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2.

Face-Mix Fine Aggregates:  Selected, natural or manufactured sand of the same material as coarse aggregate, unless otherwise approved by Architect.

Delete paragraph below when architectural requirements dictate that face-mix be used throughout.

C.

Backup Concrete Aggregates:  ASTM C33 or C330.

Lightweight aggregates in a face-mix are not recommended in cold or humid climates (if exposed to the weather) unless their performance has been verified by tests or records of previous satisfactory usage in similar environments.  If normal-weight aggregates are used in face-mix, lightweight aggregates in backup are not recommended due to bowing potential.

D.

Lightweight Aggregates:  Except as modified by PCI MNL 117, ASTM C 330 with absorption less than 11 percent.

Delete first paragraph below if coloring admixture is not required.  Add color selection if known.

E.

Coloring Admixture:  ASTM C 979, synthetic or natural mineral-oxide pigments or colored water-reducing admixtures, temperature stable and non-fading.

F.

Water:  Potable; free from deleterious material that may affect color stability, setting, or strength of concrete and complying with chemical limits of PCI MNL 117.

Delete paragraph below if air entrainment is not required.  Air entrainment should be required to increase resistance to freezing and thawing where environmental conditions dictate.

G.

Air Entraining Admixture:  ASTM C 260, certified by manufacturer to be compatible with other required admixtures.

Add types of chemical admixtures, if known, or limit types if required.  Water-reducing admixtures, Types A, E, and D, or a high-range water reducer, Type F, predominate.

H.

Water-Reducing Admixture: ASTM C 494/C494M, Type A.

I.

Retarding Admixture: ASTM C 494/C494M, Type B.

J.

Water-Reducing and Retarding Admixture: ASTM C 494/C494M, Type D.

K.

High-Range, Water-Reducing Admixture: ASTM C 494/C494M, Type F.

L.

High-Range, Water-Reducing and Retarding Admixture: ASTM C 494/C494M, Type G.

M.

Plasticizing Admixture for Flowable Concrete:  ASTM C 1017/C1017M.

N.

Admixtures containing calcium chloride or more than 0.15 percent chloride ions or other salts by weight of admixture are not permitted.

2.6

 STEEL CONNECTION MATERIALS

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