Core Cutting Grinding The Ends Of Concrete Cylinders And Cores

PROCEDURE

This procedure mainly gives instructions about the preparation of cores and concrete cylinders for testing the modulus elasticity, tensile strength and compressive strength utilizing the Core Cutting and grinding machine given at the end. The procedure is being utilized for concrete comprehensive strength for up to the value of 2000 psi. Further, Cutting and grinding of the concrete using lesser strength can result in damaging the samples. Student Responsibilities

  • Read for requirements of this procedure
  • Provide concrete samples for grinding of concrete
  • Clean-up of the machine for the use after
Staff Responsibilities
  • Read for the requirements of this procedure
  • Assist for user needed
  • Replace the grinding wheel when necessary requirements
EQUIPMENT and TOOLS

Our equipment and tools for the Concrete Cylinder End Cutting and Grinding Machine

MATERIALS

We used for concrete materials like Cylinders, Cores, or Both

PERSONAL Safety EQUIPMENT

We used for personal protective like safety glasses , safety shoes and gloves

DETAILED PROCEDURE
Prepare the end grinder for use

There are many processes described within Section should have been performed after the previous user completed his or her use. Failure to clean the machine after use by a previous user does not excuse the current user form responsibility to clean the machine after his or her use.

Clean the water pump and pipe line from the water reservoir

Se-test pump can be found by following the power cord and water line. Once located remove the pump firm the reservoir and set it aside in a safe place. Se-test pump may be buried and submerged in concrete grit if the grinding of the concrete machine was not cleaned by a previous user.

Refill the reservoir to the end grinder machine

Refill and return the reservoir to the end Core cutting & grinding machine to fill the machine with approximately halfway with fresh water.

Clean then return the submersible pump for the reservoir

If the pump has been submerged in wet concrete cuttings, the impeller may be clogged. To check for a clog, unplug the electrical connection to the pump from the back of the end grinding machine and plug it into an ordinary wall outlet. The pump should begin spinning immediately. Concrete cylinder end Core cutting & grinding machine does not, unplug the pump gently clean the dust from the impeller and water intake. Once the impeller is spinning normally, return the electrical connection to the back of the end grinding machine and place the pump in the reservoir.

Insert the concrete samples into the carousel

Concrete cylinder end Core cutting & grinding machine Identify which diameter 4/ 6 inch of cylinders or cores is to be ground.

Ensure the proper cylinder carousel installed grinder machine

The end grinder can grind 4/ 6 inch diameter samples. Carousel can be changed to accommodate the appropriate size. The typical sample size within 4 inch. If the cylinder carousel needs to be changed to accommodate a 6 inch.

Lift the lid to the grinding compartment

For safety, ensure that the machine is in “OFF” mode, but pressing the red button, so that power cannot accidentally be turned on when the lid is open. Install samples by sliding one sample into the top station and making sure to push the sample all the way to the back stop.

Lock the sample into place with the cam using 7 or 8 inch wrench

Torque sample with approximately 20-30 ft-lbs. on hex cam bolt, (which creates a clamping force of 500 lbs. on the sample). It is extremely important that the cylinders be securely locked in the carousel. Cylinders carousel movement will affect the final plainness of the samples. After finally securing the locking nut, give the wrench a final tap with your hand or small rubber mallet.

Rotate the carousel by hand to load cylinders machine

Install samples by sliding one sample into the top station and making sure to push the sample all the way to the back stop. Torque sample with approximately 20-30 ft-lbs. on hex cam bolt, (which creates a clamping force of 500 lbs. on the sample). It is extremely important that the cylinders be securely locked in the carousel. Cylinders carousel movement will affect the final plainness of the samples.

Start the grinding process

The machine will automatically process the ends of the cylinders or cores and stop at end of cycle. The cycle is completed when the yellow light is off and the grinding head has returned to its “home” position. After the motors have switched off, you can open the lid. DO NOT OPEN THE LID UNTIL THE

YELLOW LIGHT TURNS OFF

Cutting water helps lubricate the grinding check that the water pump is cycling water through the grinding compartment. After the grinding cycle has started, ensure that water is flowing out of the tube from the lower portion of the grinding compartment into the reservoir. If water is not flowing, check the pump and its impeller per the recommendations of.

Inspect the ground end of cylinder

If the freshly ground end is does not have aggregate that is uniformly visible over the entire surface, the grinding cycle may need to be repeated on that end. Install samples by sliding one sample into the top station and making sure to push the sample all the way to the back stop.

Grind the opposite end of the cylinder or core machine

Insert the concrete samples into the carousel. Grind the ends of the samples.

Clean the end Core Cutting and grinding machine

Concrete cylinder end Core cutting & grinding machine using a water hose, rinse the grinding dust and debris from the grinding compartment into the reservoir. It is important to clean the machine after each use, as deposits will build up inside the grinding wheel, enclosure, and lid. The wheel will build up deposits and cause vibration due to imbalance if not properly cleaned.

Locate and remove the pump from the water reservoir

The pump can be found by following the power cord. Once located remove the pump from the reservoir and set it aside in a safe place.

Return the reservoir to the end Core Cutting and grinding machine

If the end Core Cutting and grinding machine is not going to be used in the near future, the reservoir can be left empty for the next user. To grind the ends of cores and concrete cylinders, user should first understand requirements that the procedure has. They should properly provide the samples for the purpose of grinding and should clean the machine after using it.

The staff on the other hand should have proper knowledge about the requirements of the procedure. Moreover, they should assist the students as and when required and should also replace the grinding wheel as and when required.

To facilitate the procedure concrete cylinder end grinding machine 7/8 in wrench is required. Alongside, concrete samples for cores and cylinders are also required. Gloves, safety glasses and safety shoes are some other basic requirements.

Following is the procedure for grinding the core and concrete cylinder ends:
  • First locate the water pump and then remove it from the reservoir.
  • Now from the water reservoir empty the residual debris and concrete dust.
  • Refill the reservoir till the end of the grinding machine.
  • Put the concrete samples into the carousel
  • Now, simply rotate the carousel manually for loading the extra cylinders or cores.
  • Further, close the lid of the grinding compartment.
  • Now, finally grind the opposite ends of the cylinder and the core.
SUPPORTING DOCUMENTS

Preparation of cores and concrete cylinders none.

REFERENCED DOCUMENTS

The grind the ends of cores and concrete cylinders Installation and Operation of the Diam-End Grinder.

Written by:- civillabequipment for Concrete