815.11 Use, Care, and Handling.
815.01 Type I Portland Cement.
Type I Portland Cement shall meet the requirements of AASHTO M 85 and the additional requirements shown below.
815.02 Type II Portland Cement.
Type II Portland Cement shall meet the requirements of AASHTO M 85 and the additi onal requirements shown below.
815.03 Type III Portland Cement (High Early Strength).
Type III Portland Cement shall meet the requirements of AASHTO M 85 and the additional requirements shown below.
815.04 Type IS Portland Blast Furnace Slag Cement.
Type I S Portland blast furnace slag cement shall meet the requirements of AASHTO M 240, Blended Hydraulic Cement.
815.05 Type IL Portland Limestone Cement .
Type IL Portland limestone cement shall meet the requirements of AASHTO M 240, Blended Hydraulic Cement.
815.06 Masonry Cement.
Masonry cement shall meet the requirements of ASTM C 91.
815.07 Chemical Properties.
The Specifications for all cements as covered by Articles 8 15.01 to 815.06, inclusive, are amended to the effect that the total alkali content of any cement used, calculated as the percentage of sodium oxide (Na 2O) plus the product of 0.658 times the percentage of potassium oxide (K 2O), shall not exceed 0.60 percent. In addition to the above, for Type II cement covered by Article 815.02, the standard chemical requirement shown in Table 1 of AASHTO M 85 for Tricalcium Silicate (C 3S) is hereby waived.
815.08 Testing of Cement.
All cement furnished for use shall be tested before use or be from an approved producer meeting the requirements of ALDOT -227, Quality Control of Portland and Blended Hydraulic Cements, and listed on List I -2, PRODUCERS OF PORTLAND AND BLENDED CEMENT, of the Department's "Materials, Sources, and Devices With Special Acceptance Requirements" Manual. Refer to Subarticle 106.01(f) and ALDOT - 355 concerning this list.
815.09 Flash Set and False Set.
Flash set and false set, as determined by ASTM C 451, shall be cause for rejection of the cement.
815.10 Unusual Appearance.
Unusual appearance as to color, etc. shall be sufficient grounds for rejection of the cement.
815.11 Use, Care, and Handling.
a.Use.
1.Bulk cement will be permitted provided the bulk cement is handled as follows:
a.Portland cemen t shall be measured by weight {mass}, considering that one bag of cement is equivalent to 94 pounds {42 kg} net of cement.
b.Handling equipment and the equipment used for weight {mass} determination shall be inspected by the Engineer prior to use. Cement shall be fully protected from contamination or damage during handling.
c.Bulk cement shall be batched by weight {mass}, and scales may be of either the beam or springless dial type and shall be the product of a reputable manufacturer. Scales shall be accu rate to within a tolerance of 5 pounds per 1000 pounds {2 kg per 455 kg} net load in the hopper. The value of the minimum gradation of any scale shall not be greater than 0.1 percent of the scale capacity.
817.01 Hydrated Lime.
d.Provisions shall be made to indicate to the ope rator that the required load in the hopper or container is being approached, such as a springless dial indicator or tare beam. Such device shall indicate at least the last 50 pounds {22 kg} of load.
e.After the required weight {mass} of the cement is batc hed, it shall be protected from loss in handling or in transit.
2.Only cement of the same "Type" shall be used in the construction of any structure or unit (substructure or superstructure) except as permitted in writing. All cement in any container having lumps of cement or caked cement, or cement which for any reason has become damaged or partially set, shall be rejected. Cement salvaged from discarded or used bags shall not be used. Cement shall not be used while its temperature is more than 150 °F {65 °C}.
3.The Contractor shall keep accurate records of the deliveries of cement and its use in the work including that from ready -mix plants. Copies of these records shall be furnished the Engineer at the close of each day's work or 8 hour run, in such form as he may require, showing the quantity used during the day or run at each part of the work.
b.Care and Handling .
1.The Contractor shall provide suitable means for storing and protecting the cement against dampness. Cement not for immediate use shall be stored in suitable weather proof buildings. Buildings shall be placed in approved locations. Provisions for storage shall be ample and the shipment of cement as received shall be separately stored in such a manner as to provide easy access for identificat ion and inspection of each shipment. On small structures, storage in the open may be permitted by authorization, in which case a raised platform and ample waterproof covering shall be provided. Stored cement shall meet the test requirements at any time aft er storage when a retest is ordered.
2.Cement of different types, even if tested and approved, shall be stored separately and shall not be mixed. SECTION 817 LIME FOR ROADBED AND BASE STABILIZATION
817.01 Hydrated Lime.
Hydrated lime shall be high calcium (Type 1) and shall conform to AASHTO M 216 when tested in accordance with AASHTO T 219. Hydrated lime shall be stored and handled in water- proof containers until immediately before distribution to the road. If storage bins are used, they shall be c ompletely enclosed. Hydrated lime in bags shall be stored in weatherproof buildings with adequate protection from ground dampness.
817.02 Quicklime.
Quicklime shall meet the requirements of AASHTO M 216 after hydration in the laboratory. When quicklime is to be applied directly to the roadbed, the following additional requirements shall apply: Sieve % Passing by Weight {Mass} 3/4 inch {19.0 mm} 100 1/2 inch {12.5 mm} 30 - 80 No. 4 {4.75 mm} 0 - 10 Quicklime shall be handled and stored in waterproof containers until used. Accidental contact with water shall be avoided. SECTION 820 SELECTED MATERIALS FOR BASES
820.01 Description.
Selected materials for the purpose of these specifications shall be of the kind and general character of sand -clay, chert, clay -gravel, sand, local stone, stone screenings, etc., or combinations thereof, with or without commercial aggregate meeting the requirements noted in this Section.
Source: Alabama Standard Specifications for Highway Construction, 2022 Edition. Pages 730–730 of 934.