Cement Manufacturing, Properties, and Types
Cement Manufacturing Process
Cement is produced using limestone, rich in calcium oxides, and a silica-rich component like clay or blast furnace slag. These are mixed and heated in a rotary kiln, creating clinker, which contains:
- Dicalcium silicate
- Tricalcium aluminate
- Tricalcium silicate
- Tetracalcium ferroaluminate
Cement Properties
Specific Weight (Density)
The specific weight is the ratio of cement weight to its actual volume. It’s measured using a Chatelier flask, determining the displacement of liquid
Read MoreBitumen Refinery Processing, Road Rutting Causes, and Grades
What is Refinery Processing of Bitumen?
The most common refining process used to produce bitumen is the straight reduction of crude oil, or a crude blend, using atmospheric then vacuum distillation. Bitumen produced in this manner is referred to as straight-run and is typically used in paving applications. The crude is heated by a furnace and is sent to a distillation tower, where it is separated by boiling point. Then the material is converted by heating, pressure, or a catalyst into finished products
Read MoreClassification Societies: Ensuring Maritime Safety and Standards
Classification Societies
Classification societies are organizations that establish standards for the construction and maintenance of merchant vessels. They also provide technical services to assist owners in maintaining those standards. Most boats are “classified” or recorded in a classification society. Classification societies have inspectors who ensure that ships are built according to prevailing standards and periodically inspect the boats to ensure they are kept in optimal condition. Many maritime
Read MoreCommercial Vehicle Operation: Safety & Regulations
Key Safety Points for Commercial Vehicle Drivers
- Truck escape ramps help avoid vehicle damage.
- Driving in heavy traffic at 35 mph when the speed limit is 55 mph is unsafe.
- Brakes absorb more heat to stop heavier or faster-moving vehicles.
- Water can be used on tire fires.
- A first offense of driving a commercial vehicle under the influence of alcohol or drugs results in a CDL loss of at least one year.
- During a pre-trip inspection, brake shoes should not have oil, grease, or brake fluid on them.
- A slow-moving
Essential Safe Driving Tips and Techniques
Developing Good Driving Habits
When driving, you should develop good habits such as:
- Not staring at an object for more than 2 seconds.
Maintaining Safe Following Distance
When driving, you should stay at least:
- Two seconds or one car length per 10 mph behind the vehicle in front of you to give yourself time to react.
The 3-Second Rule
What is the 3-second rule used for?
- Maintaining a safe following distance.
Skid Control
If you go into a skid:
- Take your foot off the gas pedal.
If you are driving and your car
Read MorePaint Application: Best Practices and Quality Control
Recommendations for Implementation and Control
- Surfaces must be dry, and the humidity and temperature should be such that they do not lead to condensation but produce vapors.
- If the surface is hot, it can lead to boiling of the paint, causing craters and blisters.
- At the reception, check the labels of the containers. The container must not be beaten. Stir, let stand for one hour, and apply within the six hours that follow; if more time passes, it no longer works.
- At the end of the day, all the equipment