Department as it arrives on the project at such frequency as established by the Department.
1024-7 Silica Fume
Provide silica fume (microsilica) that meets Tables 1, 2 and 3 of ASTM C1240. All silica fume is sampled and tested by the Department as it arrives on the project at such frequency as established by the Department. 1024 -8 NATURAL POZZOLANS Provide natural pozzolans that meet ASTM C618 for Class N pozzolans, except ensure that the loss on ignition does not exceed 4%. Use natural pozzolans that meet the optional physical requirements for uniformity shown in Table 2 of ASTM C618. All natural pozzolan is sampled and tested by the Department as it arrives on the project at such frequency as established by the Department. CONCRETE CURING MATERIALS 1026 -1 GENERAL All curing materials shall be free from impurities that may be detrimental to the concrete. 1026 -2 LIQUID MEMBRANE CURING COMPOUNDS
A.General Liquid membrane curing compounds shall meet ASTM C309 , except that when tested in the water retention test described in AASHTO T 155 the curing compound shall restrict the loss of water in the test specimen at the time of application of the compound to not
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Source: North Carolina Standard Specifications for Roads and Structures, 2024 Edition. Pages 468–468 of 857. View official source ↗