|Reviewer||% Work Complete|
% Time Elapsed
|In Company with:|
Note: References are "Portland Cement Concrete" Section 505
"Concrete Structures" Section 506
|Concrete Mix Temperature||° F min.||° F max.|
|Air Content||% to||%|
|Slump (no water reducer)||inches to||inches|
|Slump (water reducer)||inches to||inches|
- Which coarse aggregate gradation was selected? Check gradation results for both coarse and fine aggregates (505.2.2, p 301 and 505.2.3, p.302).
- Is the combined minus 200 less than 1.75% (505.2.3.4, p.303)?
- Does the coarse aggregate gradation meet the maximum size aggregate requirement(s) (505.3.1.1, p.305)?
- Has a mix design been submitted and approved (505.3.2, p.307)?
- Is Type II cement being used (505.2.1, p.300)?
- Is fly ash being used? Is it from an approved source? Has maximum replacement been followed (15%) using the replacement ratio specified (1.25:1)? (505.2.5.4, p.303 and 304)
- Are there adequate supplies of aggregate both coarse and fine (505.3.11.8, p.314)?
- Have batch plant scales been certified (505.3.4.1, p.309)?
- Are air-entraining agents and other approved admixtures added to water before it enters the mixer (505.3.4.4, p.309)?
- When using two admixtures, are they kept separate so they will not be in contact prior to entering the mixing drum (505.3.4.4, p.309)?
- Mixing - stationary mixers should have 80 seconds mixing time (505.3.4.5, p.309), and truck mixers should mix for 70 to 100 revolutions (505.3.4.8, p.309) and a minimum of 90 revolutions for front-end discharge trucks (505.3.4.8, p.309)?
- Are transit mixer trucks properly equipped with water meters and revolution counters (505.3.6.2, p.311)?
- W/C ratio shall not exceed the maximum specified. Is the W/C ratio being monitored? Has the W/C ratio been exceeded (505.3.6.3, p.311)?
- If fly ash is used, has the cement been introduced into the mixer before the fly ash (505.3.4.5, p.309)?
- If heated, the mixing water shall be heated to a temperature of not less than 70 ° F nor more than 150 ° F when introduced into the mixer (505.3.5.6, p.310)?
- Are forms properly placed and secure? Has the reinforcing steel been properly placed (506.3.1.2 and 506.3.2, p.317)?
- Are the forms clean and oiled (506.3.2.6 and 506.3.2.7, p.318)?
- When sampled on the deck, is the sample taken from a small pile placed in the same manner as the normal operation in front of the deck screed? Has all the grout been pumped out? (505.3.9.1, p.312)
- Has minimum sampling and testing frequency been met (air content, slump, and strength - one per 50 yd3 of concrete from Table 505-6, p.312 and section 505.3.11.4, p.314)? Has the start-up frequency and frequency after failures been met (505.3.11.3, p.314)?
- Has an adequate storage device for test cylinders been provided at least 24 hours before concrete placement? Has it been checked out (505.3.9.2, p.312)?
- If transit mixer trucks are used, is water added after leaving the plant? Has the W/C ratio been exceeded? If water is added, has concrete been mixed for 30 revolutions (505.3.6.3, p.311)?
- Water shall not be added after 2 CY of concrete has been discharged (505.3.6.3, p.311).
- Has concrete been placed within 90 minutes for temperatures below 80°F and 60 minutes if the temperature is above 80 °F (505.3.7.2, p.311)?
- Is the concrete temperature between 50° F and 90 °F (60 ° F and 90 ° F for cold weather concreting - 506.3.9.2, p.324) at time of placement (505.3.8, p.311)?
- Has curing compound been applied at an appropriate time (within 20 minutes of the tining operation - 506.3.14.1, p.332)?
- Has the surface been textured as specified (1/8 inch-wide, 1/8 inch deep, and spaced randomly from 2 to 3/4 inch - 506.3.13.9, p.332)?
- Has the deck been straight-edged during the deck placement (506.3.13.8, p.331)?
- Review results of air content and slump for compliance with the specifications (Table 505-5, p.305).