RedVector RV-10833

Essentials of Quality Concrete

Essentials of Quality Concrete

2 hrs. Online Course

Level: Fundamental

Item#: RV-10833

SME: Colin Lobo, Ph. D., P.E.

Average Rating

4 54
This course provides an overview of concrete, including its properties and basic components, the properties required for plastic and hardened concrete, and the variables that influence the quality of concrete. It will discuss some of the mechanical and durability characteristics required of concrete for various applications. The materials used in concrete mixtures, including portland cement, supplementary cementitious materials, aggregates, water and air will be discussed along with the general concepts of proportioning concrete mixtures. This course will introduce admixtures and explain their purpose. It explores air entraining and water reducing admixtures, accelerators and retarders, as well as other "value added" admixtures. This course also provides the basics of troubleshooting concrete slabs, such as workability, place-ability, finish-ability, and causes for cracking and other defects in concrete.
Course Objectives
By the end of this course, you will be able to:
  • Name the benefits of using concrete for construction
  • Have a general overview of all the ingredients used in concrete
  • Identify the chemical reaction between Portland cement and water
  • Discuss other necessary properties of freshly mixed concrete as placed for different applications
  • Define curing and explain why it's important
  • Recall the environmental factors that increase the probability for plastic shrinkage cracking
  • Discuss factors that impact the strength of concrete
  • Discuss the various durable aspects of concrete
SUBJECT MATTER EXPERT: Colin Lobo, Ph. D., P.E.
Colin Lobo, Ph. D., P.E. Photo
Colin L. Lobo is Senior Vice President of the Engineering Division of the National Ready Mixed Concrete Association in Silver Spring, Maryland. Besides managing the Engineering Division, his responsibilities include managing programs of NRMCA Research, Engineering and Standards Committee and the NRMCA P2P Steering Committee, coordinate and report on some of the Association’s research studies, provide information to the membership and others, coordinate and administer NRMCA technical training programs, and develop NRMCA technical publications. Colin manages the NRMCA certification programs for Ready Mixed Concrete Production Facilities, Concrete Technologists and Pervious Concrete Contractors.
 
Colin has been with NRMCA since 1991.
 
Colin holds a Bachelor of Engineering Degree in Civil Engineering from Mysore University in India. He received a Masters of Science Degree from Northeastern University in Boston and a Ph.D. from Purdue University in West Lafayette, Indiana. He has published several papers as a result of his research work at Purdue and NRMCA.
 
Colin is an active member on various committees of the American Society for Testing and Materials (ASTM) and the American Concrete Institute (ACI). He is a member of the American Society of Civil Engineers (ASCE) and participates in the technical committee work of the Transportation Research Board (TRB). Colin has been a member of technical task groups and research panels of AASHTO and FHWA. He is a registered professional engineer in the State of Maryland.
 
On ACI, Colin is a member of ACI Committees 318 (Building Code), 301 (Specifications), 214 (strength testing), 211 (mixture proportioning), and educational committee E701 on concrete materials. He serves as the recording secretary of ACI 301. He is a Fellow of the ACI.
 
On ASTM, Colin is a member of ASTM Subcommittees 09.94 data analysis, 09.96 (CCRL), 09.40 (ready mixed concrete), 09.60 (fresh concrete tests), 09.61 (strength testing), 01.10 (cement specifications) and many others. He serves as recording secretary for 09.60 and 09.40.
 
He serves as NRMCA’s representative on the FHWA Concrete Pavement Technology Program Engineering ETG (Task 65), Performance Specifications ETG, Mixture Optimization ETG, PCA’s Product Standards and Technology Subcommittee and other technical committees as pertinent to the goals of the NRMCA.
 
Colin has coordinated and reported on research activities at NRMCA related to measurement of water content in fresh concrete, use of wash water in ready mixed concrete, effects of reuse of returned concrete on concrete properties, testing high strength concrete and cores, alkali silica reactivity tests, reuse of returned concrete, maturity of high volume fly ash concrete, concrete durability research and several smaller research projects.
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Course Reviews (54)
good course
By on Mar, 29, 2021
good course
Excellent! Needs more visuals
By on Jan, 08, 2021
Excellent! Needs more visuals...
great
By on Jan, 04, 2021
great
very informative
By (Engineer) on Nov, 09, 2020
very informative
Excellent "refresher" course!
By (Engineer) on Nov, 19, 2020
Excellent "refresher" course!
Very informative and easy to follow
By on Apr, 11, 2021
Very informative and easy to follow.
Very thorough and a hard exam !
By (Engineer) on Nov, 27, 2020
Very thorough and a hard exam !
Very thorough discussion of all aspects of concrete production and use
By (Engineer, Land Surveyor) on Jul, 20, 2021
Very thorough discussion of all aspects of concrete production and use
Great info for the building trades
By (Engineer) on Dec, 08, 2020
Great info for the building trades. Had a hard time answering all the questions though
ABSOLUTELY ENJOYED THE COURSE
By on Jun, 09, 2021
ABSOLUTELY ENJOYED THE COURSE. WOULD RECOMMEND TO COLLEGUES ,
easy to listen to; clear objectives and thorough content
By (Engineer) on Dec, 20, 2020
easy to listen to; clear objectives and thorough content
great overview
By (Engineer) on Apr, 25, 2021
great overview
I thoroughly enjoyed this course
By (Engineer) on Feb, 09, 2021
I thoroughly enjoyed this course. It opened my eyes to the wonders on concrete work.
this class was very long
By on Feb, 02, 2021
this class was very long.
Presentation was a little boring
By (Engineer) on Feb, 09, 2021
Presentation was a little boring.
Very extensive course with a lot of information
By on Feb, 16, 2021
Very extensive course with a lot of information.
The video did not work for me but the closed caption were easy to follow
By on Feb, 16, 2021
The video did not work for me but the closed caption were easy to follow
great course
By on Mar, 05, 2021
great course
Video and audio was extremely helpful to keep engaged
By (Engineer, Professional Organization) on Mar, 21, 2021
Video and audio was extremely helpful to keep engaged.
This course keeps the videos under 5 min with similar topics being discussed one after another
By on Apr, 26, 2021
This course keeps the videos under 5 min with similar topics being discussed one after another. Thus, making it easier for the learner to follow the ideas.
great detail, but too much detail to learn in short period of time
By (Geologist / Geoscientist) on Jan, 27, 2021
great detail, but too much detail to learn in short period of time
Should be 3 PDH
By (Engineer) on Sep, 15, 2021
Should be 3 PDH.
Course was informative - the title says 2 hours, but the course took much longer than 2 hours
By (Engineer) on Apr, 07, 2021
Course was informative - the title says 2 hours, but the course took much longer than 2 hours. Information was good.
to detailed for a 2hr course
By (Contractor / Trades, Engineer) on Dec, 26, 2020
to detailed for a 2hr course.. tooo long also
good overview
By (Engineer, Professional Organization) on Jun, 29, 2021
good overview
Video was helpful
By (Architect) on Dec, 22, 2020
Video was helpful. Some exam questions not adequately answered in course, and had to be looked up elsewhere.
The course was useful however the notes are hard to follow
By (Engineer) on Jul, 15, 2021
The course was useful however the notes are hard to follow.
some really poorly worded exam questions and nit picky items
By (Engineer) on Nov, 23, 2020
some really poorly worded exam questions and nit picky items
Nice
By on Sep, 07, 2021
Nice
much longer than 2 hours
By (Engineer) on Jun, 19, 2021
much longer than 2 hours
Computer latency was an issue, and impacted ability for course to stream
By (Architect) on Aug, 10, 2021
Computer latency was an issue, and impacted ability for course to stream. Took abut 7 hours for a 2 hour course.
Very informative
By (Engineer) on Aug, 24, 2021
Very informative
Lots of content in a complicated subject
By (Engineer) on Jun, 15, 2021
Lots of content in a complicated subject. difficult to gain a working knowledge. seemed a bit disorganized, but that may be my lack of knowledge made it hard to connect the parts together.
much longer than 2 hours
By (Engineer) on Jun, 19, 2021
much longer than 2 hours
I did not like I did not like the presentation
By (Engineer) on Feb, 16, 2021
I did not like I did not like the presentation.
decent course
By on Oct, 14, 2020
decent course
Some quiz topics simply don't appear in the course material
By (Engineer) on Sep, 08, 2021
Some quiz topics simply don't appear in the course material.
Too Long
By (Engineer) on Feb, 10, 2021
Too Long.
The course material was too long for a 2 credit hour course
By (Engineer) on Dec, 04, 2020
The course material was too long for a 2 credit hour course. The questions in the exam were written in a fashion to easily "trip up" the student. No questions in the exam should be based on material that was not clearly discussed in his lectures.
Needs text added for better clarification of the content and test material
By (Engineer) on Oct, 21, 2020
Needs text added for better clarification of the content and test material
very long, lots of info, split into two 1
By on Nov, 09, 2020
very long, lots of info, split into two 1.5 hr classes
Very difficult to go back and find a particular subject
By (Contractor / Trades, Engineer) on Jul, 25, 2021
Very difficult to go back and find a particular subject. the topic is good . the way it is structured is very user unfriendly
This was a miserable course
By (Engineer) on Dec, 18, 2020
This was a miserable course. The instructor should have spend more time on giving us notes of what he actually said, versus the smart notes that had very little of his comments. I will NOT take another class from this instructor, and am cancelling the one I signed up for after this. This is the SECOND worst REDVECTOR course I've ever taken; the worst was Building Commissioning. This course as-is is very poor and needs reworked.
audio is best used for support of text
By (Architect) on Dec, 26, 2020
audio is best used for support of text. Little text used in this presentation. Little emphasis on important points
Rambling and lack of visual aids used in webinar presentation
By (Engineer) on Mar, 26, 2021
Rambling and lack of visual aids used in webinar presentation.
The written text is difficult to read and follow
By (Engineer) on Dec, 28, 2020
The written text is difficult to read and follow. It appears to be more of a transcript of a presentation than a formal document. The content was what was expected.
Course did not clearly cover the questions in the test
By (Architect) on May, 21, 2021
Course did not clearly cover the questions in the test. Some questions were not answered at all in the course presentation.
this took a long time and a lot of effort
By (Engineer) on Dec, 31, 2020
this took a long time and a lot of effort. This should have been 3-4 hours of pdh. It was pretty thorough though.
All over the place with the discussion
By on Feb, 18, 2021
All over the place with the discussion.
This class brings together everything one hates and fears in a RedVector class
By (Engineer) on Jan, 12, 2021
This class brings together everything one hates and fears in a RedVector class. Not only did this two hour class take 2 hours and 45 minutes to complete, I think it is completely possible that whomever wrote the test never actually sat through the class. Of the 20 questions in the class, five were never covered in the class. I had to resort to google and reading the ASTM code on my own to find what I hoped was the right answer. In addition, another test question, asking the definition of workability, did not contain anything close to the right answers in the options. To anyone considering this class, do yourself a favor and move along to another. Save yourself the time and spare your frustrations.
The course was built around an oral presentation with slides yet the transcript used in the hard copy material left out things that must have been on slides
By (Engineer) on Jan, 30, 2021
The course was built around an oral presentation with slides yet the transcript used in the hard copy material left out things that must have been on slides. Thus external research was required.
The reading material is difficult to follow because it is a transcript of a presentation
By (Engineer) on Nov, 30, 2020
The reading material is difficult to follow because it is a transcript of a presentation. There are a lot of errors which may go unnoticed when being spoken at a live event, but have a negative impact on readability. Also the transcript references charts and other visuals which are not included with the document. Even a small amount of editing of this material would make a big difference.
HE'S NOT A GOOD INSTRUCTOR
By (Building Inspector, Contractor / Trades) on May, 04, 2021
HE'S NOT A GOOD INSTRUCTOR
Very hard to follow
By (Architect, Professional Organization) on May, 03, 2021
Very hard to follow