820.03 Specific Requirements.
820.03 Specific Requirements .
General COMPOSITION Sieve Requirements Percentage Passing By Weight {Mass} TYPE A A-1 B B-1 C* 3 inch {75 mm} 100 100 100 100 100 No. 8 {2.36 mm} 60-100 42-100 22-75 20-70 20-50 No. 200 {75 µm} 7-45 5-45 3-38 3-46 3-35 Liquid Limit (LL) 28 Max. 35 Max. 28 Max. 35 Max. 45 Max. Plasticity Index (PI) 8 Max. 15 Max. 8 Max. 15 Max. 20 Max. * CBR of 40 + with swell of less than 5% Material placed on the road found not meeting the above requirements may in lieu of removal and replacement be stabilized with approved materials in such proportions that the finished layer will meet the above specified requirements. GRANULAR SOIL MATERIALS
821.01 Description.
Granular Soil for the purpose of these Specifications shal l be of the kind and general character of sand-clay, topsoil, sand, soft sand rock, etc., or combinations thereof meeting the requirements noted in this Section.
821.02 General Requirements.
a.General . The material shall meet the general requirements for the respective material noted in this Article and the specific requirements noted in Article 821.03. Reference is made to Subarticle 820.02(a) for definition of terms for coarse aggregate, binder, artificial mixture, and blends.
b.Sand C lay. See Subarticle 820.02(b).
c.Topsoil Base Material . Topsoil base material shall consist of a natural material or artificial mixture, sometimes pebbly in character, that occurs in surface deposits of limited depth and in general on elevated areas.
d.Foundry Sand . Foundry sand shall be a waste material consisting of burned sand with or without slag fragments. In general, this material is waste or by -product material from foundry operations.
e.Soft Sand Rock . Soft sand rock shall be a friable natural material, generally sandy in character and occurring as a partially disintegrated sandstone with occasional hard strata, in sub surface formations of varying thickness and in general on elevated areas. Blasting is usually required to facilitate loading with power shovels. Pulverizing by use of rollers, tractors, or other equipment is usually necessary.
f.Local Sand . See Subarticle 820.02(e).
823.02 General Requirements.
821.03 Specific Requirements.
General COMPOSITION Sieve Requirements Percentage Passing By Weight {Mass} TYPE A B C 2 inch {50 mm} 100 100 100 No. 8 {2.36 mm} 20-100 20-100 20-100 No. 10 {2.00 mm} 19-100 18-99 18-95 No. 40 {425 µm} 10-100 8-95 6-65 No. 200 {75 µm} 2-45 2-40 2-35 Clay 2-18 1-18 1-16 Liquid Limit (LL) 25 Max. 25 Max. 25 Max. Plasticity Index (PI) 6 Max. 6 Max. 6 Max. Material placed on the road found not meeting the above requirements may, in lieu of removal and replacement, be stabilized with approved materials in such proportions that the finished layer will meet the above specified requirements. SECTION 822 DRAINAGE PLANE MATERIALS
822.01 General.
Drainage plane material shall, unless otherwise specified by plan details, be restricted to ALDOT Sizes 57, 67, 68 or 78 conforming to the requirements of Section 801 mo dified to require a minimum permeability of 50 mm/sec. as determined by the Constant Head Permeameter Test. Each material source will be pretested for permeability before shipments of material to the project are begun, and after approval no further permeability tests will be required provided there are no significant changes in the characteristics of the material noted; however, continuing gradation tests of the material will be made. SECTION 823 SOIL AGGREGATE MATERIALS
823.01 Description.
Soil Aggregate for the purpose of these Specifications is classified according to the several kinds and general characteristics set forth in this Section.
823.02 General Requirements.
a.General . The material shall meet the general requirements noted in this Article and the specific requirements noted in Article 823.03. Reference is made to Subarticle 820.02(a) for definitions of terms, coarse aggregate, binder, artificial mixture and blends.
b.Clay Gravel . See Subarticle 820.02(d).
c.Clay Gravel -Sand. Clay grave l-sand shall meet the general requirements provided in Subarticle 823.02(b) for clay gravel, except that it is an artificial mixture composed of clay gravel and sand.
d.Chert . See Subarticle 820.02(c).
Source: Alabama Standard Specifications for Highway Construction, 2022 Edition. Pages 733–733 of 934.