The Construction and Use of Precast Concrete Slabs - Armtec Ltd.
description
Transcript of The Construction and Use of Precast Concrete Slabs - Armtec Ltd.
Hollowcore – Pre-stressed Concrete Slabs
Host: Scott Marshall P.Eng.
2
Join the Discussion!
3
Introduction
• Armtec is a leading global infrastructure and construction materials company
• 48 locations in Canada, including production facilities and offices in every region
• Global customer base with projects around the world • Approximately 2,000 employees, $500M • Toronto Stock Exchange trading symbol: ARF.UN
4
Introduction
• BEBO Concrete Arches
• Bin-Wall
• Bin-Wall Bridge Abutments
• Bridge Girders and Beams
• Bridge-Plate
• Communications
• Concrete Sound Fencing
• Corrugated Steel Pipe
• Double Tees
• Durisol Precast Noise Barriers
• Electrical
• Geosynthetics
• HDPE Pipe
• HDPE Tubing
• Mechanically Stabilized Earth Retaining Walls
• Multi-Plate
• Paraglas Soundstop
• Platon
• Precast Concrete Steps
• Precast Concrete Structures and Elements
• Precast Tunnel Liner
• Precast Utility Pads
• Prestressed Hollowcore Slabs
• Sports Venues
• Stormwater Treatment/Detention Systems
• Streetlight Bases and Traffic Control
• Sumps and Trenches
• Tunnel Liner Plate
• Ultra Flo Steel Pipe
• Water Control Products
5
Professional Development Hours (PDH)
• Qualifies as 1 hour Informal (20 Professional Development Hours maximum per year)
• If you have provided an e-mail and are logged on throughout the presentation, a formal completion certificate will be sent to you within one week
• Enter CPD activities in the APEGBC On-line Reporting Centre: http://www.apeg.bc.ca/prodev/online.html
• A full copy of the Continuing Professional Development (CPD) Guideline can be viewed at: http://www.apeg.bc.ca/prodev/documents/cpdguideline.pdf
6
Introduction
Scott L Marshall P. Eng.Bridge and Marine Structures Specialist
Senior Business Development Engineer
Engineered Solutions Division of Armtec
• Scott has worked the last 32 years with Armtec in Engineered Solutions promoting and selling precast prestressed concrete bridge girders, marine structures and industrial structures.
• He was involved in the development of the hybrid system of using precast concrete Hollowcore slabs and cast in place slab bands on many Real Canadian Superstores in BC.
7
What is Hollowcore
• Pre-stressed, precast concrete
• Primary use is floor and roof slabs• Continuous voids are used to reduce weight and improve
structural performance• Cast in 1220 mm widths• Thickness (Richmond BC)
o 203 mmo 305 mmo 356 mm
8
What is Hollowcore
9
What is prestressing?
10
Casting machine and beds
11
Casting beds and saw
12
Method of Construction – HC on forming
13
Real Canadian Superstore - Kamloops
14
Real Canadian Superstore - Kamloops
15
Real Canadian Superstore - Kamloops
16
Method of Construction – HC on slab band
17
Edmonds Centre – Burnaby
18
Edmonds Centre – Burnaby
19
Creative Structures – Surrey City Centre
20
Creative Structures – The Liu Centre
21
Uptown Mall in Victoria
22
Uptown Mall in Victoria
Wal-Mart Store
23
Uptown Mall in Victoria
24
Environment
Environment Friendly Hollowcore with Fly ash
25
Other products use Hollowcore
26
Summary
• Pre-stressed, precast concrete
• Primary use is floor and roof slabs• Reduce weight and improve structural performance• Cast in 1220 mm widths• Various thickness to match to loading and span
• Benefits
• Longer clear spans - space versatility• Increase speed of construction - early occupancy• Design for control of deflection• Design for control of flexural cracking• Environmental applications