Microsoft PowerPoint - Eco-product- s.pptDepartment of Civil and Structural Engineering The Hong Kong Polytechnic University
Use of recycled materials in construction products
Presented by: C S Poon
Department of Civil and Structural Engineering The Hong Kong Polytechnic University
Objectives
To introduce the use of recycled aggregates in different civil engineering applications
2006/3/1
Department of Civil and Structural Engineering The Hong Kong Polytechnic University
Potential applications of recycled aggregates and glass aggregates
Pre-cast concrete products such as kerbs Paving blocks Partition blocks Terrazzo tiles
Department of Civil and Structural Engineering The Hong Kong Polytechnic University
Pre-cast concrete products
Department of Civil and Structural Engineering The Hong Kong Polytechnic University
Strengths requirements for pre-cast concrete products
Grade 30/20Kerbs, edgings and quadrants
Grade 20/20Foundations and backings to kerbs, edgings and quadrants
Grade 30/20Profile barriers
Department of Civil and Structural Engineering The Hong Kong Polytechnic University
Production of pre-cast concrete kerbs Ingredients: cement, natural crushed fines, coarse recycled concrete aggregate (10 & 20 mm) and water.
14.43-pt test Breaking load (kN)
41.928-day compressive strength (MPa)
35.47-day compressive strength (MPa)
Department of Civil and Structural Engineering The Hong Kong Polytechnic University
Paving blocks
Department of Civil and Structural Engineering The Hong Kong Polytechnic University
Current HK specifications for pedestrian areas
-<23Abrasion resistance (mm)
-<45Skid resistance (BPN)
Grade BGrade A
Department of Civil and Structural Engineering The Hong Kong Polytechnic University
Current HK specifications for trafficked areas
-<23Abrasion resistance (mm)
-<45Skid resistance (BPN)
Department of Civil and Structural Engineering The Hong Kong Polytechnic University
Paving blocks
74.3Compressive strength (MPa)
4.5Cold water absorption (%)
Department of Civil and Structural Engineering The Hong Kong Polytechnic University
Paving blocks
66.2Compressive strength (MPa)
7.2Cold water absorption (%)
Department of Civil and Structural Engineering The Hong Kong Polytechnic University
Paving blocks
Ingredients: cement, fly ash, recycled concrete aggregate, crushed clay brick and water
44.7Compressive strength (MPa)
10.6Cold water absorption (%)
Department of Civil and Structural Engineering The Hong Kong Polytechnic University
Paving blocks
69.9Compressive strength (MPa)
4.11Cold water absorption (%)
2006/3/1
Department of Civil and Structural Engineering The Hong Kong Polytechnic University
Trial locations (glass blocks)
Tin King
Leung King
Department of Civil and Structural Engineering The Hong Kong Polytechnic University
Partition blocks
Department of Civil and Structural Engineering The Hong Kong Polytechnic University
Specifications for partition blocks
Department of Civil and Structural Engineering The Hong Kong Polytechnic University
Properties of partition blocks
Department of Civil and Structural Engineering The Hong Kong Polytechnic University
Trial location
Department of Civil and Structural Engineering The Hong Kong Polytechnic University
Terrazzo tiles
Department of Civil and Structural Engineering The Hong Kong Polytechnic University
Specifications for terrazzo tiles
<25-Abrasion resistance (mm)
Declared by manufacturer
-Skid resistance (BPN)
Department of Civil and Structural Engineering The Hong Kong Polytechnic University
Terrazzo tiles
Department of Civil and Structural Engineering The Hong Kong Polytechnic University
The End !