2009 Virginia Uniform Statewide Building Code USBC Concrete Specifications By Teck L Chua PE Director Technical Services NVCAC A pril 11 2013 Overview The law people with handcuffs ID: 781260
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East Region - RM Concrete
2009 Virginia Uniform Statewide Building Code(USBC)
Concrete
Specifications
By: Teck L. Chua, PE
Director -
Technical Services
NVCAC,
A
pril 11, 2013
Slide2Overview
The law (people with handcuffs).
Detail Code requirements on concrete.
When the Virginia Code provides no details – what’s next?
East Region - RM Concrete
Slide3East Region - RM Concrete
Effective March 1, 2011
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Deadline: March 1, 2012
Slide8East Region - RM Concrete
Slide9East Region - RM Concrete
Slide10Code Requirements – the Details on concrete
East Region - RM Concrete
Slide11East Region - RM Concrete
Two zones in Virginia
Slide12East Region - RM Concrete
Should have been named concrete requirements
Slide13Northern Concrete Division www.vulcanmaterials.com/northern_concrete
Deicing chemical exposure limits content of fly ash, slag cement, other pozzolans
Slide14Northern Concrete Division www.vulcanmaterials.com/northern_concrete
Material Standards: ACI 318-08 Ch. 3 or ACI 332
The usual ASTMs covering cementitious materials, aggregates, water, admixtures, ready mixed concrete, sampling and testing.
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Driveway and Walkway are not mentioned!
Slide17When the Virginia Code has no details – Anything goes?
East Region - RM Concrete
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What if “generally recognized standards of performance
ARE
available . . . ?“
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IRC:
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Slide23“Cal” – calcium chloride
Reinforced: yes, when dry or protected
Plain: yes, all conditions
“2.0% by weight of
cementitious
materials”
450pcy*2% < 9
pcy
530pcy*2% < 10.6
pcy
Molecular weight: calcium chloride 2X chloride ion
ACI332-2% < ACI 318-0.15%
Slide24Northern Concrete Division www.vulcanmaterials.com/northern_concrete
Placement time > 90 min
Slide25Northern Concrete Division www.vulcanmaterials.com/northern_concrete
Slide26Northern Concrete Division www.vulcanmaterials.com/northern_concrete
Slide27Northern Concrete Division www.vulcanmaterials.com/northern_concrete
Slide28Northern Concrete Division www.vulcanmaterials.com/northern_concrete
Slide29Northern Concrete Division www.vulcanmaterials.com/northern_concrete
Jt. Depth: Min 3.5”*0.25 = 0.875” = 7/8”
Slide30Northern Concrete Division www.vulcanmaterials.com/northern_concrete
Slide31Northern Concrete Division www.vulcanmaterials.com/northern_concrete
WWF – reinforcement?
Slide32Summary
Residential concrete construction is governed by a Code that is as tough as commercial concrete construction.
Concrete exposed to deicing chemicals, such as driveways, requires 4500psi concrete.
East Region - RM Concrete
Slide33Questions ?
East Region - RM Concrete