Utilization of Laser screed technology in present scenario.

1. Laser Screed Technology
.
BIRLA
VISHVAKARMA
MAHAVIDHYALAYA
Prepared By:
HARDIK B LOKHANDWALA
ENROLLMENT NO: 13CM119
FIRST SEMESTER
Guide By:
PROF. JAYESHKUMAR R. PITRODA
ASSISTANT PROFESSOR & RESEARCH SCHOLAR
CIVIL ENGINEERING DEPARTMENT
B.V.M ENGINEERING COLLEGE
V.V.NAGAR
M.E. [ CONSTRUCTION
ENGINEERING & MANAGEMENT ]
CONSTRUCTION TECHNIQUES (711402)
GUJARAT
TECHNOLOGICAL
UNIVERSITY

2. • Introduction Of Laser Screed
Technology
• How this technology works?
• Types of Laser Screed products
• Difference between Manual
screeding and Laser screeding
• Case Study
• The benefits of Laser Screed
• Limitations of Laser Screed
• Acknowledgment
• References
Contents

3. Laser Screed Technology
 Screed is a flat board, or a
aluminium tool, used to
smooth concrete after it
has been placed on a
surface. Also used to assist
in levelling the application
of plaster.

4. Introduction
 The introduction of the Laser Screed machine coincided(happen
simultaneously) with increased demands for flatter and more level
industrial/warehouse floors. Laser screed technology produces slab-
on-grade concrete floors that are flatter and stronger than any
comparative floors produced by using conventional methods. They
establish grade by laser, utilizing a 3D profiler system, disperse
concrete by auger, and then vibrate and consolidate the concrete.
 Laser Screeds are setting new standards for concrete floors. In
addition to being laser, this technology is precise and mechanically
powerful, they are fast. It can accurately screed 240 square feet of
concrete in just 60 seconds. That means more floor is placed daily
and production schedules are satisfied or actually shortened.

6. How this technology works?
 The laser screed machine has four wheel drive, four wheel steer and is
operated by one person seated at a point of maximum visibility. It
utilizes a 360° rotating platform with a telescopic boom. The end of
the boom is a screed head that is a plough and auger that cuts the
concrete to level and a vibrating beam to compact the material.
 The screed head boasts a laser-guided, automatic control
system. This system allows the machine to accurately place and finish
concrete to the exact level and finish specified. There are 2 receivers
on the screed head, that receive signals from the static laser
transmitter which provides a constant reference to the datum
level. This transmitted signal functions to automatically adjust the
hydraulic cylinders that guide the screed head.
 At the commencement of a pour, the wet material is poured onto the
slab area from the supplier’s delivery truck. Once material placement
has begun the laser screed is mobilized into position. At his point the
telescopic boom extends over the concrete, manoeuvring the head
to the start position. As the boom retracts(pull towards center) it
compacts and levels the material, producing a flawlessly flat slab. This
process allows for consistent material delivery, across a vast surface
area, in a minimal time frame.

7. Working Of Laser Screeding

8. Somero Enterprises,Inc
 The Somero Laser Screed® concrete screeding machine was
developed in the mid 1980s based on patented technology to
provide a highly accurate, mechanical method of screeding
concrete for slab-on-grade floors.
 Somero successfully launched different types of Laser Screed
products whcich are enlisted below.
 S-15m LASER SCREED
 S-840 LASER SCREED concrete leveling equipment
 SXP®-D LASER SCREED concrete leveling equipment
 Mini Screed
 Mini Screed C
 3-D Profiler System
 CopperHead
 PowerRake
 HoseHog
 STS-132 Topping Spreader

9. Specifications
 The S-15m Laser Screed ® concrete levelling machine screeds
15m2 (160 sf) per pass with a 6m (20') telescopic boom reaching out over
the concrete.
 Quick and easy setup
 Screed up to 460 m²/hour
 One person operation. It
does the work of 5 men
compared to conventional
crews.
 Improved floor levelness.
 Automatic soft landing,
column block protection,
self-levelling heads, auger
and vibrator on/off.
 On board display screen.

10. Specifications
 S-840 Laser Screed has 6’ or 8’ head option to
increase productivity.
 Increases Laser Screed
utilization.
 Screeds up to 5000
square feet/hour
 Offset auger head
design allows for a one
man operation.
 New control system
allows faster elevation.
 Proportional valving.
 Live calibration

11. Specifications
 Full-time electrical system diagnostics - alerts the operator instantly
should an electrical fault occur within wires, switches, etc., and
suggests a fault location.
 Full-time hydraulic
system diagnostics -
provides hydraulic
system information
to the operator
 Full-time engine
performance
diagnostics
 Auto stabilizers
 Operator-adjustable

12. Specifications
 Laser-controlled accuracy.
 Screeds to higher tolerance than conventional methods.
 Works well with various slump and mix designs.
 Better concrete
consolidation than
hand-held vibratory
screeds.
 Lightweight and
easy manoeuvrability.
 Easy set-up, breakdown
and transports
easily in the back
of a pickup truck.
 Single and dual slope capabilities.
 Saves time and money.

13. Specifications
 The CopperHead XD uses Somero's patented laser leveling technology to
cut the concrete to a finished grade, screed it flat, and vibrate it smooth
in one pass.
 It will work faster because the CopperHead XD sets grade automatically,
allowing the operator
to move quickly and
efficiently through the work
area.
 The CopperHead XD's
compact and lightweight
design insures ease of
operation.
 The hydraulic drive motors
keep the XD pulling low slump
concrete and riding smoothly over
chaired rebar and other obstacles.

14. Specifications
 PowerRake 3 has optional auger screed head which gives even more
versatility on the jobsite.
 One man screeding operation
 Reduction in manpower
when screeding concrete
to finish grade.
 Better accuracy and
consolidation than
traditional methods.
 Ability to handle low
slump concrete
consistently.
 Extremely maneuverable.
 Productivity - 3,000 sq. ft. and above.

15. Specifications
 The HoseHog is a unique combination of advanced technology and old
fashion horsepower that removes the back-breaking and extremely
labour-intensive task of dragging concrete hose either on elevated deck
or slab on grade.
 increase productivity
20-30%.
 Labor Savings
 Reduce Job-Site Injuries

16. Specifications
 This completely redesigned Topping Spreader allows you to accurately
and efficiently spread dry shake toppings on concrete floors and slabs.
 The new STS-132 gives the
freedom to pour any width,
shape or size, cutting loose
from the limitations of
conventional spreaders.
 The high level of
maneuverability allows to do
easily work closely around
columns and other
obstructions.
 Save time and labor
 new electronic joystick controls,
automatic feed system, computer
adjustable parameters, and increased capacity.

17. Difference between Manual screeding
and Laser screeding
Manual
Screeding/Rodding
Lots of forward bending causes awkward
torso posture 79% of the time
Holding the “rod” (2” x 4” board) requires
a pinch grip with extreme wrist flexion.
Repetitive hand/arm activity
High hand forces are required to pull the
“rod” to smooth the concrete.
Relatively slower than Laser screed
machine
CopperHead Laser
Screed
The design allows for an upright posture
95% of the time
Pinch grips and wrist flexion are
eliminated.
Hand arm repetition is reduced
Very low push/pull force required
much faster than manual rodding with
better quality screed.

18. Case study
 A report was presented by GLENN A. SHEPHARD on “LASER
TECHNOLOGIES APPLICATION TO CONSTRUCTION” to the
Graduate Committee of the Department Civil Engineering in
Partial Fulfillment of the Requirements for the Degree of Master
of Civil Engineering, University of Florida ,Summer 1999.
 In this case study ,the application of Laser screed technology
was described briefly and its comparison to hand screeding was
also notified in report given by GLENN A. SHEPHARD
 Research includes Figures 1 and 2 illustrate floor flatness (FF)
measured in inches over the plane surface in yards. While the
floor profile deviations of 1/2-inch over 10 yards for a hand
screed floor appear to be insignificant.

19. Figure 1. Hand Screed Floor Profile - deviation in inches
over plane measurement in yards. (Laser Screed Ltd., 1999)
Figure 2. Laser Screed Floor Profile - deviation in inches
over plane measurement in yards. (Laser Screed Ltd., 1999)

20. The benefits of Laser Screed Technology
 Faster placement - Laser Screed machines can accurately
level 240 square feet of concrete in less than one minute. It
easily moves around obstacles on the jobsite and eliminates
most framework, meaning more floor or paving is placed daily
and production schedules are satisfied or actually
shortened. Fast-track production, high quality, and cost
effectiveness are all direct benefits of utilizing Laser Screed.
 Flatter floors – we can achieve laser-precise flatness and
levelness every time. Floors are routinely flatter, stronger, and
more level than floors produced with any other conventional
method.
 Fewer workers – The Laser Screed equipments does the tough,
strenuous (effortful) work, so we simply get more work done
with less manual effort, allowing to make larger daily
placements with fewer workers.

21. To be continued …..
 Produces floors of unequalled flatness & levelness
 Reduces labour costs due to faster placing times
and reduced form work
 Increases productivity & efficiency
 Assures greater accuracy through Laser Technology
 Easily places 3”-4” slump concrete, larger aggregate mixes,
and fibrous concrete
 Concrete is levelled and compacted in one operation,
 producing high strength, dense, durable floors
 Improves floor quality & increases profits

22. Limitations of Laser Screed Technology
 The most significant limitation to using the laser screed is that it
is only practical for larger jobs ( more than 50,000 ft²)
 Other limitations are primarily related to the laser sreed’s size
and weigh. A fairly large door is needed, and light
reinforcement will not carry up to the machine’s weight.

23. References
 Ravindra K Dhir, Peter C. Hewlett “Concrete in the Service of
Mankind: Radical concrete technology, Volume 4” k,E & FN
SPON Publication.
 GLENN A. SHEPHARD, 'LASER TECHNOLOGIES APPLICATION TO
CONSTRUCTION'A Report Presented to the Graduate
Committee of the Department Civil Engineering in Partial
Fulfillment of the Requirements for the Degree of Master of Civil
Engineering, University of Florida ,Summer 1999
 www.amanabuildings.com/resources/laser-screed
 www.aquariustech.net/LaserScreed.html
 www.cogriasia.com/laser-screed-floor-construction/Laser-
screed-floors/
 www.engineeringnews.co.za/article/laser-screed-equipment-
range-achieves-flat-industrial-concrete-floors-2012-04-06
 www.somero.com/product
 en.wikipedia.org/wiki/Screed/

24.  pmallam.dns-systems.net/ajclark/flooring.htm
 techniconconstruction.com/services/1-column/

25. Acknowledgement
 DR. F. S. Umrigar, Principal, B.V.M. Engineering college, Prof. J.
J. Bhavsar, Associate Prof., PG co-ordinator, cvil engineering
department, B.V.M. Engineering college Vallabh
Vidhyanagar, Gujrat, India for their motivation and
infrastructural support to carry out the research work.
 Prof. Jayeshkuar R. Pitroda assitant prof. And research scholar
civil engineering department, B.V.M. Engineering college
Vallabh Vidhyanagar.