- 791 - SECTION 1006 -- CALCIUM CHLORIDE
1006.01 Description
1.Calcium Chloride shall be Type S (Solid) or Type L (Liquid). Calcium Chloride can be used for, but not limited to, dust control and acceleration of t he set of concrete.
1006.02 Material Characteristics
1.The requirements for calcium chloride shall be as shown in ASTM D 98.
1006.03 Acceptance Requirements
1.Acceptance shall be based on requirements contained in the Department’s Materials Sampling Guide. - 792 - SECTION 1007 -- CHEMICAL ADMIXTURES
1007.01 Description
1.Admixtures are materials added to Portland cement concrete to change characteristics such as workability, set time, strength, permeability, freezing point, and curing.
2.The Department's concrete admixture types are:
a.Type A - Water-Reducing Admixture - An admixture that reduces the quantity of mixing water re quired to produce concrete of a given slump.
b.Type B - Retarding Admixture - An admixture that slows down the setting of concrete.
c.Type C - Accelerating Admixture - An admixture that speeds up the setting and early strength development of concrete.
d.Type D - Water-Reducing and Retarding Admixture - An admixture that reduces the quantity of mixing water required to produce concrete of a given slump and slows down the setting of concrete.
e.Type E - Water-Reducing and Accelerating Admixture - An admixture that reduces the quantity of mixing water required to produce concrete of a given slump and speeds up the setting and early strength development of concrete.
f.Type F - Water-Reducing, High Range Admixture - An admixture that reduces the quantity of mixing water required to produce concrete of a given slump by 12% or greater.
g.Type G - Water-Reducing, High Range and Retarding Admixture - An admixture that reduces the quantity of mixing water required to produce concrete of a given slump by 12% or greater and slows down the setting of concrete.
h.Air-Entraining - An admixture that encapsulates air in the concrete.
i.Lithium Nitrate – An admixture used to control the Alkali-Silica- Reaction (ASR) in concrete.
1007.02 Material Characteristics
1.Type A through G admixtures shall meet the requirements in ASTM C 494.
2.Air-entraining admixtures shall meet the requirements in ASTM C 260.
3.Use of admixtures other than t hose cited may be requested by the Contractor.
4.Admixtures shall not contain mo re than 1% of chlorides calculated as calcium chloride.
5.Admixtures shall be used at the manufacturer's recommended dosage rates.
6.The air-entraining admixture char acteristics shall produce concrete with satisfactory workability and a total air content as described in Table 1002.02.
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Source: Nebraska Standard Specifications for Highway Construction, 2017 Edition. Pages 825–825 of 1,048. View official source ↗