Job Description for a Concrete Mixer Truck Driver

A concrete mixer truck driver delivers concrete and other cement-based mixtures to industrial, commercial and residential construction job sites. She may work for a hard construction material supply company or be an independent operator who owns and operates her own truck. Her customers are normally located within a local district or region.

Skill Requirements

• A person with this job must be able to safety operate the truck and its auxiliary equipment such as levers, chutes and mixing drums. When she picks up the materials to be loaded into the mixer, the driver must be able to manipulate the drum under the hoppers that dispense the cement, gravel, sand and water into it. She has to understand the mixing procedure and adjust the speeds on the mixer accordingly. The driver must know what materials should be in the blend and check the work order to ensure she is picking up the appropriate mixture.
  

Job Duties

• This position requires the driver to make deliveries on time, as other construction crews are depending on her punctuality to keep the project on schedule. She must be agile and self-confident in operating the levers and chutes to properly and evenly dispense the mixture into the prepared frame or opening. The maintenance of the truck is also her responsibility. She may regularly spray the truck and mixer exteriors with a non-stick agent to prevent concrete build up or wash them after each delivery to remove concrete spills and splashes.
  

Working Conditions

• The environments in which a concrete mixer truck driver work are generally dusty and dirty. The dry materials she picks up create a dusty atmosphere. The job sites are typically in various stages of construction and full of dirt, mud, gravel and construction equipment and materials. The driver must be strong and in good physical condition to safely operate the truck’s equipment and properly clean the truck. A valid driver’s license and clean driving record are required for this job.
  

Educational Requirements

• A high school diploma or equivalent is required to qualify for this job. Knowledge of trucks and mixing equipment is considered a plus for applicants. Demonstrated mechanical abilities utilized in past jobs are helpful.
  

Salary and Advancement Opportunities

• Chances for advancement in this position are rare in small companies. In large companies, drivers may aspire to fleet or account management positions. The median salary for heavy truck and tractor-trailer drivers such as concrete truck drivers was $38,200 in 2012, according to the U.S. Bureau of Labor Statistics.

How Porcelain Tiles Are Made

Types of Tiles

• Most tiles made of clay or clay mixture are ceramic tiles. Within that classification, there are porcelain and non-porcelain tiles. Porcelain tile uses dust pressed under high pressure and other special techniques that differ from ceramic tile. These methods make porcelain more durable, finer grained and less absorptive than its non-porcelain counterpart, normally called ceramic tile. Porcelain tile starts with a combination of quartz or silica, clay and feldspar or flint. The clay contains a minimal amount of impurities and has an ample amount of kaolinite. The major difference is the water absorbing ability when finished. It must be less than 0.5 percent.
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• Crushing

• The manufacturers select the combination of the primary ingredients and use the proportions they need for the green, unfired mixtures to get the qualities they want in the final product. The materials are crushed using several machines. The jaw crusher has metal jaws which swing to crush the bigger pieces. Those pieces then go to a hammer mill that reduces them to less than 0.1 inch by pounding them with a succession of moving steel hammers. The final grinding stage uses the ball mill that grinds the particles inside a rotating cylinder.
  
  

Washing

• While the machines crush most of the rocks finely, it doesn't do them all or remove impurities. In order to remove larger pieces and undersized pieces, the material gets a shaking. The ground rocks are put on a series of sloped screens which mechanically vibrate to shake the smaller particles out and leave the larger ones on the screens. Other mixers remove any excess iron from the dry powder.
  
  

Forming

• The most accepted method for creating porcelain tile from the crushed material is pressing. The machine presses and shapes the tile into flexible molds or rigid die. There are uniaxial pressers that create pressure from one direction or isostaic pressers that keep the pressure equal on all sides.
  
  

Bisque Firing and Glaze

• Bisque firing occurs first if the porcelain is to receive a glaze. It fires the porcelain at lower temperature and vaporizes the contaminants. It also reduces any shrinkage later. The next step involves the application of a glaze, which is normally a combination of silica, alumina and calcia. For a matte glaze, the silica is decreased and the alumina increased. If the porcelain is unglazed, the manufacturer omits these steps.
  
  

Final Firing

• The porcelain then travels through a long tunnel kiln. There are temperature zones throughout so that it first preheats the ceramic tile and then moves it to the main firing area where it burns out impurities and the materials bond. The last area of the kiln is the area where the tile cools before it's packaged.

Some Concrete Batching Plant Equipment Related Features

Demolition concrete batching plant will encounter a lot of related equipment, and only after we understand these devices to know a number of things how correct handling the demolition, and after installation so forth. Today, we start to understand some of the relevant characteristics of the overall device.

Concrete batching plant equipment is a mixing console, material weighing system, material handling systems, material storage system, the control system of the five components of the system and other ancillary facilities consisting of building materials manufacturing equipment, and its main job is to cement the principle of cementing material, The sand, lime, cinders and other raw materials were mixed and stirred, and finally made into concrete, as the wall material into the construction of production. Concrete batching plant since been put into use in China's building materials industry has played an important role, of course, this is also the concrete batching plant itself has superior characteristics of the decision.Concrete batching plant equipment is divided into sand feed, powder feed, water and feed additives, transmission stirring with four parts storage, equipment Tongshen overall steel casting, high-quality H-beams not only look beautiful, but also enhance the overall structural strength of concrete batching plant equipment easy to install, it can be applied to a variety of complex terrain structures.Concrete batching plant equipment with good stirring performance, the device uses a spiral twin-shaft forced mixing console, not only the mixer can be strong, to dry hard, plastic and various proportions of concrete are able to achieve a good mixing effect. Stir and high efficiency.Concrete batching plant equipment not only has excellent mixing console, also has a variety of sophisticated accessories, such as screw conveyor, metering sensors, pneumatic components, these components ensure that the concrete batching plant during operation with high reliability, precise measurement skills and long service life. At the same time, concrete batching plant all maintenance parts are seized with a catwalk or ladder, and has enough room to maneuver, mixing console can be equipped with high-pressure automatic cleaning system has a function starvation and over-temperature alarm function, easy to equipment maintenance.Concrete batching plant equipment has a good environmental performance, the machine running the process, powder manipulation are within the full blockade of the system, high-efficiency dust collector tank pink / mist spray and other methods greatly reduce the dust pollution of the environment, while concrete batching plant for pneumatic systems and unloading equipment are used exhaust muffler device effectively reduces noise pollution.Demolition concrete batching plant must not damage these devices, known mixing station equipment these features, we also can be handy in the demolition of more time, and we can more fully use these devices in the future use of the process.

Building hoist installation and operating skills

Building hoist installation location requirements:
1. The erection of shed operations and ensure that operators can see the commanding officer and drag or lift objects. During the construction of buildings, scaffolding and field stacked materials, components, etc., should not affect the driver within the operating range of the whole process of monitoring. Is within the danger area of ​​operations shed jobs, the top should be consistent with the requirements of protective shed.
2. The foundation strong. Building hoist should be kept away from dangerous work area, select a higher terrain, soil sturdy place, buried anchor with rope and winch seat securely latched front should piling, control hoist movement and overturning.
3. roll direction. Roll with the guide pulley center on the positive, from the roll to the first guide pulley distance, according to regulations are: the grooved drum should be greater than 15 times the width of the roll, no slot reel should be more than 20 times, to prevent roll cylinder operation when the stack and the guide rope mutual wrong wheel flange and rope wear.

Building hoist operations staff of professional responsibility and Handling Precautions
1. Building hoist driver shall be subject to professional training certificates, to concentrate at work, we found that when there are obstacles in sight, should be promptly removed, may not operate when the signal is unclear.
2. The operation should be preceded by idling confirm electrical, brake and environmental conditions to operate well, the operator should learn more about the main content and workload duty jobs.
3. When hanging objects do not fall entirely on the ground, the driver can not leave their posts. Rest or pause job, objects or cage must be lowered to the ground. After work, it should cut off the power, shut the gates box.
The driver should always pay attention to the operating conditions and the wear of the rope. When the load changes in the first upgrade, we should pause 0.5m off the ground, and then continue to rise while checking no problem.
5. Use the monocular construction hoist, you must use the brake control the rate of decline, not too fast and fierce braking to slow down.
6. prohibit the use of pull-type switch to prevent the collision misuse.
7. Apply grease rope regularly and want to hang on a dedicated slot to prevent rolling strife, undermine the strength of the rope.
8. construction hoist rated higher than 125KN pull rope row should be set, should the rope on the reel should be kept at least 3 to 5 times, the end of the rope should be secured and reliable.
9. reel rope outside to the outermost distance should not be less than 1.5 times the diameter of wire rope
10. The operation, no person shall cross the winch rope is jobs.

What are the advantages of fine aggregate concrete pump?

Concrete pump is currently a lot of the construction side are commonly used as a mechanical device, it can greatly enhance the transport efficiency of concrete. The fine aggregate concrete pump as a special model, but also by the majority of the construction side. So Intel Wuhan fine concrete pumps have what advantage?
At present, many projects are often used to warm the fine aggregate concrete pump fine stone concrete or mortar filling layer filling layer large area, high efficiency of construction, and want to ensure the smooth progress of the project, the purchase of a high-quality fine aggregate concrete pumps can play a multiplier Effect. Specifically, we are now described below.

As a production and sales company specializing in the production of concrete pumps, fine concrete pumps currently has three characteristics: 1, fine aggregate concrete pump high power operation, small loss. 2, fine aggregate concrete pump flow components relatively long service life, saving production costs. 3, the entire mining system stable jobs, not because of pump operation doubt affect the operation of the entire mining system.

How scrap processing tower crane

Tower cranes, in the above construction machienry, crane plays a vital role. Since China Housing Industry rapid outbreak began, but also started a flourishing crane industry, as of 2007, half the world's total number of cranes are located in China, which also makes China become a country worthy of the crane. However, in the jungle so many crane operations, there are still a large number of crane belongs to the ultra-service phenomenon, which also brings great risks to construction safety.

    In fact, national and industry-related regulations have already pointed out many times, before and after installation and tower cranes in daily use should it be checked. Every weld metal structure can not be cracked, the metal structure can not be plastically deformed connecting bolt, pin quality to meet the requirements, the only retreat, locking measures, connecting bolt preload to regularly scheduled staff, wire rope lubrication and maintenance is good, broken wires may not be exceeded never allow off shares can not be plastically deformed joints Shengka standard, gearbox and fuel tanks must not leak, the hydraulic system pressure is normal, brake and limit the insurance sensitive and reliable transmission mechanism oiled, complete and reliable safety device, the electrical control circuit insulation is good. In particular, to supervise the tower crane drivers, maintenance electrician and mechanical maintenance man should always check inspection should focus on the vulnerability of the rope, hook, each transmission parts, limiting safety devices, found the problem dealt with immediately, so be people, fixed time, fixed measures to strictly prevent mechanical work sick.
    When crane time more than a decade, should inform the technical appraisal units identified by the use of units, if not to ensure the safety, then it should be done in scrap. In particular, some large crane, it is an order prohibiting the use of the State. There is a tower crane in the period of use, if the tower and front arm appear distorted. Living Steel closed and serious cases, should be scrapped ahead of schedule. Scrapped after dismantling the tower crane should as soon as possible to recover useful parts, made of metallic materials is an integral part of smashed recycled process, after some covet petty scrapped sent renovated tower crane rental market behavior, the same should be carefully investigation.

How to Calculate a Belt Conveyor

Conveyors can move a load both horizontally and vertically. To calculate the conveyor belt's power requirements, you have to consider both how far the load must move linearly and by how much a lifting motor will raise it. No universal formula links these variables to how much power the belt consumes. Manufacturers instead provide in the system documentation graphs or tables of data for you to consult for such calculations.

Instructions

1. Convert the horizontal transport distance to meters by multiplying it by 0.304. If, for instance, the belt must move material 260 feet horizontally: 260 x 0.304 = 79 meters.
2. Convert your hourly freight to metric tonnes by multiplying it by 0.907. If, for instance, the conveyor belt must move 330 tons each hour: 330 x 0.907 = 300 tonnes per hour.
3. Track the values from Steps 1 and 2 on the graph from the link in Resources. With this example, locate the 79 mark on the x-axis and note its intersection with the 300 tonnes per hour curve. The value on the y-axis, in this case 6, describes the horizontal conveyor motor's power requirements in kilowatts.
4. Convert the load's lifting height to meters by multiplying it by 0.304. If, for instance, the belt raises material by 40 feet: 40 x 0.304 = 12.16 meters.
5. Track the value from Step 4 on the second graph in the link in Resources. With this example, find 12 on the x-axis, and note its intersection with the 300 tonnes per hour curve. The y-axis value reveals an additional power requirement of 10 kilowatts.
6. Add together the power requirements from Steps 3 and 5: 6 + 10 = 16 kilowatts of total power.

Building Hoist construction

Building hoist is a work using a cage (cage) vertically along the guide rail rack (or inclination) used to transport personnel and materials movement machinery.

The structure is a building hoist cage carrying ladders and counterweight, wire rope hanging in the column at the top of the fixed pulley, columns and architectural structures rigidly connected. Ladder cages electrically driven gear, with a reaction force on the fixed rack uprights, ladder cage rails for vertical movement along the column. Its columns made into a standard section length of the upper and lower sections can be interchanged according to the required height to the construction site for assembly, generally erected up lOOm, for up to 200m at high-rise building construction. Elevator can be installed by means of its own electric boom assembly at the top of the construction site can also use the crane and other lifting equipment assembly. In addition, as the ladder cage and counterweight are arranged symmetrically, so overturning moment is very small, the column passed mural firmly connected with the building structure, so reasonable and reliable force.

Several important stage when used concrete mixer truck

Concrete mixer growth process

4 to 6 years of concrete mixer "Menopause"

Spend 4-6 years, concrete mixers, has gradually into the "menopause", as people enter the "Menopause" angry love, as in "Menopause," the concrete mixer, the point of the question is a common practice, as many parts of the car are start aging, often showing oil spills, leaks, small problems is endless. Savvy owners will take advantage of the beginning of the transfer period, the car of this period both to a better price, but also those of all the training and preparation of the problem is about showing others.

Concrete mixer 6 to 10 years of "old age period"

Concrete mixer at this stage, like six or seven year-old man, "three hundred sixty-nine illness, ailment every day", the car of this period, anything can be bad have been bad over the center. During this period, the owner is necessary to enhance the conservation of concrete mixer, regularly change wearing parts, the owner needs frequent repair station or conservation center to check the condition after the car out of the bus in front and take all necessary to do a routine inspection and maintenance work.

10 to 15 years concrete mixer "risk period"

Concrete during 10-15 years, will be in a "risk period" at any time "dying," the risk. Concrete mixer this period, it is best to stay in the garage owners convalescence, or sent directly to the waste station to sell scrap metal.

SPALLED CONCRETE DRIVEWAY - FIXING SPALLING ISSUES

What caused this surface failure on my integrally colored concrete driveway, and what can I do to repair it? The driveway is 6 years old and 1,000 square feet in size, but only a few hundred square feet directly in front of the garage doors show signs of failure.

This type of surface failure, known as spalling or scaling, is more common in colder climates where freeze-thaw cycles and deicing chemicals are prevalent. Freezing causes the water in the capillaries of the concrete to expand, creating pressure. Over time, the expansive pressure from repeated cycles of freezing and thawing can break away the top surface of the concrete machinery, leaving pit marks and exposing the coarse aggregate. Deicing chemicals only aggravate the already-stressed concrete by allowing more water to migrate into the concrete, thus increasing the size and depth of the spalling failures when a freeze occurs. That's why the problem occurred only in front of the garage, where the cars are often parked. Deicing chemicals picked up from the road dripped onto the surface, allowing water to permeate that area.
On new concrete, you can dramatically reduce water-induced spalling by applying a penetrating waterproofing sealer 28 days after concrete placement and every few years thereafter. To address the problem after it has occurred requires covering the entire affected area with a polymer-modified cementitious overlay in a color matching the existing driveway. Once the overlay cures, apply a waterproofing sealer to prevent the problem from reoccurring.

How to Mix Concrete in a Mixer

A portable concrete mixer provides an economical solution for do-it-yourself concrete projects. A mixer eliminates the need for backbreaking manual labor to mix up small batches of concrete. Both electric and gasoline-fueled mixers may be rented out by the hour or day. The equipment can be rolled right on site to build the slab for a garden shed or walkway

Instructions

1. Roll the cement mixer onto level ground near the place the finished concrete will be spread. Lock the wheel brakes. Extend and lock the stabilizing legs (if the mixer has them) into place.
2. Tip the barrel to the 45 degree up-angled position. Click the position lock into place.
3. Dump bagged cement mix into the mixer barrel. Use one bag at a time unless otherwise permitted by the specific mixer instruction sheet. Add sand to the mixer barrel in the proportion listed on the cement bag.
4. Plug the heavy-duty three-pronged electrical extension cord into the mixer plug receptacle. Plug the other end of the cord into a live electrical outlet. For gasoline-powered mixers, fill the mixer tank with gas and twist the gas cap tightly closed.
5. Turn the mixer on to the lowest setting. Allow it to run until the sand and cement are well combined. Turn the mixer speed up to a medium setting. Pour in the volume of water indicated on the cement bag label. Use a bucket to add the water in a steady stream as the mixer continues turning.
6. Switch the mixer off when all ingredients are completely combined. The mix should be slightly soupy without any dry clumps. Release the barrel lock and tip the concrete out into a wheelbarrow.
7. Clean the mixer immediately before concrete can harden on its surfaces. Unplug the equipment and then hose it off with a strong stream of water.