810 Page 515810 MASONRY MORTAR SAND AND EPOXY RESIN MORTAR SAND
810.1MASONRY MORTAR SAND
A.General: Aggregate for use in masonry mortar will consist of natural sand or manufactured sand. Manufactured sand is the product obtained by crushing stone, gravel, or air cooled iron blast furnace slag specially processed to assure suitable particle shape as well as gradation. B.Gradation: Percent Passing Sieve Size Natural Sand Manufactured Sand #4 100 100 #8 95 to 100 95 to 100 #16 70 to 100 70 to 100 #30 40 to 75 40 to 75 #50 10 to 35 20 to 40 #100 2 to 15 10 to 25 #200 - - - 0 to 25.0 Note: Not more than 50% may be retained between any two consecutive sieves listed. Not more than 25% may be retained between the #50 and #100 sieves. C.Deleterious Substances: The amount of deleterious substances will not exceed the following limits by dry weight: 1.Clay lumps and friable particles ........................................................................... 1.0% 2.Lightweight particles having a specific gravity of less than 1.95.......................... 0.5% D.Soundness: When the fine aggregate is subjected to 5 cycles of the sodium sulfate soundness test, the weighted loss will not exceed 10% by weight. E.Organic Impurities: The aggregate will be free of injurious amounts of organic impurities. Except as herein provided, aggregates subjected to the test for organic impurities and producing a color darker than the standard will be rejected. Aggregate failing in the test may be used provided that the principally due to the presence of small quantities of coal lignite, or similar discrete particles. Aggregate failing the colorimetric test may be used provided that, when tested for the effect of organic impurities on strength of mortar, the relative strength at 7 and 28 days (when calculated in accordance with Section 10 of AASHTO T 71, the Organic Impurities in Fine Aggregate on Strength of Mortar), is not less than 95%.
810.2EPOXY RESIN MORTAR SAND
A.General: The aggregate will be silica sand. 810 Page 516B.Gradation: Sieve Size Percent Passing #8 100 #50 15 to 40 #100 0 to 10 #200 0 to 0.5 820 Page 517820 COARSE AGGREGATE FOR USE IN PORTLAND CEMENT CONCRETE
820.1GENERAL REQUIREMENTS
A.Coarse Aggregate for Concrete Pavement: The coarse aggregate will consist of ledge rock. Coarse aggregate for continuously reinforced concrete pavement will conform to Size #20. Coarse aggregate for all other PCC pavements will conform to Size #1 or Size #15. B.Coarse Aggregate for Class A Concrete: The coarse aggregate will consist of ledge rock. Coarse aggregate for Class A concrete will conform to the gradation requirements of Size #1, Size #15, or Size #20 as indicated on the mix design. Size #20 will only be allowed when specified in the plans. C.Coarse Aggregate for Bridge Deck Resurfacing: The coarse aggregate will be produced from ledge rock. The coarse aggregate will conform to the gradation requirement of Size #3. D.Coarse Aggregate for Class M Concrete: Coarse aggregate for Class M concrete will meet the gradation requirements for Size #1. If Class M concrete is cast at a commercial precast facility regularly producing other precast items under Section 560, the coarse aggregate will conform to E.Coarse Aggregate for Prestressed and Precast Concrete : The coarse aggregate will be ledge rock. The aggregate size will be consistent throughout the entire structure. Only one source will be used to produce each aggregate size. Coarse aggregate for wet cast concrete will meet the gradation requirements of Size #1 or Size #1A as indicated on the mix design. The gradation requirement will not apply for dry cast concrete. F.Coarse Aggregate for Spall Repair and Extender Aggregate for Packaged Patching Mix Material including Dowel Bar Retrofit Patching Material: The coarse aggregate will be ledge rock. Coarse aggregate for spall repair, except the coarse aggregate used in a packed patching material, will meet the gradation requirements of Size #5. The gradation section does not apply to extender aggregate.
820.2SPECIFIC REQUIREMENTS
A.Deleterious Substances: The amount of deleterious substances will not exceed the following limits by dry weight: Clay lumps ..................................................................................................... 0.3% Shale and other materials having a specific gravity less than 1.95 ............... 1.0% Scratch hardness* .......................................................................................... 2.0% Other deleterious substances (such as alkali, mica, coated grains, flaky particles, coal, lignite, and chocolate rock*) ............. 2.0% *Not required for ledge rock The maximum amount of deleterious substances listed above will not exceed 2.0% by dry weight. The deleterious substances in the coarse aggregate for Class M concrete will not exceed the following limits: