Synopsis: Increasing cases of masonry defects in construction

Collaboration Engineering Solutions and Products (K) Limited

Institute of Engineers of Kenya Conference

Kenyatta International Conference Center – Nairobi

09th May 2012

Presentation on Brick/Block Mesh Reinforcement

By: Christopher Nganga Gathini

Collaboration Engineering Solutions and Products (K) Limited

Synopsis:

Increasing cases of masonry defects in constructionLack of consistency in the quality of building materialsUse of inappropriate building materials for masonry worksNeed to specify economical and durable materials for masonry constructionNeed to sensitize the market on availability of alternative quality products

Collaboration Engineering Solutions and Products (K) Limited

Code compliance:Application:

Kenya Building CodeBS 5628 Part 2Eurocode - EC6 & EC8ACI/ASCE 530ASTM A951/951M

Manufacturing:

ASTM A653: 1997BS EN 10143:1993

Collaboration Engineering Solutions and Products (K) Limited

Types of Masonry brick/blocks:

Collaboration Engineering Solutions and Products (K) Limited

Causes of masonry defects:

Sulphate attackCorrosion of embedded fixturesDry shrinkageQuality of brick/blocksCrystallization of salts from block/brickWeather/climate action

Collaboration Engineering Solutions and Products (K) Limited

Types of masonry reinforcements:

Mesh reinforcementLadder reinforcementTruss reinforcementHoop Iron

Collaboration Engineering Solutions and Products (K) Limited

Brick Mesh Reinforcement:Features:Better bond between masonry unitsEconomical to transportEasy and economical to storeReduction in implementation time (high performance specification)No skilled labor requiredQuality assured by implementation factoryReduction in Wastes and fallingsEngineered for performance and durabilityCost savings of between kshs. 6.5 to 16.5 per meter length

Collaboration Engineering Solutions and Products (K) Limited

Truss/ladder reinforcement:Features: Reinforces a variety of masonry wallsGreatly reduces cracking that can arise from thermal stressesEnhances resistance to water penetration, as cracks are controlledIncreases lateral flexural strengthBonds exterior and interior masonry wythes together in composite wallsBonds masonry at intersecting walls and cornersIncreases elasticityIncreases performance of masonry walls under various stresses

Collaboration Engineering Solutions and Products (K) Limited

Size and installation guide:

Ladder/Mesh Width(mm)

Brick/block Width(mm)

75mm 100mm

100mm 150mm

150mm 200 – 225mm

Collaboration Engineering Solutions and Products (K) Limited

£¥¥$

Ksh.

Cost implication:

Surprisingly, Its Cheaper than hoop iron!!

Collaboration Engineering Solutions and Products (K) Limited

Best Practices:Right design considerationsProper selection of sand materialProper selection of Cement MaterialHandle material carefullyStore materials well to avoid chipping and contamination.Proper Mortar compositionSelection of right reinforcing materialProper curing of jointsProper reinforcement lapping – per product specsTrain installation crew regularly Adhere to testing requirementsPay attention to details

Collaboration Engineering Solutions and Products (K) Limited

“Building a competitive and prosperous Kenya one brick at a time”

Market Availability:

Collaboration Engineering Solutions and Products

P.O. Box 7607, 00100GPO NRB Tel: 0202509854 Fax: 0202509863, Cell: 0713944769 Email: [email protected]

website: www.cespkenya.comABC Bank Building, 2nd Floor - industrial Area Nairobi.

Expo Booth No. 10 at IEK Conference – KICC from 9th to 11th May 2012

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“Efficiency is doing things right, effectiveness is doing the right

things”

Collaboration Engineering Solutions and Products (K) Limited

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