Material Matters - Spring 2018 - 33

to get testing labs and overall testing to fol-

It warns us that exceeding a mix's w/cm

low ACI standards in regards to max/min

will have an undesirable effect on the con-

thermometers, proper curing 60-80F and

crete properties, including reduced strength

delegation of compressive strength reports

and DURABILITY.

the performance of the concrete, they may be
aesthetically undesirable.
To avoid yield discrepancies, the user needs to
understand that the volume of hardened concrete

to producers. We ask the NYSDOT to be more

When placing an order for concrete, a number

may be, or appears to be, less than expected due

in conformance with ACI/AASTHO/ASTM

of items need to be considered. The volume of

to waste and spillage, over-excavation, spreading

yet we ignore our own guidance from ACI?

the concrete, expressed in cubic yards (cubic

forms, some loss of entrained air, or settlement of

ACI 322 clearly spells out the responsibility

meters), should be calculated by the contrac-

wet mixtures, none of which are the responsibil-

of the producer and contractor.

tor and provided to the concrete producer. The

ity of the producer.

strength of the concrete, type of cement, desired

Before discharge, a one-time addition of water

responsibility:

slump, maximum size of coarse aggregate, and

to the concrete (to increase slump) at the job site

* when ordering, curing, finishing,

the use of chemical admixtures and supplemen-

is permitted provided that the intended w/cm is

* load color variations, crazing, yield dis-

tary cementitious materials, or both, should

not exceeded. The amount of added water should

be agreed upon.

be documented, including reduced strength

The specification covers the contractor's

crepancies, cracking and
* "before discharge, a ONE-TIME addition of

Day-to-day variations in materials; plac-

and durability.

water to the concrete (to increase slump)

ing, finishing, and curing techniques;

I am not naïve to the fact that we as produc-

at the job site is permitted provided that

and weather conditions can produce varia-

ers have to weigh the cost-benefit of helping

the intended w/cm is not exceeded. The

tions in the color of the finished concrete.

out contractors and homeowners when issues

amount of water should be documented."

Although these variations may not affect

arise. I understand that there is a monetary

Fig. 2.7: Weathering probability map for concrete.
Material Matters * Spring 2018 33



Table of Contents for the Digital Edition of Material Matters - Spring 2018

Chairman’s Message
President’s Report
Legislative Update
Counsel’s Corner
Membership Benefit
Member KUDOS
Work the Problem
2017 Asphalt Pavement Showcase Award Winners
One Company’s Efforts to Set up an Asphalt Plant
An Interview with NYSDOT’s Don Streeter
Residential Concrete
Welcome New Members
Material Matters - Spring 2018 - Intro
Material Matters - Spring 2018 - cover1
Material Matters - Spring 2018 - cover2
Material Matters - Spring 2018 - 3
Material Matters - Spring 2018 - 4
Material Matters - Spring 2018 - 5
Material Matters - Spring 2018 - 6
Material Matters - Spring 2018 - Chairman’s Message
Material Matters - Spring 2018 - 8
Material Matters - Spring 2018 - President’s Report
Material Matters - Spring 2018 - Legislative Update
Material Matters - Spring 2018 - 11
Material Matters - Spring 2018 - Counsel’s Corner
Material Matters - Spring 2018 - 13
Material Matters - Spring 2018 - 14
Material Matters - Spring 2018 - 15
Material Matters - Spring 2018 - 16
Material Matters - Spring 2018 - Membership Benefit
Material Matters - Spring 2018 - 18
Material Matters - Spring 2018 - Member KUDOS
Material Matters - Spring 2018 - 20
Material Matters - Spring 2018 - Work the Problem
Material Matters - Spring 2018 - 22
Material Matters - Spring 2018 - 23
Material Matters - Spring 2018 - 2017 Asphalt Pavement Showcase Award Winners
Material Matters - Spring 2018 - 25
Material Matters - Spring 2018 - One Company’s Efforts to Set up an Asphalt Plant
Material Matters - Spring 2018 - 27
Material Matters - Spring 2018 - An Interview with NYSDOT’s Don Streeter
Material Matters - Spring 2018 - 29
Material Matters - Spring 2018 - 30
Material Matters - Spring 2018 - 31
Material Matters - Spring 2018 - Residential Concrete
Material Matters - Spring 2018 - 33
Material Matters - Spring 2018 - 34
Material Matters - Spring 2018 - Welcome New Members
Material Matters - Spring 2018 - 36
Material Matters - Spring 2018 - 37
Material Matters - Spring 2018 - 38
Material Matters - Spring 2018 - cover3
Material Matters - Spring 2018 - cover4
https://www.nxtbook.com/naylor/NCMB/NCMB0218
https://www.nxtbook.com/naylor/NCMB/NCMB0118
https://www.nxtbook.com/naylor/NCMB/NCMB0217
https://www.nxtbook.com/naylor/NCMB/NCMB0117
https://www.nxtbook.com/naylor/NCMB/NCMB0216
https://www.nxtbook.com/naylor/NCMB/NCMB0116
https://www.nxtbook.com/naylor/NCMB/NCMB0215
https://www.nxtbook.com/naylor/NCMB/NCMB0115
https://www.nxtbook.com/naylor/NCMB/NCMB0214
https://www.nxtbook.com/naylor/NCMB/NCMB0114
https://www.nxtbook.com/naylor/NCMB/NCMB0213
https://www.nxtbook.com/naylor/NCMB/NCMB0113
https://www.nxtbook.com/nxtbooks/naylor/NCMB0212
https://www.nxtbook.com/nxtbooks/naylor/NCMB0112
https://www.nxtbook.com/nxtbooks/naylor/NCMB0211
https://www.nxtbook.com/nxtbooks/naylor/NCMB0111
https://www.nxtbookmedia.com