Why do some sealers always wear so well?

Seal coating Milwaukee, Commercial Seal Coating, Waukesha Seal Coating, sealcoating

Knowing how sealer is produced can help you understand why some jobs and even some areas within the same job wear much differently.

Sealer having a small tar (or other resin) particle size makes a big difference in entrances, turns and areas subject to standing water.

The method used to produce pavement sealer has everything to do with it. This is true for refined tar, petroleum resin or asphalt based sealers. Ideally, resin particles should be between 3 and 10 microns in size and evenly distributed throughout the emulsion.

Small, evenly dispersed resin particles assure that the coating is most effectively able to adhere to the pavement surface, uniformly coat aggregate and form a dense, waterproof film. These characteristics are critical to wear resistance, particularly when the finished surface is often wet. Optimal particle size for resins in clay stabilized emulsion systems like pavement sealer is 3 to 10 microns.

The manufacturing method, and the mechanical energy it generates, is the greatest factor in achieving small, evenly distributed resin particle size.

A colloid mill consists of a series of stationary, grooved chambers called stators. A series of heavy, sharp edged rotors turn within the stators at very close tolerance and very high speed, typically close to 2,000 rpm. The resin and other components of emulsion sealer are forced through the mill under pressure. This imparts tremendous mechanical energy, resulting continuously in a finished product with 100% of resin particles evenly dispersed and well within the 3 to 10 micron desired range for size.  Batch mixing utilizes sets of paddles which stir the contents of a vertical or horizontal mixing tank at relatively low speed. It is a low shear process which does not generate sufficient mechanical energy to achieve the same result.

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Gate & Gate Operator Issues In Cold Weather/Snow

Gate operators, milwaukee, Gates, security gates

Old Man Winter has finally arrived so it’s a good time for us to remind you of maintenance and troubleshooting for gates and gate operators to save you a service call.

SWING GATES
Be sure to shovel any snow clear to the ground for the travel path of the gate and a few feet beyond.  This will make opening and closing the gate much easier.  Forcing the gate thru the snow puts additional stress on the gate frame as well as the hinges.

SLIDE GATES
Same as above.  Make sure to shovel a path behind the gate to the ground or below the snow line for the entire opening of the gate.  Make sure the rollers have not frozen up and are freely moving.

GATE OPERATORS
When snow has not been cleared and the operator is forced to open the gate through the snow the operator may sense an obstruction and shut down.  Make sure to shovel and clear the snow.  Also brush any snow off gate operators, the gates themselves (to reduce weight and/or wind load from frozen snow) and any photo eyes and gate rollers.

This guy actually uses a blower to clear this gate rollers and path of travel under the gate to keep things clear.   https://www.youtube.com/watch?v=oCfLpqpQWvM

Gate operators, milwaukee, Gates, security gates

 

 

SUB ZERO TEMPERATURES
In extremely cold weather when the temperatures are close to zero and windchills are well below – gate operators will have issues.  Even with heater kits there are a few days occasionally in our Wisconsin winters where it’s just too cold to be effective.  If your operator shuts down or is not functional it just may need to be warmed up.  At Munson we’ve had the situation where the sun shines on the black operator box in these temperatures keeping it warm, but once the sun sets the operator cools and has issues.  Most common issues with cold weather and gate operators are:

  • Slower to open
  • Consistently only opens after multiple attempts
  • Movement is choppy or sporadic
  • Squeaking or other new sounds
  • Stays open, won’t close

The last item is the most common of our services calls (besides not shoveling a path for snow).  The long term solution is the operator just needs to warm up.  Unfortunately this does not work when a facility needs to be secure so the temporary solution is to power off the operator and manually close it.  Then chain and lock if required.  One other cold weather troubleshooting item for slide gates is to check that the rollers are not frozen, nor the operator chain to the gears if an operator is involved.

FINALLY DON’T FORGET TO TURN OFF POWER TO GATE OPERATORS 
WHEN WORKING ON CLEARING SNOW IN OR AROUND THE GATES!

fencing, fences, Milwaukee, waukesha

Munson, Inc.
6747 N. Sidney Place • Glendale, Wisconsin  53209
Phone: 800.236.0340 • Email: rob@munsoninc.com

 

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Most damage to pavements is caused by freeze-thaw cycles

asphalt repair, Milwaukee, Potholes, Parking lot repair

A freeze-thaw cycle is when the temperature fluctuates from above freezing (32F), to below freezing, and then back to above freezing.  When temperatures are above freezing, rainwater or snow melt will make its way into any small crack in the pavement. Then, as temperatures drop below freezing, the water within the cracked pavement begins to freeze and expand, causing the crack to expand and grow as well.  Warmer weather re-melts the ice, allowing the water to move deeper into the newly expanded crack, only to freeze and expand again during the next cycle.  Water underneath the pavement is meant to drain away, but during winter it freezes in the base and subgrade materials. Water freezing below the pavement can sometimes cause frost heave to occur.  Frost heave occurs when water is allowed to freeze and expand in large chunks The material above these chunks is heaved upward deforming the pavement.  When warmer weather comes, the ice begins to melt, weaking the base layer and leaving voids where the chunks were formed.  Eventually, potholes will then quickly appear.

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Driveway Maintenance In The Winter

Munson Inc, Milwaukee Asphalt, Sealcoating, Milwaukee

How do you maintain your driveway so it lasts longest and isn’t damaged during the winter?

Although we have not gotten much snow yet this year, we all know that snow and ice is inevitable.  Whether you shovel or use a snow blower is up to you, as both have pros and cons. However, after the snow is removed from your walkways and driveways, be sure to analyze the pavement to determine if further deicing is necessary.  Avoid using rock salt (sodium chloride) to deice and instead opt for calcium chloride, potassium chloride, calcium magnesium acetate or natural deicers. Conventional rock salt has been linked to the premature corrosion of pavement.  The alternatives on this list work in lower temperatures and are less harmful to the pavement.  Applying sand to your driveway can enhance traction in your driveway and walkways and is also a safer alternative to rock salt.

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