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Synopsis: Increasing cases of masonry defects in construction

Institute of Engineers of Kenya Conference Kenyatta International Conference Center – Nairobi 09 th May 2012 Presentation on Brick/Block Mesh Reinforcement By: Christopher Nganga Gathini. Synopsis: Increasing cases of masonry defects in construction

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Synopsis: Increasing cases of masonry defects in construction

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  1. Institute of Engineers of Kenya ConferenceKenyatta International Conference Center – Nairobi09th May 2012Presentation on Brick/Block Mesh ReinforcementBy: Christopher Nganga Gathini

  2. Synopsis: • Increasing cases of masonry defects in construction • Lack of consistency in the quality of building materials • Use of inappropriate building materials for masonry works • Need to specify economical and durable materials for masonry construction • Need to sensitize the market on availability of alternative quality products

  3. Code compliance: • Application: • Kenya Building Code • BS 5628 Part 2 • Eurocode - EC6 & EC8 • ACI/ASCE 530 • ASTM A951/951M • Manufacturing: • ASTM A653: 1997 • BS EN 10143:1993

  4. Types of Masonry brick/blocks:

  5. Causes of masonry defects: • Sulphate attack • Corrosion of embedded fixtures • Dry shrinkage • Quality of brick/blocks • Crystallization of salts from block/brick • Weather/climate action

  6. Types of masonry reinforcements: • Mesh reinforcement • Ladder reinforcement • Truss reinforcement • Hoop Iron

  7. Brick Mesh Reinforcement: • Features: • Better bond between masonry units • Economical to transport • Easy and economical to store • Reduction in implementation time (high performance specification) • No skilled labor required • Quality assured by implementation factory • Reduction in Wastes and fallings • Engineered for performance and durability • Cost savings of between kshs. 6.5 to 16.5 per meter length

  8. Truss/ladder reinforcement: • Features: • Reinforces a variety of masonry walls • Greatly reduces cracking that can arise from thermal stresses • Enhances resistance to water penetration, as cracks are controlled • Increases lateral flexural strength • Bonds exterior and interior masonry wythes together in composite walls • Bonds masonry at intersecting walls and corners • Increases elasticity • Increases performance of masonry walls under various stresses

  9. Size and installation guide:

  10. Cost implication: Surprisingly, Its Cheaper than hoop iron!! £ ¥¥ $ Ksh.

  11. Best Practices: • Right design considerations • Proper selection of sand material • Proper selection of Cement Material • Handle material carefully • Store materials well to avoid chipping and contamination. • Proper Mortar composition • Selection of right reinforcing material • Proper curing of joints • Proper reinforcement lapping – per product specs • Train installation crew regularly • Adhere to testing requirements • Pay attention to details

  12. Market Availability: • Collaboration Engineering Solutions and Products • P.O. Box 7607, 00100GPO NRB Tel: 0202509854 Fax: 0202509863, Cell: 0713944769 Email: info@cespkenya.com website: www.cespkenya.com • ABC Bank Building, 2nd Floor - industrial Area Nairobi. “Building a competitive and prosperous Kenya one brick at a time” Expo Booth No. 10 at IEK Conference – KICC from 9th to 11th May 2012

  13. What we believe at CESP • “Efficiency is doing things right, effectiveness is doing the right things” ?

  14. THANK YOU!

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