Attachment 8 1042 2012 Standard Specifications.pdf

Section 1042

10-61

A. Weight loss for 4 of 5 specimens after 150 cycles in water. 1

1040-5 CEMENT 2

Portland cement shall meet Article 1024-1. 3

Masonry cement shall meet ASTM C91. 4

1040-6 HYDRATED LIME 5

Hydrated lime shall meet ASTM C207 for Type N. 6

1040-7 MORTAR SAND 7

Mortar sand shall meet Article 1014-1, except it shall meet the gradation requirements for 8 No. 4S sand shown in Table 1005-2. 9

1040-8 WATER 10

Water shall meet Article 1024-4. 11

1040-9 MORTAR 12

Proportion mortar used in all brick and block masonry by volume as shown below. Do not 13 add any more water than is necessary to make a workable mixture. 14

Mix No. 1: 1 part Portland cement 1/4 part hydrated lime 3 3/4 parts mortar sand (maximum)

Mix No. 2: 1 part Portland cement 1 part masonry cement 6 parts mortar sand (maximum)

Apply Articles 1040-4, 1040-5, 1040-6 and 1040-7 to all cement, hydrated lime, mortar sand 15 and water. 16

For the hydrated lime and cement portion of Mix No. 1, the Contractor may substitute 17 Type M or Type S masonry cement that meets ASTM C270 for Type S masonry cement the 18 minimum compressive strength of the test specimens shall be 2,500 psi at 28 days and the test 19 specimens shall be composed of one part Type S masonry cement and 3 parts sand. Furnish 20 a Type 3 certification for the Type M or Type S masonry cement in accordance with 21 Article 106-3. 22

SECTION 1042 23

RIP RAP MATERIALS 24

Use field stone or rough unhewn quarry stone for plain rip rap. Use stone that is sound, 25 tough, dense, resistant to the action of air and water and suitable in all other respects for the 26 purpose intended. Where broken concrete from demolished structures or pavement is 27 available, it may be used in place of stone provided that such use meets with the approval of 28 the Engineer. However, the use of broken concrete that contains reinforcing steel will not be 29 permitted. 30

TABLE 1040-1

SRW UNIT REQUIREMENTS

Property Requirement Test Method Compressive Strength for SRW Units 4,000 psi min ASTM C140

Compressive Strength for Freeze-Thaw Durable SRW Units 5,500 psi min ASTM C140 Absorption 5% max ASTM C140

Durability for Freeze-Thaw Durable SRW Units 1% maxA ASTM C1262

NCDOT 2012 Standard Specifications

Section 1043

10-62

All stone shall meet the approval of the Engineer. While no specific gradation is required, 1 there shall be equal distribution of the various sizes of the stone within the required size 2 range. The size of an individual stone particle will be determined by measuring its long 3 dimension. 4

Stone or broken concrete for rip rap shall meet Table 1042-1 for the class and size 5 distribution. 6

TABLE 1042-1

ACCEPTANCE CRITERIA FOR RIP RAP AND STONE FOR EROSION CONTROL

Required Stone Sizes, inches Class

Minimum Midrange Maximum A 2 4 6 B 5 8 12 1 5 10 17 2 9 14 23

No more than 5.0% of the material furnished can be less than the minimum size specified nor 7 no more than 10.0% of the material can exceed the maximum size specified. 8

SECTION 1043 9

AGGREGATE FROM CRUSHED CONCRETE 10

1043-1 GENERAL 11

Aggregate from crushed concrete is a recycled product made by crushing concrete obtained 12 from concrete truck clean out, demolition of existing concrete structures or pavement, or 13 similar sources and transported from a crushing facility. It does not include concrete 14 pavements that are rubblelized, broken or otherwise crushed in place on the roadway. 15

The crushed material must meet all sources approval requirements described in Sections 1005 16 and 1006 with the exception of the sodium sulfate test requirement. Deleterious materials 17 shall not be more than 3%. 18

Sampling and acceptance for the determination of gradaction, LL and PI will be performed as 19 described in the Aggregate QC/QA Program Manual and the Aggregate Sampling Manual. 20

1043-2 AGGREGATE BASE COURSE 21

The material shall meet the ABC gradation. The LL of the material shall be raised 5 points to 22 no more than 35. 23

1043-3 AGGREGATE SHOULDER BORROW 24

The material shall meet Section 1019. 25

1043-4 CLEAN COARSE AGGREGATE FOR ASPHALT 26

The material shall meet the gradation of a standard size in Table 1005-1. Use of the material 27 shall be approved by the Engineer, and the mix shall meet all requirements. 28

1043-5 CLEAN COARSE AGGREGATE FOR CONCRETE 29

The material shall meet the gradation of a standard size in Table 1005-1. Use of the material 30 is restricted to Class B concrete mixes only. Use of the material shall be approved by the 31 Engineer, and the concrete shall meet all requirements. 32

SECTION 1044 33

SUBSURFACE DRAINAGE MATERIALS 34

1044-1 SUBDRAIN FINE AGGREGATE 35

Subdrain fine aggregate shall meet No. 2S or 2MS in Table 1005-2. 36

NCDOT 2012 Standard Specifications